Debt Payoff Calculator
Enter your debts and choose a payoff strategy to see how long it will take to become debt-free.
Your Debts
Payoff Strategy
How to Use This Tool
- Add each debt with its balance, interest rate, and minimum payment.
- Choose a payoff strategy: snowball (smallest balance first) or avalanche (highest interest first).
- Enter any extra monthly payment you can afford.
- Click Calculate to see your payoff timeline, total interest, and a month-by-month schedule.
Formula and Logic
The calculator uses a month-by-month simulation. Each month, it applies the periodic interest to each debt, then pays the minimum on all debts. Any extra payment is applied to the target debt (the next debt in the chosen order). Once a debt is paid off, the extra payment is rolled into the next debt's payment. The process repeats until all debts are zero.
The periodic interest rate is calculated as (annual rate / 12) for monthly compounding. The payoff date is estimated by counting the months until all balances reach zero.
Practical Notes
- Interest rates significantly impact the total cost of debt. The avalanche method saves the most interest by targeting high-rate debts first.
- Compounding frequency matters: credit cards often compound daily, but this calculator assumes monthly compounding for simplicity. For precise calculations, adjust the interest rate accordingly.
- Tax implications: Some debts (like student loans or mortgages) may have tax-deductible interest. This calculator does not account for tax benefits.
- Budgeting: Allocate as much extra as possible to accelerate payoff. Even small extra payments can reduce total interest dramatically.
- Avoid new debt: While paying off existing debt, try to avoid accumulating new charges to stay on track.
Why This Tool Is Useful
It provides a clear, personalized roadmap to becoming debt-free. By comparing snowball vs. avalanche, you can choose a strategy that fits your financial psychology and goals. The detailed schedule helps you track progress and stay motivated.
Frequently Asked Questions
What if I can't afford the minimum payments?
If your monthly payments are too high, consider contacting creditors for hardship programs, debt consolidation, or credit counseling. This calculator assumes you can at least meet the minimums.
Should I choose snowball or avalanche?
The avalanche method saves the most money on interest. The snowball method provides psychological wins by paying off smaller debts first, which can boost motivation. Choose based on what keeps you committed.
How does extra payment affect the payoff?
Extra payments are applied directly to the principal of the target debt, reducing the balance faster and saving interest. Even an extra $50 per month can shorten the payoff term by months or years.
Additional Guidance
- Regularly review your progress and adjust extra payments as your income changes.
- Consider using windfalls (tax refunds, bonuses) to make lump-sum extra payments.
- If you have multiple debts with similar interest rates, the snowball method may be more effective for behavior change.
- Always prioritize high-interest debt (like credit cards) over low-interest debt (like mortgages) when possible.