Every few years, a piece of tax legislation comes along that genuinely changes the math for small business owners. The reconciliation bill enacted earlier this year is one of them. The National Federation of Independent Business (NFIB) has called it the most significant small-business tax win in years — yet the majority of owners filing as sole proprietors, S-corps, or partnerships have not yet factored the new provisions into their quarterly estimates.
This post translates the key changes into plain language, explains who benefits most, and tells you exactly what to flag for your accountant before your next estimated payment.
What Changed in 2026
The reconciliation bill made several changes relevant to small business owners. The three most impactful for local operators:
1. Expanded Pass-Through Deduction
The Section 199A pass-through deduction — which allows owners of pass-through entities to deduct a portion of their qualified business income (QBI) — was extended and expanded. Under previous law the deduction was set to expire; it is now permanent and the percentage has been modestly increased.
For a business owner with $200,000 in qualified business income, the difference between the old rate and the new rate can represent several thousand dollars in additional deduction. The deduction is generally available to sole proprietors, S-corp shareholders, and partners in a partnership, subject to income thresholds and business-type rules.
2. Adjusted Income Thresholds
The income thresholds above which the deduction begins to phase out (and where additional restrictions apply for certain service businesses) were increased and indexed to inflation going forward. This is meaningful for owners who previously fell into the phase-out zone and received a reduced benefit.
3. Increased Section 179 Expensing Limits
The Section 179 deduction — which lets you immediately expense the full cost of qualifying equipment and software rather than depreciating it over years — also saw its limits increase. If you purchased a commercial oven, a service vehicle, a point-of-sale system, or other qualifying business property this year, you may be able to deduct the entire cost in 2026.
Who Benefits Most
Sole proprietors and single-member LLCs filing on Schedule C see the most straightforward benefit from the expanded QBI deduction — there is no separate corporate layer.
S-corp shareholders also benefit, but the calculation is more complex. Your QBI is your distributive share of business income, not your W-2 wages from the company. Your accountant needs to run this specifically for your situation.
C-corps do not benefit from the pass-through deduction at all — this is specifically for pass-through structures. If you operate as a C-corp and your revenue is in the range where conversion to S-corp could make sense, it may be worth modeling.
Service businesses (lawyers, consultants, financial advisors) have historically faced more restrictions on the QBI deduction at higher income levels. The 2026 changes did not fully eliminate those restrictions, so if you run a professional service firm, verify your eligibility with a CPA rather than assuming you qualify at full rates.
How to Estimate Your Savings
NFIB has published a calculator at nfib.com that allows you to input your business structure, estimated net income, and filing status to get a rough estimate of your additional tax benefit under the new rules. It is not a substitute for professional advice, but it is a useful starting point for understanding the magnitude before your accountant runs the real numbers.
As a rough rule of thumb: if your business generates $100,000–$500,000 in qualified business income and you are currently filing as a pass-through, the expanded deduction could reduce your federal tax liability by $2,000–$15,000 depending on your specific situation. That range is wide because the calculation depends on your total income, filing status, and whether your business type qualifies.
What to Do Before Your Next Quarterly Payment
Quarterly estimated tax payments are due in April, June, September, and January. If you have not yet adjusted your Q3 or Q4 estimates to reflect the new deduction levels, you may be overpaying throughout the year.
Steps to take now:
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Call your accountant and ask specifically: “Have you factored the 2026 reconciliation bill pass-through deduction changes into my quarterly estimates?” If they have not heard of the NFIB calculator, send them the link.
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Pull your most recent Schedule C or K-1 so you have your baseline QBI figure ready for the conversation.
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Check your Section 179 eligibility if you made any major equipment purchases this year. List the items with their purchase dates and costs.
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Review your business structure if you are currently a C-corp or have not revisited your entity election in several years. The pass-through advantage has widened.
One Caution
Tax law is complex, and the summaries above are necessarily simplified. Phase-outs, service-business limitations, W-2 wage tests, and state-level conformity all affect the actual benefit you receive. The goal of this post is to make sure you know to ask the question — not to replace a conversation with a qualified tax professional who knows your specific situation.
The deduction exists. The calculator is free. The only thing between you and capturing this benefit is a conversation you probably have not had yet.
