Loan Calculator with Extra Payments
Input your loan balance, interest rate, and terms to see how much faster you can become debt-free by adding extra monthly contributions.
Loan Details
Accelerated Savings
Redirecting your saved monthly payments ($0/mo) for the 0 years you saved at a 7% annual return accumulates this wealth.
Understand the Power of Prepayment Math
Our comprehensive Loan Calculator with Extra Payments is designed to help you analyze the direct savings of prepaying any standard amortizing loan. Whether you are paying off a personal loan, an auto loan, or a student loan, adding a consistent extra monthly contribution can shorten your repayment term and save you hundreds or thousands of dollars in compounding interest.
How Loan Amortization and Prepayment Interact
Every standard loan payment is calculated so that your loan will be fully paid off by the end of the term. Interest is computed monthly using the formula:
Whatever portion of your monthly payment is left over after interest is paid is applied to your principal. Extra payments bypass this monthly split entirely, attacking the principal directly. This lowers the outstanding balance immediately, reducing the interest calculation for all subsequent months. For details on consumer loan terms and interest regulations, review the guidelines on the Federal Reserve Board website.
Worked Numerical Example
Consider a standard personal loan of $50,000 at an 8.5% interest rate over a 10-year term. Here is how adding an extra $100 per month accelerates your payoff:
- Loan Principal: $50,000
- Interest Rate: 8.5% (APR)
- Term: 10 Years (120 Months)
- Standard Payment: $619.98 / month
- Extra Monthly Payment: $100.00
| Repayment Schedule | Monthly Payment | Total Interest Paid | Total Cost of Loan | Payoff Timeline |
|---|---|---|---|---|
| Standard Schedule | $619.98 | $24,397.60 | $74,397.60 | 10.0 Years |
| Accelerated Prepayment | $719.98 | $18,485.42 | $68,485.42 | 7.9 Years |
| Total Savings | +$100.00 / month | $5,912.18 Saved | $5,912.18 Saved | 2.1 Years Shaved Off |
When to Use This vs. Our Other Calculators
Ensure you are using the best calculator for your specific debt category:
- Use the Personal Loan Payoff Calculator if you have a short-term unsecured signature loan or consolidation loan.
- Use the Auto Loan Calculator if you want to calculate savings specifically for auto financing.
- Use the Mortgage Calculator if you want to calculate prepayments for long-term home mortgages (15 or 30-year terms).