1099 and Corp-to-Corp IT Consultants: Qualifying When You Are Technically a Business

Look at the top of your contract. If it says "corp-to-corp" or "C2C," your mortgage file just got three times longer than your colleague's, and the two of you make exactly the same money doing exactly the same work at exactly the same client site.

That is not a complaint about fairness. It is a description of how residential underwriting classifies people. The classification has nothing to do with skill, tenure or income level. It has to do with who signs your check and what tax form reports it.

Three Shapes, Three Files

	W-2 through a vendor	1099 independent contractor	Corp-to-corp
What you are, to an underwriter	An employee	Self-employed	A business owner
Who pays you	The staffing company	The client or vendor, directly	Your LLC or S corp, which invoices the vendor
Primary income document	W-2 and recent paystubs	Schedule C on your 1040	Form 1120S plus K-1, or Form 1065 plus K-1
History normally required	30 days of paystubs, two years of W-2s	Two years	Two years
Business returns in the file	No	Sometimes	Yes
Form 4506-C	One, personal	Personal, possibly business	Personal and one per business return type
Relative difficulty	Easiest	Middle	Hardest

The right-hand column is not a life sentence. It is a document list. Most C2C consultants who get declined were declined because they walked into the process with a W-2 borrower's paperwork and a W-2 borrower's timeline.

What Each Shape Actually Requires

W-2 through a staffing vendor. You are an employee of the vendor. Paystubs, W-2s, a verification of employment. The fact that you sit at a client's office and your project could end is a continuance question, not a documentation question.

1099. Fannie Mae B3-3.2-01 generally requires a two-year history of prior earnings. Your Schedule C is the source document, and B3-3.3-03 governs what gets adjusted: depreciation, depletion, business use of a home, amortization and casualty losses are added back; meals and entertainment are subtracted; non-recurring income is removed. For a consultant, the home office deduction and the Section 179 write-off on your laptop and your car are usually the meaningful add-backs. The full add-back list is here.

Corp-to-corp. Your LLC taxed as an S corp files an 1120S and issues you a K-1. The lender needs the business return, the K-1, and — this is the part that surprises people — confirmation of the actual cash distributions you received. Fannie Mae B3-3.2-02 sets out the structures: sole proprietor to Schedule C, partnership to Form 1065 plus a K-1, S corp to Form 1120S plus a K-1, C corp to Form 1120 plus a 1099-DIV. For partnerships and S corps, the lender must confirm actual cash distributions received, not just K-1 income.

The S Corp Salary Problem

Here is the single most expensive mistake in this category.

Your CPA told you to take a "reasonable salary" on W-2 and pull the rest as distributions, because distributions avoid self-employment tax. Good advice for your tax bill. Terrible if the person filling out your loan application only enters the W-2.

Take Arvind, a composite of files we see in Irving. He runs a one-man consulting S corp billing a healthcare client through a vendor.

• W-2 salary from his own company: $70,000

• K-1 ordinary business income: $120,000

• Distributions actually received and traceable to his personal account: $110,000

If his file shows only the W-2, his qualifying income is $70,000 ÷ 12 = $5,833 per month. At a 45% debt-to-income ratio with $900 of other obligations, that leaves roughly $1,725 for the housing payment.

Documented properly — the 1120S, the K-1, and bank statements showing the distributions landing — his income is built on $70,000 plus the supportable distribution figure of $110,000, or $180,000, which is $15,000 per month. Same man. Same client. Same bank balance. A house nearly three times the size.

The lever is documentation, not creativity. If the money did not actually move to your personal account, you cannot use it.

The Underwriter's Real Anxiety: What Happens When the Project Ends

Nobody in underwriting is worried that you cannot do the work. They are worried about the six weeks between the Cigna contract ending and the Fidelity contract starting, and whether that gap repeats.

The way to answer that is with evidence, assembled before anyone asks:

• A contract history: every SOW or master agreement for the last two to three years, in date order. Overlapping and back-to-back contracts tell the story better than any letter of explanation.

• A client list showing you are not a single point of failure — three vendors over three years reads more stably than one.

• Consistent deposits. Twenty-four months of business bank statements where the monthly inflow does not go to zero is the most persuasive document you own.

• Your current contract with its end date and any renewal language.

A two-year average is the mechanism that absorbs gaps. If 2024 had a three-month bench period and produced $148,000, and 2025 was fully utilized at $196,000, the average is $172,000, or $14,333 a month. The gap is already priced in. What an underwriter cannot absorb is a gap that is still open on the day you apply with no signed contract to follow it.

Do not do this: do not let your engagement lapse and then apply during the bench period because "the average is fine." Continuance matters. Close the loan while you are on a live contract.

Two Specific Situations

You just switched from W-2 to C2C. Extremely common — the vendor offers a higher rate to move you off their payroll, and six months later you want to buy. You are now self-employed with less than two years of history. There is a one-year exception under B3-3.2-01, available with the most recent signed personal and business returns showing a full 12 months of self-employment income, plus documented prior income at the same or greater level in a field providing "the same products or services" or "an occupation in which they had similar responsibilities." A Java architect who went from W-2 to C2C doing Java architecture is precisely the fact pattern that language was written for. More on qualifying before two years.

Your company is not just you. If you have placed consultants, run payroll and built a staffing book, you are running a staffing business, and the five-year business rule may let you use a single year of returns after a Form 1084 cash flow analysis — provided ownership has been consistently 25% or more and the business is at least five years old. The five-year rule is here.

The 4506-C Detail Nobody Warns You About

Form 4506-C authorizes the lender to pull your tax transcripts from the IRS. Under B3-3.1-06, multiple forms may be required: one for your personal transcripts, and a separate one for each business return type in the file. If you have an S corp and a partnership interest, that is three forms, not one.

It gets waived where DU validates your income, which does happen. Do not plan around it. Sign what you are sent, sign it the day you get it, and make sure the entity name and EIN on the form match the return exactly — a mismatched EIN is the single most common cause of a rejected transcript request and a week lost.

If you hold an interest in a partnership alongside your consulting entity — a restaurant, a strip center, a group investment — the partnership mechanics are covered here.

Frequently Asked Questions

Q: Is corp-to-corp income treated as self-employment for a mortgage?
A: Yes. If you invoice through your own LLC or S corporation, you are a business owner for underwriting purposes. Expect to provide two years of personal and business tax returns, the K-1, and evidence of actual cash distributions received. A W-2 from your own company alone does not tell the underwriter what the business earned or paid you.

Q: Can I qualify with only one year of 1099 income?
A: Possibly. Fannie Mae B3-3.2-01 allows a one-year history with the most recent signed personal and business returns showing a full 12 months of self-employment income, plus documented prior income at the same or greater level in the same field or an occupation with similar responsibilities. Moving from a W-2 role into the same work as a contractor is the classic qualifying case.

Q: Do gaps between consulting projects disqualify me?
A: No, if they are historical and absorbed by a two-year average. Supply your contract history, a client list and consistent business bank statements. What creates real trouble is applying during an open gap with no signed follow-on engagement, because continuance of income is what the underwriter is measuring.

Q: My CPA keeps my salary low. Does that hurt my mortgage?
A: Only if your file stops at the W-2. Document the 1120S, the K-1 and the distributions you actually received, and the distribution income counts. Ask your CPA for the distribution detail from the corporate books before you apply, and confirm any change to your compensation structure with him first.

Q: How many 4506-C forms will I have to sign?
A: As many as there are return types. One for your personal 1040 and one for each business return — an 1120S, a 1065, an 1120. B3-3.1-06 contemplates multiple forms. The requirement can be waived where DU validation validates the income, but assume you will sign them.

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