Mortgage Affordability Calculator

Find out how much you could borrow based on your income and outgoings

Lenders use two main tests to decide how much you can borrow:

  • Income multiple: Typically 4.5x your annual income (some lenders go higher).
  • Affordability stress test: They check if you could still afford payments if rates standard.

This calculator combines both approaches, showing the lower of the two results — which is usually the stress test for higher earners or longer terms.

💡 Tip: Different lenders use different income multiples and stress rates. Use this as a guide, then check with a mortgage broker for actual offers.

Income

Monthly Expenditure

Loan Details

⚠️ Important limitations
This calculator provides an estimate only. Lenders use their own affordability models, credit checks, and criteria. Results assume a clean credit history and do not account for age, retirement plans, or lender-specific policies.

Note on existing housing costs: Current rent or mortgage payments are not included as outgoings because these will be replaced by your new mortgage payment. Some lenders may ask for them to assess your payment history, but they do not reduce your borrowing capacity.

Always seek professional financial advice before making borrowing decisions.