If your pass through business had a good year, there is a real chance your best year end tax move has nothing to do with buying equipment or maxing out a retirement plan. It has to do with protecting a deduction you may not even realize is at risk: the Qualified Business Income deduction under Section 199A. For many South Florida business owners, this single deduction is worth tens of thousands of dollars, and a few thousand dollars of income in the wrong place can quietly cut it in half.

The QBI deduction allows owners of sole proprietorships, partnerships, S corporations, and certain trusts to deduct up to 20% of their qualified business income on their personal return. It was set to expire after 2025, but the Big Beautiful Bill made the deduction permanent, so Section 199A planning is no longer a "use it while it lasts" exercise. It is now a permanent part of your tax strategy, which means it deserves permanent attention every fourth quarter.

What the QBI Deduction Actually Protects

At its core, the QBI deduction lets eligible owners reduce their taxable income by 20% of their qualified business income from a pass through entity. This is not a business expense deduction. It is a personal deduction calculated on your Form 1040 based on income that already flowed through from your Schedule C, K-1, or rental activity.

The deduction phases in complexity once your taxable income crosses certain thresholds. Below the lower threshold, the calculation is simple: 20% of qualified business income, subject to an overall limit based on 20% of your taxable income minus net capital gains. Above the upper threshold, two things happen at once. First, specified service trades or businesses, meaning fields like law, accounting, consulting, health, and financial services, lose the deduction entirely. Second, all other businesses become subject to a wage and capital limitation that can cap or eliminate the benefit regardless of industry.

This is exactly why year end matters so much. The thresholds are based on your total taxable income, not just your business income. A spouse's W-2 raise, a stock sale, or a large Roth conversion can push a Coral Gables small business owner from the simple 20% calculation into the limited zone, sometimes without them noticing until their CPA runs the numbers in March.

The Income Thresholds That Decide Everything

For 2026, the phase in range for the wage and capital limitation and the specified service business exclusion widens gradually above the threshold amount for your filing status. The exact inflation adjusted thresholds for 2026 have not yet been issued in final guidance as of this writing, so we are working with projected ranges based on the 2025 figures plus expected inflation adjustments. What matters for planning purposes is understanding where you sit relative to last year's thresholds and assuming a similar range this year.

A Miami-area entrepreneur running a marketing agency structured as an S corporation is a good example. Marketing is generally not classified as an SSTB, so the wage and capital limitation is the real concern once taxable income climbs into the upper range. If that agency pays out $200,000 in W-2 wages and the owner's business income is $400,000, the deduction without limitation would be $80,000. But if the owner's total taxable income pushes them fully above the upper threshold, the deduction gets capped at 50% of W-2 wages, or $100,000, which in this case is not binding since $80,000 is already lower. The real danger shows up when wages paid are low relative to income, which is common in solo-owner consulting practices.

Case Study: The Consultant Who Lost $14,000 in One Afternoon

Consider a Coral Gables based independent financial consultant operating as a single member LLC with $350,000 in net business income. Financial services are explicitly classified as an SSTB. In late November, this consultant's spouse received a year end bonus and the couple also realized a $60,000 long term capital gain from a brokerage account rebalancing. That additional income pushed their joint taxable income from just inside the phase in range to just above the upper threshold.

Before the extra income, the consultant was entitled to a partial QBI deduction of roughly $14,000. After the phase in completed because an SSTB loses the deduction entirely above the upper threshold, that benefit dropped to zero. The capital gain itself was taxed at favorable long term rates, but it cost the household $14,000 in lost deductions elsewhere, an outcome nobody flagged until tax season.

This is the scenario we walk through constantly with clients using our business tax strategy planning process. The fix in this case would have been timing the capital gain realization into January 2027 instead of December 2026, or accelerating a deductible retirement contribution before year end to pull taxable income back under the threshold.

Six Year End Moves That Protect Your QBI Deduction

1. Run a projection before December 1. Waiting until your return is prepared means the window to act has already closed. A projection using actual year to date numbers plus expected Q4 activity tells you exactly where you sit relative to the thresholds.

2. Increase retirement plan contributions. A Solo 401(k) or SEP IRA contribution reduces taxable income dollar for dollar, which can pull an S corporation owner back under the phase in threshold and preserve a larger QBI deduction.

3. Time capital gains and losses deliberately. If you are near the threshold, consider deferring a gain into the next tax year or harvesting a loss before December 31 to offset income that would otherwise crowd out your deduction.

4. Review W-2 wages paid by your S corporation. If you are subject to the wage limitation, increasing reasonable compensation or adding a year end bonus to employees can raise the wage base used in the 50% test, though this must be balanced against payroll tax costs.

5. Consider entity structure for SSTB owners. If you operate a specified service business near the upper threshold, aggregation rules and reasonable compensation planning require careful analysis. This is not a do it yourself project; it belongs in a conversation with your accountant before year end.

6. Coordinate spousal income timing. Bonuses, RSU vesting, and freelance income for a spouse all count toward the household's taxable income for QBI purposes. If you have any control over timing, a conversation in October is far more valuable than one in April.

Why South Florida Business Owners Face Unique Pressure Points

Florida has no state income tax, which already makes South Florida an attractive place to run a pass through business. But that same advantage means Miami-Dade County entrepreneurs often have higher federal taxable income relative to peers in high tax states, since there is no state deduction cushioning the number. A Coral Gables physician practice, a Brickell real estate investment group, or a Doral logistics company can all find themselves closer to the QBI thresholds than they expect, purely because Florida's tax climate rewards keeping more income on the federal return.

Real estate is another area where South Florida owners need extra care. Rental real estate can qualify for QBI treatment if it rises to the level of a trade or business under the safe harbor rules, but many investors assume this automatically without documenting hours and activities the way the safe harbor requires. If you are a Miami-area investor relying on the QBI deduction for a rental portfolio, your small business bookkeeping records need to clearly show the time and effort that supports trade or business treatment.

How WAYG Builds QBI Protection Into Your Year End Plan

Protecting the QBI deduction is not a single action item. It requires looking at your entire household's income picture, your entity structure, your retirement contributions, and your timing decisions together, which is exactly what our virtual CPA services are built around. Rather than treating your tax return as a once a year event, we track your numbers through managed accounting support so there are no surprises when the thresholds move.

A short planning session in October or November costs far less than the deduction most owners stand to lose by waiting. We have seen the difference a single conversation makes, whether it saves $4,000 through a retirement contribution or $14,000 through gain timing.

Frequently Asked Questions

Q: What is the Qualified Business Income deduction? A: The QBI deduction under Section 199A lets owners of sole proprietorships, partnerships, S corporations, and some trusts deduct up to 20% of their qualified business income on their individual tax return. It is calculated after your business income flows through to your Form 1040 and is subject to income based limitations once your taxable income rises above certain thresholds.

Q: Is the QBI deduction still available for 2026 and beyond? A: Yes. The Big Beautiful Bill made the Section 199A deduction permanent, removing the scheduled expiration that previously applied after 2025. This means year end QBI planning is now a recurring part of annual tax strategy rather than a one time rush.

Q: Why would a capital gain hurt my QBI deduction if it is taxed separately? A: Capital gains are included in your total taxable income, which is the figure used to determine whether you fall within the phase in range or above the upper threshold for QBI purposes. Even though the gain itself is taxed at favorable rates, it can push your taxable income high enough to reduce or eliminate your Section 199A deduction on unrelated business income.

Q: Does my Miami or Coral Gables business qualify for the QBI deduction if it is a specified service business? A: Specified service trades or businesses, such as law, accounting, consulting, and financial services, can still claim the full QBI deduction if your taxable income is below the lower threshold. The deduction phases out through the middle range and disappears entirely once your taxable income exceeds the upper threshold, regardless of where in South Florida or elsewhere your business operates.

Q: What is the most common mistake South Florida business owners make with QBI planning? A: The most common mistake is waiting until tax season to look at the numbers, by which point the opportunity to shift income, time a capital gain, or increase a retirement contribution has already passed. Florida's lack of a state income tax means federal taxable income runs higher for many owners, making it even more important to project your position before December 31.

Q: How do I know if my rental real estate qualifies for the QBI deduction? A: Rental real estate can qualify if it meets the IRS safe harbor requirements, which generally call for at least 250 hours of rental services per year along with contemporaneous records of the time, description, and dates of that work. Without documented bookkeeping that supports those hours, an investor risks losing the deduction on audit even if the activity genuinely functions as a trade or business.

Protect Your Deduction Before the Year Closes

The Qualified Business Income deduction rewards planning and punishes inattention. Whether you run an S corporation in Coral Gables, a consulting practice in Brickell, or a rental portfolio across Miami-Dade County, the moves that protect your Section 199A benefit need to happen before December 31, not after your return is filed. A retirement contribution, a well timed capital gain, or a documented bookkeeping adjustment can be the difference between a full deduction and a partial one.

Our Coral Gables headquartered team works with South Florida business owners every fall to run these projections and put a concrete plan in place. If you want a clear answer on where you stand and what moves still make sense before year end, schedule a consultation with WAYG today.