How a credit card cycle works
The whole system runs on one billing cycle. Learn these few terms once and the rest of CardLab, along with your real statements, starts to make sense.
Grace period · interest-free if paid in full
Day 1
Statement date
Your bill is calculated and the balance is frozen.
Days 2 to 24
Grace window
New purchases stay interest-free, as long as you pay in full.
Around day 25
Due date
Pay the statement balance to keep grace alive.
Start with the two dates that matter most:
Every term, in one place
The two key dates
- Statement date
- The day your bill is calculated. Everything up to this day is totaled into a “statement balance,” and your reported utilization is usually measured here too.
- Due date
- The deadline to pay your statement. Pay at least the minimum to stay current; pay the full statement balance to keep your purchases interest-free.
- Grace period
- The interest-free window on new purchases. You keep it only if you paid your last statement balance in full by its due date.
What you owe
- Statement balance vs. current balance
- Your current balance is everything you owe right now. Your statement balance is the amount frozen on the cutoff date, and it’s the number interest and “pay in full” are based on.
- Minimum payment
- The smallest amount you can pay to stay current. It’s designed to be small, often mostly interest and fees.
- Credit limit & utilization
- Your limit is the most you can borrow. Utilization is your balance ÷ limit, usually measured at the cutoff. Lower is generally seen as healthier.
What it costs
- APR & interest
- APR is the yearly interest rate. CardLab applies it with the average daily balance method: a daily rate is charged on each day’s balance, then added up across the cycle.
- Cash advance
- Borrowing cash against your card. It usually has an upfront fee, no grace period, and a higher APR, so interest starts on day one.
- Rewards vs. interest
- Cashback, points, and miles are real value, but only if interest and fees don’t erase them.