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Credit Card Calculator

Estimate a credit-card minimum payment, payoff time, total payments, and interest from balance and APR.

Credit Card Calculator Inputs

Enter a non-negative balance.

Results computed instantly — your data never leaves your device.

Live Credit Card Calculator Results

Real-Time

First Minimum Payment

$240

167 payments under a fixed minimum model

Total Interest

$28,066.51

Total Payments

$40,066.51

Payments

167

Primary 0.8%Other 99.2%
100% Client-SidePrivate & Secure

How to Use the Credit Card Calculator

  1. 1

    Enter the current card balance and APR.

  2. 2

    Set the minimum-payment percentage and minimum dollar floor.

  3. 3

    Review the first minimum payment, projected payoff count, total payments, and interest.

  4. 4

    If the result warns that payment is too low, confirm the payment assumption before using the estimate.

Formula & Mathematical Basis

Minimum Payment = max(Balance × Minimum %, Minimum Floor) | Interest_t = Balance_t × APR ÷ 1,200 | Balance_(t+1) = max(0, Balance_t − (Payment − Interest_t))

Variable Key

Balance

Starting card balance

APR

Annual percentage rate converted to a monthly rate

Minimum %

Percentage of balance used for the first minimum-payment estimate

Minimum Floor

Dollar floor below which the minimum payment does not fall in the input model

📝 The repayment model holds the first calculated payment constant so users can compare the effect of an assumed minimum payment without adding new purchases or issuer-specific fees.

Step-by-Step Examples

1

Minimum percentage above floor

Scenario: $12,000 balance, 22.99% APR, 2% minimum, and $25 floor.

  1. 1.Percentage payment = $12,000 × 2% = $240.
  2. 2.The first minimum is max($240, $25) = $240.
  3. 3.Monthly interest is calculated from APR ÷ 1,200.
  4. 4.The simulation applies the assumed payment until payoff or a payment-too-low warning.
✅ The dashboard shows the first minimum payment and modeled payoff metrics.
2

Floor controls the payment

Scenario: $500 balance, 22.99% APR, 2% minimum, and $25 floor.

  1. 1.Percentage payment = $10.
  2. 2.The dollar floor is $25.
  3. 3.The first minimum is max($10, $25) = $25.
  4. 4.The payoff simulation uses the $25 assumed payment.
✅ $25 is the modeled first minimum before other issuer rules.

Practical Use Cases

  • ✓ Estimate how a balance behaves under a fixed assumed minimum.
  • ✓ Compare APR sensitivity on the same balance.
  • ✓ See the difference between a percentage minimum and a dollar floor.
  • ✓ Identify cases where payment does not cover monthly interest.
  • ✓ Review total interest rather than focusing only on the first payment.

Common Pitfalls

  • ⚠ Assuming the first minimum payment remains fixed on every issuer statement.
  • ⚠ Ignoring new spending and fees.
  • ⚠ Entering a promotional APR as the permanent rate.
  • ⚠ Confusing APR with the monthly rate used in the calculation.
  • ⚠ Treating a planning estimate as a credit-card contract.

Frequently Asked Questions

How is the minimum payment estimated?

The first payment is the greater of the entered balance multiplied by the minimum-payment percentage or the entered minimum dollar floor. The payoff simulation then keeps that payment fixed for planning purposes.

Does this model new purchases?

No. It models only the starting balance and the repayment assumptions entered. New purchases, late fees, changing APRs, and promotional periods are not added automatically.

What if the minimum payment is too low?

The calculator returns a payment-too-low status when the payment cannot cover monthly interest, instead of presenting a false payoff period.

Is this an issuer statement?

No. It is a client-side estimate for planning. Use the card agreement and current issuer statement for the actual minimum-payment rules.

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