| Year | Interest | Principal | Balance |
|---|---|---|---|
First-time buyers working out affordability. Before you start viewing properties, use this calculator to understand what monthly payments you'd face at different price points. The affordability checker tab shows how much you could borrow based on your income. a good starting point before speaking to a mortgage broker.
Comparing mortgage deals. Got two quotes with different rates and terms? The Compare tab puts them side by side so you can see the total cost of each deal over the full term. A lower rate with a longer term isn't always cheaper in the long run.
Planning overpayments. If you're already on a mortgage and have some spare cash, the Overpay tab shows how much interest you'd save by making extra payments. Even small regular overpayments can knock years off your mortgage and save thousands in interest.
The main mortgage calculation doesn't, but there's a dedicated Stamp Duty tab. It calculates the stamp duty for any property price in England and Northern Ireland, including the surcharges for additional properties. It uses current HMRC rates and thresholds.
The calculator uses standard UK mortgage formulas with monthly compounding. The results are estimates for illustration purposes. your actual payments may differ due to fees, daily interest calculation, and your lender's specific terms. Always confirm with your lender or mortgage broker.
Generally, the lower your LTV, the better the interest rate you'll be offered. Below 60% LTV gets the best rates. 75–80% LTV is typical for first-time buyers. Above 90% LTV means higher rates and fewer deals available. Aim for the lowest LTV you can manage.
Yes. you can generate a PDF report with your mortgage summary and full amortization schedule. The report is created entirely in your browser and downloaded directly to your device. Nothing is sent to any server.
The amortization schedule shows how each payment is split between interest and principal over the life of the mortgage. In the early years, most of your payment goes towards interest. Over time, more goes towards paying off the actual loan. The schedule helps you understand the true cost of borrowing.
Absolutely. All calculations run entirely in your browser. The numbers you enter never leave your device. they're not sent to any server. The PDF report is also generated locally in your browser. We don't track, store, or have access to your financial data.
Most UK mortgages allow you to overpay up to 10% of the outstanding balance each year without penalty. The Overpay tab shows how regular or one-off overpayments reduce your total interest and shorten your mortgage term. Even £100 extra per month can save you thousands.
Most online mortgage calculators are run by comparison sites that want to sell you a mortgage. They track your data, require your email, and bombard you with calls. This one is different. it works entirely in your browser, works offline, and doesn't ask for any personal information. No account, no email, no tracking.
It also goes beyond a simple monthly payment figure. With stamp duty, overpayment analysis, deal comparison, and affordability checking all built in, it's a complete mortgage planning tool for UK buyers.
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