Mortgage Affordability Calculator
A rough affordability check before the real application.
Mortgage brokers use a quick affordability check — income against existing debt — so a borrower knows roughly what they can afford before starting the real application and credit check. It's a filter, not a pre-approval.
This is a barebone starting point — real pricing rules go beyond one formula. Need this for your own business? Make your own →
Questions
What is debt-to-income (DTI), and why does it matter?
DTI is the share of gross income already going to debt payments. Lenders cap it, often around 36%, to judge how much more a borrower can safely take on — that's the "debt-to-income limit" input here.
Is this a pre-approval?
No — it's a rough filter to see if it's worth starting the real application. Actual approval depends on credit history, verified income, and the lender's own underwriting.
Does this account for taxes and insurance in the monthly payment?
Not in this barebone version — it only checks affordability against income and existing debts. Add extra steps for taxes, insurance, and HOA fees for a fuller picture.
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