Mortgage preapproval vs final approval
What each stage checks, validity, property underwriting, and why approval can still fail.
Preapproval is a preliminary screening on stated information and is not a promise to lend; final approval is full underwriting of you and the property, and it can still fail if documents, appraisal, insurance, employment, debt, or property eligibility change.
Key points
- Preapproval (事前審査) screens stated income, debts, identity, employment, and property — not a promise.
- Final approval (本審査) is full underwriting after detailed documents and property checks.
- Approval can fail after preapproval if documents differ, the appraisal is weak, or insurance is unavailable.
- Get preapproval before making an offer, and avoid job changes or new debt until closing.
Two stages, two purposes
Preapproval (事前審査/仮審査) is an initial screening using your stated income, debts, identity, employment, and property information. It gives you a realistic budget and lets you act quickly, but it is not a promise to lend. Final approval (本審査) is full underwriting after you submit detailed documents and the lender checks the property — the sale contract, important-matters explanation, tax and income documents, identity and residence records, property documents, and insurance/health declarations all come into play here.
Why final approval can still fail
Approval can fail or change after preapproval if the documents differ from what you stated, the appraisal comes in weak, group credit life insurance is unavailable because of health, your employment changes, new debt appears, or the property turns out to be ineligible (for example, leasehold terms, floor area, legality, or rebuildability). To protect yourself, get preapproval before making an offer, draft the financing-condition clause carefully, and avoid material changes — job moves, new loans, large purchases — between preapproval and closing.
Key points to carry away: Preapproval (事前審査) screens stated income, debts, identity, employment, and property — not a promise; Final approval (本審査) is full underwriting after detailed documents and property checks; Approval can fail after preapproval if documents differ, the appraisal is weak, or insurance is unavailable; Get preapproval before making an offer, and avoid job changes or new debt until closing. Use the linked guides and calculators for the full decision, and confirm anything material with the lender, a licensed broker, a judicial scrivener, or a tax accountant before you act.
Who this is for
- Buyers about to make an offer
- Anyone timing a job change
What this is not
- A guaranteed approval
- Do not change jobs or take on new debt between preapproval and closing unless disclosed and accepted.
Frequently asked questions
What is preapproval?
Preliminary screening on stated information — not a final promise to lend.
What is final approval?
Full borrower and property underwriting after detailed documents and checks.
Can final approval fail after preapproval?
Yes — if documents differ, the appraisal is weak, insurance is unavailable, employment changes, new debt appears, or the property is ineligible.
Should I change jobs after preapproval?
Avoid material changes until closing unless disclosed and accepted; a change can undo an approval.