Section 199A QBI Deduction for Cross-Border Filers

The Section 199A qualified business income (QBI) deduction allows eligible taxpayers to deduct up to 20% of their qualified business income from pass-through entities (sole proprietorships, S corporations, partnerships) and qualified REIT dividends. For cross-border filers, the deduction creates two layers of complexity: first, whether foreign-source business income qualifies as QBI at all, and second, how the deduction interacts with the foreign tax credit. The answers are not intuitive, and getting them wrong either leaves money on the table or creates an audit risk.

What income qualifies as QBI?

QBI is the net amount of qualified items of income, gain, deduction, and loss from any qualified trade or business of the taxpayer. The requirements:

1. Qualified trade or business. Any trade or business under IRC 162, except the trade or business of being an employee. Specified service trades or businesses (SSTBs: health, law, accounting, consulting, athletics, financial services, brokerage, and “any trade or business where the principal asset is the reputation or skill of one or more of its employees or owners”) are subject to phase-outs at higher income levels.

2. Effectively connected income. Under IRC 199A(c)(3)(A)(i), QBI includes only items that are “effectively connected with the conduct of a trade or business within the United States.” This is the critical rule for cross-border filers: income that is foreign-source or not ECI does not count.

3. Pass-through income. QBI comes from sole proprietorships (Schedule C), S corporations (K-1), partnerships (K-1), and qualified REIT dividends. C corporation income is not QBI (it gets the corporate rate instead). Income from a CFC included under Subpart F or GILTI is not QBI.

Does my Canadian business income qualify?

It depends on whether the income is “effectively connected with a US trade or business”:

Canadian sole proprietorship or partnership, no US operations. If you are a US citizen living in Canada running a Canadian business with no US office, no US employees, and no US customers whose income constitutes ECI, the business income is not ECI and does not qualify for the Section 199A deduction. The income is reported on your US return (worldwide income), but the QBI deduction does not apply.

Canadian business with US operations. If your Canadian business has a US office, US employees, or US-source income that constitutes ECI (for example, a Canadian consulting firm that performs services in the US through a fixed place of business), the ECI portion may qualify for the QBI deduction. The non-ECI portion does not.

US sole proprietorship of a cross-border resident. If you are a US resident running a US-based business (even if you are also a Canadian citizen or were recently a Canadian resident), the income is ECI and qualifies for the QBI deduction, subject to the SSTB and income limitations.

US rental property. Rental income from US real property qualifies as QBI if the rental activity rises to the level of a trade or business. The IRS safe harbor (Rev. Proc. 2019-38) requires 250+ hours of rental services per year per property (or group of properties), or the activity must be a trade or business under common-law standards (regular, continuous, and considerable activity). Passive rental income that does not meet the safe harbor or common-law standard does not qualify.

How does the QBI deduction interact with the FTC?

This is where cross-border filers get the most value (or lose it). The QBI deduction reduces your US taxable income, which in turn reduces the FTC limitation:

FTC limitation formula: The foreign tax credit is limited to (foreign-source taxable income / total taxable income) x US tax liability. When the QBI deduction reduces total taxable income (the denominator), it increases the FTC limitation ratio, which means more of your Canadian taxes can be credited. This is counterintuitive but beneficial: the QBI deduction and the FTC work together, not against each other.

However, the QBI deduction does not directly affect the numerator (foreign-source taxable income), because QBI is by definition ECI (domestic-source). So the deduction reduces total taxable income without reducing foreign-source income, which means the FTC limitation fraction gets larger (better for the taxpayer).

Stacking. If you have both QBI from a US business and foreign-source income from Canadian employment or business, the QBI deduction and FTC can both reduce your US tax on the same return. The QBI deduction is not available for income that is not ECI, but the FTC applies to all foreign-source income.

What about Subpart F and GILTI?

Income included under Subpart F or GILTI from a Canadian controlled foreign corporation is explicitly excluded from QBI under IRC 199A(c)(3)(A)(ii). This means:

• If you are a US citizen owning a Canadian corporation (CCPC), the Subpart F and GILTI inclusions on your US return do not qualify for the 20% QBI deduction.
• If the same income were earned through a Canadian sole proprietorship instead of a corporation, it still would not qualify (because it is not ECI).
• The QBI deduction does not help reduce the US tax on CFC income. The deemed-paid FTC under IRC 960 is the mechanism for offsetting that tax.

What about the SSTB limitation?

The SSTB limitation phases out the QBI deduction for specified service trades or businesses (health, law, accounting, consulting, financial services, and others) when taxable income exceeds the threshold:

• 2025 thresholds: $191,950 (single) / $383,900 (MFJ). The deduction phases out over the next $50,000 (single) / $100,000 (MFJ).
• Above the phase-out range, zero QBI deduction for SSTBs.

For cross-border filers, the threshold is measured against US taxable income (after the FTC reduces it). If your Canadian taxes generate a large FTC that reduces your US tax liability, your taxable income may still be above the SSTB threshold even though your net US tax is low.

Accounting firms: A cross-border CPA running a US-based practice is in an SSTB. If their taxable income is below the threshold, the 20% deduction applies. Above the threshold, it phases out. A Canadian CPA firm’s income that is not ECI does not qualify regardless of income level.

What about US rental income for cross-border landlords?

A Canadian resident who owns US rental property and files a 1040-NR can potentially claim the QBI deduction on US rental income, because the rental income (when the 871(d) election is made) is treated as ECI. However:

• The rental must rise to the level of a trade or business (250+ hours safe harbor or common-law standard).
• The 1040-NR filer’s QBI deduction is limited to ECI, and the calculation uses only the ECI portion of taxable income.
• Most single-property rentals managed by a property manager do not meet the 250-hour safe harbor, and the common-law standard is harder to satisfy.

For US residents (including Canadians who moved to the US) with US rental property, the same rules apply: the rental must be a trade or business, and the income must be ECI (which it is, because US rental income is US-source).

What should I do next?

If you have US-source business or rental income alongside Canadian-source income, check whether the US-source income qualifies as QBI. The deduction is worth up to 20% of the qualifying income, subject to the W-2/UBIA limitations and the SSTB phase-out.

• Incorporating cross-border, the entity comparison for cross-border businesses
• Self-employed cross-border tax, freelancer and sole proprietor issues
• CFC overview, why CFC income does not qualify for QBI
• US rental income: 871(d) election, the election that makes rental income ECI
• Form 1040-NR for Canadians, the non-resident return where QBI may apply to US rental income

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.