Property Decision Desk

Mortgage Mechanics

Extra Payment Accelerator

See years cut and interest saved from extra monthly principal.

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Educational estimate only. Not financial, tax, lending, or real-estate advice. Markets, taxes, and local conditions vary.

How to read this decision

Most calculators stop at the monthly payment. Extra Payment Accelerator focuses on what the loan fine print does to your money. See years cut and interest saved from extra monthly principal.

Everything runs in your browser — no account, no data sent anywhere — and results update as soon as you press the button.

Methodology & next steps

This tool runs entirely in your browser. Change one input at a time, compare scenarios, and export the report before you talk to an agent or lender.

  1. Start with realistic income, price, rate, and cost assumptions for your market.
  2. Use presets or Snapshot as B to stress-test a second path.
  3. Read the verdict, charts, and schedule — then verify taxes, insurance, and comps locally.
  • Copy report or Print / PDF for a shareable decision page.
  • Save scenarios on this device or copy the share link in the address bar.
  • Export CSV/JSON when you want numbers in a spreadsheet.

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About Extra Payment Accelerator

What is Extra Payment Accelerator for?

See years cut and interest saved from extra monthly principal. It focuses on what the loan fine print does to your money, so you can compare realistic paths instead of a single optimistic listing photo.

How do I use Extra Payment Accelerator?

Fill in realistic values for your situation and run it. The output shows the key figures side by side, so rerun with different assumptions to stress-test the result.

Is Extra Payment Accelerator free?

Yes. Extra Payment Accelerator is free, needs no account, and runs entirely in your browser — your inputs are never uploaded.

Is this financial or real estate advice?

No. Extra Payment Accelerator produces educational estimates only. Markets, taxes, lending rules, and local conditions vary, so confirm big decisions with a qualified professional.