Debt Payoff Calculator
Estimate debt payoff time, interest, and extra-payment savings.
How long will it take to clear my debt?
The payoff time depends on the balance, the interest rate and how much you pay each month above the interest charged.
Formula: Each month, interest equals balance × APR ÷ 12. Payment covers interest first and the remainder reduces principal.
Estimated payoff time
47 months
- Total interest
- $3,967.21
- Total paid
- $13,967.21
- Monthly payment
- $300.00
What-if comparison
- Required payment only
- 47 months
- Months saved
- 0
- Interest saved
- $0.00
Balance over time
| Payment | Amount | Principal | Interest | Balance |
|---|---|---|---|---|
| 1 | $300.00 | $150.00 | $150.00 | $9,850.00 |
| 2 | $300.00 | $152.25 | $147.75 | $9,697.75 |
| 3 | $300.00 | $154.53 | $145.47 | $9,543.22 |
| 4 | $300.00 | $156.85 | $143.15 | $9,386.36 |
| 5 | $300.00 | $159.20 | $140.80 | $9,227.16 |
| 6 | $300.00 | $161.59 | $138.41 | $9,065.57 |
| 7 | $300.00 | $164.02 | $135.98 | $8,901.55 |
| 8 | $300.00 | $166.48 | $133.52 | $8,735.07 |
| 9 | $300.00 | $168.97 | $131.03 | $8,566.10 |
| 10 | $300.00 | $171.51 | $128.49 | $8,394.59 |
| 11 | $300.00 | $174.08 | $125.92 | $8,220.51 |
| 12 | $300.00 | $176.69 | $123.31 | $8,043.82 |
| 13 | $300.00 | $179.34 | $120.66 | $7,864.48 |
| 14 | $300.00 | $182.03 | $117.97 | $7,682.44 |
| 15 | $300.00 | $184.76 | $115.24 | $7,497.68 |
| 16 | $300.00 | $187.53 | $112.47 | $7,310.14 |
| 17 | $300.00 | $190.35 | $109.65 | $7,119.80 |
| 18 | $300.00 | $193.20 | $106.80 | $6,926.59 |
| 19 | $300.00 | $196.10 | $103.90 | $6,730.49 |
| 20 | $300.00 | $199.04 | $100.96 | $6,531.45 |
| 21 | $300.00 | $202.03 | $97.97 | $6,329.42 |
| 22 | $300.00 | $205.06 | $94.94 | $6,124.36 |
| 23 | $300.00 | $208.13 | $91.87 | $5,916.23 |
| 24 | $300.00 | $211.26 | $88.74 | $5,704.97 |
| 25 | $300.00 | $214.43 | $85.57 | $5,490.55 |
| 26 | $300.00 | $217.64 | $82.36 | $5,272.90 |
| 27 | $300.00 | $220.91 | $79.09 | $5,052.00 |
| 28 | $300.00 | $224.22 | $75.78 | $4,827.78 |
| 29 | $300.00 | $227.58 | $72.42 | $4,600.19 |
| 30 | $300.00 | $231.00 | $69.00 | $4,369.20 |
| 31 | $300.00 | $234.46 | $65.54 | $4,134.74 |
| 32 | $300.00 | $237.98 | $62.02 | $3,896.76 |
| 33 | $300.00 | $241.55 | $58.45 | $3,655.21 |
| 34 | $300.00 | $245.17 | $54.83 | $3,410.04 |
| 35 | $300.00 | $248.85 | $51.15 | $3,161.19 |
| 36 | $300.00 | $252.58 | $47.42 | $2,908.60 |
| 37 | $300.00 | $256.37 | $43.63 | $2,652.23 |
| 38 | $300.00 | $260.22 | $39.78 | $2,392.02 |
| 39 | $300.00 | $264.12 | $35.88 | $2,127.90 |
| 40 | $300.00 | $268.08 | $31.92 | $1,859.82 |
| 41 | $300.00 | $272.10 | $27.90 | $1,587.71 |
| 42 | $300.00 | $276.18 | $23.82 | $1,311.53 |
| 43 | $300.00 | $280.33 | $19.67 | $1,031.20 |
| 44 | $300.00 | $284.53 | $15.47 | $746.67 |
| 45 | $300.00 | $288.80 | $11.20 | $457.87 |
| 46 | $300.00 | $293.13 | $6.87 | $164.74 |
| 47 | $167.21 | $164.74 | $2.47 | $0.00 |
Results are estimates for informational purposes only and are not financial advice.
What this calculator does
Model one debt balance with a required payment and optional extra monthly amount.
Use it to turn Debt balance, APR, Required monthly payment, Extra monthly payment into a checked result you can compare, copy, or rerun with different assumptions.
The page shows the formula, a numeric worked example, and the assumptions that affect this finance calculation.
Inputs and what they mean
- Debt balance
- — number value.
- APR
- — number value.
- Required monthly payment
- — number value.
- Extra monthly payment
- — number value.
How to use it
- Enter the values for your estimate.
- Adjust the rate, duration, and optional scenario inputs.
- Review the totals, comparison, chart, and schedule where available.
Formula
Each month, interest equals balance × APR ÷ 12. Payment covers interest first and the remainder reduces principal.
Inputs used: Debt balance, APR, Required monthly payment, Extra monthly payment.
Edge handling: Debt balance is required.; Debt balance cannot be negative.; Debt balance must be no more than 1000000000000.; APR is required.; APR cannot be negative..
Worked example
$10,000 debt at 18%
- Start with Debt balance: 10000, APR: 18, Required monthly payment: 300, Extra monthly payment: 100.
- Apply the method: Each month, interest equals balance × APR ÷ 12. Payment covers interest first and the remainder reduces principal.
- Compare a $300 required payment with an extra monthly payment.
Reading the result
The headline figure is the main answer. Any breakdown underneath shows the parts that make it up, so you can check the working and see what changes when you adjust an input.
Limitations and assumptions
- Results are estimates for informational purposes only and are not financial advice.
- Inputs outside the supported range are rejected rather than forced into a result.
- The result depends on the values you enter for this debt payoff calculator; it does not supply missing rates, rules, prices, dates, or assumptions for you.
Common questions
How long will it take to clear my debt?
The payoff time depends on the balance, the interest rate and how much you pay each month above the interest charged. Check the formula, example, and limitations on this page before using the result for a real finance decision.
What if payment does not cover interest?
The calculator reports that the debt cannot be repaid with that payment. Check the formula, example, and limitations on this page before using the result for a real finance decision.
Is this a debt strategy recommendation?
No. It only estimates one balance under the entered terms.
How do I use the Debt Payoff Calculator?
Enter the required values for Debt balance, APR, Required monthly payment, Extra monthly payment. The calculator applies the formula on this page and shows the main result with any supporting breakdown so you can check the arithmetic.
What formula does the Debt Payoff Calculator use?
Each month, interest equals balance × APR ÷ 12. Payment covers interest first and the remainder reduces principal. The visible formula section above lists the calculation path and the edge cases the page handles, so the result can be checked without relying on the form alone.
Can the Debt Payoff Calculator be used for exact decisions?
Use it as a calculation aid, not as a substitute for checking the underlying rule, contract, policy, or professional advice that applies to your situation. When a result depends on local rules, personal details, prices, or dates, enter those values yourself and confirm them before acting.
Cite this page
Free Calculator. (n.d.). Debt Payoff Calculator. https://freecalculator.tech/tools/debt-payoff-calculator
"Debt Payoff Calculator." Free Calculator, https://freecalculator.tech/tools/debt-payoff-calculator.
Debt Payoff Calculator — Free Calculator, https://freecalculator.tech/tools/debt-payoff-calculator
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