Biweekly Mortgage Calculator
Half a payment every two weeks instead of one payment a month. It sounds like a gimmick. The math says otherwise — here is exactly what it does to your loan.
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Why half a payment every two weeks does so much
There are 52 weeks in a year, so paying every two weeks means 26 payments. Twenty six half payments is thirteen full payments. You have quietly made one extra mortgage payment a year without ever writing a check that felt bigger.
That thirteenth payment goes entirely to principal, and principal is where the leverage is. Every dollar you remove from the balance stops generating interest for the rest of the loan. Do that once a year, early, on a 30 year mortgage, and the effect compounds into something that genuinely surprises people the first time they see it.
The catch nobody mentions
Two things to check before you assume this works.
- Your servicer has to apply it correctly. Some will hold each half payment in a suspense account and only apply it once the full monthly amount lands, which destroys the entire benefit. Ask directly: will you apply biweekly payments as they arrive, and will the extra annual payment go to principal?
- Some servicers charge for a biweekly program. Do not pay a fee for this. If yours wants one, skip the program and simply add extra principal yourself each month — switch this calculator to the extra principal tab and you can size it to produce the same result, for free.
For the loan officers reading this
This is one of the highest trust conversations you can have with a client, precisely because it does not sell anything. You are showing them how to pay you less interest. Run it for them at the closing table and you will be the loan officer they call in five years, and the one they send their brother to.
Common questions
Does paying biweekly really save money?
Yes, provided your servicer applies the payments as they arrive. The saving comes from making the equivalent of one extra full payment a year, applied to principal. Run your own numbers above to see the specific figure for your loan.
Is biweekly better than just paying extra each month?
They are the same mechanism. Biweekly is a scheduling trick that produces an extra annual payment automatically. If you would rather control it yourself, add extra principal monthly. The extra principal tab lets you compare the two directly.
Should I pay off my mortgage early at all?
That depends on your rate and what else you would do with the money, and it is a genuine judgment call rather than a rule. A low rate mortgage is cheap debt. A high rate one is not. This calculator tells you what the payoff saves. It cannot tell you whether that beats the alternative use of the same dollars.