Money & Salary
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Debt Payoff & Accelerated Paydown Calculator
Find out exactly when you will be debt-free and calculate how much time and interest you save by adding extra monthly payments.
How long will it take to pay off my credit card or loan balance?How much interest will I save by paying an extra $50 or $100 per month?What is the minimum payment required to prevent debt from growing?
Instant in-browser · no uploads
Current Debt Details
$
19.9% APR
Personal Loan (6–12%) • Credit Card (18–25%) • Store Card (28%+)
Min: $134.00/mo
$
+$75.00 / month
Additional principal added to your regular monthly payment
Debt-Free Timeline
2.7 years(32 months)
You become debt-free 14 months sooner and save $1,131.69 in interest!
Standard Payoff (No Extra)
3.8 Years
Total Interest: $3,497.96
Total Paid: $11,497.96
Accelerated Plan
2.7 Years
Total Interest: $2,366.27
Total Paid: $10,366.27
• Starting debt: $8,000.00
• Total payment with extra: $325.00/mo
• Net interest saved: $1,131.69
How this calculation works
Calculates the logarithmic compound monthly repayment trajectory factoring continuous interest accrual on the declining balance.
Formula
Months = -ln(1 - (r × Balance) / Payment) / ln(1 + r)
Frequently asked questions
If your payment is less than the monthly interest charge, negative amortization occurs: your debt will grow indefinitely because the unpaid interest is added back to your principal balance.
Private by design
Calculations run entirely in your browser. Your financial data is never sent to a server.
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