How Much Can I Borrow for a Mortgage?
An independent guide to mortgage affordability — how lenders decide what you can borrow, what affects the figure, and where to go for a reliable estimate.
As a starting point, most UK lenders offer between 4 and 4.5 times gross annual income. Enter your income to see that range.
⚠️ This is a rough guide only. Actual offers depend on your full financial circumstances, credit history, deposit size, and each lender's individual affordability assessment. Some specialist lenders may offer more for higher earners or certain professions.
Free, impartial, and backed by HM Government. More detailed than the rough guide above — or speak to a qualified mortgage broker for a personalised figure.
Understanding what you can borrow is the starting point for any property purchase — but the mortgage offer is just one piece of the puzzle. This guide explains how lenders assess affordability, what affects the figure, and what other costs to plan for alongside your monthly repayment.
How Lenders Decide How Much You Can Borrow
UK mortgage affordability is regulated by the Financial Conduct Authority. Lenders apply two tests:
- Income multiple — a cap on total borrowing as a multiple of gross income. Most high-street lenders apply 4 to 4.5 times income. Some specialist lenders offer up to 5 or 5.5 times for higher earners or regulated professions.
- Affordability assessment — a detailed look at your monthly income against all your committed outgoings (existing debt, childcare, student loans, regular bills). Lenders also stress-test the mortgage at a higher interest rate to check you could still afford repayments if rates rose.
- Credit file — your credit history affects both eligibility and the interest rate you're offered. Missed payments, CCJs, or recent defaults can significantly reduce what lenders will offer.
- Loan to Value (LTV) — the size of your deposit relative to the property price. A larger deposit typically unlocks better interest rates. 10% deposit is the common minimum; 15–25% opens up better rates.
Income multiples are a useful starting point but lenders vary. Two people with identical incomes can be offered different amounts depending on debt, childcare, spending patterns, credit score, and the lender's own criteria. For a figure you can rely on, use a mortgage broker or speak directly to lenders for a Decision in Principle.
What Can Increase or Reduce Your Borrowing
Higher, stable income
Salaried PAYE income with a track record tends to be viewed most favourably. Self-employed income is assessed over 2–3 years.
Existing debt
Credit card balances, car finance, and personal loans all reduce affordability. Clearing debt before applying often increases what you can borrow.
Larger deposit
A larger deposit reduces the loan-to-value ratio, unlocking lower rates and sometimes higher income multiples.
Dependants & childcare
Lenders factor in the cost of dependent children, childcare fees, and other household commitments against your income.
Clean credit file
A strong credit history can unlock a wider range of products. Check your file before applying — free services include ClearScore and Experian.
Longer term
Extending the term from 25 to 30 or 35 years reduces the monthly payment and can increase affordability — though it means paying more interest overall.
Costs to Budget for Beyond the Mortgage
Your mortgage payment is only part of the total cost of buying. Typical additional costs to plan for:
| Cost | What it covers |
|---|---|
| Stamp Duty (SDLT) | Tax on property purchases above the current threshold. Calculated by HMRC — use the official HMRC SDLT calculator for the exact figure. |
| Conveyancing | Solicitor or licensed conveyancer fees for the legal work of transferring ownership. Includes their fee plus disbursements (searches, Land Registry fees). |
| Survey | Independent RICS Home Survey (Level 2 or 3). Not legally required but strongly recommended — particularly for older or non-standard properties. |
| Mortgage fees | Lenders often charge a product or arrangement fee, which can usually be added to the mortgage (increasing interest paid). |
| Valuation fee | Some lenders charge for their own valuation; others include it free with the mortgage product. |
| Buildings insurance | Required by most lenders from exchange of contracts. Costs vary by property, location, and sum insured. |
| Moving costs | Removal firms, storage, utility reconnection, and change-of-address admin. |
For accurate figures on each of these, speak to your solicitor and mortgage adviser. As a rough guide, total additional purchase costs (excluding deposit and stamp duty) typically run into several thousand pounds.
Where to Get a Reliable Figure
The rough guide at the top of this page is a starting point — not a figure to plan a purchase around. For something you can actually rely on:
- MoneyHelper — free, impartial calculator from the Money and Pensions Service (the government's guidance body). More detailed than typical rule-of-thumb tools.
- A mortgage broker — independent (whole-of-market) or FCA-regulated. Can access lenders and specialist products not available direct. Fees vary — some brokers are paid by the lender only.
- A Decision in Principle (DIP) — a preliminary lender assessment based on your actual details. Free, non-binding, and typically valid for 60–90 days. Most estate agents expect buyers to have one before making offers.
- Your bank or building society — most offer affordability assessments to existing customers. Useful for comparison but you're not limited to one lender.
CJ Bloor is a RICS-regulated surveying practice, not an FCA-authorised mortgage adviser. This page provides general information only and is not financial advice. For personal recommendations on mortgages, always consult a qualified, FCA-regulated adviser.
Our Other Free Guides
Use these alongside your mortgage research to build a complete picture before you buy:
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Once you know your budget, protect your purchase with a RICS Home Survey. CJ Bloor covers the North West, West Yorkshire and West Midlands.
Explore our other free guides: View all property guides →
CJ Bloor Property Consultants Limited is regulated by RICS. This page is for general information only and is not financial advice. CJ Bloor is not authorised by the Financial Conduct Authority to give mortgage advice. For personal recommendations on mortgages, always consult a qualified, FCA-regulated adviser. For independent guidance, use MoneyHelper (the Money and Pensions Service).
