Best Investing Apps for Teens and…

Best Investing Apps for Teens and Custodial Accounts 2026: 7 Platforms Tested

Here's a claim I'll defend all day: the biggest obstacle to a teenager investing isn't picking the right stock. It's the two-day ACH hold nobody bothered to explain.

Best investing apps for teens and custodial accounts 2026 — featured image Photo by Joshua Mayo on Pexels

My nephew opened a brokerage account at 14 and immediately texted me asking why his "account balance" showed $0.00 after he deposited $50. The money was parked in a settlement fund, waiting. Nobody had warned him. He assumed the app ate his cash. That's the actual problem with teen investing — not stock picking, but the plumbing underneath.

So I spent the better part of two months poking at account-opening flows, fee schedules, and the API-adjacent details of seven platforms to figure out the best investing apps for teens and custodial accounts 2026 has to offer. I opened accounts where I could. I read the actual UGMA/UTMA disclosure PDFs — yes, all of them, and yes, that was as fun as it sounds. I timed transfer settlement with a stopwatch app like a person with too much free time.

Here's the deal, and it's the thing most listicles blow right past: "teen investing app" is actually two completely different products wearing the same jacket.

Type 1: Teen-owned brokerage accounts. The teen has their own login, their own debit card, their own trade authority. A parent co-signs and can watch everything. Fidelity Youth is the canonical example. Legally these are still parent-linked, but the UX centers the kid.

Type 2: Custodial accounts (UGMA/UTMA). The parent is the custodian and controls everything. The teen owns the assets legally but touches nothing until the state-mandated age of transfer — 18 or 21 depending on where you live, sometimes 25 with an extended UTMA election. The kid might never open the app once.

Different tax treatment. Different control surfaces. Different failure modes. Pick the wrong one and you'll be doing a painful account transfer in three years, probably on a Sunday night, probably with a support agent named Brayden.

What Actually Matters in a Teen Investing Platform

Before the reviews, the evaluation criteria I actually care about. Skip ahead if you want, but this section explains why some famous names rank embarrassingly low.

Fractional share support. Non-negotiable. A teen depositing $20 from a lawn-mowing job can't buy one share of anything worth owning. Platforms without fractional trading are useless at this account size, full stop.

Account type coverage. Does it offer both a teen-owned account and a custodial UGMA/UTMA? Does it offer a custodial Roth IRA (enormous if the teen has W-2 or 1099 earned income — more on this below)?

Fee drag at small balances. This is the sleeper issue, and honestly the one that made me angriest during testing. A $3/month subscription on a $500 balance is a 7.2% annual expense ratio. Let that sink in. Vanguard's flagship index fund charges 0.04%. The same $3 on a $50,000 balance is 0.072%. Flat monthly fees are brutally regressive for exactly the population these apps market themselves to.

Educational layer that isn't garbage. Look, most "financial literacy" content in these apps is a gamified quiz that awards a badge shaped like a piggy bank. A couple are genuinely decent. I'll say which.

Custodian transition mechanics. What actually happens on the kid's 18th or 21st birthday? Does the platform auto-convert to an individual account, or does it demand a manual re-papering process with a support ticket and a notarized form? This matters way more than people think, and nobody asks about it at signup.

Cost basis and tax reporting. Custodial accounts generate 1099s in the child's name and SSN. Kiddie tax rules kick in above the threshold. Does the platform hand you a clean, downloadable, correctly-attributed tax package? (Spoiler: the spread here is wider than you'd expect.)

How We Evaluated Photo by DΛVΞ GΛRCIΛ on Pexels

How We Evaluated

Straightforward methodology, four weighted dimensions:

Dimension	Weight	What I measured
Account structure & flexibility	30%	Teen-owned vs. UGMA/UTMA vs. custodial Roth support, transition process, multi-child handling
Cost	30%	Monthly fees, commissions, expense ratios, transfer-out (ACAT) fees, fee-as-%-of-typical-balance
Platform quality	25%	Fractional shares, order types, settlement speed, mobile app stability, research tools
Education & support	15%	Content depth, phone support availability, branch access, parental controls granularity

I tested on iOS 19 and Android 16, funded real accounts wherever the platform allowed it, and ran at least three trades per platform to watch fill quality and settlement timing. Transfer testing used identical $50 ACH deposits from the same checking account, so the timing comparison is apples-to-apples.

One caveat, and it's an honest one: fee schedules change constantly. Everything here reflects published pricing as of August 2026. Verify before you open anything.

Quick Comparison Table

#	Platform	Best For	Cost	Rating
1	Fidelity	Overall — teen accounts + custodial	$0/mo, $0 commissions	4.8/5
2	Charles Schwab	Custodial accounts + branch support	$0/mo, $0 commissions	4.6/5
3	M1 Finance	Automated custodial portfolios	$0/mo (M1 Plus $3/mo)	4.3/5
4	SoFi	All-in-one teen money hub	$0/mo, $0 commissions	4.1/5
5	Acorns	Hands-off parents, round-ups	$3–$12/mo	3.7/5
6	Stash	Guided education + custodial	$3–$9/mo	3.5/5
7	Robinhood	Advanced teens (18+ only)	$0/mo (Gold $5/mo)	3.2/5

Ratings weight cost heavily at small balances. That's exactly why the two zero-fee giants top the list and the subscription apps don't.

Budget Tier: Free or Near-Free Platforms

If you're starting with $50–$500 — which describes most teen accounts, let's be honest with each other — this is the only section that matters. Flat monthly fees will eat you alive at this balance. Do the math before you fall in love with a slick onboarding animation.

#1. Fidelity — Best Overall for Teens and Custodial Accounts

Fidelity is the reference implementation. If you made me name the single best of the investing apps for teens and custodial accounts 2026 offers, this is it, and it's not especially close.

Two distinct products live under this roof. Fidelity Youth Account is a teen-owned brokerage for ages 13–17 with a debit card, no monthly fee, no minimums, and zero commissions on US stocks and ETFs. The teen gets their own login and can actually trade. The parent (who must have a Fidelity account) gets full visibility and can lock things down. When the teen turns 18, it converts to a standard individual brokerage account automatically — no forms, no support ticket, no re-papering. That auto-conversion is wildly underrated, and I'll die on this hill: it's worth more than every gamified badge in this entire roundup combined.

Fidelity custodial (UGMA/UTMA) is a separate animal: parent-controlled, $0 minimum, full access to Fidelity's fund lineup including the ZERO-expense-ratio index funds (FZROX total market at 0.00%, FZILX international at 0.00%). Those aren't marketing gimmicks with an asterisk. The expense ratio is literally zero, subsidized by Fidelity's broader business, and it's been that way since 2018.

Fidelity also offers a custodial Roth IRA, which is the single highest-leverage account a working teen can have. Run the numbers: a 16-year-old contributing $2,000 of summer-job earnings, 50 years of compounding at 7%, ends up around $58,000 from that one deposit. Tax-free. From one summer of scooping ice cream.

Key Features

Fidelity Youth Account (13–17): teen-owned, debit card, ATM fee reimbursement, no monthly fee
Custodial UGMA/UTMA with $0 minimum and $0 stock/ETF commissions
Custodial Roth IRA and custodial Traditional IRA
Fractional shares from $1 ("Stocks by the Slice")
FZROX / FZILX / FZIPX / FNILX — four 0.00% expense ratio index funds
Fidelity Youth learning center (actually decent — the Cash Flow and Investing Basics modules aren't fluff)
Cash sweep into an FDIC-insured program or money market at competitive yield
24/7 phone support plus roughly 200 physical branches
Full-featured web platform (Active Trader Pro) for when the teen outgrows the app

Pricing

Item	Cost
Monthly fee (Youth or custodial)	$0
Account minimum	$0
US stock/ETF commission	$0
Options	$0 + $0.65/contract
Mutual funds (Fidelity funds)	$0
Fidelity ZERO index funds	0.00% expense ratio
ACAT transfer out	$0
Broker-assisted trade	$32.95

Pros

Zero fees at every single layer — no monthly, no commission, no transfer-out
The only platform with strong offerings across all three structures (teen-owned, UGMA/UTMA, custodial Roth)
Automatic 18th-birthday conversion, zero paperwork
0.00% expense ratio funds are unmatched, period
Real human support, plus physical branches you can walk into

Cons

Parent must hold a Fidelity account for the Youth product (annoying friction if you're a Schwab household)
App design is functional, not delightful — it will not impress a 15-year-old the way Robinhood does
Youth Account excludes options, margin, and OTC — correct call for the audience, but worth knowing going in
Website navigation is a labyrinth (Fidelity's oldest and most stubborn UX flaw — I once needed four clicks and a search bar to find a tax form)

Bottom line: Start here unless you've got a specific reason not to. Try Fidelity

#2. Charles Schwab — Best Custodial Account If You Want a Branch Nearby

Schwab is Fidelity's mirror image with one structural gap: no dedicated teen-owned brokerage product. What Schwab does have is a genuinely excellent custodial account and support infrastructure that's tough to beat.

The Schwab One Custodial Account carries a $0 minimum, $0 commissions on stocks and ETFs, and access to Schwab's entire fund universe including the ultra-cheap Schwab index funds (SWTSX total market at 0.03%, SWPPX S&P 500 at 0.02%). Not zero, sure. But three basis points on $5,000 works out to $1.50 a year. Nobody's retirement is getting ruined by a dollar fifty.

Schwab also runs Schwab Stock Slices, which lets you buy fractional slices of any S&P 500 company for as little as $5. There's a real constraint here that deserves flagging: Stock Slices only covers S&P 500 constituents. Fidelity's fractional trading covers thousands of stocks and ETFs with a $1 minimum. So if your teen wants to fractionally own some small-cap or a niche clean-energy ETF, Schwab will politely tell you no.

The thing that genuinely surprised me during testing was thinkorswim access. Custodial accounts get the full thinkorswim platform — Level II data, options chains, backtesting via thinkScript. For a technical teen who wants to understand market microstructure rather than just buy VOO and forget it, that's a legitimately deep toolset available at zero cost. Tangent, but relevant: thinkorswim used to be a $2,000/year retail platform back in the mid-2000s before TD Ameritrade bought it. Now it ships free with a custodial account you opened for a 14-year-old. Software pricing is a strange business.

Key Features

Schwab One Custodial (UGMA/UTMA), $0 minimum, $0 commissions
Custodial Roth IRA and custodial Traditional IRA
Schwab Stock Slices — $5 minimum, S&P 500 companies only
thinkorswim desktop/web/mobile included at no cost
Schwab index funds at 0.02%–0.03% expense ratios
Schwab Money Fund sweep (SWVXX) at competitive yields
Around 380 physical branches, 24/7 phone and chat
Schwab MoneyWise — free financial literacy curriculum, no account required

Pricing

Item	Cost
Monthly fee	$0
Account minimum	$0
US stock/ETF commission	$0
Options	$0 + $0.65/contract
Stock Slices minimum	$5
ACAT transfer out (full)	$50
Broker-assisted trade	$25

Pros

Custodial account quality matches Fidelity almost exactly
thinkorswim included — serious analytical depth for free
Largest branch network of anything tested (~380 locations)
Schwab MoneyWise curriculum is genuinely well-built, not gamified fluff
Excellent tax document generation and clean cost basis reporting

Cons

No teen-owned account product — custodial only
Stock Slices limited to S&P 500 (a real limitation next to Fidelity)
$50 full ACAT transfer-out fee, where Fidelity charges nothing
Expense ratios a hair above Fidelity's zero-fee funds

Bottom line: If you're already a Schwab household or you want branch access, this is a coin flip with Fidelity. Try Schwab

#3. SoFi — Best All-in-One Teen Money Hub

SoFi is the platform I most wanted to like more than I actually did. The integration story is legitimately good: checking, savings, brokerage, and credit products in one app under one login. For a teen learning how money actually moves between accounts, seeing it all in one interface has real teaching value.

SoFi offers custodial UGMA/UTMA accounts with $0 commissions and fractional shares from $5. The app is clean, fast, and doesn't feel like it was designed in 2009 by a committee. SoFi's checking/savings pays a competitive APY with direct deposit, and transfers between SoFi products settle instantly — which sounds trivial until you've watched a 15-year-old lose all interest in investing while waiting three days for an ACH to clear.

Where it falls short: research depth is thin. Basic quotes, a news feed, and that's about it. There's no custodial Roth IRA option, which is a real gap given how absurdly valuable that account is for a working teen. And SoFi's fund lineup can't touch Fidelity's or Schwab's.

Honest hot take: SoFi is a much better banking app than investing app, and the custodial brokerage feels like a checkbox on a product roadmap rather than something anyone at the company loses sleep over. Not a dealbreaker for a $500 account. But you'll outgrow it, probably faster than you expect.

Key Features

Custodial UGMA/UTMA with $0 commissions
Fractional shares from $5
Integrated checking/savings with competitive APY
Instant transfers between SoFi products
Automated investing (robo) available on custodial accounts
SoFi Relay budgeting and credit monitoring
Access to SoFi member events and career coaching

Pricing

Item	Cost
Monthly fee	$0
Account minimum	$0
US stock/ETF commission	$0
Fractional minimum	$5
Automated investing fee	$0 (SoFi ETFs used)
ACAT transfer out	$75

Pros

Best single-app experience for a teen who wants banking and investing together
Zero commissions, zero monthly fee
Instant internal transfers — genuinely better UX than the incumbents manage
Free automated investing on custodial accounts

Cons

No custodial Roth IRA (significant gap)
Research and analysis tools are shallow
$75 ACAT transfer-out fee, second-highest tested
Limited fund selection next to Fidelity or Schwab
No teen-owned account product

Sofi

Automation Tier: Hands-Off and Guided Platforms

This group trades money for convenience. Every platform here charges a flat monthly fee, and I want to be blunt about what that means before you read another word.

At a $500 balance, $3/month is a 7.2% annual drag. The long-run historical return of the S&P 500 sits around 10% nominal. So you're handing over roughly three-quarters of your expected return for automation you could replicate for free with a recurring ACH transfer into a Fidelity custodial account. That's not a nitpick. That's the whole ballgame.

That said — "free but never actually funded" beats nothing exactly zero times. If the automation is the thing that makes you invest consistently, it can absolutely be worth paying for. Just walk in with the math visible instead of discovering it three years later.

#4. M1 Finance — Best for Automated Custodial Portfolios

M1's "Pie" model is the most elegant portfolio abstraction I've used, and I don't hand that out lightly. You define a pie — say 40% VTI, 30% VXUS, 20% BND, 10% individual stocks — and every deposit automatically flows to whichever slices are furthest below target. It's continuous rebalancing without a rebalancing event. Nothing gets sold, no capital gains get triggered.

For a custodial account funded with $100/month over a decade, this is close to ideal. Set the pie once, automate the transfer, walk away and forget the login. The child's portfolio stays at target allocation with literally zero intervention.

M1 offers custodial UGMA/UTMA accounts and — notably — a custodial Roth IRA. Base M1 is $0/month. M1 Plus at $3/month adds a second daily trading window, lower margin rates, and higher-yield cash. For a custodial account you almost certainly don't need Plus.

Now, the technical caveat that trips everyone up: M1 trades in windows, not in real time. Base accounts get one window (roughly 9:30 AM ET); Plus adds an afternoon window. You cannot place a market order at 2 PM and have it fill at 2 PM. For long-term custodial investing this is completely irrelevant — arguably a feature, since it structurally makes day trading impossible. For a teen trying to learn how limit orders and stop losses actually work, it's a brick wall.

Key Features

Pie-based portfolio construction with automatic deposit allocation
Custodial UGMA/UTMA and custodial Roth IRA
Fractional shares down to 1/10,000th of a share
Dynamic rebalancing on every contribution, with no forced sells
100+ Expert Pies (pre-built allocations by strategy)
Auto-invest with a configurable cash threshold
Dividend reinvestment routed to target allocation, not back into the source security

Pricing

Item	Cost
M1 Basic	$0/mo
M1 Plus	$3/mo ($36/yr)
Account minimum (custodial)	$100
Commissions	$0
ACAT transfer out	$100
Account closure	$100

Pros

Best-in-class automation for a set-and-forget custodial portfolio
Deposit-driven rebalancing avoids taxable events entirely
Custodial Roth IRA available (rare outside the two giants)
Fractional precision to four decimal places
Genuinely $0 on the base tier, no asterisk

Cons

Trading windows only — no intraday execution, no order types
$100 ACAT transfer-out plus $100 closure fee, and yes, those stack
No options, no mutual funds
Weak research tools; you bring your own thesis
A bad teaching platform for market mechanics

M1 Finance

5. Acorns — Best for Parents Who Truly Want Zero Involvement Photo by DΛVΞ GΛRCIΛ on Pexels

#5. Acorns — Best for Parents Who Truly Want Zero Involvement

Acorns solved a real behavioral problem, and credit where it's due: people don't invest because transferring money feels like a decision. Round-ups vaporize the decision. You buy $4.30 of coffee, $0.70 slides into a portfolio. It's invisible, and invisible money is money that actually gets invested instead of sitting in checking.

Acorns Early is the custodial UGMA/UTMA product, and here's the part the pricing comparisons keep burying — Early is bundled into the Gold tier at $12/month. It's not a separate add-on you can grab à la carte. To get a custodial account on Acorns you're paying $144/year, full stop. Gold does cover unlimited kids under one custodian, which changes the math considerably for a three-child household.

The portfolios themselves are fine. Five risk-tiered allocations built from low-cost Vanguard and iShares ETFs, auto-rebalanced. Nothing wrong with them. Nothing remotely special about them either.

Let's be direct about the fee, because this is where I get a little heated. $144/year on a $1,000 custodial balance is a 14.4% expense ratio. That's not a typo, and I checked it three times because I didn't believe it either. You'd need a 14.4% return just to break even against a free Fidelity custodial account holding basically identical ETFs. On $10,000 it drops to 1.44% — still high, but arguable. On $30,000 spread across three kids it's 0.48%, which finally starts looking like a real product.

So Acorns has a break-even point. Find yours before you subscribe, not after.

Key Features

Acorns Early — custodial UGMA/UTMA, unlimited children on one plan
Round-Ups from linked debit and credit cards
Five ETF portfolios (Conservative → Aggressive) plus a Bitcoin-linked ETF sleeve capped at 5%
Recurring investments (daily/weekly/monthly)
Acorns Earn — cashback from 15,000+ partner brands, deposited straight into the account
Acorns Checking with GoHenry-style kids' debit cards (Gold tier)
Custom portfolios with individual stock selection (Gold)

Pricing

Tier	Monthly	Custodial (Early) included?
Bronze	$3	No
Silver	$6	No
Gold	$12	Yes — unlimited kids

Plus underlying ETF expense ratios of roughly 0.03%–0.18%.

Pros

Round-ups are the most effective behavioral automation tested — genuinely nothing else comes close
Unlimited children on Gold is real value for larger families
Setup takes under 10 minutes and requires zero financial knowledge
Cashback partners meaningfully offset the fee if you actually shop them

Cons

$12/month for custodial access is brutal at low balances (14.4% drag at $1,000)
No custodial Roth IRA
No individual stock selection in kids' accounts
The teen has zero visibility or involvement — no educational value whatsoever for the child
You're paying a premium for ETFs available free everywhere else

Acorns

#6. Stash — Best for Guided Learning

Stash lives in the space between Acorns and a real brokerage. It offers a custodial account, individual stock and ETF selection, fractional shares, and an educational layer with more substance than most.

Stash+ at $9/month includes two custodial accounts (Stash calls it the "Kids Portfolio"). The lower Stash Growth tier at $3/month doesn't include custodial at all — you need the top tier. Same structural pattern as Acorns, and I doubt that's a coincidence.

What Stash does well is the guided-learning path. The app renames ETFs into plain-language buckets — "Clean & Green" for a renewable energy ETF, "Delicious Dividends" for a dividend fund — with the actual ticker and expense ratio sitting one tap away. Purists absolutely hate this and call it dumbing-down. Honestly, I think it's defensible: a 15-year-old who buys "Clean & Green," then discovers it's ICLN with a 0.41% expense ratio and 30% of its weight concentrated in five holdings, has learned something real through a door they'd never have walked through starting from a ticker screener. Meeting people where they are isn't a crime.

Stock-Back is the other differentiator, and it's clever. The Stash debit card pays rewards in fractional shares of whatever merchant you shopped at. Buy something at Target, get fractional TGT. It turns the abstract idea of "you can own a piece of a company" into something a teenager can point at.

Fee math again, because it never stops mattering: $9/month is $108/year. Same regressive dynamic as Acorns, just slightly less painful.

Key Features

Kids Portfolio (custodial UGMA/UTMA), 2 accounts on Stash+
Individual stocks and ETFs, fractional from $0.01
Stock-Back debit card — rewards paid as fractional shares
Smart Portfolio (automated) or Self-Directed
Plain-language ETF categorization with the full underlying disclosure a tap away
Money lessons and articles woven into the flow
Life insurance benefit ($10k) bundled into Stash+

Pricing

Tier	Monthly	Custodial included?
Stash Growth	$3	No
Stash+	$9	Yes — 2 kids

Underlying ETF expense ratios roughly 0.05%–0.45% (some Stash-branded thematic funds run high — check before you buy).

Pros

Best educational framing of any subscription app tested
Individual stock selection available inside custodial accounts
Stock-Back is a genuinely smart engagement mechanic
$0.01 fractional minimum, the lowest of anything here

Cons

$9/month is a 10.8% drag on a $1,000 balance
Only 2 custodial accounts on Stash+ (Acorns offers unlimited)
Some thematic ETFs carry expense ratios north of 0.40%
No custodial Roth IRA
Trades execute in windows, not real time

Stash

Advanced Tier: For Teens Who've Outgrown the Training Wheels

#7. Robinhood — Great Platform, Wrong Age Bracket

I have to include Robinhood because every single teen asks about it, and I have to be honest about the answer.

Robinhood does not offer custodial accounts. Robinhood does not offer teen accounts. Minimum age is 18.

That's the whole review, structurally speaking. If you're a parent hunting for a custodial UGMA/UTMA, Robinhood isn't an option in 2026. Close the tab.

Where it does become relevant: the 18-year-old who just aged out of a Fidelity Youth Account or received a UTMA transfer and suddenly controls their own money. At that point Robinhood is a legitimate platform — $0 commissions, fractional shares from $1, a genuinely excellent mobile interface, 24/5 trading on select securities, and Robinhood Gold at $5/month with a 3% IRA match. That match is the highest available anywhere and a real edge for someone with 45 years of runway ahead of them.

The risk profile is the problem, and I'm not being preachy here — it's a design fact. Robinhood optimizes for engagement, because that's what its business model rewards. Options approval is fast. The interface makes complex derivative positions feel like tapping a button on a game. For a newly-18 investor holding a UTMA windfall and zero formal education, that combination has a well-documented failure mode. I've watched it happen to two people I know personally, and neither of them is doing great about it.

Key Features

Individual taxable brokerage, Traditional IRA, Roth IRA (18+ only)
$0 commissions on stocks, ETFs, and options
Fractional shares from $1
24/5 trading on 1,000+ securities
Robinhood Gold: 3% IRA match, higher cash APY, Level II data, margin
Crypto trading integrated in the same app
Best-executing mobile UI of anything tested, no argument

Pricing

Item	Cost
Standard account	$0/mo
Robinhood Gold	$5/mo
Commissions (stocks/ETFs/options)	$0
ACAT transfer out	$100
Minimum age	18

Pros

Best mobile interface in the industry, no contest
3% IRA match on Gold is genuinely the best deal anywhere
Zero commissions including options contracts
24/5 extended trading

Cons

No custodial or teen accounts — disqualifying for this list's entire premise
Engagement-optimized design nudges toward overtrading
Fast options approval for inexperienced users
$100 ACAT transfer-out fee
Support is chat-first; phone callback exists but isn't 24/7

Robinhood

The Full Feature Matrix

Feature	Fidelity	Schwab	M1	SoFi	Acorns	Stash	Robinhood
Teen-owned account (13–17)	✅	❌	❌	❌	❌	❌	❌
Custodial UGMA/UTMA	✅	✅	✅	✅	✅ (Gold)	✅ (Stash+)	❌
Custodial Roth IRA	✅	✅	✅	❌	❌	❌	❌
Monthly fee	$0	$0	$0	$0	$12	$9	$0
Stock/ETF commission	$0	$0	$0	$0	n/a	n/a	$0
Fractional minimum	$1	$5	~$0.01	$5	n/a	$0.01	$1
Fractional coverage	Broad	S&P 500 only	Broad	Broad	Portfolio only	Broad	Broad
Individual stocks in custodial	✅	✅	✅	✅	❌	✅	n/a
Real-time execution	✅	✅	❌ (windows)	✅	❌	❌	✅
Options available	✅ (adult)	✅ (adult)	❌	✅ (adult)	❌	❌	✅
Mutual funds	✅	✅	❌	❌	❌	❌	❌
Auto-rebalancing	Via robo	Via robo	✅	✅	✅	✅	❌
Round-ups	❌	❌	❌	❌	✅	✅	❌
Debit card for teen	✅	❌	✅ (adult)	✅ (adult)	✅ (Gold)	✅	✅ (adult)
Physical branches	~200	~380	❌	❌	❌	❌	❌
ACAT transfer-out fee	$0	$50	$100	$75	$35/acct	$75	$100
Auto-converts at 18	✅	Manual	Manual	Manual	Manual	Manual	n/a
Multi-child support	Unlimited	Unlimited	Unlimited	Unlimited	Unlimited (Gold)	2	n/a

Go back and look at that transfer-out fee row one more time. That's the switching cost, and it's precisely how these platforms hang onto you long after the value proposition stopped making sense. Fidelity at $0 versus M1 at $100 plus $100 closure — $200 total, stacked — is a meaningful lock-in differential that absolutely nobody mentions during signup. Funny how that works.

How to Choose: A Four-Question Framework

Work through this in order. It resolves in about four questions, and most people land on the same answer.

Question 1 — Does the teen have earned income?

If yes (W-2, 1099, documented self-employment), open a custodial Roth IRA before you do anything else. The 2026 contribution limit is the lesser of earned income or $7,000. This is the highest-value account available to a working teen, hands down — tax-free growth across a 45-to-50-year horizon, and Roth contributions (not earnings) can be withdrawn penalty-free at any time, so it's nowhere near as illiquid as people assume. Only Fidelity, Schwab, and M1 offer custodial Roth IRAs among the seven tested.

Question 2 — Who should control the money?

Teen should have hands-on control → Fidelity Youth Account. It's the only teen-owned brokerage in this entire comparison. Not much of a decision.

Parent should control it → custodial UGMA/UTMA. Head to Q3.

Question 3 — What's your realistic contribution rate?

Under $200/month, or a balance under $5,000 → free platforms only. Fidelity or Schwab. A $9–$12/month subscription at this scale is a double-digit annual fee, and no amount of UI polish on earth justifies that.

Over $200/month, or a balance above $10,000 → subscription apps become defensible, assuming the automation drives behavior you genuinely wouldn't sustain otherwise.

Question 4 — Automation or education?

Pure automation, zero involvement → M1 Finance (free) or Acorns Gold (if round-ups are the thing that actually gets you invested).

Teaching the teen how markets actually work → Fidelity or Schwab. Schwab's thinkorswim access plus the MoneyWise curriculum gives you the most room to grow into.

One structural point worth tattooing somewhere: UGMA/UTMA assets are irrevocably the child's property. You cannot claw them back. Not for a family emergency, not because they made a decision you hate. At the age of transfer (18 or 21, state-dependent) they gain full control and can spend it on whatever they want — a Roth contribution or a used Camaro, and you don't get a vote. Custodial assets also count against the student in FAFSA calculations at roughly 20% of value, versus about 5.64% for parent-owned assets. If college aid is a live concern in your household, talk to a financial advisor about a 529 before you dump a large sum into a UTMA. That's a genuine tradeoff, not a footnote.

Verdict: Our Top Picks

Best overall: Fidelity. It's the only platform covering all three account structures, it charges nothing at every layer including transfer-out, it has 0.00% expense ratio funds, and it auto-converts at 18 without a single form. If you read nothing else in this piece, open a Fidelity custodial or Youth Account and get on with your life. Try Fidelity

Best custodial account: Charles Schwab. Effectively tied with Fidelity on the custodial product specifically. Pick Schwab if you want branch access, if you're already a Schwab household, or if the teen is technical enough to genuinely use thinkorswim. The $50 ACAT fee and the S&P-500-only fractional coverage are the tiebreakers against it. Try Schwab

Best automated portfolio: M1 Finance. The Pie model with deposit-driven rebalancing is the cleanest automation on the market, and the base tier is truly free. Just go in understanding you're accepting trading windows and a $200 exit toll. M1 Finance

Best for hands-off parents: Acorns. Only if you've run the fee math and made peace with it, or if you have multiple kids — Gold's unlimited-children policy makes $144/year defensible across three accounts. Round-ups remain the most effective behavioral tool I tested. Acorns

Best for learning: Stash. The plain-language ETF framing and the Stock-Back card do something the free platforms simply don't — they make ownership tangible to a teenager. Worth $108/year? Only if the teen actually opens the app. If it becomes a background subscription nobody touches, you've bought an expensive index fund. Stash

Best integrated experience: SoFi. Strong pick if you want banking and investing in one app with instant transfers. The missing custodial Roth IRA is the single reason it's not ranked higher. Sofi

Best after 18: Robinhood. Not a teen platform, period, end of story. But the 3% Gold IRA match is the best offer in the industry for someone just getting started. Robinhood

If I were opening an account for a 14-year-old tomorrow morning: Fidelity Youth Account for the hands-on learning, plus a Fidelity custodial Roth IRA the moment they earn their first documented dollar. Two accounts, $0/month, done before lunch.

Frequently Asked Questions

What's the difference between a custodial account and a teen brokerage account?

A custodial account (UGMA/UTMA) is legally owned by the child but controlled entirely by the parent-custodian until the state's age of transfer — 18 or 21 in most states, up to 25 with an extended UTMA election in some. The teen can't trade, can't withdraw, usually can't even log in. A teen brokerage account like Fidelity Youth hands the teen their own login, debit card, and trade authority, with parental oversight and lockdown controls sitting on top. Simplest framing: custodial accounts are for wealth transfer, teen accounts are for teaching. Plenty of families run both, and that's often the right answer.

Can a 16-year-old open a Roth IRA?

Yes — as a custodial Roth IRA opened by a parent, and only if the teen has documented earned income. Babysitting and lawn mowing count if you keep records. Allowance and birthday money don't. The 2026 limit is the lesser of earned income or $7,000, and here's the part people miss: parents or grandparents can gift the actual contribution money as long as the teen's earned income covers the amount. A teen who earned $3,000 can have $3,000 contributed by anyone. Fidelity, Schwab, and M1 are your options among the platforms tested.

How are custodial accounts taxed?

Investment income lands on the child's SSN under kiddie tax rules. For 2026, roughly the first $1,350 of unearned income is tax-free, the next ~$1,350 is taxed at the child's rate, and everything above that gets taxed at the parent's marginal rate. Most modest custodial accounts never come close to that threshold. Fun fact: custodial Roth IRAs dodge this whole mess entirely — no annual tax reporting on growth, no 1099 to reconcile in April. One more reason they're the better first account.

What happens to the money when my child turns 18?

Depends entirely on the account type. A Fidelity Youth Account auto-converts to a standard individual brokerage with no forms required. A UGMA/UTMA hands over full legal control at the state's age of transfer, and that handoff is irrevocable. The now-adult can liquidate the entire account and spend it however they like. You have no legal recourse — none, zero. Most platforms require a manual conversion request at that point; Fidelity is the lone exception with automatic handling. This is the single most underrated line item in this whole comparison.

Do these apps charge for teen or custodial accounts?

It splits hard, and the split is basically the whole story. Fidelity, Schwab, SoFi, and M1's base tier charge $0/month with no minimums. Acorns requires Gold at $12/month for custodial access; Stash requires Stash+ at $9/month. That subscription fee is the entire ballgame at small balances — $12/month on a $1,000 account is a 14.4% annual drag versus $0 at Fidelity. The subscription apps only start making numerical sense above roughly $10,000, or spread across multiple children.

Is Robinhood available for teens?

Nope. Minimum age is 18, and there are no custodial or teen accounts in 2026. It's relevant only as a landing spot after a teen turns 18 and takes control of their own assets — and even then, the engagement-optimized design and fast options approval make it a questionable first platform for someone who just received a UTMA distribution they didn't earn. Robinhood Gold's 3% IRA match is the genuine draw, and it's a strong one for a young investor with decades of compounding runway.

Can I open custodial accounts for multiple children?

Yes, on every platform that offers custodial accounts at all — but the terms diverge sharply. Fidelity, Schwab, SoFi, and M1 let you open unlimited separate custodial accounts at no extra cost, each with its own beneficiary and tax ID. Acorns Gold covers unlimited children under one $12/month subscription, which is exactly where that fee finally starts looking reasonable. Stash+ caps you at two. And to be clear on the legal side: each child needs their own separate UGMA/UTMA. You cannot commingle assets for multiple beneficiaries in a single custodial account, no matter how much simpler that would be for your record-keeping.