How Extra Payments Show Up on Your Amortization Table
What an amortization table shows when you pay extra
An amortization table is a month-by-month breakdown of your loan balance, how much of each payment goes to interest versus principal, and what you still owe. When you make an extra payment toward principal, the table changes: your balance drops faster, you pay less interest over the life of the loan, and you reach payoff sooner. The table itself does not automatically update—you either recalculate it yourself, ask your lender for a revised one, or use an online calculator that factors in extra payments.
Most lenders do not send you a new amortization table every time you pay extra. Instead, they track the change in your account and apply it to your next scheduled payment. This means the original table your lender gave you at closing no longer matches your actual payoff date or remaining balance. Understanding how to read both the original table and the revised one helps you see exactly how much time and money your extra payments save.
Key Takeaways
- Extra principal payments reduce your loan balance immediately, which lowers the interest charged on future months and shortens your payoff timeline.
- Your original amortization table assumes you make only the scheduled payment each month; it does not account for extra payments you make later.
- To see the real impact of extra payments, you need a revised amortization table, which your lender can provide or you can generate using an online calculator.
- The earlier in the loan you make extra payments, the more interest you save, because you are reducing the balance when interest charges are highest.
- Some lenders charge a prepayment penalty for paying off the loan early; check your promissory note or loan documents before making large extra payments.
How the original amortization table works
Your lender creates an amortization table at closing based on three numbers: your loan amount, your interest rate, and your loan term (usually 15 or 30 years). The table divides your monthly payment into two parts: interest and principal. In the early months, most of your payment goes to interest. As the loan ages, more of each payment goes to principal, until the final payment pays off the last few dollars of balance.
The original table assumes you make the same payment every month and nothing more. It shows your balance at the end of each month if you follow that schedule exactly. If you pay extra, the actual balance will be lower than the table predicts, and the interest you owe in the next month will also be lower. This is why the original table becomes outdated the moment you make your first extra payment.
What changes when you make an extra payment
When you send extra money toward principal, three things happen immediately: your loan balance drops by that amount, the interest calculated for your next month is lower (because it is based on a smaller balance), and your payoff date moves earlier. If you make extra payments consistently, the cumulative effect is large. A single extra payment of $200 might save you $500 in interest and shorten your loan by several months. Multiple extra payments compound that benefit.
The key is that extra payments must be marked as going toward principal, not toward next month's payment. Some lenders automatically apply extra money to principal; others require you to specify it in writing or through your online account. Always confirm with your lender how they handle extra payments, because if they treat it as a prepayment of your next scheduled payment instead of extra principal, you will not see the interest savings you expect.
How to get a revised amortization table
Your lender can provide a revised amortization table showing your new payoff date and remaining balance after you make extra payments. Call your servicer or log into your online account and request an updated amortization schedule. Some lenders generate this automatically after a large extra payment; others only provide it on request. The revised table will show your new monthly payment schedule (if your payment amount changes) and your new payoff date.
If your lender does not provide a revised table, you can generate one yourself using an online amortization calculator. Enter your current loan balance (not the original amount), your interest rate, and the number of months remaining until your original payoff date. The calculator will show you what your balance would be if you continue making only your scheduled payment. Then run the calculator again with a lower balance (the amount after your extra payment) to see the new payoff timeline. Many mortgage websites and financial calculators offer this tool for free.
How extra payments save you money
Interest on a mortgage is calculated daily based on your outstanding balance. The lower your balance, the less interest you owe. By paying extra principal early in the loan, you reduce the balance when interest charges are highest. A $200 extra payment in month 12 saves more interest than a $200 extra payment in month 300, because the balance is much larger early on.
The total savings depend on how much extra you pay and when you pay it. A single extra payment of $500 in year one might save $3,000 to $5,000 in total interest over a 30-year loan, depending on your rate. If you make extra payments consistently—say, an extra $100 every month—you could save $30,000 or more and pay off the loan years early. Use an amortization calculator to model your specific situation and see the exact savings for your loan amount and rate.
Prepayment penalties and when they apply
Some mortgages include a prepayment penalty, which is a fee charged if you pay off the loan faster than the agreed schedule. Prepayment penalties are less common in mortgages than in other loans, but they do exist, especially in subprime or non-traditional mortgages. The penalty is usually a percentage of the amount you pay early (for example, 1 percent of the extra principal) or a flat fee. It may apply only during the first few years of the loan.
Check your promissory note or loan documents to see whether a prepayment penalty applies to your mortgage. If it does, calculate whether the interest you save by paying extra exceeds the penalty cost. In many cases, the interest savings outweigh the penalty, but not always. If you are unsure, call your lender and ask directly: "Does my loan have a prepayment penalty, and if so, when does it expire?"
Reading your revised amortization table
A revised amortization table after extra payments looks similar to the original, but with different numbers. The columns are the same: payment number, payment amount, principal, interest, and remaining balance. The difference is that the remaining balance decreases faster, and the final payment comes sooner. If you made extra payments in months 1 through 12, you will see the balance drop more steeply in those months than the original table predicted.
Pay attention to the final row. The original table might show payoff in month 360 (30 years). The revised table might show payoff in month 310 or 290, depending on how much extra you paid. The interest column in the revised table will also show lower numbers in each row, because each month's interest is calculated on a smaller balance. Add up all the interest in the revised table and compare it to the original table to see your total interest savings.
Common mistakes when making extra payments
The most common mistake is not specifying that the extra money should go toward principal. If you send an extra $300 and your lender treats it as a prepayment of next month's regular payment, you will not see the interest savings you expected. Always include a note with your payment or call your lender to confirm the extra money is applied to principal.
Another mistake is assuming your monthly payment will decrease after you make extra payments. In most cases, your regular monthly payment stays the same; the extra payment simply reduces your balance and shortens your loan term. Some loans allow you to recalculate your payment to a lower amount after extra payments, but this is not automatic. If you want to lower your monthly payment, you must request a loan modification or recalculation from your lender.
Frequently Asked Questions
Will making one extra payment per year really shorten my loan?
Yes. One extra payment per year (equivalent to one-twelfth of your annual payment going to principal) can shorten a 30-year mortgage by 4 to 5 years and save $40,000 to $60,000 in interest, depending on your rate. The exact savings depend on your loan amount and interest rate; use an amortization calculator with your specific numbers to see the impact.
Can I make extra payments without telling my lender?
You can send extra money, but your lender needs to know it should go toward principal, not toward next month's payment. Without that instruction, the extra money may sit in your account or be applied incorrectly. Always include a written note with your payment or call your servicer to specify that the extra amount is for principal reduction.
What if I make extra payments and then need to stop?
Your regular monthly payment does not change when you make extra payments. If you stop making extra payments, you simply return to paying only your scheduled amount each month. Your loan will take longer to pay off than the revised amortization table predicted, but you will not owe a penalty or face any other consequence for stopping extra payments.
Does my lender automatically send me a new amortization table after extra payments?
Most lenders do not send an updated table automatically. You must request one from your servicer, usually by phone or through your online account. Some lenders provide it within a few business days; others may charge a small fee. If your lender will not provide one, use an online amortization calculator to model your new payoff date based on your current balance.
Is it better to make extra payments or invest the money instead?
That depends on your interest rate and your investment returns. If your mortgage rate is 3 percent and you could earn 7 percent in the stock market, investing might build more wealth. If your rate is 6 percent and investment returns are uncertain, paying down the mortgage is a may provide return equal to your interest rate. Consider your comfort with risk and your financial goals; there is no single right answer for everyone.