Very few banks sell a 1-month CD. None of the banks whose CD pages we read in October 2026 showed a 1-month term, so this page lists no bank rates. The FDIC’s national average rate for a 1-month CD was 0.23% as of September 21, 2026, which is an average across banks, not a top rate. On $10,000 at that average, a month earns about $2.
What a 1-Month CD Earns
The table is a calculation at example APYs, not offers from any bank.
| Deposit | At 4.00% APY | At 4.50% APY |
|---|---|---|
| $5,000 | $16 | $18 |
| $10,000 | $33 | $37 |
| $25,000 | $82 | $92 |
| $50,000 | $164 | $184 |
| $100,000 | $327 | $367 |
Interest = deposit x ((1 + APY)^(1/12) - 1), assuming the APY is earned for the month. The dollar amounts are small, so a 1-month CD matters most when you have a specific date 30 days out.
Alternatives for 30-Day Money
- A savings account or money market account pays a variable rate with no lockup. The FDIC national average was 0.37% for savings and 0.63% for money market accounts as of September 21, 2026.
- A 4-week Treasury bill pays interest that is exempt from state income tax; check the current yield at TreasuryDirect.gov.
- A 3-month CD, which more banks offer; see 3-month CD rates.
Early Withdrawal Penalties
Banks charge interest for withdrawing before maturity, and the amount depends on the bank and term. Examples from bank pages: Ally charges 60 days of interest on a CD of 3 to 24 months (30 days under 3 months; 90 days for 25 to 36 months, 120 for 37 to 48, 150 for 49 or more); Capital One charges 3 months of interest on terms of 12 months or less and 6 months on longer terms; Synchrony charges 90 days of simple interest on terms of 12 months or less, 180 days on more than 12 but under 48 months, and 365 days on 48 months or more. We could not read penalty schedules for the other banks, so check the account agreement.
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