# Mortgage calculator UK: monthly repayments | ComputeNow URL: https://computenow.co.uk/mortgage-calculator/ > Work out your monthly mortgage repayments and total interest, repayment or interest-only, with fees and a year-by-year balance table. This calculator shows a worked example below. To use your own figures, add them to the URL as query parameters (listed in https://computenow.co.uk/llms.txt), for example https://computenow.co.uk/mortgage-calculator/?=. [What's Left, step 2 of 7: What does my home cost each month?](https://computenow.co.uk/money-plan/#steps) # Mortgage calculator Work out your monthly mortgage payment and the total interest over the term. Rates checked 18 October 2026 By the ComputeNow team, checked against GOV.UK and HMRC[Sources (2)](#sources)[How we calculate](https://computenow.co.uk/methodology/) Your monthly payment is £1,332.43 on a £225,000 repayment mortgage over 25 years. What you repay - Amount borrowed £225,000.00 (56%) - Interest £174,727.66 (44%) ## What the mortgage costs | Item | Total | | --- | --- | | Amount borrowed | £225,000.00 | | Interest over 25 years | £174,727.66 | | Total you repay | £399,727.66 | Your deposit is 10% of the price, a loan-to-value of 90%. This is an estimate, not financial advice. Speak to a mortgage adviser before you apply. ### Next steps - [Stamp duty calculator](https://computenow.co.uk/stamp-duty-calculator/?price=250000)The tax you pay when you buy at this price. - [Mortgage overpayment calculator](https://computenow.co.uk/mortgage-overpayment-calculator/?balance=225000&rate=5.13&years=25)See how much overpaying could save. - [Rent vs buy calculator](https://computenow.co.uk/rent-vs-buy-calculator/?price=250000&deposit=25000&rate=5.13)Compare buying with carrying on renting. Added. [See what's left each month](https://computenow.co.uk/money-plan/) [What's Left](https://computenow.co.uk/money-plan/) adds up your monthly figures from each calculator and shows what is left each month. [Your monthly payment is £1,332.43 Breakdown](#result) ## Year by year | Year | Interest paid | Capital repaid | Balance left | | --- | --- | --- | --- | | Year 1 | £11,436.44 | £4,552.66 | £220,447.34 | | Year 2 | £11,197.32 | £4,791.78 | £215,655.56 | | Year 3 | £10,945.64 | £5,043.46 | £210,612.09 | | Year 4 | £10,680.74 | £5,308.37 | £205,303.72 | | Year 5 | £10,401.93 | £5,587.18 | £199,716.54 | | Year 6 | £10,108.47 | £5,880.64 | £193,835.91 | | Year 7 | £9,799.60 | £6,189.51 | £187,646.40 | | Year 8 | £9,474.50 | £6,514.61 | £181,131.79 | | Year 9 | £9,132.33 | £6,856.78 | £174,275.02 | | Year 10 | £8,772.19 | £7,216.92 | £167,058.10 | | Year 11 | £8,393.13 | £7,595.98 | £159,462.12 | | Year 12 | £7,994.16 | £7,994.94 | £151,467.18 | | Year 13 | £7,574.24 | £8,414.87 | £143,052.31 | | Year 14 | £7,132.26 | £8,856.84 | £134,195.47 | | Year 15 | £6,667.07 | £9,322.04 | £124,873.43 | | Year 16 | £6,177.44 | £9,811.66 | £115,061.77 | | Year 17 | £5,662.10 | £10,327.01 | £104,734.76 | | Year 18 | £5,119.69 | £10,869.42 | £93,865.34 | | Year 19 | £4,548.79 | £11,440.32 | £82,425.02 | | Year 20 | £3,947.90 | £12,041.20 | £70,383.82 | | Year 21 | £3,315.45 | £12,673.65 | £57,710.17 | | Year 22 | £2,649.79 | £13,339.32 | £44,370.85 | | Year 23 | £1,949.16 | £14,039.94 | £30,330.91 | | Year 24 | £1,211.73 | £14,777.37 | £15,553.53 | | Year 25 | £435.57 | £15,553.53 | £0.00 | You pay £1,332.43 every month. In the early years most of it is interest; by the end almost all of it pays off the loan. ## How mortgage payments are worked out A repayment mortgage has the same payment every month, worked out with the standard formula: payment = P × r ÷ (1 − (1 + r)−n), where P is the amount you borrow, r the monthly rate (the yearly rate ÷ 12) and n the number of months. In the example, you borrow £225,000 (£250,000 less a £25,000 deposit) at 5.13% over 25 years: P = £225,000, r = 5.13% ÷ 12 = 0.4275%, n = 300. That gives £1,332.43 a month, and £174,727.66 of interest over the term. Each payment covers the month's interest plus some of the loan. In the first month interest is £961.88 and £370.55 goes off the balance; that share grows every month, so the balance falls faster in later years. This assumes the same rate for the whole term. Most deals are fixed for 2 to 5 years, then move to the lender's standard rate unless you remortgage. ## Common questions ### How much is a £200,000 mortgage a month? At 4.5% over 25 years a £200,000 repayment mortgage costs £1,111.66 a month. Over 30 years it is £1,013.37 a month, but you pay £31,313.94 more interest in total. ### How much interest will I pay on my mortgage? On £200,000 at 4.5% over 25 years you pay £133,499.49 in interest, so £333,499.49 in all. Overpaying, a shorter term or a lower rate all cut it. ### What is the difference between repayment and interest-only? With repayment you pay off the loan bit by bit and owe nothing at the end. With interest-only you pay just the interest, £750.00 a month on £200,000 at 4.5%, and still owe the full £200,000 at the end. ## Related calculators [Mortgage affordability calculator How much you could borrow](https://computenow.co.uk/mortgage-affordability-calculator/)[Stamp duty calculator Tax when you buy a home](https://computenow.co.uk/stamp-duty-calculator/)[Mortgage overpayment calculator Pay off your mortgage sooner](https://computenow.co.uk/mortgage-overpayment-calculator/) ## Guides and help ### Our guides [How much does it cost to buy a home? Deposit, stamp duty, mortgage and the income you need](https://computenow.co.uk/guides/cost-of-buying-a-home/)[UK interest rates and inflation today Average mortgage, savings, loan and card rates](https://computenow.co.uk/guides/uk-interest-rates-and-inflation/)[Stamp duty in 2026 across the UK SDLT, LBTT and LTT bands, first-time buyers and second homes](https://computenow.co.uk/guides/stamp-duty-uk-2026/) ### Official services and free advice [Check your Council Tax band GOV.UK: a cost to budget for in a new home](https://www.gov.uk/council-tax-bands)[Check a firm is authorised FCA register: lenders, brokers and advisers](https://register.fca.org.uk/)[Lifetime ISA GOV.UK: a government bonus for a first home or later life](https://www.gov.uk/lifetime-isa) ## Sources Each source was last checked on 18 October 2026. - [Bank of England: quoted household interest rates (September 2026)](https://www.bankofengland.co.uk/boeapps/database/FromShowColumns.asp?SearchText=IUMBV34&Travel=NIxAZx) - [MoneyHelper: Mortgage calculator guidance](https://www.moneyhelper.org.uk/en/homes/buying-a-home/mortgage-calculator) These results are an estimate, not financial advice. They use the 2026/27 rates in force on 24 October 2026 and the inputs shown, so your actual tax, pay or costs may differ. Before making a decision about your money, check the figures with HMRC or your provider, or speak to a regulated financial adviser. Free, impartial guidance is available from MoneyHelper. This page explains the rules using the 2026/27 rates in force on 24 October 2026. It is general information, not financial advice. For decisions about your own money, speak to a regulated financial adviser, or get free, impartial guidance from MoneyHelper.