You can generally afford a house priced at your cash deposit plus 4 to 4.5 times your gross annual income. For a couple earning £60,000 combined with a £20,000 deposit, this typically suggests a maximum property value of £260,000 to £290,000. However, the final figure depends on your credit score, existing debts, and monthly living expenses.
How do mortgage lenders calculate your borrowing limit?
Lenders primarily use an income multiple, typically ranging from 4 to 4.5 times your annual salary. If you earn £35,000, a lender might offer you between £140,000 and £157,500. For joint applications, they combine your gross incomes before applying the same multiplier. Some specialist lenders may offer up to 5 or even 5.5 times salary for high earners in specific professions, such as medicine or law, but these are less common for the average buyer.
Beyond the simple multiplier, banks conduct an affordability assessment. They look at your bank statements to see how much you spend on essentials and discretionary items. If you have significant car finance payments, childcare costs, or student loan repayments, the amount they are willing to lend will decrease. They want to ensure that even if interest rates rose by 2% or 3%, you could still meet your monthly obligations. This is often referred to as a stress test.
Your credit score also plays a vital role. A higher score suggests you are a lower-risk borrower, which can grant you access to better interest rates. Lower interest rates mean lower monthly payments, which technically increases the amount you can afford to borrow while staying within your monthly budget. You can find more practical advice on managing your finances in our wealth knowledge base.
What are the upfront costs of buying a home?
The purchase price of the house is only one part of the financial equation. You must set aside liquid cash for several fees that cannot be added to your mortgage. Many first-time buyers make the mistake of putting every penny of their savings into the deposit, only to find they cannot afford the legal fees or taxes required to finish the transaction.
The table below outlines the typical costs associated with buying a property in the UK priced at £250,000.
| Expense Type | Estimated Cost | Notes |
|---|---|---|
| Deposit (10%) | £25,000 | Lenders prefer 10% but 5% is sometimes possible. |
| Stamp Duty (SDLT) | £0 - £2,500 | First-time buyers pay £0 up to £425,000. |
| Solicitor/Legal Fees | £1,000 - £2,000 | Includes conveyancing and local searches. |
| Surveyor Fees | £400 - £900 | Depends on the depth of the survey (Levels 1-3). |
| Mortgage Product Fee | £0 - £999 | Can sometimes be added to the mortgage loan. |
| Removal Costs | £300 - £1,200 | Depends on volume of goods and distance moved. |
It is sensible to keep a buffer of at least £2,000 for immediate repairs or unexpected bills after you move in. Buying a house often reveals small issues that were not apparent during viewings, such as a leaking tap or an old boiler that needs a service immediately.
How much of your monthly income should go toward a mortgage?
Financial experts often suggest the 35% rule, which states that your total housing costs—including mortgage, insurance, and utilities—should not exceed 35% of your gross monthly income. In the UK, many people spend closer to 40% or 50% in high-cost areas like London or the South East, but this can lead to "house poverty," where you have little money left for anything else.
To calculate a safe monthly payment, look at your net (take-home) pay. If you take home £2,400 a month, a £900 mortgage payment represents 37.5% of your after-tax income. You must then factor in:
- Council Tax (usually £120–£200 per month)
- Buildings and contents insurance (£20–£50 per month)
- Utilities: Gas, electricity, and water (£150–£250 per month)
- Service charges (if buying a leasehold flat, £100–£300 per month)
If these additional costs bring your total housing spend to £1,400, you are left with £1,000 for food, transport, clothes, and savings. For many, this is a tight margin. Striking a balance between the house you want and the life you want to lead is a core part of personal wealth management.
Is a bigger deposit always better?
Increasing your deposit reduces the Loan-to-Value (LTV) ratio. LTV is the percentage of the property value that is covered by the mortgage. For example, if you buy a £200,000 home with a £20,000 deposit, your LTV is 90%. If you have a £40,000 deposit, your LTV drops to 80%.
Lenders offer significantly better interest rates as you hit specific LTV thresholds. The most common tiers are 95%, 90%, 85%, 80%, 75%, and 60%. Moving from a 95% LTV to a 90% LTV can often save you hundreds of pounds a month because the interest rate drops. However, moving from 65% to 60% might only offer a negligible difference. If you are close to a threshold, it is often worth saving for a few more months to reach it. You can read more about setting financial goals in our section on personal development.
How do interest rates affect affordability?
Interest rates are the single most influential factor in your monthly affordability. When rates are low (around 2%), a £200,000 mortgage over 25 years might cost roughly £850 per month. If rates rise to 6%, that same loan jumps to approximately £1,290 per month. This difference of £440 must come from your disposable income.
When you ask "how much can I afford," you are really asking "how much can I afford if rates go up?" Most buyers choose a fixed-rate mortgage for the first 2, 3, or 5 years. This provides certainty, but you must plan for what happens when that fix ends. If you are already at the limit of your budget during a low-interest period, a future rate hike could make your home unaffordable.
Before committing to a purchase, use an online calculator to see what your payments would look like at 7% or 8% interest. If that number makes you feel anxious, you might want to look for a slightly cheaper property. For more answers to common financial queries, check our life skills Q&A.
Frequently asked questions
What is the minimum deposit I need for a house in the UK?
Most lenders require at least a 5% deposit. On a £250,000 house, this is £12,500. While 5% mortgages are available, they often come with higher interest rates and stricter credit requirements than 10% or 15% deposits.
Can I buy a house if I have existing debt?
Yes, but it will reduce the amount you can borrow. Lenders subtract your monthly debt repayments from your "disposable" income calculation, which lowers the maximum loan they offer. It is usually best to pay off high-interest credit cards before applying for a mortgage.
How does being self-employed affect how much I can afford?
Self-employed buyers are assessed on their net profit rather than gross turnover. Most lenders require at least two years of certified accounts or SA302 tax calculations. They usually average your profit over the last two years to determine your borrowing limit.
Do I need to include my student loan in affordability calculations?
Lenders do not treat student loans the same as commercial debt, but the monthly repayment is seen as a commitment that reduces your take-home pay. You do not need to pay it off, but you must declare the monthly deduction so the lender can accurately assess your budget.