Why does payoff show infinite?

Your payment doesn’t cover monthly interest. Increase the payment until a finite payoff appears.

Do fees or variable rates affect this?

Yes. This assumes a fixed rate and no fees. Add fees to balance and rerun or use a higher APR to approximate.

Billing cycle timing?

This adds whole months; actual dates may vary slightly by lender cycle.

Not modeled here. Increase the monthly payment to approximate extras or use a payoff calculator that supports varied payments.

Can I use this for mortgages?

Works for any fixed-rate debt but ignores escrows/fees; use mortgage-specific tools for taxes/insurance/PMI.

finance calculator

Debt Payoff Date Calculator

Find your payoff month and total interest for any debt based on balance, APR, and monthly payment.

Results

Months to payoff: 33.00
Estimated payoff date: 1972-10-01T00:00:00.000Z
Total interest paid: $4,563

Overview

This debt payoff date calculator helps you answer a question almost everyone with a loan or credit card asks at some point: "When will this finally be paid off?" By combining your current balance, annual percentage rate (APR), and monthly payment, it simulates repayment month by month and shows you how long payoff will take, what calendar date you can expect to be debt-free, and how much total interest you pay along the way.

It is especially useful for revolving debt like credit cards and personal loans where minimum payments or small fixed payments can stretch repayment out for many years. Instead of guessing based on your statement or trying to approximate in a spreadsheet, you can plug in a realistic payment amount and immediately see whether it is enough to make progress, how much sooner an extra payment would clear the balance, and how much interest you save by paying more than the minimum.

How to use this calculator

Enter your current balance (or a recent statement balance) in the Balance field.
Enter the interest rate as an annual percentage rate (APR %) from your loan or credit card agreement.
Enter the monthly payment you plan to make going forward. This can be your current payment, the minimum payment, or a higher amount you want to test.
Optionally enter a start date in YYYY-MM-DD format if you want a specific calendar payoff date; otherwise the tool assumes today.
Run the calculation and review the months to payoff, estimated payoff date, and total interest paid over the payoff period.
Experiment with higher or lower monthly payments to see how much faster you could become debt-free and how much interest you save by increasing your payment.

Inputs explained

Balance: The current outstanding principal on the debt you want to model. For a credit card, you can use the latest statement balance or a rounded amount close to what you owe today.
Interest rate (APR %): The annual percentage rate your lender charges on this debt, expressed as a percent (for example, 19.99). The calculator converts this to a monthly rate internally by dividing by 12.
Monthly payment: The amount you plan to pay each month toward this specific debt. It must be greater than the monthly interest charge in order for the balance to decline over time; otherwise, the balance will grow.
Start date (optional): The calendar date you want to treat as the beginning of the payoff period, in YYYY-MM-DD format. If left blank, the calculator uses today’s date and adds the payoff months to estimate your projected debt-free date.

How it works

The calculator converts your APR into a monthly interest rate by dividing the annual rate (as a decimal) by 12. For example, 19.99% APR becomes 0.1999 ÷ 12 per month.

Starting from your current balance, it computes interest for the first month by multiplying the balance by the monthly rate. That interest is added on top of the balance before your payment is applied.

Your monthly payment is then applied. It always covers interest first; whatever is left over reduces principal. If the payment is too small to cover the interest, the balance grows instead of shrinking (negative amortization).

The calculator repeats this process month after month, each time using the updated balance to compute new interest, apply the payment, and track the remaining principal.

The "Months to payoff" output is simply the number of monthly cycles required for the balance to reach zero (or effectively zero after a final partial payment).

If you provide a start date in YYYY-MM-DD format, the tool adds the payoff month count to that date to estimate a calendar payoff date. If you leave it blank, it assumes today as the starting point.

Total interest paid is the sum of all monthly interest charges across the payoff period. Comparing total interest under different payment amounts makes it easy to see the cost of stretching repayment versus paying more aggressively.

Formula

Let:\n• B₀ = starting balance\n• APR = annual percentage rate (decimal)\n• r = APR ÷ 12 (monthly rate)\n• P = monthly payment\n\nEach month i:\n1. Interestᵢ = Bᵢ × r\n2. Principal paymentᵢ = P − Interestᵢ\n3. New balance Bᵢ₊₁ = max(0, Bᵢ − Principal paymentᵢ)\n\nTotal interest = sum of all Interestᵢ until B reaches 0\nMonths to payoff = number of iterations until B = 0\nEstimated payoff date = Start date + (Months to payoff).

When to use it

Planning a realistic debt-free date for a high-interest credit card so you can see when it will be gone if you stick to a chosen payment.
Comparing different monthly payment strategies on a personal loan or line of credit, such as paying just above the minimum versus paying a more aggressive fixed amount.
Checking whether your current payment is high enough to avoid negative amortization, where interest charges are larger than your payment and the balance creeps upward.
Running what-if scenarios before a raise, bonus, or side-hustle income arrives, so you can decide how much extra to direct toward the debt and how much it accelerates payoff.
Coordinating multiple accounts when using the debt snowball or avalanche method by estimating the payoff date for a single account once you redirect extra funds to it.
Stress-testing balance transfer or promotional offers by plugging in the post-promo APR to see how quickly you would need to pay off any remaining balance when the teaser rate ends.

Tips & cautions

If the calculator reports an extremely large or effectively infinite payoff time, your monthly payment is too low to overcome monthly interest—try increasing the payment until you see a finite payoff month count.
Look at total interest, not just the monthly payment. A smaller payment may feel easier today but can add thousands in extra interest compared with a slightly higher payment.
Re-run the calculation after making lump-sum payments from bonuses, tax refunds, or other windfalls so that your payoff timeline stays up to date.
Consider pairing this calculator with a multi-debt strategy (snowball or avalanche) by using it on each account individually as you decide where to focus extra dollars.
Keep your APR input current—if your lender raises or lowers the rate, update the APR and rerun the numbers to keep your payoff date realistic.
Assumes fixed APR and fixed monthly payment; no fees or rate changes modeled.
Payoff date uses simple month addition; exact dates may vary by billing cycle.
If payment ≤ monthly interest, payoff is not possible (shown as infinite).

Worked examples

Example 1: $15,000 balance at 19.99% APR with a $600 payment

Balance B₀ = $15,000; APR = 19.99%; monthly rate r ≈ 0.1999 ÷ 12.
In month 1, interest ≈ $15,000 × r; the remainder of the $600 payment goes toward principal.
As the balance falls, interest each month gets smaller, and more of each payment reduces principal.
The calculator iterates month by month until the balance hits zero and reports the payoff months, payoff date, and total interest paid.

Example 2: Comparing $400 vs $600 monthly payments

Run the calculator once with a $400 payment and once with a $600 payment, keeping the same balance and APR.
The $600 payment shortens the payoff timeline and significantly reduces total interest compared with the $400 scenario.
This illustrates the trade-off between a higher payment today and interest savings over the life of the debt.

Example 3: Detecting a payment that is too low

Enter a high APR and a relatively small monthly payment, such as a minimum payment on a large revolving balance.
If the monthly payment barely covers interest, the calculator will show a very long or infinite payoff period.
This signals that you need to increase your payment or explore options like consolidation, negotiation, or balance transfers.

Deep dive

Use this debt payoff date calculator to see how many months it will take to eliminate a credit card, personal loan, or other fixed-APR debt based on your balance, APR, and monthly payment. It also estimates your debt-free date and total interest paid so you can compare payment plans side by side.

Ideal for anyone building a payoff strategy, this tool makes it easy to test different monthly payments, check whether your current payment is actually reducing the balance, and understand how much interest you can save by paying more than the minimum.

FAQs

Why does payoff show infinite?: Your payment doesn’t cover monthly interest. Increase the payment until a finite payoff appears.
Do fees or variable rates affect this?: Yes. This assumes a fixed rate and no fees. Add fees to balance and rerun or use a higher APR to approximate.
Billing cycle timing?: This adds whole months; actual dates may vary slightly by lender cycle.
Extra payments?: Not modeled here. Increase the monthly payment to approximate extras or use a payoff calculator that supports varied payments.
Can I use this for mortgages?: Works for any fixed-rate debt but ignores escrows/fees; use mortgage-specific tools for taxes/insurance/PMI.

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This debt payoff date calculator is an educational planning aid that uses a simplified, fixed-rate amortization model. It does not reflect every nuance of your cardholder agreement or loan contract, and it assumes no new charges, fees, or interest-rate changes. Always check your statements, confirm terms with your lender, and consider speaking with a qualified financial professional or credit counselor before making major changes to your debt strategy.