A physician sponsors a generous cash balance plan for her practice. Her husband owns a separate consulting firm with eight employees of his own.
Many couples assume these two businesses have nothing to do with each other. The tax code often disagrees, and the reason is spousal attribution.
This guide explains the retirement plan attribution rules for spouses in plain detail. It covers the default rule, the narrow exception, and what happens when attribution applies.
How Retirement Plan Attribution Rules for Spouses Work
Retirement plans treat related businesses as a single employer when enough common ownership exists. Section 414(b) applies this to corporations, and Section 414(c) applies it to partnerships and sole proprietorships. Both rules borrow their ownership tests from Section 1563 of the tax code. Those tests count stock a person owns directly and stock they are deemed to own.
Deemed ownership is called attribution. Under the default spousal rule, each spouse is treated as owning everything the other spouse owns. If a wife owns 100% of a corporation, her husband is treated as owning 100% too. Spouses who are legally separated under a decree of divorce or separate maintenance are not considered married.
This default makes sense from a policy standpoint. Without it, an owner could shift employees into a spouse’s company and leave them out of the plan. Congress wanted to stop that kind of maneuver. Attribution closes the gap by looking at the household rather than the name on the stock certificate.
The Four-Part Test to Avoid Spousal Attribution
Section 1563(e)(5) provides an exception to the default rule. A spouse is not attributed the other spouse’s ownership if four conditions are all met. Each condition must hold at all times during the taxable year. Failing even one condition for a single day restores full attribution.
First, the spouse cannot directly own any stock in the other spouse’s company. Second, the spouse cannot be a director, an employee, or a participant in management. Third, no more than 50% of the company’s gross income can come from passive sources. Passive sources include royalties, rents, dividends, interest, and annuities.
Fourth, the stock cannot carry restrictions that limit the owning spouse’s right to sell it. This applies when the restrictions run in favor of the other spouse or their children under age 21. A buy-sell agreement naming the other spouse as purchaser could trip this condition. Partnerships and other unincorporated businesses apply parallel tests under Treasury Regulation 1.414(c)-4.
If you meet all the exceptions, then the companies are not attributed to each other. Here is a table of all the exceptions.
| Requirement | What It Means | Common Way It Fails |
|---|---|---|
| No direct ownership | The spouse owns no stock or interest in the other spouse’s business | Spouse holds a token share for estate or succession planning |
| No director, employee, or management role | The spouse does not serve on the board, work in the business, or help run it | Spouse is named an officer or approves major business decisions |
| Passive income limit | No more than 50% of gross income comes from rents, royalties, dividends, interest, or annuities | The business is mainly a real estate or investment holding company |
| No disposition restrictions | The stock is free of transfer limits favoring the other spouse or children under 21 | A buy-sell agreement names the other spouse as the buyer |
How Spousal Attribution Brings a Spouse’s Employees Into Your Plan
This is where attribution creates real financial consequences. In the typical case, each spouse owns one company outright. Attribution then makes each spouse a deemed 100% owner of both companies, creating a controlled group. Every employee of the spouse’s company is then counted as if they worked for the plan sponsor.
Coverage testing under Section 410(b) compares the employees who benefit with those who do not. The spouse’s employees go into that comparison as non-highly compensated employees in most cases. If they are excluded from the plan, the ratio often drops below the required threshold. The usual fix is to extend the plan, or a comparable plan, to the spouse’s workforce.
For a defined benefit or cash balance plan, this can be expensive. Owners in their fifties often receive six-figure annual contributions under these designs. Adding a dozen staff members from a spouse’s firm changes the cost picture entirely. Nondiscrimination testing under Section 401(a)(4) must also include those employees.
Defined benefit plans face one more hurdle under Section 401(a)(26). The plan generally must benefit the lesser of 50 employees or 40% of all employees. A spouse’s larger staff can raise that minimum and complicate a small plan design.
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Other limits are also aggregated across the combined group. These include the Section 415 annual limits and the top-heavy determination. Missing these issues is a qualification failure that usually requires correction under the IRS EPCRS program.
SECURE 2.0 Changes to Spousal and Family Attribution
SECURE 2.0 Section 315 made two helpful changes, effective for plan years beginning after December 31, 2023. The first change involves community property states such as Arizona, California, and Texas. Before the change, community property law could give each spouse a legal ownership interest in the other’s business. That direct ownership automatically failed the first condition of the four-part test.
Now community property laws are disregarded when determining ownership for controlled groups and affiliated service groups. A couple in Phoenix is analyzed the same way as a couple in Chicago. Separate businesses can now qualify for the four-part exception regardless of state law. This change matters for married professionals in all nine community property states.
The second change involves minor children under age 21. Previously, a minor child was deemed to own each parent’s stock, which could link two unrelated businesses. SECURE 2.0 now blocks that result when the spousal exception is otherwise satisfied. Parents with young children no longer face a controlled group created only through their kids.
Common Mistakes That Trigger Spousal Attribution
The four-part test looks simple, but real-world facts often break it. Many couples fail the exception without realizing it until a plan audit or testing review. The following situations come up repeatedly in practice. Each one deserves attention before a new retirement plan is adopted.
- A spouse holds a token share of the other’s company for estate or succession planning.
- A spouse serves as an officer or board member to satisfy state corporate formalities.
- A spouse approves payroll, signs vendor contracts, or makes hiring decisions for the other business.
- The business earns most of its income from rents, such as a real estate holding company.
- A shareholder agreement gives the other spouse a right of first refusal on the stock.
- The couple assumes HCE and key employee status follow the same exception, which they do not.
- The couple overlooks affiliated service group rules, which use different attribution and can aggregate businesses anyway.
Why the Spousal Exception Does Not Apply to HCE and Key Employee Status
The four-part exception only applies to controlled group determinations under Section 1563. Highly compensated employee and key employee status use Section 318 attribution instead. Section 318 attributes ownership between spouses with no exception at all. A spouse of a 5% owner is therefore always treated as a 5% owner.
This means a spouse working in the business is an HCE regardless of pay. That spouse is also a key employee for top-heavy purposes. Affiliated service groups under Section 414(m) also rely on Section 318 rather than Section 1563. Passing the four-part test therefore does not end the analysis for professional service firms.
Is a Cash Balance or Defined Benefit Plan Right For You?
Consider a dentist whose spouse owns a separate dental lab. The couple may pass the controlled group test under the four-part exception. However, the service relationship and Section 318 attribution could still create an affiliated service group. Both analyses must be completed before a plan design is finalized.
Bottom Line
Spousal attribution is the default rule, not the exception. Married business owners should assume their companies are linked until the four-part test proves otherwise. When attribution applies, the spouse’s employees join the coverage and nondiscrimination testing for your plan. That outcome can reshape the cost and design of any retirement plan.
The retirement plan attribution rules for spouses reward careful planning and punish assumptions. Review ownership, roles, income sources, and agreements before adopting a plan. Revisit the analysis whenever either spouse takes on a new role or acquires an interest. A qualified actuary or third-party administrator can confirm the controlled group status before contributions begin.
