American Express High Yield Savings has no minimum balance and no minimum opening deposit. The full APY (~4.00%) applies to any positive balance — from $1 to $1 million. There are no monthly fees regardless of balance. For a complete overview of the account, see the American Express High Yield Savings guide.
AmEx HYSA Balance Requirements
| Requirement | Amount |
|---|---|
| Minimum balance | $0 |
| Opening deposit | $0 |
| Balance to earn APY | $0.01+ |
| Monthly fee | $0 |
| Low-balance fee | None |
| Account closure for low balance | No |
| Rate tiers | None — flat APY for all balances |
No minimum means no risk of fees eating into small balances, no scrambling to fund the account before month-end, and no barriers to getting started.
What “No Minimum Balance” Actually Means
Most traditional bank savings accounts penalize you for keeping a low balance. Chase Savings, for example, charges a $5/month fee unless you maintain $300 or more. With American Express High Yield Savings, that pressure disappears entirely.
Three things “no minimum” means in practice:
- You can open with $0 — link your external bank account, open the AmEx account, and deposit whenever you’re ready. The account stays open with no balance.
- No fee if your balance dips — if you pull out all your savings for a car repair or emergency, the account won’t charge you while it rebuilds.
- Flat APY on any amount — a $200 starter fund earns the same 4.00% rate as a $50,000 nest egg. There are no tiered rates rewarding larger balances.
How Interest Grows on a Small Starting Balance
Even a modest starting balance earns meaningfully at 4.00% APY — far more than a traditional bank savings account (national average: ~0.45% APY in 2026).
| Starting Balance | AmEx HYSA (4.00% APY) | Big-Bank Savings (0.45% APY) | Extra Earned |
|---|---|---|---|
| $500 | $20.00/yr | $2.25/yr | +$17.75 |
| $1,000 | $40.00/yr | $4.50/yr | +$35.50 |
| $5,000 | $200.00/yr | $22.50/yr | +$177.50 |
| $10,000 | $400.00/yr | $45.00/yr | +$355.00 |
| $25,000 | $1,000.00/yr | $112.50/yr | +$887.50 |
Worked example: If you open an AmEx HYSA with $1,000 and add $200 per month, after 12 months your balance would be roughly $3,400 and you’d have earned about $80 in interest that year — all at a rate you couldn’t get at a traditional bank, with no minimum balance hanging over your head.
Interest compounds daily and is credited to your account monthly. You’ll see the interest hit your balance on the last business day of each month.
AmEx HYSA vs Competitors: Minimums Compared
All major online banks have eliminated minimum balance requirements for savings accounts. American Express is consistent with this trend — but its 4.00% APY is competitive even without a rate edge from tiering.
| Institution | Min Balance | Monthly Fee | APY (2026) |
|---|---|---|---|
| AmEx High Yield Savings | $0 | $0 | ~4.00% |
| Marcus by Goldman Sachs | $0 | $0 | ~4.10% |
| Ally Online Savings | $0 | $0 | ~4.00% |
| Synchrony High Yield Savings | $0 | $0 | ~4.50% |
| SoFi Savings (with direct deposit) | $0 | $0 | ~4.20% |
For a direct side-by-side, see AmEx vs Marcus and AmEx vs Ally.
What Happens If Your Balance Drops to $0?
Nothing bad. Your account stays open, your bank link stays connected, and no fees are charged. You can resume depositing whenever you’re ready. American Express does not automatically close accounts for inactivity or low balances, though prolonged dormancy policies may apply after several years with no activity (varies by state law).
If you want to close the account intentionally, there is no account closure fee either.
Does the No-Minimum Apply to AmEx CDs Too?
The no-minimum rule applies specifically to the High Yield Savings Account. American Express also offers CDs (certificates of deposit) with competitive rates — see the AmEx CD rates guide for current terms and APYs. CD minimum deposits may differ; confirm before opening.
How to Open AmEx High Yield Savings With $0
- Visit americanexpress.com/savings or the Amex app
- Select “High Yield Savings” and click “Open Account”
- Provide your Social Security number, address, and ID
- Link an external checking account (instant or micro-deposit verification)
- Deposit $0 or any amount to fund — your choice
- Account is typically active within 1–2 business days
No minimum means step 5 is entirely optional at opening. You can deposit $10 or $10,000 — or nothing at all — and the account is live either way.
FDIC Protection Applies at Any Balance
American Express High Yield Savings is held at American Express National Bank, which is FDIC-insured. Your deposits are protected up to $250,000 per depositor per ownership category — even if your balance is just $50. FDIC coverage is not tied to a minimum balance.
For more on the account’s full feature set, see the American Express savings review or check current interest rates on the AmEx savings rate page.
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