First-Time Buyer Mortgage Calculator

Step 1: Annual Income What is your annual income?

Employed? Enter your annual income before tax.

Self-employed? Use your two-year average, or latest year's income if lower. Sole traders/partners: profit after expenses, before personal tax. Company directors: salary before tax plus dividends.

Buying together? Include both applicants' incomes. If you're unsure, enter your best estimate.

Step 2: Deposit How much deposit do you have available? (£)

Enter the amount you can put towards your first home, including any gifted deposit.

Keep some money aside for legal fees and other buying costs. Deposit requirements vary depending on the lender and mortgage product.

Step 3: Monthly Financial Commitment Costs What are your monthly financial commitment costs? (£)

Include monthly repayments towards credit cards, personal loans, car finance and hire purchase agreements for everyone applying.

Enter your monthly repayments rather than the total outstanding balances. Lenders will also consider your other living expenses when carrying out a full affordability assessment.

Step 4: Preferred Mortgage Term What is your preferred mortgage term in years?

If you’re unsure, enter 30 years for now. You can always adjust this to see how a different mortgage term affects your repayments.

Step 5: Name Full Name

We'll use your details to provide your mortgage estimate and follow up on your enquiry.

Step 6: Email Email Address

We'll use your email address to contact you about your mortgage estimate and borrowing options.

Only one more step before you receive your mortgage estimate.

Step 7: Phone Number Phone Number

You’re almost there. Your mortgage estimate will be displayed on the next screen. Please ensure you include the '07' prefix when entering your phone number.

By submitting, you confirm that you agree with our privacy policy and consent to us contacting you by email and phone. You can opt out at any time.

I’d like to receive mortgage news and helpful guides from Boon Brokers by email

You could borrow up to the following: £ This is an estimate based on the information you've provided. The amount you could borrow will depend on your circumstances and individual lender criteria, which our fee-free mortgage advisers will be able to explore with you. What happens next? One of our mortgage advisers will be in touch by email and phone to talk through your results and discuss your first-time buyer mortgage options. Boon Brokers is FCA regulated and provides fee-free, whole-of-market mortgage advice, with no obligation to proceed. In the meantime, why not follow us on socials? We share mortgage tips and more.

Expert-Reviewed First-Time Buyer Mortgage Calculator

Reviewed by: Gerard Boon

Managing Director, Boon Brokers

B.A (Hons), CeMAP, CeRER

Last reviewed: 28 October 2026

Gerard has reviewed this First-Time Buyer Mortgage Calculator’s calculation method, assumptions and supporting mortgage guidance for accuracy and clarity.

The results are an estimate based on the information you enter and the calculator’s assumptions. They do not constitute a mortgage offer or personalised mortgage advice.

How Much Could You Borrow as a First-Time Buyer?

Our free First-Time Buyer Mortgage Calculator can help provide you with an instant estimate of how much you could borrow towards your first home.

Simply enter a few details, including your annual income, available deposit, monthly financial commitments and preferred mortgage term, to receive an initial estimate of your borrowing potential.

You can then use this estimate as your starting point for planning your property budget.

What Happens After You Calculate How Much You Can Borrow?

Your mortgage calculator result is an initial estimate of how much you could borrow towards your first property.

While this isn’t a confirmed first-time buyer mortgage amount, it can give you a clearer idea of the property prices you may be able to afford when combined with your available deposit.

This can help you narrow down your property search, set a more realistic budget and feel better prepared for the next steps towards buying your first home.

With an idea of how much you could borrow, you can begin to explore:

Your first property budget: Combine your estimated borrowing amount with your savings or available deposit to understand which property prices may be within reach.
Your deposit options: Consider how your deposit affects your loan-to-value (LTV) ratio, which is the percentage of the property’s value you need to borrow.
Your next steps: Explore suitable mortgage lenders with your chosen mortgage broker and consider arranging an Agreement in Principle (AIP) before making offers on properties.

Remember, your calculator result is an estimate, not a confirmed mortgage offer. Your actual borrowing potential will depend on your financial circumstances and the lender’s affordability criteria.

Get Personalised Advice

Ready to Take the Next Step Towards Your First Home?

Our fee-free mortgage advisers are experts in helping first-time buyers. They can help you understand your calculator results, explore suitable lenders and first-time buyer schemes, and guide you through your first mortgage application.

For extra support with the wider homebuying process, our optional Convenience Packages, can help make things even easier by coordinating with your solicitor, surveyor and other professionals involved in your purchase.

Start My Mortgage Journey

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

Boon Brokers Limited is authorised and regulated by the Financial Conduct Authority (FCA). The Financial Services Register number is 973757. The FCA does not regulate some Buy to Let mortgage contracts. We do not charge a fee for our mortgage, insurance or equity release advice and arrangement services. Calls may be recorded for training and monitoring.