How pre-approval actually works (start to letter)
From application to automated underwriting (DU/LP) and your pre-approval letter—here are the exact steps lenders take, what “conditions” mean, and how to speed it up.
The 7 steps to pre-approval
- Apply online or with a loan officer. Provide income, employment, assets, debts, and consent.
- Credit pull (tri-merge). Scores, history, utilization, and existing tradelines are reviewed.
- Upload documents. Pay stubs, W-2/1099s, bank statements, ID, and any gift letters.
- Automated underwriting (AUS). Findings from DU or LP determine initial eligibility and conditions.
- Loan officer review. Clarifies anomalies (large deposits, job changes, new debts).
- Issue pre-approval letter. States max loan and assumptions; usually property-subject and time-limited.
- Maintain status. Avoid new credit, keep funds “sourced,” and provide refresh docs as needed.
Credit pull: what the lender actually sees
Tri-merge report
- Three bureau scores; many programs use the middle score.
- Open accounts, limits, balances, and utilization.
- Payment history, derogs (lates, collections), and inquiries.
Rate-shopping window
Multiple mortgage pulls in a short window are often treated as one inquiry. Batch applications to minimize impact.
Docs review & paper trails
Lenders verify income and assets and may request explanations for anything unusual.
Common requests
- W-2/1099, recent pay stubs, YTD income
- Bank statements (2–3 months), retirement statements
- Gift letter + evidence of transfer
Source of funds
- Explain large deposits & transfers
- Keep funds in one account when possible
- Avoid cash deposits and new debt
Automated underwriting (DU/LP)
Most lenders run your file through Desktop Underwriter (DU) or Loan Product Advisor (LP). The system returns Findings that list requirements and flags. Examples:
Approve/Eligible— meets program; provide listed documents.Refer— needs manual review or stronger compensating factors.Ineligible— outside guidelines; consider program/terms changes.
AUS approval is still conditional on property (appraisal, title) and final verification.
“Conditions” and what they mean
Typical conditions
- Updated pay stubs / bank statements
- Letter of explanation (deposit, job change)
- Verification of employment (VOE)
Property conditions (later)
Once under contract: appraisal, title/insurance, condo/HOA docs if applicable.
Your pre-approval letter
The letter shows a maximum loan amount and key assumptions (income, down payment, program). Many lenders can customize the letter to a specific offer price.
Refreshing & timeline
- Typical validity: ~60–90 days. Refresh with the latest stubs/statements.
- Under contract: appraisal ordered, disclosures signed, rate locked, title cleared.
- If anything changes: tell your loan officer immediately.
Speed-up tips
- Upload complete PDFs (no photos), all pages, and recent dates.
- Keep funds in one account and avoid new credit.
- Apply with 2–3 lenders inside a single rate-shopping window and compare the Loan Estimate comparison sheet.
Disclaimer: Educational only, not financial advice. Programs vary by lender and state. Confirm details with your lender.