EcomCPA | Insights for Ecommerce Founders | May 2026
OBBBA brought back 100% bonus depreciation. That part you probably already know. What founders are running into now is the second half of the story: roughly half the states didn’t follow along, and your federal write-off can blow up your state income tax return in ways that nobody mentions when you sign for the new packing line or warehouse racking.
This is the kind of thing that doesn’t get caught until your 2026 state returns hit a desk in March 2027. By then the cash is out the door and you’re holding a surprise state tax bill on equipment you already deducted federally.
Here’s what’s actually happening, and how to plan for it before you sign your next capex order.
The Federal Picture, Briefly
OBBBA, signed in July 2025, restored permanent 100% bonus depreciation for qualified property placed in service after January 19, 2025. For most ecommerce sellers, that means warehouse equipment, conveyor systems, forklifts, computers, software, packing tables, vehicles used 100% for business, and material handling gear all qualify for an immediate write-off on the federal return.
Section 179 expensing is still there too. The 2026 cap sits at $1.16M with a phase-out beginning at $2.9M of purchases. For sellers under that ceiling, Section 179 often does the same job as bonus depreciation.
So far, so good. The federal side is clean.
The States Did Not All Sign On
State income tax conformity is its own animal. A state can choose to follow the federal tax code, follow it with exceptions, or write its own depreciation rules. Many states do the second thing, and bonus depreciation is one of the things they most consistently carve out.
The decoupled list for 2026 includes California, New York, New Jersey, Pennsylvania, Massachusetts, the District of Columbia, Connecticut, Maryland, Tennessee, North Carolina, Indiana, and Wisconsin, among others. The exact list shifts each session and your tax preparer should confirm, but it isn’t a small group.
What “decoupled” looks like on a return: you take the federal write-off, then add it back on the state return. The state lets you depreciate the same asset over its regular MACRS life. So you’re getting the federal deduction in year one and the state deduction spread over five, seven, or fifteen years depending on the asset.
What This Looks Like for a Real Seller
Say you’re a $7M revenue Shopify brand based in California. In late 2025 you bought $480,000 of warehouse and fulfillment equipment to bring fulfillment in-house: pallet racking, conveyor, RF scanners, a sit-stand sorter, and a forklift. All placed in service before year-end.
Federal: $480K bonus depreciation, full deduction. At a 37% marginal rate that saves roughly $178K in federal tax.
California: The state requires the $480K addback. California allows the asset to depreciate over its MACRS life, so in 2026 you get only the first-year MACRS amount, roughly $96K on a 5-year asset. That’s a $384K addback at California’s top 13.3% rate, or about $51K in extra state tax in year one.
The federal benefit doesn’t go away, but your state cash outflow in 2026 just got $51K bigger than your bookkeeper modeled. If you didn’t make a Q1 2026 estimated payment that anticipated the addback, you’re now looking at an underpayment penalty on top of the bill.
Section 179 Doesn’t Save You Either
A lot of sellers reach for Section 179 thinking it sidesteps the conformity issue. It doesn’t, fully. Most states conform to Section 179 but with their own dollar caps. California caps Section 179 at $25,000 with a $200,000 phase-out. New Jersey caps it at $25,000 too. Pennsylvania doesn’t allow Section 179 at all for corporate income tax purposes and uses its own depreciation schedule.
So electing Section 179 for a $480K equipment purchase still produces a six-figure state addback if you’re in California. The federal answer changes, the state answer doesn’t.
Practical Planning Moves for the Rest of 2026
A few things worth doing before you sign on more equipment.
Run the state addback math first. Before any capex purchase over $50K, model the year-one state cash impact in the state where your operating entity files. If you operate across multiple states, do it for each. The federal P&L benefit can look great while the state cash hit is meaningful.
Update your 2026 estimated payments. If you bought equipment in 2025 or are planning a 2026 purchase, recompute Q2, Q3, and Q4 state estimates. The Q2 2026 deadline was June 15. Q3 is September 15. Getting in front of this now avoids the penalty layer.
Reconsider what you place in service and when. If your state runs a high addback rate, a December 2026 purchase costs you the federal benefit in 2026 and the state cash benefit slowly over the asset life. A purchase planned for early 2027 may serve you better if cash is tight, since you defer both the federal and state effects together. This is the opposite of how it usually plays out, where you accelerate at year-end. With heavy bonus depreciation, the year-end rush can actually hurt in decoupled states.
Talk to your bookkeeper about deferred tax accounting. If you’re on accrual books and care about your balance sheet (which you should if you’re raising capital or borrowing), the federal-state timing mismatch creates a deferred tax liability. Most ecommerce books we see don’t carry deferred tax at all. If a lender or buyer ever looks at your financials closely, this will come up.
Watch for entity-level state taxes. PTET regimes in roughly 35 states have their own conformity quirks. Some PTET calculations start from federal taxable income (and so do conform to bonus depreciation), others start from state taxable income (and don’t). If you’ve elected PTET, ask your preparer which side of that line your state sits on. The answer changes your tax bill materially.
What to Watch For Later in 2026
A few items are still in play. Several states are running 2026 sessions where conformity is on the agenda, including Connecticut and Maryland. Some are debating partial conformity or higher Section 179 caps. None of these are decided as of late May 2026.
OBBBA also restored research expensing under Section 174, and that has its own state conformity pattern that doesn’t always match the bonus depreciation pattern. If you also claimed Section 174 expenses or R&D credits, that’s a separate state-by-state review.
The Underlying Point
Federal tax planning is a single-state problem. State tax planning is whatever number of states you have presence in, each with its own rules. Bonus depreciation is one of the cleanest examples of federal optimization that leaves state cash on the table if you don’t model it.
If you’re sitting on a meaningful 2026 capex plan and you operate in any of the decoupled states, this is worth a forty-minute conversation with your CPA before you commit. The federal-state delta is real money, and it’s reasonably easy to model in advance once someone runs the numbers.
