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Module 3 of 7 12 min

How Credit Cards Work

Statements, grace periods, credit limits, and utilization.

Course lessons

Step 1

The lesson

A credit card is a revolving line of credit. You can borrow up to your credit limit, pay it back, and borrow again — as long as the account stays open.

  1. You make purchasesDuring the billing cycle (about a month), your purchases add up.
  2. The statement closesIt shows your statement balance, the minimum payment, and the due date.
  3. The grace periodBy law, the due date must be at least 21 days after your statement is sent. Pay the full statement balance by then and you usually pay no interest on purchases.
  4. You payPay in full, and you owe nothing more. Pay less, and interest is charged on what's left — and you may lose the grace period on new purchases too.

Common first cards: a student card, a secured card (you put down a deposit that becomes your limit), or being added as an authorized user on a parent's well-managed card.

Step 2

See it

A credit card billing cycle

Purchases add up during the billing cycle. The statement closes and a grace period of at least 21 days begins. By the due date, paying in full means no interest, paying the minimum means interest on the rest, and missing the payment means a late fee and possible penalty rate.

Purchases

During the billing cycle

Statement closes

Balance, minimum, due date

Due date

At least 21 days later

Pay in full

No interest on purchases

Pay the minimum

Interest on the rest

Miss it

Late fee, possible penalty APR

Step 3

Real-world example

Sam's first statement

Sam has a card with a $1,000 limit. This month's statement shows a balance of $240, a minimum payment of $25, and a due date 25 days away. Two choices:

  • Pay $240. No interest. The bureaus see a 24% utilization and an on-time payment.
  • Pay $25. The remaining $215 carries over. At a 24% APR, that's about $4.30 in interest next month — and new purchases may start charging interest right away.

A few dollars of interest doesn't sound like much. The habit is what gets expensive — which is the next lesson.

Step 4

Knowledge check

Answer each question, then check your answer to see the explanation. Retake it as many times as you like.

Question 1 of 3

ScenarioYour statement balance is $180 and the minimum payment is $25. You pay $180 before the due date.How much interest do you pay on those purchases?

Choose an answer.

Step 5

Summary

Credit cards are revolving credit: borrow up to a limit, repay, and borrow again. Each statement shows your balance, minimum, and due date. Pay the full statement balance by the due date and you usually pay no interest; pay less and interest starts. Keep utilization low and avoid cash advances.

Step 6

What you should remember

  • Pay the full statement balance and you usually pay $0 in interest.
  • Due dates are at least 21 days after the statement is sent.
  • Utilization = balance ÷ limit. Keep it low.
  • Cash advances cost a fee plus immediate interest.
  • Only charge what you already have.

Finished the lesson?

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