Accelerated Biweekly vs Monthly Mortgage Calculator
Compare monthly, ordinary biweekly and accelerated biweekly mortgage payments with explicit nominal compounding and capped final payments. Use the example values or enter your own numbers to explore an estimate.
Currency formatting only—not an exchange-rate conversion. No country-specific tax or government rules are applied.
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Enter your details to see a personalized calculation, a simple projection, and the assumptions behind it.
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Compare, keep and export
Calculate first to compare a snapshot or export your current results. No values are sent to our server.
The PDF includes active input values and option labels, results, sources, model assumptions, and the schedule when available. Schedule periods follow the model: years, months, or actual payments.
Up to three comparison snapshots
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Share assumptions, never dollar amounts
Links include eligible rate, term or frequency assumptions only. Dollar amounts are never included. Recipients must enter their own amounts; the link will not reproduce your full financial scenario.
HOW IT WORKS
Calculation method
Calculate a monthly amortizing payment using the selected equivalent rate. Ordinary biweekly payments are monthly × 12/26; accelerated payments are monthly/2. Simulate balances with equivalent 26-period annual rates and capped final payments.
KEEP IN MIND
Assumptions & limits
Example: a 1,000 monthly payment means 461.538462 ordinary biweekly or 500 accelerated biweekly; full-year scheduled totals are 12,000 and 13,000.
26 equal payment periods per year; fixed rate throughout the modeled amortization. Confirm lender payment calendars and prepayment privileges. No penalties, taxes, insurance or fees.