Mortgage Underwriting
Underwriting is the lender's process of verifying your income, assets, debts, and the property's value to decide whether to approve your mortgage and on what terms. It's where a preapproval becomes a real loan, and where your DTI and credit are scrutinized in detail.
Most files first pass through automated underwriting, which returns an approval subject to conditions; a human underwriter then verifies that the documents match. Conditional approval is the normal state, not a warning — the conditions are usually paperwork rather than doubts. What derails files is change. Opening a car loan or store card alters your debt-to-income ratio, changing jobs breaks the employment verification lenders repeat shortly before closing, and large unexplained deposits must be sourced, because underwriters have to rule out borrowed down payments. A gift needs a signed letter and a traceable trail. The practical rule is to keep your finances boring from application to keys.
Put it to work
Home Affordability Calculator
How much house can you afford? Get a realistic max price from your income, debts, and down payment using the 28/36 rules lenders actually apply.
Debt-to-Income Ratio Calculator
Calculate the debt-to-income (DTI) ratio mortgage lenders use to size your approval — front-end and back-end — and see how much room you have before 36%.
Mortgage Calculator
Estimate your monthly mortgage payment with taxes, insurance, PMI and HOA — plus total interest and a full amortization breakdown. Free, fast, no signup.