Variable income mortgages

If your income moves around, you can still be a candidate for a mortgage. The question is whether the file shows a stable average, not whether last month was a good month. This pillar is the map. The supporting guides answer the specific document and program questions.

How underwriters usually look at uneven pay

When income is overtime, bonus, commission, or 1099, underwriters typically average a documented history (often 12–24 months) rather than using the highest recent month. That average is then run through DTI: Front-end DTI is housing payment (PITI plus HOA if applicable) divided by gross monthly income. Back-end DTI is all counted monthly debts divided by gross monthly income.

Snapshot as of 2026-08. Investor guides and lender overlays change. A loan officer has to apply the guide that is in force for your product, not a blog paragraph.

Common files

• Gig plus W-2. How the average is built — two streams, then add. A peak gig month is not the method.
• CPA letter vs tax returns. What actually moves underwriting — a letter supports; it does not replace returns and transcripts.
• Commission or seasonal work. Two years is a common ask when the work is cyclical. See commission averaging and a down year.
• W-2 overtime or bonus. History on the W-2s usually matters more than a verbal promise. Likely to continue.
• Self-employed history. Two years of returns vs one year.
• K-1 (partner / S-corp). What usually counts on a K-1 — distributions are not a qualifying method.
• Schedule E rentals. Rental income on a purchase file is history on properties you already own, not proposed rent. Depreciation add-back: what agency files allow.
• 1099 / contract. See the 1099 documentation checklist. If you just went 1099 last month, that income is usually not yet an average. A spouse or partner’s W-2 only helps when they are a borrower — spouse W-2 offset.
• Co-mingled business and personal deposits. Business vs personal co-mingling stalls sourcing — pair with the 60-day large-deposit trail.
• Self-employed with heavy write-offs. Taxable income can look small while deposits look strong. That is the Non-QM hub (bank-statement, DSCR, asset-depletion), not a conventional shortcut you can assume. Start with bank-statement loans.

What this hub does not do

It does not tell you that you will qualify. It does not pick a rate. It does not replace tax advice about how you report income. If gift funds are part of the down payment, read gift-fund rules before you move money.