Underwriting Simulator · May 2026
Self-Employed Mortgage
Qualification Simulator
By Ziya Y. · 23 Years Banking & Mortgage · Updated May 2026
The #1 shock for self-employed borrowers: lenders use your net taxable income — not what hit your bank account. If you earned $150K gross but wrote off $80K in expenses, lenders see $70K. This simulator shows your real qualifying income and approval odds.
⚠️ The Write-Off Penalty: Every dollar you write off to reduce taxes also reduces your mortgage qualifying income. The same tax strategy that saves you money at tax time can cost you tens of thousands in home buying power.
How Self-Employed Mortgage Qualifying Works
Why do lenders use net income, not gross?
Lenders assess repayment ability based on actual disposable income. If your business spent $80K to generate $150K revenue, your economic income is $70K — that's what can service a mortgage. Tax returns (Schedule C) capture this accurately, which is why 2 years of returns are required.
What can be added back to increase qualifying income?
Several non-cash expenses can be added back: depreciation (biggest add-back for most), depletion, and certain business use of home deductions. These don't affect cash flow but reduce taxable income — lenders add them back to get a truer picture of income.
What if my income is declining year over year?
Most lenders use the lower year when income is declining. If Year 1 was $100K and Year 2 was $80K, qualifying income is $80K (not the average of $90K). Some lenders will decline entirely with declining income. If your income is growing, lenders average the two years.
What is a bank statement loan and when does it make sense?
A bank statement loan uses 12-24 months of business or personal deposits to calculate income instead of tax returns. The lender applies an expense factor (typically 50-85% of deposits count as income). This helps borrowers who write off heavily but have strong cash flow. Rates are typically 0.5-2% higher than conventional.
Not financial advice. Educational content based on 23 years of mortgage experience. Qualifying income calculations vary by lender and loan program. Consult a licensed MLO for your specific situation.