Debt Payoff Calculator
Calculate your debt-free date and see how extra payments can help you pay off debt faster.
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About the Debt Payoff Calculator
If you have multiple debts, the order you pay them off matters. Mathematically, the highest-interest debt should be eliminated first (avalanche). Psychologically, paying off the smallest balance first (snowball) builds momentum. This page shows the numbers behind both strategies and helps you choose.
The Formula
For each debt, payoff time depends on minimum payment, extra payment applied, and interest rate. Total extra payment from your budget goes to one debt at a time. When that debt is paid off, its minimum + extra rolls into the next target.
Worked Example
Three debts: Card A $1,000 at 18%, Card B $5,000 at 22%, Loan C $8,000 at 9%. Extra $300/month available. Avalanche (highest rate first): kill Card B fastest, total interest paid ≈ $2,300. Snowball (smallest balance first): kill Card A fastest for early win, total interest paid ≈ $2,700. Avalanche saves $400; snowball builds motivation.
Snowball vs avalanche
Avalanche (rate-priority) minimises total interest paid. Pure maths winner. Snowball (smallest-balance-first) gives early wins, builds motivation, and helps people stick with the plan. Behavioural studies show snowball completers actually pay off more debt in practice because they don't give up. Use avalanche if you're disciplined and the rate spread is large. Use snowball if you've fallen off debt plans before and need wins to stay engaged.
The debt-payoff hierarchy
Before extra debt payments, ensure: minimum payments on everything (avoid penalties), $1,000 emergency fund (prevents new debt from emergencies), employer 401(k) match (free 100% return). Then attack consumer debt by avalanche or snowball.
Where extra money beats debt payoff
Employer 401(k) match: always beats debt payoff. Some high-yield savings: only when debt rates are very low (below 5%). Mortgage payoff vs investing: mathematically usually investing wins long-term at 7%+ market returns vs 5-7% mortgage rates, but mortgage payoff is psychologically powerful.
Common Mistakes
- Adding all debts in your head and getting overwhelmed instead of writing the plan down with specific payoff dates.
- Pausing emergency fund building to attack debt aggressively, then taking on new debt when the next emergency hits.
- Closing paid-off credit cards. This shortens credit history and raises utilization on remaining cards, hurting your score.
Frequently Asked Questions
Should I use savings to pay off credit cards?
Yes if your savings exceed your emergency fund and the debt rate is above 10%. Keep $1,000+ liquid for emergencies before deploying savings.
What about consolidation loans?
Can lower your blended rate and simplify payments. Only effective if you don't run the cards back up — most people who consolidate without changing spending habits end up worse off.
This calculator is for informational purposes only and does not constitute financial, tax, or legal advice. Consult a licensed professional before making significant financial decisions.