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Mortgage Payoff Calculator

Extra payments, biweekly, or a lump sum -- see exactly what each saves you. Takes 60 seconds.

  1. 1 Your loan
  2. 2 Your strategy
  3. 3 Compare
  4. 4 Your results

Your current loan

Three numbers is all we need. Roughly is fine -- you can refine later.

$
What you still owe -- check your latest statement or online account.
%

Numbers above are estimates from standard mortgage math and 2026 program rules. Your actual rate depends on your credit, debt-to-income, property type, and lender pricing. RobotRefi is not a lender and does not originate loans.

How RobotRefi calculates this

01

Every extra dollar is a guaranteed return

When you pay extra principal, you eliminate a dollar that would have accrued interest every remaining month of the loan. At 6.5%, each dollar saves you roughly $0.0054/month -- compounded for years. The effect stacks every month you keep doing it.

02

Biweekly is free -- skip the programs

Most biweekly payment programs charge $300-500 to do something you can do yourself for free. Making 26 half-payments per year equals 13 full payments instead of 12. That one extra payment per year is the entire source of savings. Set up an auto-transfer and skip the middleman.

03

Lump sums hit hardest early

The sooner you apply a lump sum, the more interest it eliminates. A $10,000 payment in month 1 saves far more than the same payment in year 15, because it removes interest-bearing balance during the highest-interest phase of the amortization schedule.