How Much Can I Borrow as a First Time Buyer?

One of the first questions every first-time buyer asks is: how much can I actually borrow?

It’s a natural starting point as knowing your budget helps you search with confidence and avoid falling for properties out of reach. The answer, however, is rarely a simple figure.

With multiple factors impacting first-time buyer mortgage affordability, here’s what you need to know about first time buyer borrowing in today’s UK mortgage market.

The headline borrowing rules (and what they mean in practice)

Most UK mortgage lenders use an income multiple as the starting point for first time buyer mortgage calculations. The standard range is between 4 and 4.5 times your annual gross income, though some lenders will stretch to 5 or even 5.5 times in the right circumstances.

In practical terms, if you earn £35,000 per year, you may be able to borrow somewhere between £140,000 and £157,500. On a joint application with a combined income of £65,000, that same range jumps to £260,000–£292,500. These are ballpark figures as your actual offer will depend on a much wider set of factors. However, to estimate what borrowing may look like for you, why not try our repayment calculator.

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It’s also worth noting that lenders use ‘stress testing’ rules, meaning they must check whether you could still afford repayments if interest rates were to rise. This can reduce the maximum amount some applicants are offered, but it’s important to assess.

What lenders really look at beyond your salary

Mortgage borrowing for first time buyers isn’t just about income. Lenders carry out a full affordability assessment that looks at your complete financial picture, including:

• Credit score and credit history: missed payments, defaults, or a thin credit file can reduce your borrowing power or lead to higher rates.
• Monthly outgoings: subscriptions, car finance, student loans, and even regular spending habits all count against your affordability calculation.
• Employment type: being employed full-time is viewed more favourably than being self-employed or on a zero-hours contract, though these are not barriers in themselves.
• Number of dependants: children or other financial dependants reduce how much lenders believe you can comfortably repay.
• Existing debt: credit card balances and personal loans directly reduce the mortgage amount you can access.

This is why speaking with a qualified mortgage adviser like Exe Mortgages is so valuable, because they can help you understand exactly how your profile looks to lenders before you apply.

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Deposit and Loan-to-Value (LTV): why it matters

Your deposit doesn’t just determine what’s left to borrow, it directly affects the interest rate you’ll be offered. Lenders use a measure called Loan-to-Value (LTV). This is the percentage of the property’s value that you’re borrowing. The lower your LTV, the less risk to the lender, and the better the mortgage deal you’re likely to receive.

A 5% deposit (95% LTV) will get you on the ladder, but expect higher rates and fewer product choices. A 10% deposit or more opens up significantly more options. At 15–20% or above, you’ll start accessing the most competitive rates on the market.

Practical tips to boost your deposit and borrowing potential

If you’re working towards your first home, these steps can make a meaningful difference to both your savings and the mortgage offers you receive:

• Check and improve your credit score — register on the electoral roll, avoid applying for new credit before a mortgage application, and clear any outstanding defaults.
• Reduce your visible debt — paying down credit cards and closing unused accounts can significantly improve your affordability assessment.
• Cut discretionary spending — lenders often review three to six months of bank statements, so consistent, sensible spending habits count in your favour.
• Consider opening a Lifetime ISA (LISA) — save up to £4,000 a year and receive a 25% government bonus (up to £1,000 annually) towards your first home purchase.
• Save consistently — regular monthly deposits into a dedicated savings account demonstrate financial discipline, which lenders view positively.
• Get a Decision in Principle (DIP) early — this gives you a realistic borrowing figure before you start property searching, and shows estate agents you’re a serious buyer.

First time buyer mortgage borrowing can feel complex, but it becomes much clearer once you understand what lenders are looking for. Whether you’re just starting to save or ready to apply, getting the right advice early can save you time, stress, and money.

Looking for personalised guidance? Speak to a specialist mortgage adviser today to understand exactly what you could borrow and find the best first time buyer mortgage for your situation.