Most mortgage denials trace back to something that could have been fixed months earlier, not moments before closing. The steps below are ordered roughly by how far in advance you need to start them — the earlier ones take longer to move but matter more.
90–120 days out: credit
Pay down revolving balances, not just the minimum
Credit utilization — the share of your available revolving credit you're using — is one of the fastest-moving inputs to your score. Getting balances under 30% of the limit, and ideally under 10%, can lift a score meaningfully within one or two statement cycles, because the change reports as soon as the card issuer updates the balance.
Don't close old accounts
Closing a card you don't use feels tidy but shortens your average account age and reduces total available credit, both of which can lower your score right when you need it highest.
Dispute real errors, but don't chase every negative item
Genuine inaccuracies — an account that isn't yours, a payment marked late that wasn't — are worth disputing with all three bureaus. Disputing accurate negative history rarely helps and can slow underwriting if the dispute is still open when you apply, since some lenders require disputes to be resolved before closing.
60–90 days out: debt-to-income
Pay down or pay off installment debt where you can — an auto loan with six payments left is worth eliminating before applying, since it removes that payment from your DTI entirely rather than just shrinking it. If a family member can pay off a card as a gift, document it properly; gift funds used to eliminate debt still need a paper trail.
Avoid new debt entirely once you're within a few months of applying. A new car loan or "0% for 12 months" furniture purchase can push DTI over a lender's line even if your income comfortably supports the mortgage payment alone.
30–60 days out: cash and documentation
Let down payment and closing-cost funds sit in your account for at least two full statement cycles before applying — this is "seasoning," and it's what lets an underwriter accept a bank statement without a letter of explanation for every deposit. Avoid large, irregular deposits during this window; if you must move money (selling a car, a bonus, a gift), do it early and keep the paper trail — sale receipt, gift letter, deposit slip.
Gather two years of W-2s or tax returns, two months of bank statements, and recent pay stubs before you start shopping lenders. Having documentation ready doesn't change your odds directly, but it prevents your file from stalling in a queue while you track down a 2023 W-2.
At application: employment and stability
If you're weighing a job change, doing it after closing rather than before removes a variable underwriting has to explain. A change is usually fine if it's in the same field with equal or higher pay, but it still adds a verification step and, at some lenders, a hard stop until an offer letter and first pay stub are in file.
The step people skip: check the lender, not just your own file
Two borrowers with identical files get different answers at different lenders, because lenders differ in overlays and in which loan types they underwrite well. Before applying, it's worth checking a lender's actual denial-rate history and most common denial reasons — if a lender denies heavily for debt-to-income and yours is borderline, that's a signal to either fix the DTI first or apply somewhere with a track record of approving files like yours. The best approval odds ranking on this site is built from exactly that data.