Mortgage Affordability Calculator
Find out how much you could borrow and what your estimated monthly mortgage payments might be.
Your Details
Leave at 0 if buying alone
Existing debt repayments, commitments
Lenders typically offer 4–4.5x income
Affordability Estimate
Based on 4.5% interest over 25 years with a 19.8% deposit.
Disclaimer: These results are estimates for informational purposes only and do not constitute financial advice. Always consult a qualified financial adviser before making financial decisions.
How Mortgage Affordability Works
Income multiples
Lenders calculate how much you can borrow by multiplying your annual income by a set figure — typically between 4 and 4.5. Some specialist lenders offer up to 5.5x for high earners or professionals in certain fields.
Affordability assessments
As well as income multiples, lenders carry out a full affordability assessment, looking at your outgoings, credit history, and stress-testing your ability to repay if interest rates rise.
The importance of LTV
Your Loan to Value ratio has a major impact on the interest rates available to you. Borrowers with 10% or less deposit typically pay significantly higher rates than those with 25% or more.
Monthly payment calculation
Your monthly repayment is calculated using a standard amortisation formula. The payment covers both capital repayment and interest, so the total outstanding falls with each payment you make.
Frequently Asked Questions
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