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Credit Card Interest Calculator — See Your True Cost

Calculate exactly how much interest you pay each month and year on your credit card balance — and see the total cost of carrying that debt over time at any APR.

Quick answer: Credit card interest is usually calculated from average daily balance and APR. Carrying a balance compounds quickly, so even small extra payments can reduce total interest.

First-Year Interest at Current Payment
$1,076
First-Year Interest at Current Payment
$1,076
Monthly Interest Charge
$96
Months to Pay Off
54
Total Interest Paid
$3,100
Diagnostic

Over the life of this loan, you pay $3,100 in interest.

That's the cost of borrowing on top of what you actually got.

See current rates
What to do next

Explore balance transfer options

Your action plan
  1. 1

    Calculate the baseline result with your current numbers

    See the true annual cost of carrying a credit card balance.

  2. 2

    Pressure-test one alternate scenario before deciding

    Assumptions change the answer, especially when rates, taxes, or timing matter.

  3. 3

    Save the result to Money Map or use the linked next action

    Turn the result into a prioritized action instead of treating it as a one-off number.

Explore balance transfer options

This is an educational estimate, not tax, legal, investment, or lending advice. Tax rules, rates, and eligibility change and depend on your full situation. Confirm with a qualified professional or the provider before acting.

Calculator action path

Turn this result into a decision

Every SwitchWize calculator connects to a product comparison, rate context, guidance, alerts, and Money Map.

Rate authority hub
Compare
Explore balance transfer optionsMove from calculation to current product options.
Rate Trend
Track card aprsUse market context before you decide when to act.
Guide
Your Credit Card APR Was Never Waiting for the Fed. The Fed's Hold Confirmed It.Card rates barely move when the Fed cuts, and the Fed just removed the cut anyway. If you are carrying a balance at the average 24% APR, the relief you were waiting for is not coming. The lever that actually works is still sitting on the table.
Money Map
Add this scenario to Money MapTurn the result into a saved opportunity or plan item.
Alert
Create a rate alertWatch the market instead of checking manually.
Top card picks

Reviewed Jul 9, 2026 · Methodology

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Advertising disclosure: SwitchWize may earn a referral fee if you open an account through a link above. This does not affect our rankings. Ranked using the SwitchWize methodology. Learn more

Frequently Asked Questions

Everything you need to know.

How do I find my credit card APR?
Your APR is on every monthly statement, usually labeled 'Purchase APR' or 'Variable APR'. You can also find it in your cardmember agreement. The average purchase APR in 2026 is over 21% — far above any savings rate.
Is the Credit Card Interest Calculator — See Your True Cost free to use?
Yes. SwitchWize calculators are free, and you do not need an account to run scenarios or view the result.
Does using the Credit Card Interest Calculator — See Your True Cost affect my credit score?
No. Using a calculator does not trigger a credit check. A credit impact can occur only if you apply directly with a lender, card issuer, or provider.
Are the results personalized financial advice?
No. Calculator outputs are educational estimates based on the inputs you enter. Review assumptions and confirm terms directly with providers before making a financial decision.
What should I do after seeing the result?
Use the recommendation module on this page to explore balance transfer options, or run Money Map to compare this debt payoff decision with your other opportunities.
How does SwitchWize choose related offers?
Related offers are matched by the calculator surface (cards) and ranked using SwitchWize data such as rate, fees, trust signals, product fit, and switching friction. Paid relationships do not change organic ranking order.
How fresh are the rates and offers shown?
Rate and offer data is reviewed on a recurring cadence and every offer module shows review context or links to the methodology and disclosure pages.
Where can I see the ranking methodology?
The SwitchWize methodology page explains how rate freshness, editorial review, affiliate disclosure, and category ranking factors work.
Can Money Map use this result?
Yes. Money Map is the broader diagnostic path: it compares savings, mortgage, cards, and debt so you can see whether this calculator result is your highest-impact next move.

Why This Matters

Credit card interest compounds daily. A $3,000 balance at 24% APR costs $720/year in interest — money that funds the bank, not your future. Seeing the real number motivates action.

How to Use It

  1. 1Enter your current balance
  2. 2Enter your APR (shown on your statement)
  3. 3See your monthly and annual interest cost
  4. 4See how much you save by paying down the balance
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