Why 'do nothing' is the strategy
A mortgage approval is a snapshot of your finances at one moment — your income, your debts, your credit, your assets. The lender approves that snapshot, but it does not stop watching. Right before closing, the file is re-verified: credit is often re-pulled, employment re-confirmed, and bank statements re-reviewed.
That means a decision that looked fine at application — buying a car, opening a card, switching jobs — can undo your approval at the worst possible time. The good news is the rule is simple: from approval to closing, keep your financial life boring. Change nothing you do not have to.
Credit: don't open it, don't run it up, don't co-sign
New debt is the most common way buyers trip themselves at the finish. Financing a car or a room of furniture adds a monthly payment that raises your debt-to-income ratio, and the hard inquiry can shave points off your score — and underwriting checks both again before you sign. Running up existing cards does the same thing more quietly, by raising your balances and obligations.
Co-signing for someone else counts too: even if they make every payment, that obligation lands on your ratios. The safe window for any of this is after your loan funds, not before.
Employment: keep it steady
Lenders confirm your employment again close to the closing date, because the loan was approved on the income you reported. Changing employers, quitting, dropping to part-time, or moving from salary to commission can all force underwriting to pause and re-evaluate — and a gap can stop it cold. If a job change is genuinely unavoidable, do not spring it on your lender at the last minute; tell your loan officer as early as possible so it can be handled inside the process rather than as a surprise.
Cash and deposits: keep a paper trail
Lenders do not just confirm you have the funds to close — they confirm where those funds came from. A large deposit that is not a normal paycheck has to be sourced and documented, and money that cannot be explained generally cannot be used. Cash deposits are the classic offender, because there is no record of origin.
The same goes for moving money around. Shuffling funds between accounts without keeping the statements breaks the trail underwriting needs. If you are receiving gift funds, there is a right way to document them — a gift letter and a transfer record. When in doubt about any deposit or transfer, ask your loan officer first.
If something is unavoidable, call your loan officer first
Life does not always pause for a closing. If you truly have to change jobs, make a large purchase, or move money, the move is not to hide it — it is to call your loan officer before you act. Many situations can be documented and worked around if the lender knows in advance; the same situation discovered at the last minute is what causes delays. A quick conversation up front is almost always the difference between a speed bump and a derailment.
