Credit & Debt

What is Interest Charge?

An interest charge is what you pay to carry a balance on a credit card. It's calculated using your APR and your average daily balance. Credit card interest is typically compounded daily.

Most cards offer a grace period—the time between your statement closing and the due date. Pay your full balance by the due date and you won't pay interest on new purchases. Carry a balance and the grace period disappears; interest starts accruing daily on everything.

Under the CARD Act, lenders must clearly show how interest is calculated on your statements. Credit card rates are often variable, tied to the Prime Rate, and can go up if you fall behind on payments.

Quick Facts

Grace Period RuleWaives interest if the balance is paid in full monthly

Calculation StandardDaily periodic rate multiplied by average daily balance

Variable Rate BenchmarkOften tied to the U.S. Prime Rate

Penalty Rate TriggerOccurs when payments are over 60 days late

PRACTICAL EXAMPLE

A consumer carries a $2,000 balance on a credit card with a 24% APR (daily periodic rate of 0.0657%). The average daily balance is $2,000, resulting in an interest charge of $40 for that month ($2,000 × 0.0657% × 30).

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RELATED TERMS

Learn More Key Concepts

Credit ScoreA three-digit number that tells lenders how likely you are to repay borrowed money.

APRA broader measure of the cost of borrowing mortgage money, incorporating the interest rate, broker fees, and closing costs.

Minimum PaymentThe lowest amount a borrower must pay on a credit account each month to keep the account current and avoid late fees.

Balance TransferThe process of moving outstanding debt from one credit card to another, typically to secure a lower interest rate.

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Disclaimer: NetWorthFlow provides financial calculators, simulators, and projection tools for informational and educational purposes only. None of the calculations, data, or results displayed on this website constitute professional financial, investment, tax, or legal advice. All calculations are mathematical models based on user-supplied variables and general assumptions, which may not reflect real-world market outcomes. Always consult with a certified financial planner, licensed investment advisor, or qualified tax professional before making any financial decisions.

Automated tools are not a substitute for professional counsel. We strongly advise that you consult a qualified Certified Financial Planner (CFP®), Registered Investment Adviser (RIA), Certified Public Accountant (CPA), or legal expert before making significant decisions regarding taxes, mortgages, retirement planning, investments, or debt management.