Debt Payoff Calculator
Paying only the minimum on debt can cost thousands in interest and take decades to pay off. This calculator compares payoff timelines and total interest under different strategies — minimum payments only, extra monthly payments, and the snowball vs avalanche methods for multiple debts.
Calculate Debt Payoff
This tool is for educational purposes only. It is not financial advice. Consult a qualified financial professional for personalized guidance.
Debt Payoff Strategies Compared
| Strategy | How It Works | Best For |
|---|---|---|
| Minimum Payments | Pay only the required minimum each month | Not recommended — maximizes interest paid and payoff time |
| Extra Payments | Add a fixed extra amount above the minimum each month | Single-debt payoff; simple and effective |
| Debt Snowball | Pay minimums on all debts; put extra toward the smallest balance first | People who need motivational wins — quick payoffs build momentum |
| Debt Avalanche | Pay minimums on all debts; put extra toward the highest APR first | Mathematically optimal — saves the most interest over time |
How Extra Payments Accelerate Payoff
When you make only minimum payments, most of your payment goes to interest — especially in the early months. Adding even a small extra payment each month reduces the principal faster, which means less interest accrues the following month. This creates a compounding savings effect.
For example, on a $15,000 credit card balance at 18.9% APR with a $300 minimum payment, adding $200 per month can save over $8,000 in interest and cut the payoff time roughly in half.
Frequently Asked Questions
Should I use the snowball or avalanche method?
The avalanche method saves more money because it targets the highest-interest debt first. However, the snowball method provides faster psychological wins by eliminating small balances quickly. Research shows that many people stick with the snowball method longer because the early wins maintain motivation. Choose the method you are most likely to sustain.
Should I pay off debt or save for emergencies first?
Most financial planners recommend building a small emergency fund ($1,000–$2,000) first, then aggressively paying off high-interest debt, then building a full 3–6 month emergency fund. Without an emergency fund, unexpected expenses can force you back into debt.
Does making extra payments cost me anything?
Check your loan terms. Most credit cards, personal loans, and auto loans have no prepayment penalty. Some mortgages may have prepayment penalties in the early years. Federal student loans never have prepayment penalties. Always verify before committing to an accelerated payoff plan.