Family / Household Mortgage Affordability
Income (annual gross unless noted)
Household & Liabilities
Mortgage Product
Estimated max property price
£387,500
Borrow up to £337,500 + your £50,000 deposit at 87 % LTV. Monthly repayment at 4.5% over 30 years: £1,710.
How each rule scores it
Lower of the two — your indicative ceiling
£337,500
Income & debt summary
Counted annual income (after lender weights)
£75,000
Counted monthly income
£6,250
Per-dependent allowance
− £0
Max monthly mortgage payment supported
£2,188
Indicative only. Actual lender decisions depend on credit score, employment status, income proof history (typically 2 years for self-employed / dividends), property type and product fees. Speak to a broker for exact figures.
What is the Family / Household Mortgage Affordability?
Mortgage affordability for a UK household is the maximum loan a lender will offer based on counted income (salary, weighted bonus, dividends, rental), existing debts and dependents. Most lenders apply a 4.5× income multiple alongside an affordability stress test of the contract rate + 1%, then take the lower figure.
Last reviewed: against HMRC rates for 2024/25 & 2025/26.
Typical UK lender affordability inputs
Worked example
A couple earning £45k + £30k = £75k counted income can borrow ~£337,500 on the 4.5× multiple. With a £50k deposit that supports a property up to ~£387,500 — assuming the affordability stress test at the contract rate + 1% doesn't bring it down further.
Frequently asked questions
+How much can I borrow on a £75,000 household income?
Most lenders cap residential lending at 4.5× of qualifying income — about £337,500. Some stretch to 5–5.5× for higher earners, certain professions, or with longer terms. Affordability stress tests can reduce this further if you have significant debts or dependents.
+Does rental income count for a residential mortgage?
Yes — typically 75% of gross rent is added to your counted income, the haircut allowing for voids and running costs. Some lenders use 100% if you can show 2 years of consistent rental history.
+Will dependents reduce my mortgage?
Yes. Lenders deduct around £250 per child per month from disposable income before calculating the maximum payment. A second or third child noticeably reduces affordability — even on the same income.
+How is bonus or commission income treated?
Most lenders count 50% of bonus/commission, averaged over 2–3 years of payslips/P60s. A handful count 100%; others count 0% if the bonus is irregular. It pays to bank with a lender that recognises your earning pattern.
+What's the difference between the income multiple and affordability rules?
Income multiple is a hard cap (e.g. 4.5×). Affordability is a stress test — it back-solves the loan from how much monthly payment your post-debt, post-dependent income can sustain at the contract rate + 1%. Lenders apply the lower of the two.