New Tax Law Doubles Small Business Write-Offs — Claim Them Now
The Biggest Small Business Tax Break in a Decade Is Here — Are You Claiming It?
The One Big Beautiful Bill Act (OBBBA) just doubled the Section 179 deduction to $2.56 million and permanently restored 100% bonus depreciation — yet H&R Block reports that nearly 40% of small business owners don't know these changes exist. Signed into law on July 4, 2025, the OBBBA represents the most significant overhaul of small business tax benefits since the original Tax Cuts and Jobs Act in 2017. And with the April 15 filing deadline just weeks away, the clock is ticking.
Whether you're an LLC, S-Corp, sole proprietor, or partnership, these changes could put tens of thousands of dollars back in your pocket — but only if you know what to claim. The businesses that act on these new deductions now will have a massive cash advantage over those that don't.
What Changed: The 5 Deductions Every Small Business Owner Needs to Know
The OBBBA didn't just extend existing tax breaks — it expanded them significantly. Here's a side-by-side comparison of what changed:
| Deduction | Before OBBBA (2024) | After OBBBA (2026) | Your Benefit |
|---|---|---|---|
| Section 179 Expensing | $1.25M limit | $2.56M limit | Deduct 2x more equipment costs in year one |
| Bonus Depreciation | 60% (phasing down) | 100% (permanent) | Write off entire cost of assets immediately |
| QBI Deduction | 20% of qualified income | 23% of qualified income | 15% bigger deduction on pass-through income |
| SALT Deduction Cap | $10,000 | $40,000 | Deduct 4x more state/local taxes |
| R&D Expenses | Amortized over 5 years | Immediately deductible | Full deduction in year one, not spread over five |
Let's unpack each one and show exactly how it affects your bottom line.
1. Section 179: Doubled to $2.56 Million
The Section 179 deduction lets you write off the full purchase price of qualifying equipment and software in the year you buy it, rather than depreciating it over several years. The OBBBA more than doubled this limit from $1.25 million to approximately $2.56 million for 2026, with the phase-out threshold rising to $4.09 million.
What qualifies: Office equipment, computers, software, vehicles (with limits), machinery, furniture, and certain building improvements.
Real-world example: You buy $200,000 worth of new equipment for your shop. Under the old rules, you might have depreciated that over 5-7 years, deducting roughly $28,000-$40,000 per year. Under the new Section 179 limit, you deduct the full $200,000 in year one — an immediate tax savings of $50,000-$74,000 depending on your bracket.
2. 100% Bonus Depreciation: Permanently Restored
This is the change that has CPAs most excited. Bonus depreciation had been phasing down — it dropped to 80% in 2023, 60% in 2024, and was headed to 40% in 2025. The OBBBA permanently restored it to 100% for qualifying property placed in service after January 19, 2025.
Unlike Section 179, bonus depreciation has no dollar cap. If you purchased a $5 million piece of equipment, you can deduct the entire amount in the year it was placed in service. This is especially powerful for businesses that exceed the Section 179 limits.
The combination of Section 179 and 100% bonus depreciation means virtually any business asset purchase can be fully deducted in year one.
3. QBI Deduction: Raised to 23% and Made Permanent
If you operate as a sole proprietor, LLC, S-Corp, or partnership, you benefit from the Qualified Business Income deduction. The OBBBA raised it from 20% to 23% and made it permanent — meaning it's no longer set to expire.
What this means in dollars: On $300,000 of qualified business income, your deduction increases from $60,000 to $69,000. At a 32% marginal tax rate, that's an extra $2,880 in your pocket every year — permanently.
The bill also introduced a minimum deduction of $400 for anyone with at least $1,000 of QBI from a business in which they materially participate, ensuring even the smallest businesses benefit.
4. SALT Cap: Quadrupled to $40,000
The state and local tax (SALT) deduction cap has been a pain point since 2017, when it was capped at $10,000. The OBBBA quadruples it to $40,000 for 2026, with annual inflation adjustments through 2029.
This is particularly valuable if you operate in a high-tax state like California, New York, New Jersey, or Illinois. If you've been hitting the $10,000 cap, you could see an additional $30,000 in deductions this year.
5. R&D Expenses: Immediately Deductible Again
Starting in 2022, businesses were required to amortize domestic research and development costs over five years instead of deducting them immediately. The OBBBA reverses this, restoring immediate deductibility for R&D expenses.
If your business invests in product development, software development, or process improvement, this change means your tax deduction matches your actual cash outflow — no more waiting five years to fully recover your investment.
How to Maximize These Deductions Before April 15
The filing deadline is approaching fast. Here's your action plan:
Audit Your 2025 Asset Purchases
Go through every equipment purchase, software subscription, vehicle acquisition, and building improvement from 2025. Many of these may now qualify for full first-year deduction under the restored bonus depreciation rules. Don't leave money on the table by using outdated depreciation schedules.
Recalculate Your QBI Deduction
If your tax preparer calculated your QBI at 20%, it needs to be updated to 23%. This applies to all pass-through entities — sole proprietors, LLCs, S-Corps, and partnerships. The difference adds up quickly: on $500,000 of qualified business income, the new rate saves you an additional $4,800 in taxes.
Plan Ahead for 2026 Purchases
The permanent nature of 100% bonus depreciation means you can time major purchases strategically. If you've been delaying equipment upgrades or technology investments, 2026 is the year to pull the trigger — you'll get the full deduction immediately.
Review Your SALT Situation
If you've been itemizing but hitting the old $10,000 SALT cap, rework your numbers with the new $40,000 limit. For some business owners in high-tax states, this alone could save $5,000-$10,000 in federal taxes.
Why Most Small Businesses Still Miss These Deductions
Here's the uncomfortable truth: the tax code rewards businesses with sophisticated financial tracking, and penalizes those without it. You can't claim a Section 179 deduction on an asset you didn't properly categorize. You can't maximize your QBI deduction without accurate income calculations. And you certainly can't make strategic purchasing decisions without real-time visibility into your cash flow.
This is where most small businesses fall short. They're running their books in spreadsheets, reconciling once a month (or once a quarter), and relying on a CPA they see once a year to catch everything. That worked when the tax code was simpler. With changes this significant, you need financial visibility that matches the complexity.
Profit Leap's CFO bot connects directly to QuickBooks, Xero, and Stripe to give you real-time financial intelligence — the kind that catches these deduction opportunities automatically. Think of it as an AI CFO available 24/7 via chat, tracking your asset purchases, categorizing expenses, and flagging tax-saving moves before your filing deadline passes. And for the complex questions — like whether your specific business structure maximizes the QBI deduction — there's a CPA backstop to handle the nuances.
At a fraction of the cost of a human CFO, it's the difference between claiming every dollar you're owed and leaving thousands on the table.
The Bottom Line: Don't Leave Money on the Table
The OBBBA represents the largest expansion of small business tax benefits in nearly a decade. Between the doubled Section 179 limit, permanent 100% bonus depreciation, increased QBI deduction, quadrupled SALT cap, and restored R&D expensing, the average small business could save $10,000-$50,000 or more — depending on their size, structure, and investments.
But these deductions don't claim themselves. You need accurate books, proper asset categorization, and proactive financial planning. The April 15 deadline doesn't care whether you knew about these changes or not.
The businesses that thrive under the new tax law will be the ones with real-time cash flow forecasting and proactive financial guidance — not the ones scrambling to catch up after the deadline passes.
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