Mortgage calculators
Mortgage Repayment Calculator
Estimate how the mortgage amount, assumed interest rate and term could affect monthly repayments and the overall cost of a repayment mortgage.
This is an illustrative estimate, not a mortgage quote or personalised advice.
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Your estimated mortgage repayment
Enter a mortgage amount above £0 to see your estimated capital-and-interest repayment, interest-only comparison, and rate-sensitivity illustration.
This is an illustrative repayment estimate based on a repayment mortgage and assumes the interest rate remains the same for the full term. It does not include every fee, insurance cost or change that may affect a mortgage. A Mortgage and Protection Advisor can explain the options and costs relevant to your circumstances.
Worked repayment examples
Illustrative monthly repayments across UK loan amounts and terms
Homebuyers and homeowners frequently compare how a specific mortgage balance—such as a £70,000, £90,000, £120,000 or £250,000 mortgage—changes across a 20-year, 25-year or 30-year repayment term. The table below uses the same capital-and-interest formula as our interactive calculator at an assumed illustrative interest rate of 4.8%.
| Mortgage amount | 20-year term (monthly) | 25-year term (monthly) | 30-year term (monthly) | Total interest (25 yrs) |
|---|---|---|---|---|
| £70,000 | £454.27 | £401.10 | £367.27 | £50,329 |
| £90,000 | £584.06 | £515.70 | £472.20 | £64,709 |
| £100,000 | £648.96 | £573.00 | £524.67 | £71,899 |
| £120,000 | £778.75 | £687.60 | £629.60 | £86,279 |
| £150,000 | £973.44 | £859.50 | £787.00 | £107,849 |
| £200,000 | £1,297.91 | £1,145.99 | £1,049.33 | £143,798 |
| £250,000 | £1,622.39 | £1,432.49 | £1,311.66 | £179,748 |
Figures are illustrative capital-and-interest repayment calculations assuming a constant 4.8% annual interest rate over the full term. They exclude product arrangement fees, valuation fees, legal costs, buildings insurance and future interest-rate changes after an initial fixed or tracker period ends.
How does our repayment calculator work?
This calculator uses the mortgage amount, interest rate, and term you enter to estimate your monthly repayment. It assumes you make a repayment mortgage payment every month and that the interest rate stays the same for the full term.
What is a mortgage repayment?
A mortgage repayment is the regular amount you pay to your lender. With a repayment mortgage, each payment covers the interest due and pays off part of the money you borrowed. With an interest-only mortgage, the monthly payment covers only the interest charge and you must maintain a separate, credible repayment strategy to clear the original capital at the end of the term.
How do mortgage interest rates and terms work together?
Interest is the cost of borrowing money. Extending a mortgage term—for example from 20 years to 30 years—reduces the monthly repayment, but increases the number of months over which interest is charged, raising the total amount repaid overall. Conversely, choosing a shorter term or making permitted mortgage overpayments can reduce the total interest bill if the higher monthly commitment is comfortably affordable.
Putting the estimate into your wider mortgage plan
Monthly repayments are only one part of choosing a suitable mortgage. Whether you are buying your first home, moving house, reviewing a remortgage or product transfer, or comparing fixed vs variable mortgages, you should also budget for arrangement fees, conveyancing, surveys, property transaction taxes, buildings insurance, Council Tax and routine maintenance.
Mortgage repayment questions
Is this a mortgage quote?⌄
No. This is an illustrative estimate based on the figures entered, not a mortgage quote or personalised recommendation.
Does the estimate include every cost?⌄
No. Mortgage fees, insurance, legal costs and future rate changes may affect the overall cost.
What happens if the interest rate changes?⌄
A different interest rate can change both the monthly repayment and total amount repaid.
Can I reduce my monthly repayment?⌄
Changing the term may reduce a monthly payment, but can increase the total interest paid.
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Put the figures into the context of your circumstances.
A calculator can help you explore a scenario, but it cannot assess your full mortgage circumstances. Speak to a Mortgage and Protection Advisor about the questions behind your estimate.
Your home may be repossessed if you do not keep up repayments on your mortgage.