Debt Payoff Goal Calculator

Enter your debt balance, APR, and how many months you want to take to pay it off. The calculator uses the standard loan amortization formula to find the exact monthly payment required. Use the comparison table to see how paying a bit more or less changes your timeline and total interest cost.

Required Monthly Payment
$381.68
Total Interest
$1,660.37
Total Paid
$9,160.37
Debt-Free Date
June 2028

What if I pay more or less?

TimelineMonthly PaymentTotal Interest
18 months$485.69$1,242.38
21 months$426.18$1,449.84
24 months ★$381.68$1,660.37
27 months$347.18$1,873.93
30 months$319.68$2,090.54

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How It Works

The calculator solves for the monthly payment P using the standard loan amortization formula:

P = B × r / (1 − (1+r)^−n)
  • B = balance
  • r = monthly interest rate = APR / 1,200
  • n = number of months

Example: $7,500 at 19.99% APR in 24 months — monthly rate = 0.01666, P = 7,500 × 0.01666 / (1 − (1.01666)^−24) = 124.95 / (1 − 0.6693) = 124.95 / 0.3307 = $377.83/month. Total interest = (377.83 × 24) − 7,500 = $1,567.92.

Real-World Example

James has $7,500 in credit card debt at 19.99% APR. He wants to be debt-free in 24 months. Required payment: $377.83/month. Total interest: $1,567.92. Total paid: $9,067.92.

If he stretches to 36 months, the payment drops to $278.55/month but total interest rises to $2,527.80 — $960 more. The comparison table makes this trade-off immediately visible.

Why Set a Debt-Free Goal Date?

  • Concrete goals outperform vague intentions — a specific date creates accountability.
  • Knowing the exact payment turns a goal into a bill: you budget for it like any fixed expense.
  • Working backward from a target date reveals whether it is realistic given your current cash flow.

Frequently Asked Questions

How do I calculate the monthly payment to pay off debt by a specific date?

Use the formula: P = B × r / (1 − (1+r)^−n), where B = balance, r = APR divided by 1,200, and n = number of months. For $10,000 at 20% APR in 36 months: r = 0.01667, P = 10,000 × 0.01667 / (1 − (1.01667)^−36) = 166.7 / 0.4545 = $366.86/month.

What if I can't afford the required payment?

Extend your timeline — the comparison table shows how monthly payments drop with more months. Or look for ways to reduce the balance first: a balance transfer to a lower APR card, a debt consolidation loan, or a windfall applied to the principal.

How much does adding 6 months to my timeline cost in extra interest?

It depends on your APR and balance. For a $7,500 balance at 20% APR: paying over 24 months costs about $1,650 in interest; 30 months costs about $2,050. The extra 6 months adds roughly $400 in interest in this example.

Is it better to pick an aggressive or conservative timeline?

Aggressive timelines minimize total interest but require higher monthly cash flow. Use the comparison table to find a monthly payment amount that is sustainable without stress. A payment you can consistently make beats a higher payment you'll skip.

Does this calculator assume I stop using the card?

Yes. The formula assumes a fixed balance that only decreases with payments. If you continue using the card, the required payment will be understated. For best accuracy, stop new charges before using this tool.

What if my APR changes during the payoff period?

This calculator uses a fixed APR throughout. Variable-rate cards may change APR periodically. If your rate increases, your actual payoff will take longer than shown. Consider refinancing to a fixed-rate option if rate stability is important.

Can I use this for student loans or personal loans?

Yes. The payment formula is the same for any installment loan with a fixed balance, rate, and term. Just enter your loan balance, annual interest rate, and target number of months.

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