U.S. citizens entering marriages with nonresident aliens face a range of tax complexities that extend well beyond routine compliance. In my earlier Forbes article, “A Complicated U.S. Tax Life: Foreign Spouses and Community Property”, I examined how foreign community property regimes, which are prevalent in civil law jurisdictions (e.g., many countries in continental Europe, as well as in Central and South America), can attribute ownership of assets to the U.S. spouse, triggering FBAR and FATCA reporting duties.
While the tax impact of these community property issues is significant, they are not the only challenges facing the mixed-nationality couple. This article focuses on one additional area carrying profound U.S. tax consequences when community property rules are involved: the potential invalidation of S corporation elections. Business owners must address this risk before it causes disruption in the business and its operational structure. With more than 40 years of experience, I know that strategies are available to maintain tax efficiency, but the bigger problem is often a lack of awareness. If individuals are blithely unaware of the risks, it may become too late to effect a strategy.
A Community Property Surprise
Couples are often surprised to learn about the so-called “immutability principle” prevalent in civil law jurisdictions. Under this principle, the community property regime from the couple’s first common habitual residence after marriage may continue to govern asset ownership indefinitely, even after relocation to a separate property jurisdiction, unless the couple formally elects a change (usually through a notarial act or court filing). The purpose behind this principle is to ensure stability in the matrimonial relationship by preventing changes that could negatively impact one of the spouses or a third party, such as a creditor. The precise rules of the particular jurisdiction must be carefully examined with local counsel to make sure nothing is overlooked.
Community Property Can Destroy An S Corporation
A significant possible problem for mixed-nationality couples involves community property and closely held businesses.
S corporations have gained popularity ever since the passage of Internal Revenue Code Section 199A created by the Tax Cuts and Jobs Act. This provision allows certain taxpayers, including owners of pass-through entities such as S corporations, to deduct up to 20% of their qualified business income, or QBI. For many taxpayers, this QBI deduction can significantly reduce the effective tax rate on business income. The One Big Beautiful Bill Act, which became law on July 4, 2025, made this QBI deduction a permanent feature of the Internal Revenue Code and further enhanced Section 199A by expanding income phase-out ranges, making the deduction more accessible to many small business owners.
These changes have given greater long-term certainty for S corporations (and other pass-through entities), and have ensured continued popularity for this business structure. Aside from the QBI deduction, the S corporation structure provides an additional benefit. By paying the shareholder a “reasonable” salary and taking the rest as a distribution that is not subject to payroll tax (e.g., FICA), payroll taxes are minimized. These features have made the S corporation very appealing.
S Corp Qualification Is Precise
Qualification as an S corporation mandates specific requirements, including limitations on who can be a shareholder. Nonresident alien individuals are prohibited from owning shares in an S corporation. If they do, the S election is no longer valid, resulting in loss of pass-through treatment and potentially devastating tax consequences. Unfortunately, this can be overlooked if tax planners are not contemplating the impact of foreign community property rules along with the immutability principle.
The termination of an S corporation election is not discretionary. The election is automatically invalidated by operation of law the moment an ineligible shareholder exists. There will be no IRS notice. From that point forward, the corporation is treated as a C corporation without pass-through treatment, meaning taxation occurs not only at the corporate entity level, but again at the shareholder level when receiving dividends. It is precisely this automatic termination feature that makes community property issues so dangerous. Taxpayers often have no idea the S election has been lost until years later, usually in the context of an audit or specific transaction (such as a sale of the business).
The discovery of a defective S election, while devastating, may still possibly be cured. Depending on the precise facts, the IRS may grant relief for an inadvertent termination. Relief is not automatic and it is highly fact-intensive. A private letter ruling from the IRS may be needed which is expensive and would require specialized legal help.
Unfortunately, an inadvertent termination of the S election due to a nonresident alien shareholder is not eligible for an IRS simplified relief procedure under Revenue Procedure 2022-19, 2022-41 IRB 282. Preventing the termination is certainly the better course. Once multiple years are affected by termination of the S election, unwinding the damage becomes far more complicated and costly.
A Failed Prenup Wreaked Havoc
In Ward v. U.S., 661 F.2d 226 (Ct. Cl. 1981), a U.S. citizen who owned S corporation stock married a nonresident alien subject to the community property regime of Mexico. Despite an oral prenuptial agreement declaring the stock as separate property, the court found that the agreement was unenforceable under Mexican law since it was not in writing and conflicted with the later formal public marriage record. As a result, the nonresident alien spouse was deemed to own half the stock, thereby destroying the S corporation election from the outset. The invalidity applied from the time the corporation was formed, requiring recharacterization of all income as corporate dividends rather than pass-through items.
As evidenced by Ward, without careful planning, S corporation status can inadvertently be destroyed overnight. Couples with a nonresident alien spouse must embed U.S.-compliant separate-property clauses into the marriage record or use postnuptial agreements if permitted by the relevant country’s marital property regime. Without question, these must be carefully vetted by both local and U.S. counsel.
Proper Cross-Border Planning Is Essential
In cross-border marriages involving community property, planning requires great precision. It will almost always involve coordination between experienced U.S. international tax advisors and local law experts. Unfortunately, many taxpayers fail to pay early attention to these issues that can easily preserve S corporation integrity and prevent shocking tax results.
Posted April 2026
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First published on Forbes Februrary 22, 2026
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