Biweekly Payment Calculator
Calculate biweekly loan payments and see exactly how much interest you save vs. monthly payments. One extra annual payment saves thousands over the life of your loan.
📅 Biweekly Payment Calculator
Free · Instant · No registration required
⚠️ This calculator provides estimates for educational purposes only. Actual loan payments may vary based on your lender's specific terms, fees, and your credit profile. Consult a licensed financial advisor before making major financial decisions.
About This Biweekly Payment Calculator
Making biweekly loan payments is one of the simplest and most powerful strategies to pay off your mortgage — or any loan — years earlier and save tens of thousands in interest, completely for free.
Here's how it works: instead of making 12 monthly payments per year, you make 26 half-payments every two weeks. Because a year has 52 weeks, this equals 13 full monthly payments per year — one extra payment annually. That extra payment goes entirely toward reducing your principal, and the compounding effect over 30 years is dramatic.
How to Use This Calculator
Enter your current loan balance, interest rate, and remaining term.
Click Calculate to see both your standard monthly payment and the biweekly equivalent.
Review the interest saved and years saved from switching to biweekly payments.
Contact your lender to set up biweekly payments, or implement the strategy manually with extra principal payments.
How the Payment Formula Works
Our calculator uses the standard loan amortization formula used by all US banks, mortgage lenders, and credit unions:
// Variables: M = Monthly payment amount P = Principal (loan amount) r = Monthly interest rate (APR ÷ 12 ÷ 100) n = Total number of monthly payments (term in months)
Each payment covers two components: interest (charged on your remaining balance) and principal (which reduces your balance). In the early months, more of your payment goes toward interest. As your balance decreases, more goes toward principal — this is called front-loaded interest amortization.
Why Biweekly Payments Save You Money
Biweekly payments work on a simple mathematical advantage: paying every two weeks instead of once a month results in 26 half-payments per year — the equivalent of 13 full monthly payments instead of 12. That one extra payment goes entirely toward principal, which reduces your balance faster and saves a meaningful amount in total interest.
On a $300,000 mortgage at 7 percent over 30 years, switching to biweekly payments saves over $60,000 in total interest and shortens the loan by approximately 4 to 5 years. For auto loans and personal loans, the savings are smaller but still real. Use this calculator to see the exact impact for your loan amount, rate, and term.
Before setting up biweekly payments, confirm with your lender that the extra payment will be applied directly to principal rather than held until a full payment accumulates. Some lenders charge a fee to set up a biweekly plan — in that case, simply making one extra principal-only payment per year achieves the same result at no cost.
Biweekly payments work best for borrowers with biweekly or weekly income since payments align naturally with each paycheck. For a broader view of payoff strategies, our general Loan Payment Calculator lets you model different scenarios. Homeowners can also compare biweekly savings against the potential of a Home Equity Loan for consolidating and accelerating payoff of multiple debts simultaneously.