GILTI High-Tax Exclusion: Planning for US Owners

The GILTI high-tax exclusion can switch off current US tax on foreign company profits. We explain how the election works, when it helps, and the traps.

For a US person who owns a profitable company abroad, the GILTI regime is one of the most consequential rules in the tax code. Introduced by the 2017 reforms, it can sweep most of a foreign company's annual earnings onto your US return whether or not a single dollar is distributed.

The GILTI high-tax exclusion is the relief valve. Where foreign earnings have already been taxed above a defined threshold, you can elect to leave them out of the GILTI calculation entirely. Used well, it removes a layer of US tax and simplifies reporting. Used carelessly, it backfires.

This guide explains how the exclusion works in practice, who it suits, and the recurring mistakes we see when owners try to apply it without a coordinated plan.

What GILTI actually taxes

GILTI stands for global intangible low-taxed income. Despite the name, it is not limited to intangibles. For a US shareholder of a controlled foreign corporation, GILTI broadly captures the company's net active income above a routine return on its tangible assets. In most owner-managed service or trading businesses there are few tangible assets, so almost all profit is exposed.

The result is that a US founder running, say, a consultancy or software business through a foreign company can face current US tax on profits that remain inside the company. For individuals taxed directly, the position is often harsher than for US corporate shareholders, who may access partial deductions and foreign tax credits that individuals do not automatically receive.

This is the problem the high-tax exclusion is designed to address.

How the high-tax exclusion works

The core idea is simple. If the foreign company's income has already borne foreign tax at an effective rate above a set threshold, that income is treated as high-taxed and removed from the GILTI calculation. The threshold is pegged to a percentage of the US corporate rate, and as at 2026 the commonly cited figure is an effective foreign rate above roughly 18.9 percent.

The exclusion is an election. It is made by the controlling US shareholders, it generally applies on a consistent basis across the relevant foreign companies, and it must be applied for all qualifying high-taxed income, not cherry-picked item by item. The test is applied at a granular level, looking at income within each foreign company on a tested-unit basis, so a single entity operating in more than one country can produce mixed results.

Two points are easy to miss. First, the effective rate is measured against income computed under US principles, not the foreign tax return, so timing differences and deduction mismatches can pull the rate below where you expected. Second, the election interacts with everything else on the return, including foreign tax credits and the way losses are used.

When the exclusion helps, and when it hurts

The exclusion is most attractive where the foreign company sits in a genuinely taxed jurisdiction and the owner would otherwise pay an incremental layer of US tax with limited credit relief. For many individual shareholders in mainstream onshore countries, electing out of GILTI removes complexity and avoids a real cash cost.

It is less attractive, and sometimes harmful, in three situations. Where foreign tax is low, the income simply will not qualify, so the election does nothing. Where the US shareholder is a corporation that can already shelter GILTI efficiently with credits and deductions, excluding the income may waste foreign tax credits that would otherwise have been useful. And where the company has losses or fluctuating margins, the year-to-year effective rate can swing across the threshold, making the position unstable.

Because the election generally binds across entities and cannot be selectively applied, the right answer depends on the whole structure, not one company in isolation. We have seen owners elect in to solve one entity's problem and inadvertently worsen the group result.

Coordinating with the wider structure

The high-tax exclusion should never be decided in a vacuum. It sits alongside the check-the-box rules that determine whether a foreign entity is even treated as a corporation, the Subpart F rules that can tax passive income regardless of GILTI, and the question of whether a US shareholder should hold through a US C-corporation or directly.

A frequent and effective combination is to interpose a US C-corporation as the shareholder of the foreign company, so that the corporate GILTI mechanics, deductions and credits apply, with the high-tax exclusion considered as one tool among several rather than the whole answer. For other owners, direct ownership with a so-called section 962 election produces a better outcome. There is no single correct structure; the analysis turns on the owner's other income, residency plans and exit horizon.

Substance matters too. The exclusion depends on real foreign tax being paid, which in turn depends on the company being genuinely resident and managed where it claims to be. Thin or artificial arrangements that reduce foreign tax can push income below the threshold and, separately, attract challenge under anti-avoidance and economic-substance rules.

Common pitfalls we see

The most damaging mistake is treating the election as permanent and forgettable. Effective rates move with profitability, foreign rate changes and currency, so a structure that qualifies comfortably in one year may fall short in the next. The position needs annual review.

A second pitfall is ignoring the US-basis recomputation. Owners often assume that a headline foreign rate above the threshold guarantees qualification. Because the test uses income measured under US rules, timing items, non-deductible expenses and depreciation differences routinely change the result.

A third is poor record-keeping at the tested-unit level. The granular testing means you need clean books that can be broken down by jurisdiction and activity. Attempting to reconstruct this years later, often during an examination, is painful and expensive.

Finally, owners frequently overlook state tax. Several US states do not follow the federal treatment of GILTI or the exclusion, so a clean federal result can still leave a state liability that was never modelled.

How HPT helps

We work with US owners of foreign companies to model the GILTI position across the whole structure, decide whether the high-tax exclusion, a corporate holding layer, a section 962 election or a combination produces the best after-tax result, and then build the substance and record-keeping needed to support the position year after year. Our role is to make the election a deliberate, reviewable part of a coherent plan rather than a one-off filing decision.

If you own a company abroad and want clarity on whether the GILTI high-tax exclusion is working for or against you, we would be glad to review your structure.