Gera Tools

Alabama Biweekly Mortgage Calculator

See interest saved with biweekly payments in Alabama

Compare a standard monthly Alabama mortgage with a biweekly schedule (26 half-payments = 13 monthly payments a year). Shows how many years you cut off the loan, the interest saved, and the new payoff date — using Alabama amortization.

How do biweekly mortgage payments work in Alabama?

You pay half your monthly payment every two weeks. Because there are 52 weeks in a year, that is 26 half-payments, equal to 13 full monthly payments instead of 12 — one extra payment a year that goes straight to principal.

The Alabama Biweekly Mortgage Calculator compares a standard monthly Alabama mortgage with a biweekly schedule and shows how much interest you save and how many years you cut off the loan.

How it works

A biweekly plan pays half the monthly payment every two weeks. With 52 weeks in a year that is 26 half-payments = 13 full monthly payments, so you make one extra monthly payment a year, all of it going to principal.

Both schedules use standard amortization:

M = P * r * (1 + r)^n / ((1 + r)^n - 1)

where P is the loan amount, r is the periodic interest rate, and n is the number of payments. The monthly schedule uses r = annualRate / 12 over term * 12 payments; the biweekly schedule pays M / 2 every two weeks at r = annualRate / 26. The tool amortizes both to payoff and reports the difference in total interest and time.

Example

A $350,000 Alabama loan at 6.50% over 30 years:

Monthly payment   = $2,212.24
Biweekly payment  = $1,106.12 every 2 weeks
Total interest (monthly)  = $446,405.71
Total interest (biweekly) = $343,596.97
Interest saved   = $102,808.74
Payoff time saved = about 5.8 years

Switching to biweekly on this loan saves roughly $102,809 and pays it off about 5.8 years early.

Notes

This is an estimate only and not financial advice. It models principal and interest with a fixed rate; it does not include property tax, homeowners insurance, PMI, or HOA dues, and it assumes payments are applied to principal as scheduled. Some Alabama lenders do not offer true biweekly billing — paying 1/12 extra principal each month achieves the same result for free. Confirm there is no prepayment penalty on your note and verify exact figures with your lender or the Consumer Financial Protection Bureau (CFPB). All math runs in your browser — nothing is sent anywhere.