Credit Card Interest Guides
Plain-language explainers on how credit card interest actually works, and what to do about it. Start with the basics, or jump to what applies to you.
How Is Credit Card Interest Calculated?
Start here if you're new: the daily periodic rate, the average daily balance method, the grace period, and how to pay less, all in one guide.
Start with the basicsHow interest actually works
How to Avoid Credit Card Interest
Use the grace period, pay your full statement balance, and handle cash advances, balance transfers, and a carried balance.
Read the guideWhen Does Credit Card Interest Actually Start?
How the grace period works, what breaks it, and how to make sure you never pay a cent of it, explained for a first card.
Read the guideTypes of Credit Card APR
Purchase, cash advance, balance transfer, penalty, and introductory rates, plus fixed vs. variable APR.
Read the guideWhat Is a Penalty APR?
What triggers it, how high it goes (up to 29.99%), and how to get your normal rate back after six on-time months.
Read the guide0% Intro APR and Deferred Interest
How a 0% introductory APR works, what happens when it ends, and why deferred interest on store cards is a riskier deal.
Read the guideAverage Credit Card APR (and Is Yours High?)
The average U.S. credit card APR is about 21% (Federal Reserve, Q2 2026). What counts as high, and how to compare yours.
Read the guideGetting out of debt
How to Pay Off Credit Card Debt
Build a plan, choose avalanche or snowball, pay above the minimum, weigh a balance transfer, and run the numbers.
Read the guideDebt Avalanche vs Snowball
The avalanche method saves the most interest; the snowball builds motivation with quick wins. Which saves more, and how to choose.
Read the guideHow to Lower Your Credit Card Interest Rate
When to ask, how to prepare, a word-for-word script to call your issuer, and what to do if they say no.
Read the guideBalance Transfer vs. Personal Loan vs. Credit Counseling
Three real ways out from under high-APR debt, compared on cost, credit needed, speed, and risk.
Read the guideWhat Happens After a Credit Card Charge-Off?
A charge-off doesn't erase the debt. What it actually means, how long it stays on your report, and where to get real help.
Read the guideSituations and questions
Business Credit Cards Don't Have These Protections
Business cards are exempt from the CARD Act and most of the Fair Credit Billing Act. What's actually different, and what to do about it.
Read the guideIs Credit Card Interest Tax Deductible?
For personal purchases, no, it hasn't been since 1986. Here's why, and what interest still qualifies.
Read the guideIs Business Credit Card Interest Tax Deductible?
Generally yes, if the charge was a legitimate business expense. Here's exactly where the line falls.
Read the guideThe Proposed Credit Card Interest Rate Cap, Explained
A 10% cap has been proposed, but not passed. The current status, and what your card would cost under it.
Read the guide