OfferPrep · How Lending Works · Part 2 · Updated October 2026

How Preapproval Really Works

What a lender checks, what the letter does and doesn't promise, and how to keep it valid until closing.

By OfferPrep Editorial · Last reviewed October 24, 2026 · 2 min read

The How Lending Works series

Prequalified vs. preapproved, in one line each

Names vary between lenders, so the CFPB suggests asking what the letter is based on rather than relying on the label.

What the lender checks

  1. Credit: scores, payment history, and current debts.
  2. Income: pay stubs, W-2s or tax returns, and how stable the income is.
  3. Assets: bank and retirement statements, to confirm down payment, closing costs, and any reserves.
  4. DTI: monthly debts plus the estimated new housing payment, divided by gross monthly income.

Documents to gather now

What the letter promises (and doesn't)

A preapproval letter tells a seller a lender has reviewed your finances. It is not final approval. Final approval still depends on the specific home, the appraisal, title, and the conditions the underwriter sets. Letters also typically expire, often after a few months.

Keep your preapproval healthy until closing

About credit checks

Shopping more than one lender within a short window is generally treated as one inquiry for scoring. See the CFPB source below.

Get the Prequalified vs. Preapproved Guide

A printable one-pager to keep next to your documents. Then continue with part 3: loan types, side by side.

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Next in the series: Loan types, side by side.

Sources

Figures on this page were checked against the official sources below on October 24, 2026. Programs and limits change; confirm current figures with the source or a licensed lender before you rely on them.