User guide
Mortgage Calculator
Estimate mortgage payments, interest and loan-to-value with the Mortgage Calculator.
What this tool does
Estimates repayment and interest-only payments plus loan-to-value (LTV) from property value, deposit, rate and term.
Understanding your mortgage results
Tap a number to explore each part of the screen.
Click a marker on the screenshot to learn what each part does.
Property value
The purchase price or current market value used to size your loan.
Use a realistic valuation — overstating it can underestimate your deposit need.
Understanding inputs
| Property value | Purchase price or current value. |
|---|---|
| Deposit | Cash you contribute upfront. |
| Interest rate | Annual rate for illustration. |
| Mortgage term | Loan length in years. |
Understanding results
Compare the monthly payment with your House Budget. LTV helps you understand equity — lower LTV often attracts better rates in real lending, but this tool only estimates.
Worked example
Property value: £350,000
Deposit: £70,000
Mortgage amount: £280,000
Monthly payment: See app estimate
LTV: 80%
Frequently asked questions
Is this a mortgage offer?
No. Figures are for planning only, not lending advice.
Does it include fees?
Add stamp duty, legal fees and insurance separately.
Can I use estimated property values?
Yes for early planning.
What is a good LTV?
Below 80% is common for better rates, but products vary.
How often should I recalculate?
When rates, property value or deposit plans change.
Download MoneyMap Pulse
Try this tool on Android and build your financial picture step by step.
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