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Mortgage Calculator UK

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Use the mortgage calculator above to estimate your monthly mortgage payments in seconds. Enter your property price, deposit, mortgage term, and interest rate. The calculator will show you a breakdown of your monthly repayments and the total amount you pay over the life of the loan.

Whether you are buying your first home, moving house, or remortgaging, this UK mortgage calculator gives you a clear starting point. It helps you understand what you can realistically afford before you speak to a lender.

Using the calculator does not affect your credit score. No personal data is sent to any lender or credit agency.

Use Our Mortgage Calculator to See How Much You Could Borrow

The calculator estimates how much you could borrow based on your income, deposit, and chosen mortgage term. Most UK lenders offer between 4 and 4.5 times your annual salary, though some stretch to 5 or even 6 times in certain cases.

To get a quick estimate:

  1. Enter your annual income (before tax)
  2. Add a second income if you are applying jointly
  3. Set your deposit amount
  4. Choose a mortgage term (typically 25 or 30 years)
  5. Enter the interest rate you expect to pay

The result shows your estimated monthly repayments and the total cost over the full term.

Are bonuses included? Some lenders count regular bonuses or overtime toward your income, but usually only a percentage. For a conservative estimate, use your base salary only.

How much deposit do you need? A minimum 5% deposit is common in the UK. A larger deposit (10%, 15%, or 20%) usually unlocks lower interest rates and reduces your monthly payments.

Monthly Mortgage Payments and Interest Rate

Your monthly mortgage payments depend on three things: the amount you borrow, the interest rate, and the mortgage term. Even small changes in any of these can shift your repayments significantly.

How Mortgage Interest Rates Affect Your Monthly Mortgage Repayments

Mortgage interest is the cost your lender charges for borrowing money. It is calculated as a percentage of the outstanding loan balance each year, then divided into monthly amounts.

Here is a rough example of how rates change your payments on a £200,000 repayment mortgage over 25 years:

  • 3% interest rate: approximately £948 per month
  • 4% interest rate: approximately £1,056 per month
  • 5% interest rate: approximately £1,170 per month
  • 6% interest rate: approximately £1,289 per month

A single percentage point increase on £200,000 can add over £100 to your monthly repayments. Over a 25 year term, that adds up to tens of thousands of pounds in extra interest.

The Bank of England base rate influences what lenders charge. When the base rate rises, most mortgage rates follow. When it falls, rates often drop too, though not always by the same amount or at the same speed.

Mortgage Rate Options for a New Mortgage

When you take out a mortgage, you choose a rate type. The main options in the UK are:

  • Fixed-rate mortgage: Your interest rate stays the same for a set period (commonly 2 or 5 years). Your monthly repayments stay predictable.
  • Variable rate (tracker): Your rate moves directly with the Bank of England base rate. Payments can go up or down.
  • Standard variable rate (SVR): The lender's default rate, usually higher than fixed or tracker deals. You often move to this when a fixed deal ends.
  • Discount variable rate: A set discount below the lender's SVR for a fixed period.

Fixed-rate mortgages are the most popular choice in the UK because they offer payment certainty. Tracker mortgages can be cheaper when rates are falling but carry more risk if rates climb.

Mortgage Repayment Calculator: Calculator to See How Much You Pay Over Time

The repayment calculator shows you the total cost of your mortgage across the full term, not just the monthly figure. This includes the original amount you borrow plus every pound of interest.

On a repayment mortgage (the most common type), each monthly payment covers some interest and some of the loan itself. In the early years, most of your payment goes toward interest. Over time, more goes toward reducing the balance.

On an interest-only mortgage, you pay just the interest each month. The original loan balance stays the same and must be repaid in full at the end of the term.

Much You Can Borrow Based on Your Income

Lenders assess how much you can borrow using affordability checks. These go beyond the simple salary multiple.

They consider:

  • Your gross annual income (and a partner's, if applying jointly)
  • Regular outgoings: childcare, loans, credit card payments, living costs
  • Your deposit size
  • The mortgage term and type of mortgage
  • Future rate increases (stress testing)

A common guideline is 4 to 4.5 times your combined annual salary. Someone earning £50,000 might borrow roughly £200,000 to £225,000. If you had a baby or changed jobs, for example, a lender would want to know you could still afford your mortgage repayments.

Use the calculator to test different income and deposit combinations. It gives you a realistic range before you apply.

Early Repayment Charges and Mortgage Overpayment Calculator

Early repayment charges (ERCs) apply if you pay off your mortgage early or overpay beyond your lender's limit during a fixed or discounted rate period. ERCs are typically 1% to 5% of the outstanding balance, depending on how far into the deal you are.

Most lenders allow overpayments of up to 10% of your outstanding balance each year without penalty. Overpaying even a small amount regularly can:

  • Reduce the total interest you pay
  • Shorten your mortgage term
  • Lower your outstanding balance faster

Use the mortgage overpayment calculator to see how extra payments change your total cost and repayment timeline. Even £100 extra per month can save thousands in interest over a 25 year term.

Always check your mortgage terms before overpaying. The calculator estimates savings but cannot account for your specific lender's rules.

Remortgage Calculator: Estimate Repayment on a Remortgage

Remortgaging means switching your existing mortgage to a new deal, either with your current lender or a different one. People remortgage for several reasons:

  • Their fixed-rate period is ending and they want to avoid the lender's SVR
  • Interest rates have dropped and a better deal is available
  • Their property has increased in value, giving them access to lower rates
  • They want to release equity for home improvements or other purposes

Use the remortgage calculator to compare your current monthly repayments with what you might pay on a new deal. Enter your remaining balance, the new interest rate, and your preferred term.

How long does the remortgage process take? Typically 4 to 8 weeks, though it can vary. Start looking for deals around 3 to 6 months before your current rate expires.

Can I get a cheaper mortgage if my property has increased in value? Yes, possibly. A higher property value means a lower loan-to-value (LTV) ratio, which is the percentage of the property's value you still owe. Lower LTV ratios often qualify for better interest rates.

Can I remortgage for home improvements? Yes. Many homeowners remortgage to borrow additional funds for renovations. The lender will assess your affordability for the new, larger amount.

First Time Buyer Mortgage Payments

Buying your first home involves different considerations than moving or remortgaging. As a first time buyer, you may have access to government schemes and specific lender products designed to help with smaller deposits.

Find Out How Much a First Time Buyer Could Borrow

First time buyers can typically borrow 4 to 4.5 times their income, the same as other borrowers. The key challenge is usually the deposit.

Here is what to keep in mind:

  • Minimum deposit: 5% is common, but 10% or more unlocks significantly better rates
  • Stamp duty: First time buyers in England and Northern Ireland pay no stamp duty on properties up to £425,000 (as of the current threshold, but check GOV.UK for updates)
  • Additional costs: Solicitor fees, surveys, and moving costs typically add £2,000 to £5,000 on top of your deposit
  • Mortgage term: Choosing a longer term (30 or 35 years) lowers monthly payments but increases total interest paid

Use the calculator to test different scenarios. Try adjusting your deposit, term, and interest rate to see how each one affects your monthly payments. This helps you set a realistic budget before you start viewing properties.

Mortgage Interest and Affordability

Mortgage affordability is about more than just the monthly payment number. Lenders stress-test your application against higher interest rates to confirm you could still manage if rates rise.

Your mortgage affordability depends on:

  • Total household income
  • Existing debts and commitments
  • Living expenses and dependents
  • The type of mortgage and term you choose
  • Current and projected interest rates

How Much You Could Save With Lower Mortgage Interest Rates

The amount of interest you pay over your mortgage term is often substantial. On a £250,000 mortgage over 25 years, the difference between a 4% and a 5% rate is roughly £35,000 in total interest.

Ways to access lower rates:

  • Save a larger deposit. Each LTV band (90%, 85%, 80%, 75%) tends to offer progressively better rates.
  • Improve your credit score. Pay bills on time, reduce outstanding debt, and correct errors on your credit report.
  • Choose the right term. Shorter fixed-rate periods (2 years) sometimes have lower rates, but you remortgage more often. Longer fixes (5 or 10 years) offer stability at a slightly higher rate.
  • Shop around. Rates vary between lenders. A mortgage broker can compare deals across the market.

Use the calculator to model different interest rates against your borrowing amount. Even a 0.25% difference matters over a 25 year mortgage.

Mortgage Finder: Apply for a Mortgage

When you are ready to move from estimating to applying, the next step is to find the right mortgage product. A mortgage finder service (offered by brokers and comparison sites) searches available deals based on your circumstances.

Before you apply for a mortgage, gather:

  • Proof of income (payslips, tax returns if self-employed)
  • Bank statements (usually 3 to 6 months)
  • ID and proof of address
  • Details of your deposit source
  • Information about existing debts or financial commitments

A mortgage application involves a hard credit check, which does appear on your credit file. This is different from using a calculator, which has no credit impact at all.

Mortgage Repayment Calculator vs Mortgage Finder

These serve different purposes at different stages:

  • Mortgage repayment calculator: A planning tool. It estimates monthly repayments, total interest, and how much you can borrow based on your income. Use it early and often to test scenarios. No personal data required. No credit impact.
  • Mortgage finder: A product search. It matches you with actual mortgage deals from lenders. It may require personal details and can involve a soft or hard credit check depending on the provider.

Start with the calculator to understand your budget. Move to a mortgage finder when you are confident in your price range and ready to compare real products.

Monthly Mortgage Repayments Are Estimates

The figures from this mortgage calculator are estimates based on the inputs you provide. They give you a useful starting point for planning, but they are not a mortgage offer or a guarantee of what any lender will charge.

Actual mortgage repayments depend on:

  • The specific lender's rates and criteria
  • Your full financial assessment (income, debts, credit history)
  • Property valuation
  • The type of mortgage product you choose
  • Fees added to the loan (arrangement fees, valuation fees)

Interest rates change regularly. A rate you see today may not be available when you apply. Always confirm current rates directly with lenders or a qualified mortgage broker.

This calculator is a planning aid. It does not constitute financial advice. For decisions about buying a property, remortgaging, or any mortgage commitment, consult a qualified mortgage adviser who can assess your individual circumstances.