Calculators
Simple calculators to help you understand the numbers. They do not tell you what you should borrow or which mortgage to choose.
Mortgage & LTV Calculator
See how the property price, deposit, interest rate and term affect your loan-to-value (LTV) and monthly repayments. Free, no sign-up, nothing is sent anywhere.
Your figures
Mortgage amount
Calculated automatically: property price − deposit.
Type any rate you want to test. We do not show live mortgage rates.
Results
Illustrative estimatesMonthly repayment
£1,500.75
Repayment · 4.5% · 25 years
LTV
90%
Higher deposit = lower LTV.
Property price
£300,000
Deposit
£30,000
10%
Mortgage required
£270,000
Interest rate
4.5%
Mortgage term
25 years
Total repayment over term
£450,224
Total interest over term
£180,224
Assumes the same interest rate for the whole term. In practice rates usually change after an initial fixed or tracker period, and fees are not included.
What is LTV?
LTV (loan-to-value) is the mortgage as a percentage of the property price: mortgage ÷ price × 100. For example, a £270,000 mortgage on a £300,000 property is 90% LTV.
A lower LTV often gives access to more mortgage products, but no particular LTV guarantees a mortgage or an interest rate. Each lender makes its own decision.
Quick LTV scenarios
Based on your property price of £300,000.
| Deposit | Deposit £ | Mortgage | LTV |
|---|---|---|---|
| 5% | £15,000 | £285,000 | 95% |
| 10% (closest to your deposit) | £30,000 | £270,000 | 90% |
| 15% | £45,000 | £255,000 | 85% |
| 20% | £60,000 | £240,000 | 80% |
| 25% | £75,000 | £225,000 | 75% |
| 40% | £120,000 | £180,000 | 60% |
Higher deposit = lower LTV.
What if the interest rate changes?
Estimated monthly repayments on your mortgage amount and term at higher rates. This is an illustration to show sensitivity to rates, not a lender's stress test.
| Interest rate | Monthly | Change |
|---|---|---|
| 4.5%your rate | £1,501 | — |
| 5.5%+1% | £1,658 | +£157 |
| 6.5%+2% | £1,823 | +£322 |
| 7.5%+3% | £1,995 | +£495 |
Term comparison
Approximate monthly repayments on your mortgage amount and rate over different terms. Not every term is available to every borrower; lenders set their own limits.
| Term | Monthly |
|---|---|
| 20 years | £1,708 / month |
| 25 years | £1,501 / month |
| 30 years | £1,368 / month |
| 35 years | £1,278 / month |
This calculator provides illustrative estimates only. It is not mortgage advice and does not confirm how much you can borrow, the interest rate you may receive or whether a lender will approve an application. Speak to an appropriately authorised mortgage adviser for advice based on your circumstances.
Abbreviations: LTV — loan-to-value. AIP / DIP — Agreement in Principle / Decision in Principle: a lender's early indication of how much it may lend, not a mortgage offer.
Deposit calculator
| Deposit % | Deposit | Mortgage needed |
|---|---|---|
| 5% | £12,500 | £237,500 |
| 10% | £25,000 | £225,000 |
| 15% | £37,500 | £212,500 |
| 20% | £50,000 | £200,000 |
| 25% | £62,500 | £187,500 |
I have a deposit of…
Approximate maximum property price
£200,000
This only shows the price your deposit would cover at that percentage. Whether you can borrow the rest depends on lenders' affordability checks and criteria.
Purchase cost estimator
Edit every figure to match the quotes you receive. Amounts start at zero — we do not assume typical fees.
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About property tax
Whether you pay tax, and how much, depends on the price, where in the UK you buy and whether you are a first-time buyer. Rules change, so use the official calculator:
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Total cash needed
£0