How Extra Loan Payments Save You Money
When you make an extra payment on a loan, the additional amount goes directly toward reducing the outstanding principal balance. Since interest is calculated on the remaining balance, a lower principal means less interest accrues each month going forward. This creates a cascading effect: each extra payment reduces future interest charges, which means more of your regular payment goes to principal, accelerating the payoff even further.
The savings are most dramatic early in the loan when the balance is highest and interest charges are at their peak. On a 30-year mortgage, the first five years of extra payments have a much larger impact than the same payments made in the final five years. This is because the reduced principal has more time to compound the savings across all remaining payments.
This calculator compares your original amortization schedule against a modified schedule that includes your planned extra payments. It shows the revised payoff date, the total interest saved, and the number of payments eliminated. You can model one-time lump sum payments, recurring monthly extras, or a combination of both to find the strategy that fits your budget.
Example: Extra Payments on an Auto Loan
You have a $25,000 auto loan at 6.5% interest for 60 months with a monthly payment of $489.
- Enter the loan amount of $25,000, 6.5% rate, and 60-month term.
- Without extra payments, you pay $4,341 in total interest over the life of the loan.
- Adding $100 per month in extra payments reduces the term to 47 months, saving 13 months.
- Total interest drops to $3,305, saving $1,036 in interest charges.
- Adding $200 extra per month cuts the term to 39 months and saves $1,760 in interest.
Tips for Accurate Results
- Confirm with your lender that extra payments are applied to principal and not held for the next scheduled payment. Some lenders require you to specify principal-only.
- Focus extra payments on your highest-interest loan first if you have multiple debts. This is the debt avalanche method and minimizes total interest paid across all loans.
- Even rounding up your payment to the next $50 or $100 increment creates a small but consistent extra payment that adds up significantly over the life of the loan.
- If your lender charges a prepayment penalty, calculate whether the interest savings from extra payments exceed the penalty before proceeding with this strategy.
Frequently Asked Questions
How much do extra loan payments actually save?
The savings depend on your interest rate, remaining balance, and how much extra you pay. On a $200,000 mortgage at 6.5% for 30 years, an extra $200 per month saves approximately $89,000 in total interest and pays off the loan 8 years early. On a $20,000 auto loan at 7% for 5 years, an extra $100 monthly saves about $900 in interest and eliminates 11 months of payments.
Is it better to make extra payments or invest the money?
If your loan interest rate is higher than the expected return on investments after taxes, extra payments provide a guaranteed return equal to your interest rate. For high-interest debt above 6-7%, paying it down is almost always the better choice. For low-interest debt below 4-5%, investing may produce higher long-term returns, though the guaranteed savings from extra payments carry no risk.
Do extra payments go toward principal or interest?
Extra payments should go entirely toward reducing the principal balance. Most lenders apply the regular payment to interest first and then principal as scheduled, with any additional amount reducing the principal further. Verify with your lender that extra payments are handled this way. Some require you to explicitly designate the extra amount as a principal payment to prevent it from being applied to future scheduled payments.
Are there penalties for making extra loan payments?
Most auto loans and personal loans do not have prepayment penalties. Some mortgages, particularly those originated before 2014, may include prepayment penalty clauses that charge a fee for paying off the loan early. Check your loan agreement or ask your servicer. Federal regulations prohibit prepayment penalties on most qualified residential mortgages originated after January 2014.