TCJA and OBBBA Explained: A Small Business Owner's Tax Guide for 2026

When the Tax Cuts and Jobs Act (TCJA) passed in December 2017, it represented the most significant overhaul of the U.S. tax code in over 30 years. Nearly a decade later, those changes continue to shape how millions of small business owners manage their finances and plan for the future. But here's what many entrepreneurs don't realize: the tax landscape shifted dramatically again in July 2025 with the passage of the One Big Beautiful Bill Act (OBBBA), which made some provisions permanent while introducing entirely new deductions.

Whether you run a consulting firm, operate a retail shop, or freelance from your home office, understanding these tax law changes isn't optional—it directly affects your bottom line. This comprehensive guide breaks down what you need to know about Trump-era tax policies, recent updates, and how to maximize your tax savings in 2026 and beyond.

The Foundation: What the Tax Cuts and Jobs Act Changed

The TCJA fundamentally altered the tax structure for businesses of all sizes. For small business owners, the most significant changes centered on pass-through entities—the legal structures most commonly used by entrepreneurs, including sole proprietorships, partnerships, S corporations, and LLCs.

The Game-Changing Pass-Through Deduction

Perhaps the most impactful provision for small businesses was Section 199A, which created the Qualified Business Income (QBI) deduction. This provision allowed eligible business owners to deduct up to 20% of their qualified business income from their taxable income.

Here's a practical example: If your consulting business generated $100,000 in qualified business income in 2024, you could potentially deduct $20,000 from your taxable income. That's not a reduction in your tax bill—it's a reduction in the income that gets taxed in the first place, which can translate to thousands of dollars in tax savings depending on your tax bracket.

The QBI deduction wasn't unlimited, though. It came with phase-out thresholds based on income levels and certain types of service businesses faced additional restrictions. For the 2025 tax year, single filers with income above $191,950 and married couples filing jointly with income above $383,900 faced limitations on the deduction.

Corporate Tax Rate Reduction

While most small businesses operate as pass-through entities, those structured as C corporations saw an even more dramatic change. The corporate tax rate dropped from a progressive structure topping out at 35% to a flat 21% rate on all corporate income.

This reduction was permanent from the outset, unlike many individual provisions. However, for most small businesses, the C corporation structure still presents challenges due to double taxation—the corporation pays tax on its profits, and then shareholders pay tax again when those profits are distributed as dividends.

Other Key Business Provisions

The TCJA included several other provisions that affected small businesses:

Immediate Expensing: Section 179 expensing limits increased to $1 million, with the phase-out threshold rising to $2.5 million. Additionally, 100% bonus depreciation allowed businesses to immediately deduct the full cost of certain equipment and property purchases.

Interest Deduction Limits: For businesses with average annual gross receipts exceeding $30 million over the prior three years, the deduction for business interest expense became limited to 30% of adjusted taxable income.

Elimination of Certain Deductions: The law repealed deductions for entertainment expenses and limited the deduction for business meals to 50% (though this was temporarily increased to 100% during the pandemic years).

The 2025 Game-Changer: One Big Beautiful Bill Act

Just when business owners had finally wrapped their heads around the TCJA, the tax landscape shifted again. Many provisions of the original Trump tax cuts were scheduled to sunset at the end of 2025, potentially causing tax bills to spike dramatically for millions of businesses. Enter the One Big Beautiful Bill Act, signed into law on July 4, 2025.

This legislation fundamentally changed the trajectory of small business taxation by making some temporary provisions permanent and introducing entirely new deductions.

QBI Deduction Made Permanent—and Enhanced

The biggest news for pass-through business owners: the QBI deduction not only survived but was expanded. Instead of expiring after 2025 as originally planned, it's now permanent. Even better, starting in 2026, the deduction rate increased from 20% to 23%.

Let's revisit that earlier example. If your consulting business generates $100,000 in qualified business income in 2026, you can now deduct $23,000 instead of $20,000. Over years of running your business, this 3% increase compounds into significant tax savings.

The OBBBA also introduced a minimum QBI deduction starting in 2026. Taxpayers with at least $1,000 in qualified business income from active trades or businesses in which they materially participate may qualify for a minimum $400 deduction. This provision helps ensure that even smaller businesses with lower income levels receive some benefit.

Additionally, the income phase-out ranges expanded considerably:

• Single filers: $200,000 to $275,000 (previously $191,950 to $241,950)
• Married filing jointly: $400,000 to $550,000 (previously $383,900 to $483,900)

These broader ranges mean more business owners can claim the full deduction before facing limitations.

Tax Relief for Working Americans: Tips and Overtime Deductions

The OBBBA introduced two novel deductions that particularly benefit service businesses and their employees: tax-free tips and overtime pay.

Tips Deduction: For tax years 2025 through 2028, employees and self-employed individuals can deduct qualified tips received in occupations that customarily receive tips. The maximum annual deduction is $25,000 for employees, or for self-employed individuals, the deduction cannot exceed the net income from the business in which tips were earned.

This provision phases out for taxpayers with modified adjusted gross income over $150,000 ($300,000 for joint filers).

Overtime Deduction: Also effective for 2025 through 2028, individuals who receive qualified overtime compensation can deduct the premium portion of their overtime pay—generally the "half" portion of "time-and-a-half" compensation required under the Fair Labor Standards Act.

The maximum annual deduction is $12,500 ($25,000 for joint filers) and follows the same phase-out thresholds as the tips deduction.

What This Means for Small Business Owners

If you own a restaurant, salon, or any service business where employees receive tips, these provisions create a powerful recruiting and retention tool. While the tips deduction reduces your employees' tax burden, you still must record and report tips on W-2s or 1099s—the paperwork requirements haven't changed.

For businesses with hourly employees who regularly work overtime, the overtime deduction provides direct tax relief to your workforce. However, it's worth noting that these deductions expire after 2028, so long-term tax planning should account for their temporary nature.

Permanent Individual Tax Provisions Affecting Business Owners

Several individual tax provisions that affect how business owners file their personal returns were also made permanent:

Tax Rates and Brackets

The OBBBA permanently extended the TCJA's individual income tax rates, including the 37% top rate (which was scheduled to revert to 39.6%). For business owners who pay taxes through pass-through entities, these individual rates directly determine your effective tax rate on business income.

Standard Deduction

The enhanced standard deduction was not only made permanent but increased further. For 2026, it rises to $16,000 for single filers and $32,000 for married couples filing jointly. This matters for business owners because a higher standard deduction reduces your overall taxable income, including any business income you report on your personal return.

Estate and Gift Tax Exemption

Starting in 2026, the federal estate and gift tax exclusion amounts increased to $15 million for individuals and $30 million for married couples—up from $13.99 million per person in 2025. For entrepreneurs building valuable businesses with plans to transfer ownership to family members or exit via sale, this creates substantial estate planning opportunities.

SALT Deduction Cap Increase

One point of contention from the original TCJA was the $10,000 cap on state and local tax (SALT) deductions. The OBBBA temporarily increases this cap to $40,000 for tax years 2025 through 2029, reverting to $10,000 in 2030.

For small business owners in high-tax states like California, New York, or New Jersey, this provides meaningful relief for four years, though the temporary nature requires careful planning for the reversion.

Strategic Tax Planning for 2026 and Beyond

Understanding the law is one thing—using it strategically is another. Here's how to maximize the tax benefits available under current law:

Optimize Your Business Structure

The enhanced QBI deduction makes pass-through entities even more attractive for most small businesses. If you're currently operating as a sole proprietorship, converting to an S corporation might provide additional tax savings through optimal salary and distribution planning, while still qualifying for the full QBI deduction.

However, if you're planning to retain significant earnings in your business for expansion or have specific circumstances that make C corporation status beneficial (such as qualifying for Qualified Small Business Stock treatment), the permanent 21% corporate rate remains a compelling option.

Maximize Immediate Expensing

Section 179 expensing and bonus depreciation continue under current law. If you're planning equipment purchases, vehicles, or other qualifying property investments, timing these purchases strategically can optimize your tax position. Just be aware that bonus depreciation is scheduled to phase down from 100% to 80% in 2027 unless further legislation extends the full deduction.

Plan for the Temporary Provisions

While the QBI deduction is now permanent, other valuable provisions remain temporary:

• Tips and overtime deductions expire after 2028
• The enhanced SALT deduction cap reverts to $10,000 after 2029
• Bonus depreciation continues phasing down

Build your multi-year tax strategy with these sunset dates in mind. For instance, if you employ tipped workers, maximize the recruiting advantage of tax-free tips while the provision lasts, but don't build your compensation strategy entirely around a benefit that disappears in three years.

Consider Timing of Income and Expenses

With the QBI deduction now at 23% and phase-out thresholds expanded, managing your taxable income to stay within favorable ranges becomes even more important. Strategies like timing large equipment purchases, bunching deductible expenses into particular tax years, or deferring income when approaching phase-out thresholds can meaningfully impact your tax bill.

Document Everything

The QBI deduction comes with complex rules around qualified trades or businesses, specified service trades or businesses, and W-2 wage and qualified property limitations. Proper documentation of your business activities, time spent, and the nature of your income becomes critical for substantiating your deduction if questioned by the IRS.

Common Mistakes to Avoid

Even with beneficial tax laws, many business owners leave money on the table or run into trouble with the IRS due to common errors:

Misunderstanding the QBI Deduction Limitations

Not all business income qualifies. Guaranteed payments to partners, reasonable compensation to S corporation shareholders, and investment income don't count as qualified business income. Many service businesses—including law, accounting, consulting, and financial services—face additional restrictions if income exceeds the phase-out thresholds.

Failing to Track Basis

For pass-through entity owners, your tax basis limits the losses you can deduct in any given year. Many business owners neglect to track their basis properly, leading to disallowed deductions or incorrect reporting when they eventually sell or close the business.

Overlooking Estimated Tax Requirements

The combination of pass-through income and enhanced deductions creates a complex estimated tax picture. Business owners who don't adjust their quarterly estimated payments appropriately can face underpayment penalties, even if they ultimately owe no tax due to deductions.

Mixing Business and Personal Expenses

The IRS scrutinizes small business deductions closely. Failing to maintain separate bank accounts, inadequate documentation of business purpose, or claiming clearly personal expenses as business deductions invites audits and penalties.

What's on the Horizon: Future Tax Policy Considerations

While the OBBBA provided certainty on many tax provisions, the political and economic landscape continues to evolve. Business owners should stay informed about potential future changes:

Potential Revenue Raisers

With federal deficits remaining high, lawmakers may look for ways to offset the cost of making tax cuts permanent. Potential targets could include:

• Tightening qualification rules for the QBI deduction
• Lowering the phase-out thresholds
• Restricting which business types qualify
• Increasing taxes on higher-income earners

Economic Conditions

Tax policy doesn't exist in a vacuum. Economic conditions—including inflation, interest rates, and overall growth—influence both the practical impact of tax provisions and the political will to maintain or modify them.

State Tax Conformity

Not all states automatically conform to federal tax law changes. Business owners must understand how their state treats federal provisions like the QBI deduction, which can significantly impact overall tax liability.

Keeping Your Financial Records Audit-Ready

With valuable deductions come increased scrutiny. The IRS has signaled increased enforcement efforts, particularly around business deductions and pass-through entity taxation. Making sure your financial records can withstand an audit isn't just about compliance—it's about protecting the tax benefits you've legitimately earned.

Proper bookkeeping forms the foundation of audit defense. Every deduction you claim should be supported by contemporaneous documentation: receipts, invoices, mileage logs, time records, and business purpose notes. The best time to organize these records is when the transaction occurs, not when the IRS comes knocking.

Simplify Your Financial Management

Navigating the complexities of the Tax Cuts and Jobs Act, the One Big Beautiful Bill Act, and the ongoing evolution of tax law requires more than just knowledge—it demands organized, accurate financial records. Whether you're maximizing your QBI deduction, tracking depreciable assets, or documenting qualified business expenses, maintaining clear financial records is essential.

Beancount.io provides plain-text accounting that gives you complete transparency and control over your financial data—no black boxes, no vendor lock-in. With your financial records in a version-controlled, human-readable format, you can track every transaction, understand your tax position in real-time, and ensure you're capturing every deduction you're entitled to. Get started for free and see why developers and finance professionals are switching to plain-text accounting.