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Mortgage calculator

See what the mortgagecould cost each month.

Change the property value, deposit, illustrative rate, term and repayment type. See how every assumption changes the estimate.

Start with the example
5 inputsProperty, deposit, rate, term and type
LiveUpdates as each assumption changes
IllustrativeNot an offer or eligibility decision
Calculate

Mortgage lab

Touch the numbers.
See the possibility.

An illustrative estimate—live, tactile and private.

Estimated monthly payment
£1,751 per month
Mortgage
£315,000
Deposit
£135,000
Total interest
£210,262
£
£100k£3m
%
10%60%
%
2%12%
years
5 years40 years

Illustrative only—not a mortgage offer. Rates, fees, taxes and eligibility vary by lender and country.

A house key and fountain pen on an open property-planning notebook
Your working estimate£1,751 a month

£315,000 mortgage · 70% LTV · repayment

Nothing here is drawn from a live lender feed.

Read the result

One useful figure.
Four visible assumptions.

The estimate is only as meaningful as the numbers beneath it. Change an input and the corresponding assumption changes here too.

Rate used
4.50%

Editable example assumption, held constant for this illustration.

Term used
25 years

300 monthly payments in the selected term.

Deposit used
30% · £135,000

Subtracted from the property value to calculate the mortgage.

Method used
Capital and interest

A standard repayment formula that reduces capital over the term.

Where the estimate stops

Where the maths ends,
your circumstances begin.

  1. 01

    Affordability

    Income, spending, other borrowing and lender affordability models are not included.

  2. 02

    Eligibility

    Credit history, property type, residency, income currency and documentation still matter.

  3. 03

    Buying costs

    Taxes, legal work, insurance, lender charges and currency changes sit outside this estimate.

Calculator FAQ

Before you use
the result.

01How is the repayment estimate calculated?

It uses the mortgage amount, monthly interest rate and number of monthly payments in the standard amortisation calculation.

02Is the illustrative interest rate a current OMF rate?

No. It is an example input for exploring the calculation, not a live rate, recommendation or lender offer.

03Why does interest-only leave capital to repay?

Because each monthly payment covers interest only. The mortgage balance is not reduced, so the original capital remains due at the end of the term.

Illustrative only—not a mortgage offer, recommendation or eligibility decision. Rates, fees, taxes and lender criteria vary.

From estimate to application

Keep the useful number.
Add the human detail.

A calculator can show the maths. An OMF broker can add your circumstances, current lender criteria and the costs around the mortgage.

£1,751 a month£315,000 mortgage · 70% LTV · repaymentIllustrative estimate