The QBI Deduction Explained: Are You Claiming the Full 20%?
The Section 199A qualified business income deduction can wipe out 20% of your business income — but income limits, entity type, and SSTB rules cause many owners to miss part of it.
The Section 199A qualified business income (QBI) deduction lets eligible pass-through business owners deduct up to 20% of their qualified business income. For a business with $300,000 of qualified income, that is a $60,000 deduction — with no cash outlay required. Yet many owners claim less than the full amount they are entitled to.
How the deduction is calculated
The base calculation is 20% of qualified business income from each eligible trade or business. But once taxable income crosses certain thresholds, two limits begin to apply: a wage-and-property limit and a restriction on specified service trades or businesses (SSTBs).
- 20% of QBI is the starting point for each eligible business
- Above income thresholds, the deduction is capped by 2.5% of W-2 wages plus 2.5% of property basis
- SSTBs — health, law, accounting, consulting, performing arts — face a full phase-out above the upper threshold
- Engineering and architecture are specifically excluded from the SSTB list
Where owners lose part of the deduction
The wage-and-property limit is the most common culprit. A high-income business with few employees and little depreciable property can see its QBI deduction sharply reduced once income crosses the threshold. The fix is rarely obvious — it usually requires proactive planning around wages, entity structure, and the timing of asset purchases.
QBI is not something you simply compute at filing time. The factors that determine your deduction — wages, property, entity type, income level — are set during the year. Optimizing them in advance is what protects the full 20%.
Strategies that protect the deduction
- Adjust W-2 wages to clear the wage-and-property limit where it helps
- Time asset purchases to increase the property basis used in the limit
- Consider entity restructuring to separate SSTB from non-SSTB income
- Manage taxable income around the threshold bands with retirement and timing strategies
Are you claiming the full 20%?
If your income is near the thresholds or your business has limited wages and property, you may be leaving part of the QBI deduction on the table. Book a free discovery call to learn how QBI planning works and whether a Comprehensive Consultation is right for you.
Disclaimer: This article is provided for educational purposes only and does not constitute tax, legal, or financial advice. Tax strategies depend on your individual circumstances. Consult a qualified professional before acting on anything described here.
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