Credit cards guides

Glisten's credit card guides explain how cards work before you pick one. They cover how interest is charged, what balance transfers and intro rates cost, how rewards and fees add up, and which kinds of cards fit your credit, using Regulation Z, the CFPB and issuers' own terms. Two calculators show what paying off a balance, or moving it to a new card, would cost.

22.36%average APR on card accounts paying interest, August 2026 (Federal Reserve)Sources in this guide

6 monthsshortest an intro APR can last, unless you're more than 60 days lateSources in this guide

1 in 4people eligible for a sign-up bonus missed its requirements (CFPB)Sources in this guide

Up to 10 yearsa card closed in good standing can stay on your reportSources in this guide

How does credit card interest work?

Interest is charged on your average daily balance at a daily rate, and the Federal Reserve put the average APR on accounts paying interest at 22.36% in August 2026. Paying the full statement balance by the due date usually avoids it.

How credit card interest works: APR, daily rate and grace periodHow issuers turn your APR into a daily rate, when interest starts, how the grace period works, and the penalty APR rules in Regulation Z. With a worked example.Credit card minimum payments: how they're set and what they costHow issuers set your credit card minimum payment, what the Minimum Payment Warning on your statement means, and what paying only the minimum costs on $5,000.Credit card payoff calculator: months to pay off and total interest (2026)See how long a credit card takes to pay off and what it costs in interest, the payment to clear it by a date, and what paying only the minimum really costs.

Is a balance transfer worth it?

A transfer can cut interest while the intro rate lasts, but you'll usually pay a fee, typically 3% to 5%. Under federal rules an intro rate has to last at least six months unless you're more than 60 days late.

How balance transfers work: fees, intro APRs and the fine printHow a credit card balance transfer works: the 3% to 5% fee, how long intro rates must last, where your payments go, and what happens when the intro period ends.0% intro APR explained, and how it differs from deferred interestA 0% intro APR charges no interest during the promotion. Deferred interest can bill all of it back. How to tell them apart, plus the six-month and 60-day rules.Balance transfer calculator: fee, interest saved and what's left after the intro (2026)Compare a balance transfer with staying on your current card: the fee, the interest you'd save, and how much you'd still owe when the intro APR ends.

Which kind of rewards card fits how I spend?

Cash back pays a set amount. Points and miles are worth whatever the issuer says for each way you redeem them, and the CFPB found about one in four people eligible for a sign-up bonus missed its requirements.

Cash back vs points vs miles: how each credit card reward worksHow cash back, points and miles work, flat vs tiered vs rotating categories, why a point is worth what the issuer says, and which reward type fits whom.Credit card sign-up bonuses: how welcome offers work and how you lose oneHow card welcome offers work: spend requirements, issuer eligibility rules, clawbacks, taxes and what applying for many cards does to your score.Credit card annual fees: when they're charged, the first-year cap and the break-even mathWhat a card's annual fee is, when it posts, where it's disclosed, the CARD Act's 25% first-year fee cap, break-even math, and downgrading vs closing.

Which cards fit my credit?

Issuers label cards by the credit they're aimed at, and federal rules make them check you can afford the payments. With thin or damaged credit, a secured card or being added as an authorized user are two ways to start.

Which kinds of credit cards fit your credit score bandWhat issuers' credit-level labels mean, which card types match each FICO band, how soft-inquiry check tools work, and the ability-to-pay and under-21 rules.How secured credit cards work: the deposit, reporting and getting it backHow a secured card's deposit sets your limit, which bureaus hear about it, how issuers move you to an unsecured card, and when you get the deposit back.Student credit cards: the under-21 rule and how to build credit in collegeUnder 21, you need your own income or a cosigner 21 or older to open a card. What income counts, campus marketing rules and building credit as a student.Authorized users on a credit card: how it works, credit reports and the risksHow authorized users work, whether the card shows on their credit report, how FICO counts it, risks for both people, minimum ages and how to remove one.

What happens if I miss a payment or close a card?

A late payment brings a fee, and once you're more than 60 days late the issuer can apply a penalty rate. A card closed in good standing can stay on your report for up to 10 years.

Missed a credit card payment? What happens, day by dayA late fee first, a credit report mark at 30 days, a possible penalty APR at 60, a charge-off around six months. What each step means and what you can ask for.Credit card fees explained: the rule behind each one (2026)Late, foreign transaction, cash advance, balance transfer, returned payment, over-limit and annual fees, and the Regulation Z rule that limits each one.How credit card limits work: how they're set, raised and cutHow issuers set credit limits, whether asking for more means a hard pull, automatic increases, the notice you get when a limit is cut, and over-limit fees.Closing a credit card: what it does to your credit, and how to do itClosing a card can raise utilization right away. A closed card in good standing can stay on your report up to 10 years. How to close one, and the alternatives.Credit card cash advances: how they work and what they costA cash advance means a fee, usually a higher APR and interest from day one, with no grace period. How it works, convenience checks, and what to try first.

Work out how long a balance takes to pay off

Glisten tool · Credit card payoff calculator

Card balance ($)APR (%)I want toMonthly payment ($)

— to pay off

Enter a balance and an APR from 0 to 100%.

Estimates only. Interest here is worked out monthly (APR ÷ 12). Your issuer charges it daily, so its figures will differ a little. The grey example figures are illustrations, not rates offered to you. This runs in your browser, and nothing you type is sent anywhere or saved.

Frequently asked questions

What is the average credit card interest rate?

The Federal Reserve put it at 22.36% in August 2026 for accounts paying interest. See how credit card interest works.

How long does a 0% intro APR have to last?

At least six months under federal rules, unless you're more than 60 days late. See 0% intro APR explained.

Does closing a credit card hurt my credit?

It can raise your utilization, since you lose that card's limit. A card closed in good standing can stay on your report for up to 10 years. See closing a credit card.

Does Glisten issue credit cards?

No. Glisten doesn't issue cards or make credit decisions. Our guides explain how cards work, using the rules and the issuers' own terms.