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Mortgage Affordability Calculator 2026

Find out how much you can borrow based on your income, deposit and outgoings. Uses real income multiples from major UK lenders — Barclays, Halifax, Nationwide, HSBC, NatWest and Santander.

✓ Lender multiples verified · BoE base rate 3.75% · Updated March 2026

Calculate your mortgage affordability

Enter your income and outgoings to see how much lenders are likely to offer.

Your Income
£
£
Joint application?
Add a second applicant's income
£
Monthly Outgoings
£
£
£
£
Deposit & Rate
£
Maximum Property Price
£0
Based on standard 4.5× multiple
Mortgage + deposit
Conservative
£0
4× income
Standard
£0
4.5× income
Enhanced
£0
5.5× (if eligible)
Monthly repayment estimate (standard borrowing)
Mortgage amount£0
Interest rate used4.40%
Mortgage term30 years
Monthly repayment£0
Annual repayment£0
Repayment as % of gross income0%
Loan-to-Value (LTV) 0%
60%75%85%90%95%
What major lenders might offer you
Lender Multiple Est. Max Loan Conditions

📊 Current Mortgage Rates

BoE Base Rate3.75%
Best 2yr Fixed (60% LTV)3.45%
Avg 2yr Fixed (75% LTV)4.25%
Best 5yr Fixed (60% LTV)3.75%
Avg 5yr Fixed (75% LTV)4.40%
Avg SVR7.15%
UpdatedMarch 2026

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📋 Key Facts

  • Most lenders cap at 4.5× income; up to 6× for higher earners
  • The BoE limits 4.5×+ loans to 15% of each lender's book
  • Existing debts reduce how much lenders will offer
  • Credit cards counted at 3–5% of balance as monthly cost
  • Self-employed typically need 2 years of accounts
  • Results are indicative — a broker will get precise figures

Mortgage Affordability Guide 2026

How much lenders will offer depends on far more than your salary. Here's what actually drives affordability decisions at UK banks right now.

How income multiples work

Lenders multiply your annual income by a set figure to arrive at the maximum loan. The Bank of England restricts lenders from offering more than 15% of new mortgages at 4.5× income or above — so most lending happens at 4–4.5×.

For joint applications, lenders combine both salaries before applying the multiplier. Here is an example of how a combined income is calculated:

Applicant 1
£40k
+
Applicant 2
£35k
=
Combined
£75k
× 4.5
=
Max Borrowing
£337,500

Major lender income multiples (March 2026)

Lender Standard Enhanced Threshold
Barclays 4.49× 6.0× ≥£75k income, ≤85% LTV
Halifax 4.49× 5.5× Higher earners, full assessment
Nationwide 4.5× 6.0× FTBs ≥£40k; movers ≥£75k
HSBC 4.49× 6.5× Premier (≥£100k), ≤75% LTV
NatWest 4.5× 6.0× ≥£75k income, ≤75% LTV
Santander 4.45× 5.5× Full affordability assessment

How debts reduce your borrowing

Lenders deduct monthly debt commitments from your disposable income before calculating how much they'll lend:

• Car finance / loans: Monthly repayment deducted in full
• Credit cards: 3–5% of the outstanding balance counted monthly — even if you pay in full
• Student loans: Repayment deducted (9% of income above £25k for Plan 2)
• Childcare: Full monthly cost factored in
• Target DTI: Most lenders prefer total debt below 40% of income

Stress testing explained

Even if you can afford repayments today, lenders must check you could still afford them if interest rates rise. Since August 2022, lenders set their own stress rates (the Bank of England removed the mandatory 3% buffer).

Most lenders now stress test at roughly 6–8% — meaning they check you could afford repayments at that rate, not just the product rate you're applying for.

For fixed-rate mortgages longer than 5 years, no stress test is required — which is one reason 5yr+ fixes can offer higher borrowing.