UK Mortgage Calculator
Instantly estimate your monthly repayments, total interest, and Loan-to-Value (LTV) to plan your UK home purchase with confidence.
Mortgage Details
Enter your property and loan details to calculate your monthly repayments
The total purchase price of the property.
This is a 10.0% deposit (90.0% LTV).
Your expected annual mortgage interest rate.
The length of time over which you will repay the loan.
Repayment pays off the loan over time. Interest-only requires a separate plan to repay the capital at the end.
Calculation Results
Your estimated mortgage costs and Loan-to-Value
Enter your property details above and click Calculate Repayments to reveal your monthly costs.
Typical UK Mortgage LTV Bands
Your Loan-to-Value (LTV) ratio is the most critical factor in determining the interest rates you will be offered. Lower LTVs unlock significantly better deals.
| Deposit Size | Loan-to-Value (LTV) | Typical Rate Availability | Best For |
|---|---|---|---|
| 5% | 95% | Limited, higher rates | First-time buyers getting on the ladder |
| 10% | 90% | Moderate selection | Buyers with a modest savings history |
| 15% | 85% | Good selection of rates | Standard home movers |
| 20% | 80% | Very competitive rates | Buyers seeking lower monthly costs |
| 25%+ | 75% or lower | Best market rates | Those with substantial savings or equity |
UK Mortgage FAQ
Everything you need to know about UK mortgage calculations, deposits, and repayment types.
A lower LTV ratio is always better as it secures you cheaper interest rates. An LTV of 80% or lower (meaning a 20%+ deposit) is generally considered good and will give you access to the most competitive mortgage deals in the UK market.
With a repayment mortgage, your monthly payments cover both the interest and a portion of the capital, meaning you will own your home outright at the end of the term. With an interest-only mortgage, you only pay the interest each month, and must repay the full capital amount at the end of the term through other means (e.g., selling the property or an investment plan).
The minimum deposit for a UK mortgage is typically 5% of the property’s value (a 95% LTV mortgage), often supported by government schemes like the Mortgage Guarantee. However, saving a larger deposit (10%, 15%, or 20%+) will significantly reduce your monthly repayments and give you access to much lower interest rates.
No. This calculator focuses purely on your core monthly mortgage repayments and total interest based on the loan amount, rate, and term. It does not include Stamp Duty Land Tax (SDLT), arrangement fees, valuation fees, or buildings insurance, which should be budgeted for separately.