Debt Repayment Calculator — Time and Cost of Payoff

The calculator computes how many months it takes to pay off a debt at a given monthly payment and annual interest rate. It also shows the total repayment cost and total interest. Just enter the debt amount, interest rate and monthly payment to get instant results.

The debt snowball method means paying off the smallest debts first, regardless of their interest rate. Each cleared debt frees up money that rolls into the next one — the snowball grows. It is psychologically motivating because you see progress quickly.

The debt avalanche method targets the highest-interest debt first. It minimises total interest paid and is mathematically optimal. It may feel slower at the start, but saves the most money over time.

If the monthly payment is less than the accrued interest, the debt balance grows — this is a debt trap. The calculator flags this situation. You should increase the payment, negotiate a lower rate or seek advice from a financial counsellor.

Key strategies include: increasing the monthly payment, making lump-sum extra payments (bonus, tax refund), consolidating debts at a lower rate and cutting unnecessary spending. Even small extra payments significantly shorten the payoff time.

Consolidating multiple loans into one with a lower interest rate can reduce monthly payments and total cost. Always check fees, insurance and other charges associated with the new product. Use the calculator to compare scenarios before and after consolidation.

The higher the interest rate, the more of each payment goes toward interest and less toward principal, so the debt shrinks more slowly. At 20% annual interest, paying off the same debt can take several times longer than at 5%. Compare calculator results for different rates to see the impact.

The payment must exceed the monthly interest on the debt. Monthly interest = debt balance × annual rate / 12. For a 20,000 PLN debt at 10% that is about 167 PLN per month. Any payment above this amount gradually reduces the principal.

The calculator assumes a constant payment throughout the repayment period. If you plan extra payments, enter a higher monthly payment — the calculator will recalculate the payoff time and total cost automatically. Making extra payments shortens the term and reduces interest.

No. Results are indicative and based on a simplified model. The actual schedule depends on contract terms, interest type (fixed, variable), fees and other charges. Always review your loan agreement or consult a financial adviser.