How big a mortgage can I get?

The short answer

Start around 4.5× household income

That gives an initial mortgage figure. Add the deposit to estimate a home budget, then check whether the deposit is large enough for the mortgage required.

Worked example

£300,000 home budget

The illustration produces a £270,000 mortgage at 90.0% LTV.

What sets the limit?

Income or deposit—whichever is tighter

• Income limitIncome and ongoing commitments shape the starting mortgage.
• Deposit limitThe calculator does not illustrate borrowing above 95% LTV.
• Monthly costRate and term determine whether the repayment feels workable.