Explore by subject

A calculator for every kind of question.

Start with a subject, then narrow down to the exact tool you need.

M 6 tools live

Mortgage & Home

Mortgage and home

Explore Mortgage & Home →

UK finance calculators

Work out what you can borrow and what you’ll repay

Mortgage and home-finance calculators built around how lending works in the UK, in pounds sterling. Swap the example figures for your own and see the result change as you go.

Results are estimates for planning. They are not financial advice, a mortgage offer or a promise that a lender will accept you.

Start with your question

  • What will my monthly payment be? Use the mortgage repayment calculator.
  • How much could I borrow? The affordability calculator works back from your income and outgoings.
  • How much deposit do I need? The deposit calculator shows your loan-to-value at different deposits.
  • Should I remortgage? Compare your current deal with a new rate, including fees.
  • How much of my home do I own? The home equity calculator shows your equity and current LTV.

Buying a home? Run the numbers through more than one calculator. Repayments, borrowing and deposit each tell part of the story.

More UK calculators

Borrowing, saving, pensions and budgets

Mortgages and property

Repayments, borrowing, remortgage costs, deposits, equity and loan-to-value.

Loans and borrowing

See how the amount, rate, term and overpayments change what a loan costs you in total.

Savings and interest

Find out how long a savings goal will take with regular deposits and compound interest.

Pensions and investing

Try different contribution, growth and inflation figures. Returns are never guaranteed.

Income, tax and budgeting

Work out take-home pay and see where your money goes each month.

Business and currency

VAT, margins, markups, percentages and currency conversions.

Getting a result you can trust

1

Use real figures

Take balances, rates and fees from your latest statement or a lender’s illustration. The example values are only there to show how the calculator works.

2

Check what each box asks for

Annual or monthly rate? Gross or take-home pay? Years or months? Is the arrangement fee paid upfront or added to the loan? Small mix-ups make big differences.

3

Test a tougher scenario

Lenders check whether you could still pay if rates rose, and you should too. Try a higher rate, a shorter term and higher bills before settling on a number.

Rates and terms worth knowing

AER, APR and APRC

AER is used on savings. It shows what you’d earn over a year once compounding is counted, so an account that pays monthly can be compared fairly with one that pays annually.

APR is used on personal loans and credit cards. It includes interest and compulsory fees. The advertised “representative APR” only has to be offered to at least 51% of accepted applicants, so your rate could be higher.

APRC is used on mortgages and other loans secured on your home. It reflects the total cost over the full term, including fees and the rate you move onto when an initial deal ends.

Compare APR with APR and APRC with APRC. Mixing them up gives a misleading picture.

Simple interest, compound interest and amortisation

Simple interest is charged on the original amount only. Compound interest is also charged on interest that has already been added. Amortisation is how a repayment mortgage works: each monthly payment covers that month’s interest and pays off a little of the balance, so the debt reaches zero by the end of the term.

Why your lender’s figure may be different

Lenders differ in when they charge interest, how they handle fees, how they round and who they’ll lend to. Rates, tax rules and investment returns also change over time. A calculator gives you a solid estimate, not the figure in your contract.

A calculator isn’t advice

These tools can’t judge whether a product suits you, check your eligibility or account for every tax and legal consequence.

For free, impartial guidance, try MoneyHelper, the government-backed service. For a big or hard-to-reverse decision, speak to an FCA-authorised mortgage or financial adviser.

Your home may be repossessed if you do not keep up repayments on your mortgage.