The Qualified Business Income (QBI) deduction under Section 199A — a 20% deduction against income from a sole proprietorship, partnership, S corporation, or other pass-through business — was due to expire after 2025. The One Big Beautiful Bill Act (OBBBA), signed into law in July 2025, made it permanent instead, and for 2026 it also widened the income bands that determine how much of the deduction higher earners actually get. For self-employed Americans running a UK consultancy, freelance practice, or S-corp-style business abroad, this is one of the more valuable and least understood tools in the current US tax code.
This guide sets out exactly how the QBI deduction works for 2026, the new inflation-adjusted thresholds, who is restricted by the specified-service business rules, and — critically for TaxStone's client base — how it interacts with the Foreign Earned Income Exclusion, the Foreign Tax Credit, and self-employment tax for Americans self-employed in the UK.
What the QBI deduction actually is
Section 199A allows eligible taxpayers to deduct up to 20% of their qualified business income from a sole proprietorship, partnership, S corporation, trust, or estate, plus 20% of qualified REIT dividends and qualified publicly traded partnership income. It is available whether or not you itemize deductions, and it reduces taxable income rather than being a credit — the IRS's own guidance on the deduction confirms the headline 20% figure and that income earned through a C corporation, or as an employee, does not qualify. For a self-employed American, this can meaningfully reduce the US income tax due on business profits, on top of whatever exclusions or credits already apply to foreign-earned income.
Made permanent under the One Big Beautiful Bill
Before OBBBA, the QBI deduction was scheduled to sunset after the 2025 tax year along with several other provisions of the 2017 Tax Cuts and Jobs Act. OBBBA removed that sunset entirely, so the deduction is now a permanent fixture of the tax code rather than something to plan around losing. For anyone who structured a UK-based sole trade or S-corp specifically to take advantage of QBI, this removes a major planning uncertainty that existed right up until mid-2025.
The 2026 income thresholds
- Below $201,750 (single/head of household) or $403,500 (married filing jointly): full 20% deduction with no restriction, regardless of business type or W-2 wages paid.
- Between $201,750 and $276,750 (single) or between $403,500 and $553,500 (MFJ): a phase-in zone — restrictions for specified service businesses and the wage/property limitation start to apply gradually.
- Above $276,750 (single) or $553,500 (MFJ): specified service businesses get no QBI deduction at all; other businesses are fully subject to the W-2 wage/UBIA limitation.
- These figures are the inflation-adjusted 2026 thresholds; OBBBA widened the phase-in range itself from $50,000/$100,000 to $75,000/$150,000 (single/MFJ), which is why the gap between the lower and upper thresholds is now wider than under the original 2017 rules.
How the phase-in actually works
Inside the phase-in zone, the restrictions that apply above the upper threshold — the specified-service exclusion and the wage/property limitation — are applied gradually rather than all at once, in proportion to how far through the zone your taxable income falls. A self-employed consultant with income just above the lower threshold loses only a small fraction of the full deduction; one close to the upper threshold loses nearly all of it if their business is a specified service, or faces close to the full wage/property limitation if it is not. This gradual phase-in is precisely why the 2026 widening of the range (to $75,000/$150,000) matters: it gives more taxpayers a longer runway before the restrictions bite fully.
Specified service trades or businesses (SSTBs)
Certain business types are treated as "specified service trades or businesses" and lose the QBI deduction entirely once income exceeds the upper threshold, regardless of W-2 wages paid or property owned. This category covers a wide range of the professional services common among Americans working for themselves abroad.
- Health, law, accounting, actuarial science, and consulting.
- Financial services, investment and investment management, and brokerage services.
- Athletics and performing arts.
- Any trade or business where the principal asset is the reputation or skill of one or more of its employees or owners.
- Notably excluded from SSTB treatment: engineering and architecture, which retain full QBI eligibility even at high income.
The W-2 wage and UBIA limitation for non-SSTB businesses
For businesses that are not specified services, income above the upper threshold does not lose the deduction outright — instead it becomes capped at the greater of 50% of W-2 wages the business pays, or 25% of W-2 wages plus 2.5% of the unadjusted basis immediately after acquisition (UBIA) of qualified property the business owns. This is why a solo consultant with no employees and no significant business property can end up with a far smaller deduction at high income than a business of similar profitability that runs payroll or owns equipment — the wage/property limitation specifically rewards businesses with a real payroll or capital base, not just a sole owner billing hours.
The new $400 minimum deduction
OBBBA also introduced a $400 minimum QBI deduction for taxpayers with at least $1,000 of qualified business income from a trade or business in which they materially participate, available even if the standard 20% calculation (after any limitations) would produce less. This minimum is indexed for inflation after 2026, so it will rise gradually, but for now it mainly benefits very small or newly established sole trades where the standard calculation would otherwise yield a negligible deduction.
Why this matters specifically for Americans self-employed in the UK
A US citizen running a UK-based consultancy, freelance practice, or single-member LLC taxed as a sole proprietorship is generally still eligible for the QBI deduction on that business's qualifying income, because Section 199A does not require the business to be US-based — it requires the income to be qualified business income reportable on a US return. This makes QBI one of the more valuable, and more overlooked, US deductions available to self-employed Americans abroad, since many assume (incorrectly) that a wholly foreign-located business is somehow outside its scope.
The interaction with the Foreign Earned Income Exclusion
This is the detail that catches people out: income excluded from US taxable income under the Foreign Earned Income Exclusion is not qualified business income for QBI purposes, because QBI only applies to income that is actually included in your US taxable income. If you use the FEIE to exclude your entire self-employment profit, there is no remaining taxable QBI to apply the 20% deduction against — the exclusion and the deduction cannot both apply to the same dollar of income. For self-employed Americans in the UK weighing FEIE against the Foreign Tax Credit, QBI eligibility is one more factor tilting the comparison, since claiming the Foreign Tax Credit instead (leaving the income taxable, but credited for UK tax paid) can preserve QBI eligibility on that same income where FEIE would not.
QBI does not reduce self-employment tax
The 20% QBI deduction reduces income tax only — it has no effect on self-employment tax, which is calculated on net self-employment earnings before the QBI deduction is applied. A self-employed American in the UK can therefore still owe substantial self-employment tax even where FEIE, the Foreign Tax Credit, and QBI between them significantly reduce or eliminate US income tax, unless a UK/US totalization agreement certificate applies to exempt the self-employment tax itself. Because QBI does not touch this figure, it should not be relied on when estimating whether US quarterly payments are needed — our US Quarterly Estimated Tax Calculator factors self-employment tax in separately from the income-tax side.
Sole proprietors vs S-corp owners
How QBI is calculated differs by structure. A sole proprietor's full net profit (after ordinary business expenses) generally counts as QBI. An S-corp owner only gets QBI treatment on the pass-through business profit distributed as an S-corp shareholder — reasonable W-2 salary paid to the owner-employee is not QBI, since wages from your own S corporation are employee compensation, not qualified business income. This creates a genuine trade-off: paying yourself a higher salary from an S-corp increases W-2 wages (useful for the wage limitation at high income) but shrinks the pool of profit that actually qualifies for the 20% deduction, so the salary-versus-distribution split is worth modelling each year rather than fixing once and forgetting it.
Common mistakes with QBI for Americans abroad
- Assuming a wholly UK-based business is automatically outside the scope of a US deduction — it is not; QBI follows the income, not the business's location.
- Claiming FEIE on the full self-employment profit without checking whether keeping some income taxable (via the Foreign Tax Credit) would preserve a larger overall QBI benefit.
- Forgetting that QBI has zero effect on self-employment tax, and underestimating US quarterly payments as a result.
- Misclassifying a genuinely SSTB business (consulting, financial services, and similar categories are broader than many expect) and claiming a deduction that phases out entirely above the upper threshold.
- S-corp owners not revisiting their salary-versus-distribution split now that the 2026 thresholds and wage limitation have shifted.
Record-keeping that supports a QBI claim
Because QBI depends on correctly separating qualified business income from wages, guaranteed payments, capital gains, and any FEIE-excluded income within the same return, clean books matter more than the 20% headline figure suggests. Self-employed Americans in the UK should keep a clear reconciliation showing gross business profit, the portion (if any) excluded under FEIE, the portion left taxable and therefore QBI-eligible, and — for S-corp owners — the split between W-2 salary and shareholder distributions. This is also the exact reconciliation a UK accountant moving onto Making Tax Digital for Income Tax will already be producing for UK purposes, so the two record-keeping exercises can largely share the same underlying data rather than being built twice.
Get your 2026 QBI position modelled properly
The QBI deduction being made permanent removes the sunset risk that made it hard to plan around before 2026, but the FEIE interaction, the SSTB rules, and the S-corp salary trade-off mean the actual dollar benefit varies enormously between otherwise similar self-employed Americans in the UK. A US/UK tax specialist can model FEIE versus Foreign Tax Credit specifically with QBI eligibility in mind, check whether your consultancy falls inside the SSTB definition, and, for S-corp owners, run the salary-versus-distribution numbers for the current thresholds.
