Topic · Credit cards
Credit card guides: interest, fees, balance transfers and credit building
Work out what a credit card really costs you: how interest is calculated, when an annual fee pays off, balance transfer math and how to build credit.
Start with how interest works, because it decides whether any card perk matters. The interest calculation guide shows how APR becomes a daily charge, and the minimum payment warning guide shows what paying only the minimum does to your payoff date. If you carry a balance from month to month, rewards are usually a secondary question.
Next, match the guide to your situation. Building or rebuilding credit: read the secured card and credit utilization guides. Paying down a balance: read the balance transfer cost guide and the deferred interest versus 0% APR guide before accepting a promotional offer. Paying in full each month: use the cash-back break-even guide to test whether an annual fee earns its place.
Travelers should finish with the foreign transaction fee guide, which shows how to estimate the cost of a trip on a card that charges one.
Guides and explainers
Credit cards · 6 min read
Balance-transfer offers: calculate the fee and the payoff deadline
How to tell whether a 0% balance transfer actually saves money: the fee, the monthly payment needed to finish in time, and the rules that can end the promotion early.
Credit cards · 5 min read
Cash-back annual fees: does the fee earn its place?
Work out the spending needed for an annual-fee rewards card to beat a no-fee card, and why carrying a balance changes the answer.
Credit cards · 6 min read
Read the minimum payment warning before you pay the minimum.
How to read the repayment box on a US credit card statement, why minimum payments stretch for years, and how to test a fixed payment instead.
Credit cards · 6 min read
"No interest if paid in full" is not the same as 0% APR.
Compare a deferred-interest store-card promotion with a true 0% intro APR, see how a small unpaid balance triggers back-dated interest, and plan the payoff date.
Credit cards · 8 min read
How credit card interest is calculated: APR, daily rate and average daily balance
Turn an APR into a daily periodic rate, compute an average daily balance, and see how one carried balance switches off the grace period on new purchases. Worked numbers you can redo with your own statement.
Credit cards · 6 min read
Credit utilization ratio: calculate it per card and overall
Compute utilization for each card and across all cards, see why paying in full can still report a high balance, and learn what closing a card does to the ratio. A two-card worked example.
Credit cards · 7 min read
Foreign transaction fees: what they cost on a trip and how to avoid them
How foreign transaction fees are charged on cards and debit cards, why paying in dollars at a foreign terminal can cost more, and a worked trip budget comparing card, debit and ATM costs.
Credit cards · 7 min read
How to choose a secured credit card: deposit, fees and the path to graduation
A checklist for comparing secured cards: deposit and credit line, annual and monthly fees, how and when the deposit comes back, reporting to all three credit bureaus, and whether the card can graduate to unsecured.
Credit cards · 11 min read
Credit card terms glossary: statement balance, grace period, penalty APR and more
About 40 terms from the rate table, the monthly statement and the cardholder agreement, each with a plain definition and a worked number. Sourced to CFPB pages and Regulation Z.
Credit cards · 8 min read
Pay the statement balance or the current balance? How the grace period decides
The statement closing date, due date and grace period explained with a dated timeline: what paying the statement balance, the current balance or less actually costs, and what to set autopay to. Sourced to CFPB pages and Regulation Z.
Credit cards · 7 min read
What a credit card cash advance really costs: a $500 example
The cash advance fee, the separate cash APR, the missing grace period and ATM operator fees, computed for $500 repaid after 1, 2 and 6 months, with the cheaper options to try first. Mechanics sourced to CFPB pages, Regulation Z and Regulation E.
Credit cards · 8 min read
Your first credit card: a first-year checklist for building credit without paying interest
A month-by-month plan for your first 12 months with a credit card: autopay, utilization targets in dollars, free credit report checks, and when a limit increase, product change or closing makes sense. Sourced to CFPB, FTC and Regulation Z.
Credit cards · 8 min read
Paying off a credit card in 12, 24 or 36 months: monthly payment and total interest
Payment and total interest tables for $3,000, $6,000 and $12,000 balances at the Federal Reserve's published average card rate and a higher example rate, plus how to put the plan into YNAB or Monarch and what to do if the payment does not fit.
Credit cards · 8 min read
Adding an authorized user: how it works and what it does to both credit reports
Who owes the debt when you add an authorized user, how the account can show up on their credit report (good and bad), how removal works, and a checklist before adding a teen or partner.
Credit cards · 9 min read
Disputing a credit card charge: how chargebacks work and the deadlines that matter
The Fair Credit Billing Act billing-error process step by step: the 60-day written notice, the 30-day acknowledgment and 90-day resolution limits, quality-of-goods claims, a letter checklist, and why debit card rules differ.