Mortgage calculator
Mortgage calculator
Monthly repayments, how much you could borrow, and the stamp duty on the price you have in mind. Adjust the sliders; the figures update as you go.
Borrowing £250,000, which is 90.91% of the price
Starts at 4.85%, the midpoint of the 2-year and 5-year fixed rates lenders quoted in August 2026. The rate you are offered depends on your deposit, circumstances and the product.
Set the rate from the market, August 2026
Average rates lenders quoted at 75% loan to value, with Bank Rate at 3.75%. Source: Bank of England.
Monthly repayment
a month
- Borrowing
- £250,000
- Total repaid over the term
- £431,913
- Total interest
- £181,913
- Loan to value
- 90.91%
If rates rose
- At 5.85%£1,588 (+£148)
- At 6.85%£1,743 (+£303)
- At 7.85%£1,905 (+£465)
These figures are for illustration only. They are not a quote, an offer or advice. The rate and the amount you could borrow depend on your circumstances and on the lender.
Your home may be repossessed if you do not keep up repayments on your mortgage.
Speak to an adviser about thisGross salary before tax. Lenders may count bonuses and overtime differently.
Leave at zero for a single application.
Most lenders lend up to four and a half times income; some go higher for certain professions.
You could borrow around
- Plus your deposit
- £25,000
- Property price up to
- £227,500
- Loan to value
- 89.01%
- Monthly repayment at the assumed rate
- £1,166 a month
These figures are for illustration only. They are not a quote, an offer or advice. The rate and the amount you could borrow depend on your circumstances and on the lender.
Your home may be repossessed if you do not keep up repayments on your mortgage.
Check what a lender would actually offerEngland and Northern Ireland only. Wales charges Land Transaction Tax and Scotland charges Land and Buildings Transaction Tax, with different bands. Rates checked on 2026-09-02.
Stamp duty to pay
- Effective rate
- 1.36%
- 0% on £125,000
- £0
- 2% on £125,000
- £2,500
- 5% on £25,000
- £1,250
These figures are for illustration only. They are not a quote, an offer or advice. The rate and the amount you could borrow depend on your circumstances and on the lender.
Your home may be repossessed if you do not keep up repayments on your mortgage.
Talk to an adviser about the whole costWorked examples
What common amounts cost each month
Over 25 years, on a repayment basis, with the interest-only figure alongside. The middle column is the average fixed rate lenders quoted in August 2026 (Bank of England); the others sit half a point either side.
| Borrowing | At 4.35% | At 4.85% | At 5.35% |
|---|---|---|---|
| £150,000 | £821 £544 interest only | £864 £606 interest only | £908 £669 interest only |
| £250,000 | £1,368 £906 interest only | £1,440 £1,010 interest only | £1,513 £1,115 interest only |
| £350,000 | £1,916 £1,269 interest only | £2,016 £1,415 interest only | £2,118 £1,560 interest only |
Next step
Which mortgage are you looking at?
First-time buyer
With so much to weigh up, the first step is the hard one. We walk you through the whole process, from working out what you can afford to collecting the keys.
Read about itMoving home
Moving is exciting and the mortgage is the part most people dread. Even if you have done it before, knowing every option matters.
Read about itRemortgage
Switching to a better deal, coming to the end of your current term, or borrowing against your home. A remortgage can do all three, and timing is everything.
Read about itBuy-to-let
A buy-to-let mortgage is for a property you intend to rent out rather than live in. Lenders assess it on the rent it will earn as well as on you.
Read about itGood to know
Calculator questions
Where does the starting interest rate come from?
From the Bank of England, which publishes the average rates lenders quoted each month. The slider starts at the midpoint of the 2-year and 5-year fixed averages at 75 per cent loan to value for August 2026, and the buttons under it set the 2-year, 5-year and standard variable averages. It is a market average, not a rate you have been offered; the site refreshes it every week.
Where do the area prices come from?
From the HM Land Registry UK House Price Index, which publishes average sold prices for every local authority about two months in arrears. Type a postcode on the borrowing tab and the calculator shows the latest averages for that area, including what first-time buyers paid. The postcode is used for the lookup and not stored. Contains HM Land Registry data, Crown copyright and database right, licensed under the Open Government Licence v3.0.
How accurate is the repayment figure?
The arithmetic is the standard formula every lender uses, so for the loan, rate and term you enter it is exact. What it cannot know is the rate you will actually be offered, which depends on your deposit, your circumstances and the lender.
How much can I really borrow?
The affordability tab uses an income multiple, which is how most lenders set their ceiling. In practice they also look at your outgoings, credit history and how the payment would cope if rates rose. An agreement in principle from a lender is the only reliable answer.
Does the stamp duty tab cover Wales and Scotland?
No. It calculates Stamp Duty Land Tax for England and Northern Ireland. Wales charges Land Transaction Tax and Scotland charges Land and Buildings Transaction Tax, both with different bands.
Do you store what I type into the calculator?
No. The figures stay in your browser and in the page address so you can share or bookmark them. A postcode you look up is sent to our server only to find the area and is not kept. Nothing else reaches us until you choose to ask for a quote.
Want the figure a lender would actually offer?
Tell us the numbers you tried and we will come back within one working day with what is realistic.
Your home may be repossessed if you do not keep up repayments on your mortgage.
Our mortgage broker fee starts from £495. The exact fee depends on your circumstances and is agreed with you before you commit to anything.