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Credit Cards Payoff Calculator

Combine three card balances and payment assumptions to estimate total interest and the longest payoff period.

Credit Cards Payoff Calculator Inputs

Enter a non-negative balance.

Results computed instantly — your data never leaves your device.

Live Credit Cards Payoff Calculator Results

Real-Time

Combined Monthly Payment

$575

3 cards simulated

Combined Interest

$11,701.61

Total Balance

$19,500

Longest Payoff (months)

58

Primary 4.7%Other 95.3%
100% Client-SidePrivate & Secure

How to Use the Credit Cards Payoff Calculator

  1. 1

    Enter the balance, APR, and payment for Card 1.

  2. 2

    Enter Card 2 and Card 3 balances; their planning rates and minimum assumptions are shown in the model.

  3. 3

    Review combined balance, combined payment, total interest, and longest payoff period.

  4. 4

    Use the results to compare a multi-card payoff plan before checking each issuer statement.

Formula & Mathematical Basis

Total Balance = Σ Balance_i | Total Interest = Σ Interest_i | Longest Payoff = max(Payoff Months_i)

Variable Key

i

Card index from 1 through 3

Balance_i

Starting balance for card i

Interest_i

Modeled interest for card i

Payoff Months_i

Modeled payment count for card i

📝 The three simulations are independent and use fixed payment assumptions. New charges, fees, transfer events, and payment reallocation are excluded.

Step-by-Step Examples

1

Three-card planning view

Scenario: Card 1 $12,000 at 22.99% with $350 payment, Card 2 $5,000, and Card 3 $2,500.

  1. 1.Simulate Card 1 with its entered APR and payment.
  2. 2.Simulate Cards 2 and 3 with the component’s planning assumptions.
  3. 3.Add the three starting balances and modeled interest totals.
  4. 4.Take the largest payoff-month count as the longest payoff.
✅ The dashboard provides one combined view while retaining the cards as independent simulations.
2

Payment adequacy check

Scenario: A card payment is lower than the interest generated by its balance.

  1. 1.Calculate the first monthly interest for that card.
  2. 2.Compare it with the planned payment.
  3. 3.Flag that card as payment-too-low when payment cannot reduce principal.
  4. 4.Do not present a false payoff period.
✅ The dashboard warning identifies that the payment assumption must increase.

Practical Use Cases

  • ✓ See the size of several card balances in one dashboard.
  • ✓ Compare total modeled interest across the cards.
  • ✓ Identify the card with the longest payoff period.
  • ✓ Check whether a payment assumption can reduce principal.
  • ✓ Prepare questions for card issuers or a debt counselor.

Common Pitfalls

  • ⚠ Assuming the model automatically performs avalanche or snowball allocation.
  • ⚠ Omitting a card balance or using an outdated APR.
  • ⚠ Treating combined payment as a single lender payment.
  • ⚠ Ignoring new purchases, fees, and promotional expirations.
  • ⚠ Using a planning model as a statement reconciliation.

Frequently Asked Questions

How many cards does this version combine?

The calculator combines three card balances. Card 1 accepts balance, APR, and payment inputs; Cards 2 and 3 use their entered balances with planning assumptions in the client-side model.

What does longest payoff mean?

Each card is simulated separately. Longest payoff is the largest payment count among the three cards, so all balances are projected to be cleared by that point under the model.

Does it model avalanche or snowball ordering?

No. This version sums independent fixed-payment simulations. It does not reallocate a paid-off card payment to another card.

Can a card return payment-too-low?

Yes. The combined view flags the plan when a card payment cannot cover its modeled monthly interest.

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