Find your debt-free date, see the true cost of your balance, and discover how extra monthly payments can change everything.
Monthly compounding · Extra payment impact · Canada & USA
Debt Repayment
Loan Details
Optional — e.g. credit card annual fee
Optional — see the impact below
Debt-Free Date
September 2030
50 months to payoff
See how extra payments could shorten your payoff.
Cost breakdown
Balance over time
FinCalc Smart AI Debt Analysis
50 mo to payoff
Your 50-month payoff is manageable. A modest increase in monthly payment can noticeably reduce your total interest cost.
estimated interest saved
by adding $100/month to your payment
Enter a custom amount in the Extra Payment field above ↑
estimated interest saved
by adding $100/month to your payment
Enter a custom amount in the Extra Payment field above ↑
Interest Pressure
In month one, $83.29 of your $150.00 payment goes to interest — only $66.71 reduces your balance. This front-loading is why early repayment feels slow.
Payment Efficiency
Only 44% of each payment currently reduces your balance. More than half of every dollar is lost to interest. Extra payments flip this ratio faster than any other action.
Next Best Step
Adding $100/month saves $1,225 and cuts 25 months from your timeline. Use the Extra Payment field above to model your exact number.
Disclaimer: This analysis is for illustrative purposes only and does not constitute financial, tax, or investment advice. Results assume a fixed interest rate, no new charges to the balance, and consistent monthly payments. Individual outcomes will vary based on lender terms and personal circumstances. Consult a licensed financial advisor before making financial decisions.
To find how many months it takes to pay off a balance, we invert the standard amortisation formula and solve for n (number of payments):
| Variable | Meaning |
|---|---|
| n | Number of monthly payments until the balance reaches zero |
| P | Current outstanding balance |
| M | Monthly payment (must be greater than the monthly interest charge) |
| r | Monthly interest rate = annual rate ÷ 12 ÷ 100 |
The calculator runs this formula as a month-by-month simulation so the final (partial) payment is handled correctly and total interest is exact rather than approximated.
Each month, interest is calculated on the current outstanding balance — not the original balance. When the balance is large, the interest charge is large, leaving very little of each payment to reduce principal.
For a $5,000 balance at 19.99%, the first payment of $150 includes approximately $83 in interest and only $67 toward the balance. As the balance falls, the interest charge shrinks and an increasing share of each payment reduces principal — but the process accelerates slowly unless payment size increases.
Any amount paid above the interest charge reduces the principal directly. A smaller principal means less interest next month — which means more of the next payment reduces principal, and so on. This compounding effect means even a modest extra payment has a disproportionately large impact on total interest and payoff time.
The calculator always shows what adding $100/month would save compared to your current payment, regardless of whether you have entered an extra payment amount. You can also enter your own extra payment to see its precise effect.
Personal debt — credit cards, personal loans, lines of credit — compounds monthly in both Canada and the USA. The monthly rate is simply:
This differs from Canadian mortgages, which are required by the Interest Act (RSC 1985) to compound semi-annually. That rule does not apply to consumer credit products. The formula used in this calculator is correct for both countries.
This calculator is for illustrative and informational purposes only. Results are estimates and may not reflect actual credit card terms, loan agreements, fees, interest changes, minimum payment rules, or lender conditions. This does not constitute financial, tax, or legal advice. Consult a licensed financial advisor or qualified professional before making financial decisions.