Credit cards, debt and interest explained

How interest and APR work

APR (annual percentage rate) is the yearly cost of borrowing. Credit cards typically divide it into a daily rate and charge it on your balance. Simple interest is charged only on the original amount; compound interest is charged on the balance plus interest that has already been added, which is why unpaid card balances can grow quickly.

Using credit cards well

Many cards offer a purchase grace period: when it applies, paying the full statement balance by the due date generally avoids purchase interest. Carrying a balance can cause you to lose that grace period, so new purchases may accrue interest too. Cash advances commonly start accruing interest immediately and may have separate fees. Check the card agreement; benefits and protections vary.

• Statement balance: what you owe at the end of the billing cycle.
• Minimum payment: the least you can pay to avoid a late fee - not the amount that avoids interest.
• Credit utilization: your balances divided by your limits; lower is generally better for credit scores.

Not all debt is the same

Debt with a low rate used for something that holds value or raises earning power can be reasonable. High-rate debt used for everyday spending is the most expensive kind to carry. The interest rate, the term and what the money paid for all matter.

Two proven payoff methods

Pay the minimum on every debt, then put every extra dollar toward one target. With the same payment budget and otherwise comparable terms, the avalanche method targets the highest interest rate first and generally minimizes interest. The snowball method targets the smallest balance first for faster early wins that can keep you motivated. Promotional deadlines, fees and secured debts can change the priorities.

Compare a lower-rate offer by total cost, not just the headline

A balance transfer or consolidation loan may reduce interest, but it does not erase debt. Compare transfer or origination fees, the promotional period, the rate afterward, and the total cost over the repayment term. A lower monthly payment may simply spread the debt over more years. Check whether the new borrowing puts an asset, such as your home, at risk.

Make a payoff plan before moving the balance, and avoid new spending that rebuilds it. If you are struggling to make a payment, contact the lender before the due date to ask about hardship options. Be cautious of companies promising to remove debt or demanding large advance fees.

Credit scores are not a reason to pay interest

Credit-scoring models vary, but payment history and the amount of available credit you use are important factors. The age of accounts, new applications and types of credit may matter too. You do not need to carry an interest-bearing balance to build a payment history.

A score is a lending tool, not a measure of your worth or your whole financial health. Review statements for errors and pay on time; if you use automatic payments, keep enough money in the payment account and still review each bill. Paying down balances can help utilization, but the timing of reported balances and the scoring model affect what you see.