2025 Section 199A deduction strategies matter more than ever for business owners this year. The Section 199A qualified business income (QBI) deduction is still one of the most powerful tax breaks available to owners of pass-through businesses. Thanks to the One Big Beautiful Bill Act (OBBBA), the 20% QBI deduction is now permanent instead of expiring after 2025 — but the amount you actually get still depends heavily on your taxable income, wages, and the kind of business you run.
In simple terms, if you have $120,000 of defined QBI and $120,000 of taxable income, you can qualify for a $24,000 Section 199A deduction on your Form 1040 without lifting a finger. But once your income climbs above the 2025 thresholds, the rules get more complicated and your deduction can shrink or disappear if you’re not paying attention.
For 2025, OBBBA keeps the same basic structure of Section 199A but layers it on top of the new inflation-adjusted thresholds. Above those levels, your deduction can be limited based on three things:
For taxable years beginning in 2025, the key Section 199A taxable income thresholds are:
Between those thresholds and the upper end of the phase-in range ($247,300 single / $494,600 MFJ), your deduction may be partially limited. Above the phase-in ceiling, owners of specified service businesses can lose the deduction entirely if they don’t take action before year-end.
If your 2025 taxable income is in or above this zone, the “do-nothing” 20% deduction may not be enough. This is where targeted planning — especially at year-end — can give you back a sizeable Section 199A deduction you would otherwise lose.
Capital gains don’t just create a tax bill — they also push up your taxable income, which can push you into or further into the Section 199A phase-out range. If you have embedded losses in your portfolio, deliberately realizing (harvesting) those capital losses can pull your taxable income back under the threshold and restore part or all of your deduction.
Maria is single. She has:
At $235,000 of taxable income, Maria is above the 2025 single-filer threshold and in the phase-out range for an SSTB. Her Section 199A deduction drops to $13,104 instead of the full $24,000 she’d get at lower income.
Before year-end, Maria harvests $50,000 of capital losses from her portfolio. Her net capital gain falls from $90,000 to $40,000, and her taxable income drops to:
$235,000 – $50,000 = $185,000
Now she’s below the Section 199A threshold. Because of that single move, her QBI deduction jumps to the full $24,000.
That one decision creates a combined federal benefit of roughly $9,860 — a mix of lower capital gains tax and the bigger Section 199A deduction — without changing a dollar of her actual business activity.
If you have capital gains pushing you into the phase-out zone, this is a classic end-of-year move worth modeling before December 31.
Charitable contributions are one of the most flexible levers you can pull late in the year, especially under OBBBA, which preserved and expanded several itemized deduction opportunities. When you give to charity and itemize, you’re reducing taxable income — and that same reduction can improve your Section 199A deduction.
Two practical year-end moves:
Instead of harvesting losses, Maria decides to donate appreciated stock with a fair market value of $50,000 and a built-in long-term capital gain of $42,000.
The $50,000 charitable contribution increases her itemized deductions by $50,000 and lowers taxable income by the same amount. Her taxable income drops from $235,000 to $185,000 — again moving her below the Section 199A threshold and restoring her full $24,000 deduction.
The federal tax impact for Maria looks like this:
If you’re already considering larger charitable gifts, structuring them this way can multiply the benefit — both for the cause you care about and your own tax position.
For a deeper dive into how OBBBA reshaped charitable giving and deduction strategies, take a look at our OBBBA charitable giving tax strategy guide .
OBBBA brought back and made permanent 100% bonus depreciation for most qualifying property placed in service after January 19, 2025, and also expanded Section 179 expensing. That means many assets you buy and place in service before December 31, 2025, can be fully written off in the first year.
This can help your Section 199A deduction in two different ways:
David is single and runs his medical practice through an S corporation. For 2025, he has:
Because David’s taxable income is above the upper end of the 2025 phase-out range for a single SSTB owner, his Section 199A deduction is $0.
Before year-end, David decides to move forward with $70,000 of medical equipment he was planning to buy in the next year or two. He places it in service in 2025 and fully expenses it using bonus depreciation or Section 179.
That $70,000 write-off:
After the purchase, David’s 199A deduction jumps from $0 to about $27,840. At a 32% marginal rate, that adds around $8,908 in additional tax savings — on top of the regular deduction from expensing the equipment.
If you’re considering major equipment, technology, or build-out projects, this is exactly the kind of scenario we want to model under OBBBA. For more on using 100% bonus depreciation with cost segregation, see OBBBA Bonus Depreciation: Write Off 30% of Your Building .
If your 2025 taxable income is at or above the Section 199A thresholds, you’re in the zone where planning can make the difference between:
The three core levers to look at before December 31 are:
None of these moves should be made in a vacuum. Section 199A interacts with your overall tax picture, other OBBBA provisions, and your long-term goals. The same move that helps your QBI deduction could create issues somewhere else if it’s not coordinated.
Ready to see how much 199A you’re leaving on the table?
These 2025 Section 199A deduction strategies are especially important for business owners who want to protect their profits and avoid losing part of their QBI deduction.
Schedule a Free Tax Strategy Session with our team, and we’ll walk through your 2025 numbers, model these scenarios with you, and help you decide which mix of moves makes the most sense for your business.
For official IRS guidance on how the Qualified Business Income deduction works, you can review the IRS Qualified Business Income Deduction page .