UK Mortgage Calculators
& Guides
Every tool you need for the mortgage journey, from working out what you can afford to calculating how quickly you can pay it off.
Most popular · Mortgages
Mortgage Calculator
Calculate monthly repayments, total interest, and full amortisation schedule for any UK mortgage.
Mortgage calculators
5Stamp Duty Calculator
Calculate stamp duty (SDLT) for England & NI, including first-time buyer relief.
Open calculatorMortgage Affordability
Estimate how much you could borrow based on your income and deposit, across conservative, typical, and maximum lending multiples.
Open calculatorMortgage Overpayment
See how much interest and time you save by making regular overpayments on your mortgage.
Open calculatorRent vs Buy Calculator
Compare the 10-year cost of renting versus buying a property.
Open calculatorHelp to Buy Calculator
Calculate repayments on the government Help to Buy equity loan.
Open calculatorMortgage by salary
How much you could borrow and your monthly repayments for common UK salaries.
Mortgage guides
6Guide
How UK Mortgages Work
Types of mortgage, fixed vs tracker rates, LTV and the application process.
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Guide
First-Time Buyer's Guide
From saving a deposit to getting the keys, a step-by-step walkthrough.
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Guide
Stamp Duty Guide
Rates, thresholds and relief for first-time buyers in 2026/27.
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Guide
Remortgaging Guide
When to remortgage, what costs to expect and how to switch lenders.
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Guide
Help to Buy ISA vs Lifetime ISA
Which scheme is better for saving your first-home deposit?
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Guide
What Salary Do I Need to Buy a House?
Borrowing rules, deposit requirements, and regional salary breakdowns for 2026.
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Mortgages in 2026
Getting a mortgage in 2026
How much can you borrow?
UK mortgage rates rose sharply from 2022 following Bank of England base rate increases. While rates have eased from their 2023 peak, the average two-year fixed rate in 2026 remains well above the historic lows of 2021.
Most lenders will offer between 4× and 4.5× your annual income, subject to a full affordability assessment covering income, outgoings, and existing debts. Stress testing means lenders also check you could afford repayments if the rate rose by around 3 percentage points.
Fixed vs tracker
Fixed-rate mortgages lock your rate for a set period, typically two or five years. Your monthly payment stays the same regardless of base rate moves. At the end of the fix you roll onto the lender's SVR, which is why most people remortgage at that point.
Tracker mortgages follow the Bank of England base rate plus a set margin. If rates fall, so does your payment, but you also take on the risk of rises. Trackers often have no early repayment charges, giving you flexibility to overpay or switch.
| Deposit | LTV | Rate tier |
|---|---|---|
| 5% | 95% | Highest rates, limited lender choice |
| 10% | 90% | More choice, rates improve meaningfully |
| 15–20% | 80–85% | Competitive rates, mainstream lenders |
| 25%+ | 75% or lower | Best available rates |
Common mortgage questions
What is an Agreement in Principle and do I need one?
An Agreement in Principle (AIP), also called a Decision in Principle or Mortgage in Principle, is a written indication from a lender of how much they might lend you, based on a basic assessment of your income and a soft credit check. It's not a formal offer and doesn't guarantee a mortgage. Most estate agents require one before they'll accept an offer, as it shows you're a serious buyer with access to finance.
Can I get a mortgage if I'm self-employed?
Yes, but you'll typically need at least two years of accounts or tax returns to prove your income. Lenders usually use your average net profit over those two years (or sometimes just the most recent year if it's lower). Having your accounts prepared by an accountant, a good credit history, and a larger deposit all improve your chances. Some specialist lenders cater specifically to self-employed applicants.
What is an early repayment charge (ERC)?
An ERC is a fee charged by the lender if you pay off your mortgage (or more than an allowed amount) before the end of your fixed or discounted period. They're typically 1–5% of the outstanding balance, reducing each year of the fix. For example, a 5-year fix might charge 5% in year 1, 4% in year 2, and so on. Check the ERC schedule before overpaying beyond your lender's free overpayment allowance (usually 10% of the balance per year).
Should I overpay my mortgage?
Overpaying reduces your outstanding balance, which cuts the total interest you pay and shortens your mortgage term. It makes sense if your mortgage rate is higher than the after-tax return you'd get from saving the same money. At current rates (most fixes above 4%), overpaying often beats a standard savings account after tax, compare your mortgage rate against the best available ISA or savings rates. Always stay within your lender's free overpayment limit to avoid early repayment charges.
When should I start looking to remortgage?
Start looking 3–6 months before your current deal ends. Most lenders allow you to lock in a new rate up to 6 months in advance, so if rates fall before completion you can often switch to the better deal. Leaving it until after your fix ends means you'll roll onto the lender's Standard Variable Rate (SVR), which is typically 1–2 percentage points higher than available fixed-rate deals.