I Built a Simple Mortgage Recast Calculator to Solve a Confusing Problem

I realized something strange. Many homeowners make a lump sum payment on their mortgage, but they don’t clearly know how a recast will change their monthly payment.

Banks explain the process, but they rarely show the numbers in a simple way. People end up guessing or trying complicated formulas.

So I built a straightforward mortgage recast calculator.

You enter:

• Remaining loan balance
• Interest rate
• Remaining term
• Lump sum payment

And it instantly shows your new monthly payment and how much interest you save.

No signup. No clutter. Just clear numbers.

Right now it’s live and I’m improving the user experience step by step.

If you’ve built finance tools before, I’d love feedback on features I should add next.