Owning more than one pass-through business can make the qualified business income deduction more valuable—and much easier to miscalculate. For 2026, business owners need to look beyond each Schedule C, K-1, or S corporation in isolation. Losses, W-2 wages, qualified property, and the option to aggregate related businesses can all change the final Section 199A result.
This matters for owners in Northern Virginia and Washington, DC who operate through several LLCs, partnerships, or S corporations. A sound review starts with one coordinated picture of every activity, followed by a business-by-business analysis. The goal is not to force a larger deduction; it is to claim the deduction supported by the facts and document each decision.
What changed for the 2026 QBI deduction?
Public Law 119-21 extended and enhanced Section 199A for tax years beginning after December 31, 2025. The law widened the income ranges over which the wage, property, and specified-service-business limits phase in. It also added a $400 minimum deduction for an eligible taxpayer with at least $1,000 of aggregate QBI from active qualified trades or businesses in which the taxpayer materially participates.
For 2026, the IRS inflation-adjustment guidance sets the lower and upper income bands at $403,500 and $553,500 for married couples filing jointly; $201,775 and $276,775 for married individuals filing separately; and $201,750 and $276,750 for other returns. These amounts refer to taxable income before the QBI deduction, not business revenue or gross profit.
Why multiple businesses require one combined view
The QBI deduction may be up to 20% of qualified business income, subject to an overall taxable-income limit and, for taxpayers above the applicable threshold, possible W-2 wage, qualified-property, and specified service trade or business limitations. Each business generally begins as a separate calculation. However, negative QBI from one activity is not ignored: it must offset positive QBI from other businesses under the loss-netting rules. An overall negative QBI amount generally carries forward for Section 199A purposes.
Aggregation is a separate decision. When eligible businesses are treated as one group, their QBI, W-2 wages, and unadjusted basis immediately after acquisition of qualified property are combined before applying the wage-and-property limitation. Aggregation can help in the right fact pattern, but it is optional and does not convert a nonqualifying activity into a qualified trade or business.
Five practical actions before year-end
1. Map each trade or business
List every sole proprietorship, partnership interest, S corporation, and rental activity that may rise to the level of a trade or business. For each one, identify projected QBI, W-2 wages, qualified property, ownership percentage, tax year, and whether it may be a specified service trade or business. Do not include employee wages or income earned through a C corporation as QBI.
2. Project taxable income—not just business profit
Your household’s taxable income determines whether the wage, property, and specified-service limitations are inactive, partially phased in, or fully applicable. Build a full-year projection that includes wages, investment income, capital gains, retirement income, deductions, and every pass-through business. A profitable business can still produce a smaller deduction when the owner’s total taxable income crosses a 2026 band.
3. Model loss netting before assuming a deduction
If one business is expected to lose money, measure how that loss reduces positive QBI from the others. The IRS instructions for Form 8995-A use Schedule C for current-year loss netting and qualified business loss carryforwards. Keep the QBI loss schedule separate from the tax-return schedules that determine whether the underlying loss is currently deductible.
4. Test whether aggregation is permitted and useful
Under the final Treasury regulations for Section 199A, aggregation generally requires at least 50% common ownership for a majority of the tax year, including the last day; the same tax year; no specified service business in the group; and at least two operational connections. Those connections involve offering the same or complementary products, property, or services; sharing facilities or significant centralized functions; or operating in coordination or reliance.
Passing the test does not automatically mean aggregation produces the best result. Compare separate and aggregated calculations using supportable year-end estimates. The benefit often depends on whether one business has QBI but limited wages or property while another eligible, integrated business has the wage or property base.
5. Document the choice and report it consistently
An aggregation election carries forward. The regulations generally require consistent reporting in later years and an annual disclosure identifying the aggregated trades or businesses. Save the ownership records, organizational charts, shared-service agreements, payroll information, fixed-asset detail, and written analysis supporting the operational factors. Revisit the group after acquisitions, dispositions, ownership changes, or operational separation.
2026 QBI planning checklist
- Prepare a 2026 taxable-income projection for the owner’s full return.
- Collect projected QBI, W-2 wages, and qualified-property detail for each business.
- Identify specified service businesses and current or carried-forward QBI losses.
- Compare separate and permitted aggregated calculations.
- Preserve the facts supporting common ownership and operational integration.
- Plan for Form 8995-A schedules and annual aggregation disclosures.
When should business owners act?
Start before the fourth quarter closes. A year-end projection leaves time to correct bookkeeping classifications, obtain missing K-1 estimates, review reasonable compensation, and understand how planned income or deductions may move taxable income through a phase-in range. The analysis should be refreshed after material transactions and again when final tax forms arrive.
How Reckenen can help
Reckenen provides proactive tax strategy and tax compliance and preparation services to closely held businesses and their owners in Northern Virginia and Washington, DC, with selected services available nationwide. We can build a coordinated 2026 projection, evaluate Section 199A aggregation, and align the supporting records across your entities.
This article is for general informational purposes only and is not tax, legal, or investment advice. Tax outcomes depend on individual facts and applicable federal, state, and local law. Consult a qualified professional before acting.