Banks typically lend 4-4.5 times your household income, but the actual amount depends on your deposit, expenses, credit score, and the lender’s stress test. Here’s how UK mortgage affordability really works.
Table of Contents
Quick Affordability Overview
The standard income multiple used by most UK lenders:
| Household Income | 4x Multiple | 4.5x Multiple | 5x Multiple (select lenders) |
|---|---|---|---|
| £25,000 | £100,000 | £112,500 | £125,000 |
| £30,000 | £120,000 | £135,000 | £150,000 |
| £35,000 | £140,000 | £157,500 | £175,000 |
| £40,000 | £160,000 | £180,000 | £200,000 |
| £50,000 | £200,000 | £225,000 | £250,000 |
| £60,000 | £240,000 | £270,000 | £300,000 |
| £75,000 | £300,000 | £337,500 | £375,000 |
| £100,000 | £400,000 | £450,000 | £500,000 |
Most high-street lenders cap at 4.5x. Some specialist and private banks offer 5x+ for high earners with large deposits.
What You Can Afford by Income and Deposit
For a 25-year repayment mortgage at current rates:
With a 10% Deposit
| Your Income | Max Mortgage (4.5x) | Max Property Price | Monthly Payment (5%) | Monthly Payment (4%) |
|---|---|---|---|---|
| £25,000 | £112,500 | £125,000 | £658 | £593 |
| £30,000 | £135,000 | £150,000 | £790 | £711 |
| £40,000 | £180,000 | £200,000 | £1,053 | £949 |
| £50,000 | £225,000 | £250,000 | £1,316 | £1,186 |
| £60,000 | £270,000 | £300,000 | £1,580 | £1,423 |
| £75,000 | £337,500 | £375,000 | £1,975 | £1,779 |
| £100,000 | £450,000 | £500,000 | £2,633 | £2,372 |
With a 20% Deposit
| Your Income | Max Mortgage (4.5x) | Max Property Price | Monthly Payment (5%) | Monthly Payment (4%) |
|---|---|---|---|---|
| £25,000 | £112,500 | £140,625 | £658 | £593 |
| £30,000 | £135,000 | £168,750 | £790 | £711 |
| £40,000 | £180,000 | £225,000 | £1,053 | £949 |
| £50,000 | £225,000 | £281,250 | £1,316 | £1,186 |
| £60,000 | £270,000 | £337,500 | £1,580 | £1,423 |
| £75,000 | £337,500 | £421,875 | £1,975 | £1,779 |
| £100,000 | £450,000 | £562,500 | £2,633 | £2,372 |
A larger deposit doesn’t increase your mortgage amount, but it lets you access better rates and increases the maximum property price you can consider.
How Lenders Calculate Affordability
Lenders use two main tests:
1. Income Multiple
| Lender Type | Typical Multiple | Notes |
|---|---|---|
| High-street banks | 4-4.5x | Standard for most applicants |
| Building societies | 4-4.75x | May be more flexible |
| Specialist lenders | Up to 5.5x | For professionals (doctors, lawyers, accountants) |
| Private banks | Up to 6x+ | Very high earners, large assets |
2. Stress Test (Affordability Assessment)
Since 2014, lenders must check you can afford payments if rates rise. The typical stress test:
| Current Rate | Stress Test Rate | Monthly Payment at Stress Rate (£200K mortgage) |
|---|---|---|
| 4.0% | 6.5-7.0% | £1,380-£1,431 |
| 4.5% | 7.0-7.5% | £1,431-£1,483 |
| 5.0% | 7.5-8.0% | £1,483-£1,536 |
| 5.5% | 8.0% | £1,536 |
Your monthly housing costs (mortgage + council tax + services charges) should generally not exceed 35-45% of your gross income.
Income Types Accepted
| Income Type | How Lenders Treat It |
|---|---|
| Basic salary (PAYE) | 100% counted |
| Regular overtime | 50-100% (needs 6+ months history) |
| Annual bonus | 50-100% (average of last 2-3 years) |
| Commission | 50-75% (average of last 2-3 years) |
| Self-employed income | Average of last 2-3 years’ profits |
| Rental income | 50-75% |
| Benefits (child benefit, etc.) | Some lenders count, some don’t |
| Student loan income | Not counted (and repayment reduces affordability) |
| Second job income | Usually counted if held for 12+ months |
Expenditure That Reduces Borrowing
Lenders review your committed spending:
| Monthly Expense | Impact on Borrowing |
|---|---|
| Childcare (£500/month) | Reduces max mortgage by ~£25,000-30,000 |
| Car finance (£300/month) | Reduces max mortgage by ~£15,000-18,000 |
| Student loan (Plan 2, £30K salary) | Reduces max mortgage by ~£5,000-10,000 |
| Credit card minimum payments (£100/month) | Reduces max mortgage by ~£5,000-6,000 |
| Personal loan (£200/month) | Reduces max mortgage by ~£10,000-12,000 |
| Gym membership (£50/month) | Minimal impact (some lenders ignore) |
Pro tip: Pay off credit cards and personal loans before applying. Even a £3,000 credit card balance can reduce your borrowing by £15,000+.
Deposit Requirements
| LTV (Loan-to-Value) | Deposit | Typical Rate Premium | Example (£250K home) |
|---|---|---|---|
| 95% | 5% | +0.8-1.2% higher | £12,500 deposit |
| 90% | 10% | +0.3-0.5% higher | £25,000 deposit |
| 85% | 15% | +0.1-0.2% higher | £37,500 deposit |
| 80% | 20% | Competitive rates | £50,000 deposit |
| 75% | 25% | Best standard rates | £62,500 deposit |
| 60% | 40% | Very best rates | £100,000 deposit |
Total Cost of a Smaller Deposit
For a £250,000 property over 25 years:
| Deposit | Mortgage | Rate | Monthly Payment | Total Interest Paid |
|---|---|---|---|---|
| 5% (£12,500) | £237,500 | 5.5% | £1,456 | £199,300 |
| 10% (£25,000) | £225,000 | 5.0% | £1,316 | £169,800 |
| 15% (£37,500) | £212,500 | 4.7% | £1,200 | £147,400 |
| 20% (£50,000) | £200,000 | 4.5% | £1,112 | £133,600 |
Moving from a 5% to a 20% deposit saves £65,700 in interest over 25 years and reduces your monthly payment by £344.
Joint vs Solo Applications
| Scenario | Solo Income £35K | Joint Income £35K + £30K |
|---|---|---|
| Income multiple (4.5x) | £157,500 | £292,500 |
| Max property (10% deposit) | £175,000 | £325,000 |
| Monthly payment (5%, 25yr) | £921 | £1,711 |
Joint applications nearly double your borrowing power.
Mortgage Rates Overview (2026)
| Mortgage Type | Typical Rate | Best Available |
|---|---|---|
| 2-year fixed (90% LTV) | 4.8-5.2% | ~4.5% |
| 5-year fixed (90% LTV) | 4.5-4.9% | ~4.2% |
| 2-year fixed (75% LTV) | 4.3-4.7% | ~4.0% |
| 5-year fixed (75% LTV) | 4.0-4.4% | ~3.8% |
| Tracker (Base Rate + margin) | Base + 0.5-1.0% | Variable |
| Standard Variable Rate (SVR) | 6.5-7.5% | Avoid |
Fixed vs tracker: Fixed rates give certainty. Trackers can be cheaper but carry risk if the Bank of England raises rates.
Mortgage by Property Price
What income you need for various property prices across the UK:
| Property Price | Deposit (10%) | Mortgage | Income Needed (4.5x) | Monthly Payment (5%) |
|---|---|---|---|---|
| £150,000 | £15,000 | £135,000 | £30,000 | £790 |
| £200,000 | £20,000 | £180,000 | £40,000 | £1,053 |
| £250,000 | £25,000 | £225,000 | £50,000 | £1,316 |
| £300,000 | £30,000 | £270,000 | £60,000 | £1,580 |
| £350,000 | £35,000 | £315,000 | £70,000 | £1,843 |
| £400,000 | £40,000 | £360,000 | £80,000 | £2,107 |
| £500,000 | £50,000 | £450,000 | £100,000 | £2,633 |
How to Improve Your Affordability
| Action | Potential Impact |
|---|---|
| Pay off debts (credit cards, loans) | +£15,000-30,000 borrowing |
| Cancel unused subscriptions | +£2,000-5,000 borrowing |
| Reduce discretionary spending (3 months before) | Improves bank statement review |
| Save a larger deposit | Better rates, lower LTV |
| Apply jointly with a partner | Nearly doubles borrowing |
| Use a mortgage broker | Access to better deals and higher multiples |
| Register on electoral roll | Improves credit score |
| Fix credit report errors | Could unlock better rates |
Additional Costs to Budget For
| Cost | Typical Amount |
|---|---|
| Stamp Duty (SDLT) | £0-15,000+ |
| Solicitor/conveyancer fees | £1,000-2,000 |
| Survey (Level 2/3) | £400-1,500 |
| Valuation fee | £0-500 (often free with lender) |
| Mortgage broker fee | £0-500 (many are fee-free) |
| Moving costs | £500-2,000 |
| Furniture/furnishings | £2,000-10,000 |
| Total (beyond deposit) | £4,000-30,000+ |
Key Takeaways
- Most lenders offer 4-4.5x income — a £50K household income gets a ~£225K mortgage
- Deposits of 10-20% give the best balance of accessibility and competitive rates
- The stress test means you need to afford payments at 2-3% above your actual rate
- Outstanding debts significantly reduce borrowing — pay off credit cards before applying
- Joint applications nearly double your maximum mortgage
- Budget £4,000-30,000 beyond your deposit for stamp duty, legal fees, surveys, and moving
- A mortgage broker can access deals not available directly and may secure a higher multiple
