Your first card statement is in. It lists a statement balance, a minimum payment and a due date, and your card app shows a current balance that's higher. You're about to pay. What you pay, and by when, decides whether your purchases cost interest.
On a card with a grace period, paying the full statement balance by each due date keeps purchases interest-free; leave even $1 unpaid and new purchases usually start costing interest.
How many days without interest does a purchase get?
A grace period is the time between the end of a billing cycle and the payment due date. Card companies don't have to offer one, but most cards give one on purchases, the CFPB says. So a purchase can go without interest for the rest of its billing cycle plus the grace period. The earlier in the cycle you buy, the more days you get.
Example: your billing cycle runs from February 16 to March 15, and your payment is due April 5, 21 days after the close.
- A purchase on February 16, the first day of the cycle, goes 48 days without interest, to April 5.
- One that posts on March 15, the closing date, gets only the 21-day grace period.
- If you weren't carrying a balance, both cost $0 in interest when you pay the full statement balance by April 5.
- Your billing cycle runs from February 16 to March 15, and your payment is due April 5, 21 days after the close.
- A purchase on February 16, the first day of the cycle, goes 48 days without interest, to April 5.
- One that posts on March 15, the closing date, gets only the 21-day grace period.
On a card with a grace period, when you pay the full statement balance by each due date.
Source: CFPB, What is a grace period for a credit card? (last reviewed September 23, 2024).
Those days aren't extra money: put a purchase on the card only when the money to pay for it is already set aside. Statement Cycle Mechanics covers which balance gets reported; statement closing date vs due date covers how the two dates are set.
What happens if I leave $1 unpaid?
Example: your March 15 statement balance is $300. By April 5 you pay $299 and leave $1. Say your card's APR is 22.36%, the average rate on bank credit card accounts that were charged interest in August 2026 (Federal Reserve, preliminary).
- The $1 is charged interest: about 2 cents a month ($1 × 22.36% ÷ 12).
- You lose the grace period, so purchases in the new billing cycle are charged interest from the day you make each one. A $200 purchase on March 20 starts costing interest that day: about $3.73 a month ($200 × 22.36% ÷ 12).
- Paying the full $300 by April 5 would have kept both at $0.
To get the grace period back, pay your latest statement balance in full by its due date. The CFPB says that typically restores it, but warns you may lose it for the month you don't pay in full and for the month after.
Does every balance on my card get a grace period?
No. Grace periods typically apply only to purchases, the CFPB says.
- Cash advances: interest generally starts on the day you take the cash.
- A balance you carry, even a 0% balance transfer or a deferred-interest purchase: on most cards, new purchases then get no grace period. They're charged interest from the day you make them unless you pay the entire balance by the due date. Keep everyday spending off a card that carries one.
Before you accept a "no interest" offer, check which kind it is:
| How the offer reads | If a balance is left when it ends |
|---|---|
| "0% intro APR" for a set period | interest starts on what's left, from then on |
| "No interest if paid in full" by a date | you owe all the interest back to the purchase date |
Balance transfers often carry a fee too, even at 0%; weigh it against the interest you'd save.
What can I do today?
Open your latest statement and find "Interest Charged": federal rules require it to list interest by type of transaction (where a statement shows interest).
- If you see interest on purchases: pay the full statement balance by this due date. If you can't, pay at least the minimum and as much more as you can.
- If you see none: keep it that way. Autopay the full statement balance; if your checking account can't always cover it, autopay at least the minimum and pay the rest by the due date.
Which amount keeps your purchases interest-free?
Your card has a grace period. Your statement balance is $300; your current balance is $420. What must you pay by the due date to keep purchases interest-free?
- A. $299, all but $1
- B. $300, the statement balance ✅
- C. $420, the current balance
Why: paying the full statement balance by the due date keeps the grace period; $299 loses it, and the other $120, charged since the statement closed, is due with the next statement.
Where do these facts come from?
- CFPB — What is a grace period for a credit card? (last reviewed September 23, 2024) · Checked October 24, 2026
- Federal Reserve — G.19 Consumer Credit (October 7, 2026): credit card plans, accounts assessed interest, August 2026 (preliminary) · Checked October 24, 2026
- CFPB — The Consumer Credit Card Market (December 2025): footnote 245; §7.4 Balance transfers, p. 161 · Checked October 24, 2026
- CFPB — Do I pay interest on new purchases after I get a zero or low rate balance transfer? (last reviewed January 22, 2024) · Checked October 24, 2026
- CFPB — I got a credit card promising no interest for a purchase if I pay in full within 12 months. How does this work? (last reviewed January 22, 2024) · Checked October 24, 2026
- Experian — Statement Balance vs. Current Balance: What’s the Difference? (August 6, 2026) · Checked October 24, 2026
- eCFR — Regulation Z, 12 CFR 1026.7: Periodic statement (up to date as of October 22, 2026): paragraphs (b)(6)(ii), interest charged, and (b)(13), the due date, ending balance and minimum payment · Checked October 24, 2026
- eCFR — Regulation Z, 12 CFR 1026.16: Advertising (up to date as of October 22, 2026): paragraphs (g), promotional rates, and (h), deferred interest offers · Checked October 24, 2026