How do mortgage lenders calculate K-1 income from a partnership or S-corp?
The full answer
The 25% ownership line matters. Below it, K-1 earnings are usually documented like other income. At or above it, you're self-employed in the lender's eyes, and underwriting shifts to the business: personal returns plus two years of the partnership (Form 1065) or S-corp (Form 1120-S) returns.
What counts is the income the K-1 reports — ordinary business income, guaranteed payments to partners, and for S-corp owners the W-2 wages you pay yourself — after the same add-back and averaging math applied to Schedule C filers. Cash distributions aren't income by themselves; a large distribution from a company reporting thin ordinary income doesn't raise your qualifying figure.
If the business earned money you left inside it, agency guidelines let lenders count your share only when the returns demonstrate the business has the liquidity to distribute it — underwriters run ratio tests on the business balance sheet to check. A CPA letter confirming ownership percentage and business health is routinely requested, so brief your accountant early.
Related questions
If this came up, these usually do too — the short answer to each, with a link to the full breakdown:
- How do lenders calculate self-employed income?On a conventional loan, lenders start with your net profit from two years of tax returns, add back non-cash expenses (depreciation,…
- Do mortgage lenders use gross or net income for self-employed borrowers?Net income. On a conventional loan, lenders qualify self-employed borrowers on the net profit from your tax returns — gross revenue minus…
- Should I write off less — or amend my tax returns — to qualify for a mortgage?Writing off less on future returns genuinely raises your qualifying income — at the cost of more tax. Amending past returns mid-application…
- Do tax write-offs hurt your mortgage approval?Yes, on conventional loans. Every business deduction lowers the net income lenders use to qualify you, so aggressive write-offs that cut…
- Can I use 1099 income to qualify for a mortgage?Yes. 1099 contractors qualify by reporting that income on Schedule C and being treated as self-employed, usually with a two-year average.…
Sources
Educational information only — not financial advice, and not a quote, pre-approval, or offer of credit. Program rules and ranges are illustrative and vary by lender. Mortgage Merlin is a publisher, not a lender or broker.