How to Calculate Self-Employed Income for a Mortgage

If you work for yourself, a mortgage lender won’t take your word, or your bank deposits, for what you earn. They calculate a qualifying income from your tax returns, usually averaged over two years, with certain deductions added back. That number, not your sales, decides how much you can borrow. This guide walks through the calculation step by step, with a worked example.

This is general information. Lenders and loan programs differ, so ask your loan officer which worksheet and rules they apply.

Who counts as self-employed

Lenders treat you as self-employed if you own 25% or more of a business, or if you’re paid on a 1099 as a contractor or freelancer rather than a W-2 employee. That includes sole proprietors, single-member LLCs, partners and S-corporation owners. The paperwork differs by business type, but the idea is the same: start from taxable profit and adjust for non-cash items.

Step 1: start from net profit, not revenue

For a sole proprietor, the starting point is net profit on Schedule C (line 31) of each year’s Form 1040. Business expenses have already been subtracted. That is why aggressive write-offs, good for taxes, can hurt your mortgage application.

Partnerships and S-corporations use the owner’s share of income from the K-1, plus W-2 wages for S-corp owners, with adjustments from the business return.

Step 2: add back non-cash deductions

Some deductions lower taxable income without costing you cash that year. Lenders add these back:

Depreciation and depletion
Amortization and casualty losses
Business use of home (the home office deduction)
The depreciation portion of the standard mileage deduction
One-time, non-recurring losses, with documentation

Lenders may also subtract items, such as meals and entertainment that were excluded from deductions, or non-recurring income.

Step 3: average two years and divide by 12

qualifying monthly income = (year 1 adjusted income + year 2 adjusted income) ÷ 24

If the most recent year is lower than the prior year, many lenders use the recent year alone, or both years only if the decline has leveled off.

Worked example

A freelance designer has these Schedule C figures:

	Year 1	Year 2
Net profit	$62,000	$68,000
Depreciation add-back	$4,000	$5,000
Home office add-back	$1,200	$1,200
Adjusted income	$67,200	$74,200

Two-year total: 67,200 + 74,200 = $141,400.
Qualifying monthly income: 141,400 ÷ 24 = $5,891.67.
At a 43% debt-to-income limit, total monthly debts can reach 5,891.67 × 0.43 = $2,533.42. With $500 of other debts, the housing payment can be up to $2,033.42.
After $450 a month of property tax and insurance, about $1,583 is left for principal and interest. At 6.5% over 30 years, that supports a mortgage of about $250,514.

Enter the monthly figure in the loan affordability calculator to repeat this with your own numbers, then check the full payment on a specific home with the mortgage calculator.

S-corporations, partnerships and LLCs

If your business files its own return, lenders look at two layers of income:

Wages you pay yourself (W-2 from your S-corporation) count like employment income.
Your share of business profit from the K-1 counts only if the business has paid it out to you, or has enough cash to show it could. Lenders typically ask for the business returns as well, and may calculate the business’s cash flow before deciding how much of the K-1 income to use.

Business add-backs, such as depreciation on the business return, are applied in proportion to your ownership share.

Year-to-date income and trends

Lenders also look at how the current year is going. A year-to-date profit and loss statement that is well below last year’s pace can lower your qualifying income, even if your two-year average looks healthy. If business is seasonal, explain that in writing with your application. Strong, steady or rising income across the two years and the current year is the clearest path to approval.

Bank-statement and alternative-documentation loans

If your tax returns understate what you earn, for example because of large legitimate write-offs, some lenders offer bank-statement loans. Instead of tax returns, they average 12 or 24 months of business or personal deposits and apply an expense factor, often 50% for business accounts unless an accountant documents a different ratio. These loans are outside the standard conforming programs, so expect a higher rate, a larger down payment and stricter credit requirements. They can be a useful bridge, but compare the extra lifetime interest with simply waiting a year to show higher taxable income.

How to qualify for more as a self-employed borrower

Plan ahead for write-offs. In the two years before applying, consider whether maximizing deductions is worth a smaller loan approval.
Keep income stable or rising. A declining trend is the most common reason self-employed applications stall.
Separate business and personal finances. Clean records make add-backs easier to document.
Pay down personal debts. Each $100 a month of debt cleared adds roughly $15,800 of borrowing power at 6.5% over 30 years.
Consider a co-borrower with W-2 income, if appropriate.
Ask about alternative documentation loans. Bank-statement and asset-based loans exist, but usually at higher rates and with larger down payments.

Documents you’ll typically need

Two years of personal tax returns with all schedules
Two years of business returns for partnerships and corporations
A year-to-date profit and loss statement, sometimes signed by an accountant
Business license or proof of self-employment for at least two years
Recent personal and business bank statements

Common mistakes

Quoting gross sales as income. Lenders use net profit after expenses.
Forgetting that a one-year drop counts. Even if you’ve recovered since, the returns show the decline.
Mixing business and personal accounts. It makes add-backs and deposits harder to verify.
Applying too soon after going self-employed. Most programs want two years in the same field.
Not checking the amortization. Use the amortization calculator to see how a smaller loan changes your payments and interest over the full term.

Frequently asked questions

How many years of income do lenders use for self-employed borrowers?

Usually two years of personal (and, if applicable, business) tax returns, averaged. Some programs accept one year if you have a longer history in the same line of work, and bank-statement loans use deposits instead of tax returns, usually at a higher rate.

What can be added back to self-employed income?

Common add-backs are non-cash deductions such as depreciation, depletion, amortization, business use of home, and the depreciation part of the vehicle mileage deduction. Lenders follow worksheets such as Fannie Mae Form 1084 or Freddie Mac Form 91.

What if my income went down last year?

Lenders usually use the lower, more recent year, or may need an explanation that the decline has stopped. A significant ongoing drop can mean the income can't be used at all until it stabilizes.

Do lenders use my gross revenue?

No. They start from net profit after business expenses, the bottom line of Schedule C for sole proprietors, so writing off more expenses lowers your qualifying income.

Can I use this income in a mortgage affordability calculator?

Yes. Divide the 2-year average qualifying income by 12 and enter it as your gross monthly income. The loan affordability calculator then applies the debt-to-income limit for you.