Married Texans who run a business learn early that community property makes the profit half yours and half your spouse's. That is true for income tax. It is not true for self-employment tax, and the gap between those two rules is where a lot of Schedule SE mistakes come from.

The mistake usually shows up one of two ways. A couple filing separately splits the business income in half for self-employment tax, so the spouse who actually works the business underreports. Or the couple assumes the non-working spouse is building Social Security credit when the law gives that spouse none. The first creates IRS notices. The second creates a retirement surprise decades later.

The statute: SE income follows the person carrying on the business

IRC 1402(a)(5)(A) is the controlling rule. When income from a trade or business, other than one carried on by a partnership, is community income under state community property law, the gross income and deductions of that business are treated as those of the spouse carrying on the trade or business. If the business is jointly operated, each spouse is treated as having their respective distributive share.

So if a wife owns and runs a Plano landscaping company as a sole proprietor and her husband works elsewhere, all of the net earnings from self-employment are hers, even though half of the profit is his for community property income tax purposes. Her Schedule SE carries the whole thing.

IRC 1402(a)(5)(B) applies a parallel rule to partnerships. When a partner's distributive share is community income, all of it goes into that partner's net earnings from self-employment, and none of it goes into the spouse's.

Joint returns hide the issue. Separate returns expose it.

On a joint return, income tax is computed on combined income, so the community split rarely matters for income tax. Self-employment tax is still computed per person on separate Schedules SE, and the rule above decides whose Schedule SE carries the income. Software usually gets this right when the business is entered under the correct spouse.

Married filing separately is where it goes wrong. Each Texas spouse generally reports half of community income on their own return, and that includes half the Schedule C profit for income tax. Form 8958 is how you show that allocation. But the self-employment tax does not split. The spouse carrying on the business reports all of the net earnings from self-employment on their Schedule SE. My guide to Form 8958 and married filing separately walks through the allocation itself.

IRS Publication 555, Community Property, makes this point in its discussion of self-employment tax. If the preparer splits the SE income in half, the IRS's matching programs or an examiner will eventually notice that half the business's earnings never had self-employment tax computed on the right person.

What "carrying on the business" means in practice

The statute looks at who actually operates the trade or business, not whose name is on the bank account or who holds the assumed name certificate. Management, labor, customer relationships, licenses, and decision making all point to the operator.

If both spouses genuinely run it together, the business may be jointly operated, and each spouse's share of net earnings is based on their distributive share. But a jointly operated business owned by two spouses raises a separate question: is it actually a partnership for federal tax purposes? That opens up Form 1065 filing obligations, or the elections that let couples avoid them. Texas spouses who own an LLC together can look at Rev. Proc. 2002-69, and spouses running an unincorporated business may consider the qualified joint venture election under IRC 761(f).

Do not label a business "joint" just to spread self-employment tax. If one spouse does the work, the other spouse's name on the paperwork changes nothing under 1402(a)(5).

The Social Security side

Self-employment tax is not only a cost. It funds Social Security and Medicare credit for the person who pays it. When all of the SE income lands on the operating spouse, only that spouse builds an earnings record from the business.

That is the law working as designed, but it matters for planning. A spouse who helps in the business without being an employee or a genuine co-operator may end up with little or no earnings record of their own. Some couples fix that properly, by paying the spouse a real wage for real work and running it through payroll, or by structuring a genuine joint operation. What does not work is splitting the Schedule SE after the fact.

When the IRS catches it

Errors here tend to surface three ways. An examination of the Schedule C asks who runs the business and finds the SE split is wrong. A married-filing-separately return gets flagged because the Form 8958 allocation and the Schedules SE do not line up. Or the operating spouse has unpaid self-employment tax that grows with penalties and interest for years before anyone looks.

The fix is usually mechanical: amended returns that move the self-employment tax onto the correct spouse, using Form 1040-X. The harder part is the money. Self-employment tax is 15.3 percent on net earnings up to the Social Security wage base, plus the Medicare portion above it, so moving years of income onto one spouse's Schedule SE can produce a real balance due.

If that balance is more than you can pay at once, the usual collection tools apply: an installment agreement, penalty relief where the facts support reasonable cause, and in the right case an offer. Self-employed Texans with older balances should also read my guide on 1099 tax debt.

A short checklist for Texas couples with a business

  • Identify which spouse carries on the business, based on who does the work and makes the decisions.
  • Report all net earnings from self-employment on that spouse's Schedule SE, even if filing separately.
  • If filing separately, allocate community income for income tax on Form 8958, and keep the SE tax on the operating spouse.
  • If both spouses genuinely run the business, decide whether it is a partnership, a qualified joint venture, or an LLC eligible for Rev. Proc. 2002-69 treatment.
  • Keep records that show who did the work: licenses, contracts, correspondence, and time spent.

The community split is a property rule. Self-employment tax is a work rule. Keep them in separate drawers and you will stay out of the IRS's. If they are already mixed up, let's talk: 813-229-7100.

Frequently asked questions

In Texas, do both spouses pay self-employment tax on a business one spouse runs?

No. Under IRC 1402(a)(5)(A), net earnings from a community property sole proprietorship are treated as the earnings of the spouse carrying on the business. That spouse reports all of it on Schedule SE, even though the profit is split between spouses for community property income tax purposes.

If we file separately, do we split self-employment tax in half?

No. Each spouse generally reports half of community income for income tax on a separate return, with Form 8958 showing the allocation. Self-employment tax stays entirely with the spouse who carries on the business. Splitting it is one of the most common community property errors.

What if my spouse and I really run the business together?

Then each spouse's net earnings are based on their distributive share. But a business jointly owned and operated by spouses may be a partnership for federal tax purposes, which raises Form 1065 obligations. Spouses with a Texas LLC can look at Rev. Proc. 2002-69, and unincorporated businesses may qualify for the qualified joint venture election.

How do I fix years where self-employment tax was split incorrectly?

Usually by amending the returns on Form 1040-X so the operating spouse reports all net earnings from self-employment. That often creates a balance due. If you cannot pay it all at once, payment plans and penalty relief are available, and the analysis should start with your IRS account transcripts.

General information, not legal advice. Darrin T. Mish practices federal tax law. Where other areas of Texas law are discussed, confirm the point with a lawyer who practices in that area before relying on it.