How do you avoid paying interest on a credit card?

Question

ClearValue Editorial Team · Accepted Answer

The only reliable way is to pay your full statement balance by the due date every month. That preserves your grace period — the interest-free window between statement date and due date — so no interest accrues on purchases. The grace period is at least 21 days (usually 25-30) between statement close and the due date, during which no interest accrues on the prior cycle's purchases. Pay the full statement balance and the grace period stays intact for the next cycle; pay anything less and it's lost, with interest accruing on the remaining balance and often retroactively on the cycle's purchases. Cash advances have no grace period — interest starts the day you take them, often at 25%+ — and balance transfers usually don't either, so verify whether a promotional 0% is genuinely 0% or merely deferred. A missed payment can trigger the penalty APR and wipe out the grace period, which is why autopay set to the full statement balance is the cleanest way to never pay purchase interest.