How to Pay Off Your Mortgage Early (And How Much You Save)

Can $300 a month really cut almost nine years off your mortgage? On a $320,000 loan at 6.5%, it ends the loan 8 years 10 months early and saves $138,446 in interest. Paying off a mortgage early comes down to one move: sending extra money to principal. The real questions are which method fits your budget and what you give up to do it.

How Do Extra Mortgage Payments Actually Save You Money?

Extra mortgage payments save money because interest is charged on your remaining balance, not your original loan amount. Every extra dollar lowers that balance right away, so next month’s interest shrinks too.

Early in a loan, most of each payment is interest. On a $320,000 loan at 6.5%, the first payment of $2,022.62 includes $1,733.33 of interest and only about $289 of principal. An extra $300 that month more than doubles the principal you retire.

The effect snowballs over time. A lower balance means less interest, which lets more of each regular payment reach principal. You can test this on your own loan with the Mortgage Payoff Calculator. It runs your schedule with and without extra payments and compares the two.

How Much Do You Save With an Extra $300 a Month?

An extra $300 a month on a $320,000 loan at 6.5% saves $138,446 in interest and ends the loan 8 years 10 months early. Payoff arrives in 21 years 2 months instead of 30 years.

Total interest falls from $408,142 to $269,696. Over those 21 years 2 months, you send $75,952 in extra principal. Each extra dollar therefore saves about $1.82 in interest.

Larger extras save more, but each added $100 saves less than the one before. Once the loan shrinks quickly, less interest remains to eliminate.

Lump Sum vs Steady Extra Payments: Which Saves More?

Dollar for dollar, a lump sum paid early saves more, because it lowers the balance sooner and every later month benefits. A monthly extra saves more only when it adds up to more money over time.

Compare equal amounts on the same $320,000 loan. A $20,000 lump sum paid up front saves $99,094 and ends the loan 4 years 10 months early. Spreading $20,100 as $300 a month for 67 months saves $82,406 and 4 years 2 months.

The $138,446 result above comes from paying $300 for the full 21 years 2 months, or $75,952 in total. Many borrowers combine both methods. They keep a small monthly extra and send windfalls like a tax refund or bonus as lump sums.

A lump sum also opens the door to a recast. The lender re-amortizes the smaller balance over the remaining term, which lowers your required payment, usually for a fee. Our guide on what a mortgage recast is and how it works covers the details.

What Other Ways Can You Pay Off a Mortgage Faster?

Three other methods speed up payoff: one extra payment a year, a biweekly schedule, and refinancing to a shorter term. Each trades a different mix of cash flow, cost, and flexibility.

One extra full payment of $2,022.62 each year ends the same $320,000 loan in 24 years 4 months. That saves $89,583 in interest and 5 years 8 months. Paying half a payment every two weeks produces that extra payment automatically. See whether biweekly mortgage payments really save money for how that schedule works.

Refinancing to a 15-year term forces a faster pace. At the same 6.5% rate, the payment rises by $764.92 to $2,787.54. Total interest drops to $181,758, a saving of $226,385 before closing costs.

Here is the non-obvious part. At the same rate, adding $765 a month to the 30-year loan also retires it in 15 years with about the same interest. A refinance earns its closing costs only when the shorter term brings a lower rate. Keeping the 30-year loan also keeps a lower required payment for a tight month.

What Are the Tradeoffs of Paying Off a Mortgage Early?

The main tradeoffs are lost flexibility, the return you give up elsewhere, and a smaller mortgage interest deduction. A prepayment penalty can also cut into savings on some loans.

• Opportunity cost. Each extra dollar earns a guaranteed return equal to your rate, 6.5% in this example. Investment returns carry no guarantee and swing in both directions.
• Emergency fund. Home equity is hard to reach quickly, since getting it back takes a new loan or a sale. Build cash reserves before you prepay.
• Higher-interest debt. A credit card charging 20% costs far more than a 6.5% mortgage. Clear that balance first.
• Prepayment penalties. Not all mortgages have one. The CFPB says penalties usually apply within three or five years, mainly when you pay off the full balance.
• Mortgage interest deduction. Less interest means a smaller deduction, but it helps only when you itemize. At a 22% bracket, $1,000 of deductible interest saves at most $220 in tax.

IRS Publication 936 caps deductible acquisition debt at $750,000 for loans taken out after December 15, 2017. Skipping $1,000 of interest still leaves you at least $780 ahead.

How Do You Start Paying Off Your Mortgage Early?

Start by confirming your loan terms, then pick an extra amount you can sustain every month. Five steps set it up correctly.

1. Check your loan documents or call your servicer to confirm there is no prepayment penalty.
2. Choose a steady extra amount you can afford every month, even $50 or $100.
3. Ask your servicer how to mark extra money for principal, often a note field or a separate online option.
4. Confirm on your next statement that principal dropped by the full extra amount. Some servicers otherwise hold the money for next month’s payment.
5. Recheck your progress once a year using your current balance and rate.

The Mortgage Amortization Calculator shows how each payment splits between principal and interest. It explains why early payments feel slow and later ones speed up.

FAQs About Paying Off a Mortgage Early

Sources

This article is general education, not financial advice. The sample figures use an illustrative loan and will differ from yours. Reviewed for accuracy by Prof. Dr. Khalil Mudassar, PhD. Last updated September 26, 2026.