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Mortgage Affordability Calculator

Last updated: April 2026

Income

£
£

Bonus, rental income, commission or other regular income.

£
£

Outgoings

Car finance, loans, credit card minimum payments and other regular debt commitments.

£
£
£

The rate used to test affordability. Typically around 3% above the product rate.

%

Maximum Borrowing

Maximum borrowing£180,000.00
Maximum property£230,000.00

Based on the lower of a standard 4x income multiple and the affordability repayment estimate.

Income Multiple Table

MultipleMax BorrowMax PropertyLender Type
3.5x£157,500.00£207,500.00Conservative
4.0x£180,000.00£230,000.00Standard
4.5x£202,500.00£252,500.00Most lenders
5.0x£225,000.00£275,000.00Some lenders
5.5x£247,500.00£297,500.00Specialist

Affordability Breakdown

Monthly net income (est.)£2,812.50
Monthly commitments-£500.00
Childcare-£0.00
Dependants allowance-£0.00
Monthly disposable£2,312.50
Max repayment (45%)£1,040.63
Implied max borrowing£187,220.08

Stress Test

At current rate (4.5%)£1,000.50/mo
Stressed rate (7.5%)£1,330.18/mo
Stress testFail

Your application may fail the lender's stress test. Consider a smaller mortgage or reducing other commitments.

Deposit and LTV

Deposit£50,000.00
Borrowing£180,000.00
Property£230,000.00
LTV78.26%

Estimate only

This is an estimate only, not a Decision in Principle. Actual lending decisions depend on credit score, employment type, deposit source, property type, and individual lender criteria. Get a Decision in Principle from a lender or mortgage broker for an accurate figure.

How much can I borrow for a mortgage?

Most UK mortgage lenders will lend between 4 and 4.5 times your gross annual income. For joint applications, this is typically applied to the combined income. Some specialist lenders offer up to 5.5 times income for high earners or professionals. The actual amount depends on credit score, existing debts, deposit size, and lender criteria.

What is a mortgage stress test?

A mortgage stress test checks whether you could still afford the repayments if interest rates rose. Lenders use this kind of test to reduce the risk of borrowers overextending themselves. If your finances are tight, affordability may limit borrowing below the income multiple result.

What is a Decision in Principle?

A Decision in Principle, also called an Agreement in Principle, is a conditional statement from a lender showing what they may be willing to lend, subject to a full application and valuation. Estate agents often ask for one before accepting an offer.

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