Mortgage Calculator with Extra Payments

See how much interest you save by paying extra on your mortgage

🏠
Loan Amount ($)
📊
Interest Rate (% per year)
📅
Loan Term (years)
Extra Payments (Optional)
💵
Extra Monthly Payment ($)
🎁
Extra Annual Payment ($)
⚡
One-Time Payment ($)
Interest Saved with Extra Payments
$107,389
Pay off 7 years, 8 months earlier
Jan 2056
Regular Payoff
May 2048
With Extra Payments
Regular Schedule
Monthly Payment $1,896
Total Interest $382,633
Total Payments 360
With Extra Payments
Monthly Payment $2,096*
Total Interest $275,244
Total Payments 268
Save 28.1% of total interest (7 years, 8 months faster payoff)

HOW IT WORKS

This calculator shows how extra payments reduce your mortgage balance faster, saving interest and shortening your loan term. Any extra payment goes directly to principal (not interest), which reduces the total interest you pay over the life of the loan. Even small extra payments can save thousands of dollars and years of payments.

WHY EXTRA PAYMENTS SAVE SO MUCH

Mortgage interest is front-loaded: In the early years of a 30-year mortgage, most of your monthly payment goes to interest, not principal. Example: On a $300K loan at 6.5%, your first payment is $1,896 total but only $271 goes to principal ($1,625 is interest!).

Extra payments attack principal directly: Every extra dollar you pay goes 100% to reducing principal balance. This reduces future interest charges because interest is calculated on the remaining balance.

Compound effect over time: Paying an extra $200/month on a $300K loan at 6.5% saves $107,000 in interest and pays off the loan 8 years early. That's a 50:1 return on your extra payments!

STRATEGIES FOR EXTRA PAYMENTS

Monthly extra ($50-500): Most effective strategy. Automate through your lender's website. Even $100/month makes a huge difference.

Annual lump sum (bonus, tax refund): Apply work bonuses, tax refunds, or inheritance. Specify "apply to principal" to avoid paying ahead on regular payments.

Bi-weekly payments: Pay half your monthly payment every 2 weeks. You make 26 half-payments = 13 full payments per year instead of 12.

Round up payments: If payment is $1,896, pay $2,000. The extra $104/month adds up fast.

WHEN NOT TO MAKE EXTRA PAYMENTS

High-interest debt exists: If you have credit card debt (15-25% APR), pay that first. Your mortgage interest (3-7%) is much lower.

No emergency fund: Build 3-6 months expenses in savings before making extra mortgage payments.

Better investment opportunities: If you can earn 8-10% in stock market and your mortgage is 3-4%, investing may build more wealth.

Employer 401(k) match available: Always max employer match first (instant 50-100% return).

HOW TO MAKE EXTRA PAYMENTS

Specify "apply to principal": CRITICAL: When making extra payments, explicitly state "apply to principal only." Otherwise, lender may apply to next month's regular payment.

Online payment portals: Most lenders have online options to make extra principal payments. Look for "additional principal" field.

Verify on next statement: Check that extra payment reduced principal balance, not just paid ahead on regular payments.