Understanding Mortgage Affordability
Knowing how much house you can afford before you start looking saves time and prevents the disappointment of falling in love with a home outside your budget. This calculator works backwards from your income and debts — rather than starting with a home price and working out the payment, it tells you the maximum price you can realistically afford.
The calculation uses the industry-standard 28/36 rule. Your front-end ratio (housing costs as a percentage of income) should stay at or below 28%. Your back-end ratio (all debt payments including housing as a percentage of income) should stay at or below 36–43%. The calculator enforces both constraints and uses whichever is more limiting.
The scenario comparison table shows three price points — conservative (25% of income), standard (28%), and aggressive (33%). Many buyers can technically qualify for the aggressive scenario, but it leaves less room for other financial goals like saving for retirement, handling unexpected repairs, or managing lifestyle changes. Most financial planners recommend targeting the conservative or standard scenario.
Remember that this calculator shows the maximum you can afford — not necessarily the amount you should spend. A smaller mortgage means less financial stress, more flexibility, and faster wealth building. Once you know your maximum, use our Mortgage Calculator to model the exact monthly payment for any specific home price.