UK House Loan Calculator
Estimate monthly mortgage payments, total interest, and loan-to-value (LTV) in seconds.
How to use this house loan calculator UK tool
If you're planning to buy a home in England, Scotland, Wales, or Northern Ireland, this calculator gives you a quick estimate of your monthly mortgage costs. Enter the home price, your deposit, the interest rate, and mortgage term. The calculator then estimates:
- Loan amount (how much you borrow)
- Loan-to-value (LTV)
- Monthly payment
- Total interest over the term
- Total amount paid
What the results mean
Repayment mortgage
With a repayment mortgage, each monthly payment includes both interest and a piece of the loan principal. Over time, your balance drops to zero (assuming all payments are made in full and on time).
Interest-only mortgage
With interest-only, your monthly payment covers interest only. The original borrowed amount usually remains outstanding and must be repaid at the end of the term. This can create lower monthly payments but a large final balance.
Example scenario
Say you buy a property for £350,000, put down a £70,000 deposit, and borrow £280,000 for 30 years at 4.5%. Even a small rate change (for example 4.5% to 5.0%) can increase the monthly payment significantly. This is why running different scenarios is so useful before you make an offer.
Typical UK LTV bands
| LTV Band | Deposit Needed | Typical Impact |
|---|---|---|
| 95% LTV | 5% deposit | Higher rates, stricter affordability checks |
| 90% LTV | 10% deposit | Improved rates vs 95% |
| 85% LTV | 15% deposit | Often better product choice |
| 80% LTV | 20% deposit | Strong rates in many market conditions |
| 75% LTV and below | 25%+ deposit | Usually most competitive pricing |
Costs beyond the mortgage payment
Your monthly mortgage is only one part of your housing budget. UK buyers should also account for:
- Stamp Duty Land Tax (SDLT) in England/Northern Ireland (or equivalent taxes in Scotland/Wales)
- Solicitor/conveyancing fees
- Survey and valuation fees
- Mortgage arrangement/product fees
- Buildings insurance (required by lenders)
- Service charges/ground rent for leasehold properties
What affects affordability in the UK
Income multiples
Many lenders use an income multiple (often around 4x to 4.5x household income, though this varies). If your required loan is much higher, approval may be difficult without stronger income, lower debts, or a larger deposit.
Stress testing
Lenders may test whether you can still afford payments if rates rise. So even if this calculator says payments look manageable today, lender affordability checks may use a higher “stress rate.”
Credit profile and commitments
Existing loans, car finance, credit card balances, childcare, and credit history can all influence what you can borrow.
Quick tips to improve your mortgage options
- Save for a bigger deposit to reduce your LTV.
- Reduce unsecured debt before applying.
- Check your credit report and correct errors early.
- Compare fixed and tracker products carefully.
- Speak to a whole-of-market broker for tailored product matching.
Final note
This house loan calculator UK page is designed for planning and education. It gives realistic estimates, but it is not a formal mortgage offer. Always confirm exact costs with a lender or broker and include all purchase-related fees in your full home-buying budget.