American Express High Yield Savings has no minimum balance and no minimum opening deposit. The full APY (reported at approximately 3.10% as of this review — confirm the current rate, since it’s variable) 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

Many traditional bank savings accounts penalize you for keeping a low balance — some charge a monthly fee unless you maintain a set minimum. With American Express High Yield Savings, that pressure disappears entirely.

Three things “no minimum” means in practice:

  1. 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.
  2. 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.
  3. Flat APY on any amount — a small starter balance earns the same rate as a large one. There are no tiered rates rewarding larger balances.

How Interest Grows on a Small Starting Balance

Illustrative example using a reported rate of approximately 3.10% APY (confirm the current rate before relying on this) compared against the FDIC’s national average savings rate:

Starting Balance AmEx HYSA (illustrative ~3.10% APY) National average savings rate (illustrative ~0.4%–0.6% APY)
$500 ~$15.50/yr ~$2–$3/yr
$1,000 ~$31.00/yr ~$4–$6/yr
$5,000 ~$155.00/yr ~$20–$30/yr
$10,000 ~$310.00/yr ~$40–$60/yr
$25,000 ~$775.00/yr ~$100–$150/yr

Figures are illustrative, based on an approximate rate — confirm the current AmEx HYSA APY and the current FDIC national average rate before relying on these numbers for a decision.

Interest compounds daily and is credited to your account monthly.

AmEx HYSA vs Competitors: Minimums Compared

Most major online banks have eliminated minimum balance requirements for savings accounts. American Express is consistent with this trend. Confirm each bank’s current APY directly on its own site before comparing — rates change frequently and a fixed comparison table quickly goes stale.

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

  1. Visit americanexpress.com/savings or the Amex app
  2. Select “High Yield Savings” and click “Open Account”
  3. Provide your Social Security number, address, and ID
  4. Link an external checking account (instant or micro-deposit verification)
  5. Deposit $0 or any amount to fund — your choice
  6. Account is typically active within 1–2 business days

No minimum means step 5 is entirely optional at opening. You can deposit any amount — 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.

WealthVieu
Written by WealthVieu

WealthVieu researches and writes data-driven personal finance guides using primary sources including the IRS, Bureau of Labor Statistics, Federal Reserve, and Census Bureau.

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