The debt payoff calculator shows exactly when you'll be debt-free and how much interest you'll pay. It uses the amortization formula to compute month-by-month balances, showing how minimum payments mostly cover interest while extra payments attack the principal directly.
Credit card minimum payments are designed to keep you in debt as long as possible. A $5,000 balance at 22% APR with $100 minimum payments takes 9.5 years to pay off and costs $6,400 in interest — more than the original balance.
The avalanche method (highest interest first) saves the most money. The snowball method (smallest balance first) provides psychological wins. Both outperform minimum payments dramatically.
Even small extra payments make a massive difference. Adding just $50/month to the example above cuts payoff time from 9.5 years to 4.8 years and saves $3,200 in interest.
Debt Payoff Time Formula
Months = −log(1 − (Balance × Rate / Payment)) / log(1 + Rate)
Where Balance = current balance, Rate = monthly interest rate (APR ÷ 12), Payment = monthly payment amount. This formula assumes fixed payments and no new charges.
You owe $8,000 on a credit card at 21.99% APR and pay $200/month.
Result: Payoff time: 62 months (5 years 2 months). Total interest paid: $4,366. With $300/month: 34 months, $2,089 interest saved.
At 20% APR with $200/month payments: about 9 years, costing $11,680 total. At $400/month: 2.5 years, costing $12,040 total but saving $7,600 in interest.
The avalanche method (highest rate first) saves the most money. The snowball method (smallest balance first) provides motivation. Choose avalanche if disciplined, snowball if you need psychological wins.
As much as possible. Even $25-50 extra per month makes a dramatic difference. The minimum payment is designed to maximize the lender's interest income, not help you.
Yes. Reducing credit utilization (balance ÷ limit) is the fastest way to boost your score. Getting below 30% utilization has the biggest impact.