Biweekly Mortgage Calculator
Estimate mortgage interest savings and payoff acceleration from biweekly payments.
- Last reviewed
- August 26, 2026
- Cost
- Free to use
- Data
- Runs in your browser
- Reviewed by
- Anton Jonson
Biweekly Mortgage Calculator
Methodology
How this calculator handles inputs
This calculator uses the values you enter above and applies the formula explained in the guide below. Results update in the browser and are intended for quick planning, comparison, and sanity-checking.
- Use consistent periods, currencies, and units across inputs.
- Review any assumptions before using the result in a decision.
- Recalculate when rates, prices, tax rules, or business terms change.
Important note
This tool provides general planning information only. It is not tax, legal, financial, accounting, or investment advice. Check the current rules for your location and speak with a qualified professional before making a high-stakes decision.
Guide
How it works
Use this calculator to estimate the payoff impact of biweekly mortgage payments.
What this calculator does
The biweekly mortgage calculator estimates the standard monthly payment, biweekly payment, interest saved, and years saved.
Biweekly Mortgage Formula
Biweekly Payment = Monthly Payment / 2
Because there are 26 biweekly periods in a year, this can equal one extra monthly payment per year.
Example calculation
For a 300,000 mortgage at 6% over 30 years, the calculator estimates how much faster the mortgage may be repaid with biweekly payments.
When to use this calculator
- comparing monthly and biweekly payment schedules
- estimating interest savings
- planning faster mortgage payoff
- reviewing lender biweekly payment programs
FAQs
Are biweekly payments always accepted?
Not always. Check whether your lender supports true biweekly principal payments.
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