100% Bonus Depreciation Is Back: What It Means for NNN

Every few years, Washington hands real estate investors a genuinely meaningful gift. The latest one is big: 100% bonus depreciation is back — and this time it’s permanent. For net lease buyers, that changes the after-tax math on acquisitions in a way most investors haven’t fully absorbed yet. Here’s the plain-English version.

What Changed

Under the 2017 tax law, investors could immediately deduct 100% of the cost of qualifying short-life property in the year it was placed in service. That benefit was phasing out — it had dropped to 40% and was scheduled to hit zero. The One Big Beautiful Bill Act, signed July 4, 2025, reversed course: it permanently reinstates 100% bonus depreciation for qualifying property acquired and placed in service after January 19, 2025. No phase-down, no expiration date. The IRS followed with guidance in early 2026 clarifying how to apply the rules.

“Qualifying property” means assets with a tax recovery period of 20 years or less. The building structure itself (39-year property) doesn’t qualify — but a surprising amount of what you buy with a commercial property does.

Where Cost Segregation Comes In

On paper, a commercial building depreciates over 39 years. In reality, a building is a bundle of components: site improvements, paving, landscaping, signage, specialty lighting, certain fixtures and equipment. A cost segregation study — performed by an engineering firm — identifies and reclassifies those components into 5-, 7-, and 15-year recovery categories. Studies commonly reclassify 20% to 40% of a property’s basis into these shorter-life buckets.

Under the restored rules, everything reclassified into those buckets can be deducted in full, in year one.

Run the illustrative numbers on a $2 million NNN purchase with $1.6 million of building basis. Straight-line depreciation alone produces roughly a $41,000 first-year deduction. If a cost segregation study reclassifies 30% of that basis into short-life property, the first-year deduction jumps to roughly $636,000 — short-life components deducted entirely in year one, plus regular depreciation on the rest. That’s potentially hundreds of thousands of dollars in deductions available immediately rather than dribbled out over four decades.

Which NNN Properties Benefit Most

Properties with heavy site work and equipment shine. Convenience stores and gas stations, car washes, quick-lube and auto service properties, and drive-thru QSRs tend to have a high percentage of short-life assets — fuel systems, wash tunnels, lifts, canopies, extensive paving. Industry reports note that bonus depreciation is already visibly driving transaction activity in the auto service and car wash sectors. Standard retail boxes benefit too, just at a lower reclassification percentage.

It pairs naturally with high-yield assets. A larger first-year deduction can shelter the property’s own income (and, for investors who qualify as real estate professionals, potentially other income — ask your CPA). For yield-focused buyers, the after-tax return on the same cap rate just improved materially.

Three Things to Get Right

Timing. The property must be acquired and placed in service after January 19, 2025, to qualify for the permanent 100% rate. Deals closed in 2023–2024 fall under the old phase-down percentages.

Documentation. The deduction is only as defensible as the cost segregation study behind it. Use a reputable engineering-based firm, not a rule-of-thumb estimate.

Exit planning. Accelerated depreciation is recaptured at sale — which is one more reason 1031 exchanges, which defer that recapture, pair so well with this strategy. Our 1031 exchange team can walk you through how buyers combine the two.

The Bottom Line

Permanent 100% bonus depreciation is the most investor-friendly tax change in years, and it directly improves the math on net lease acquisitions — especially equipment- and site-heavy properties like c-stores, car washes, and auto service. If you’re buying, build cost segregation into your underwriting from day one. If you’re selling one of these property types, your buyer pool just got deeper and more motivated.