Glossary term
Qualified Business Income (QBI)
Qualified business income is the net qualified income, gain, deduction, and loss from an eligible trade or business for Section 199A deduction purposes.
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What Is Qualified Business Income (QBI)?
Qualified business income, or QBI, is the net amount of qualified income, gain, deduction, and loss from an eligible trade or business. It is a key input in calculating the qualified business income deduction under Section 199A.
QBI is not simply gross revenue. It is generally calculated after business deductions and exclusions, and it does not include every type of income connected with a business owner.
Key Takeaways
- QBI is the income base used for the Section 199A deduction.
- It generally comes from a qualified trade or business operated through a pass-through structure.
- It excludes certain investment income, employee wages, and guaranteed payments.
- Correctly identifying QBI is separate from determining the final QBI deduction.
How QBI Works
A taxpayer first identifies income connected with a qualified trade or business. Then the taxpayer applies the QBI rules to determine which items count. The resulting QBI amount can feed into the QBI deduction calculation.
For a sole proprietor, QBI may begin with net profit from the business. For an S corporation or partnership owner, QBI may flow through from the entity. But the final amount can be affected by losses, allocations, business type, and other tax rules.
What May Be Included or Excluded
Item | Typical QBI Treatment |
|---|---|
Net business income | May be included if from a qualified trade or business |
Capital gains | Generally excluded |
Interest and dividends | Often excluded unless properly connected with business activity |
Employee wages | Not QBI to the employee |
Guaranteed payments to partners | Generally excluded from QBI |
QBI Versus the QBI Deduction
QBI is the income measure. The QBI deduction is the tax deduction calculated from that measure after applying Section 199A rules. A taxpayer can have QBI and still receive a reduced deduction because of taxable income limits, business classification, W-2 wage limits, qualified property limits, or losses.
This distinction matters because planning around QBI often starts with the business's actual income and expenses, while the deduction depends on the owner's full tax return.
The Bottom Line
Qualified business income is the core income figure behind the QBI deduction. It helps determine the possible deduction for pass-through business owners, but it is only one part of a larger Section 199A calculation.