Built for homeowners, not lenders
We believe every homeowner deserves clear, unbiased financial tools to make confident decisions — without wading through sales pitches or confusing spreadsheets.
Demystifying the mortgage recast
When we first heard about mortgage recasting, the information was scattered, jargon-heavy, and buried in lender brochures. We couldn't find a single clean, free tool that showed us the real numbers — so we built one.
Mortgage Recast Calculator gives you an instant, honest picture of what a lump-sum payment does to your loan: new monthly payment, total interest saved, and a full month-by-month amortization table — all calculated on your server, with no tracking, no ads, and no upsells.
We're not a bank, a broker, or a lead-generation service. We're a team that believes financial clarity is a right, not a premium feature.
Our Core Values
Transparency
Every number we show is derived from standard amortization math. No hidden adjustments, no rounded-up estimates. What you see is what your lender calculates.
Speed
You shouldn't have to wait. Results are calculated instantly on the server — no waiting for JavaScript to load, no spinners, no API calls to third parties.
Privacy
We don't store your loan numbers. We don't use cookies for tracking. Your financial data is processed and immediately discarded when the page loads.
Accessibility
Financial tools should work for everyone. Mortgage Recast Calculator runs on any device, any screen size, in any browser — no app download, no account required.
Our Team
Arjun Rao
Former mortgage analyst turned software engineer. Built Mortgage Recast Calculator after being frustrated by the lack of honest tools during his own home purchase.
Sarah Lin
CFA charterholder with 10 years in personal finance. Reviews all calculation logic and ensures our outputs match real-world lender amortization standards.
Marcus Kim
Product designer focused on making complex data easy to read at a glance. Believes great financial tools should feel calm, not overwhelming.
Priya Patel
Answers every support email personally. Previously worked as a HUD-approved housing counselor, helping first-time buyers understand mortgage options.
How the calculator works
Current balance
We calculate your outstanding balance using the standard amortization formula, factoring in your original loan amount, rate, and how many payments you've made.
Lump-sum applied
Your lump-sum is subtracted from the current balance. The new balance is then re-amortized over the same remaining term at the same interest rate — the core of a recast.
Payment recalculated
The new monthly payment is derived from the reduced principal. We compare total interest paid under both scenarios to show you exactly how much you save.
Full amortization
We generate a month-by-month table for both scenarios so you can see the exact principal, interest, and balance for every payment remaining on your loan.
Ready to run your numbers?
It takes under 30 seconds. No signup, no email, no catch.
Try the Calculator