Your Perc Machine Has a Deadline, and So Does Its Write-Off


If you still run perchloroethylene ("perc"), you already know it's being phased out. What the phaseout does to your taxes is less obvious. Replacing the machine, retiring the old one and cleaning up the site are three separate tax decisions. Each one has a right year and a right category, and if you lump them together as a cost of doing business, you can end up deducting too little, too late, or in a way that won't hold up.

The deadline

EPA's 2024 rule (40 CFR §751.605) sets three dates:

- Machines acquired after June 16th, 2025 can't use perc at all.
- Third-generation machines can't use perc after December 20th, 2027.
- All perc dry cleaning and spot cleaning, including fourth- and fifth-generation machines, ends after December 19th, 2034.

In July 2026, EPA extended some worker-protection dates but left these phaseout dates alone. It says it's still reconsidering the rule, and the rule is being challenged in court. Some states have earlier bans, so your preparer checks yours. If you run a third-generation machine, you have about 14 months, and the year you replace it changes your tax result.

Writing off the new machine

A hydrocarbon, wet-clean or other non-perc machine is new equipment, not a repair. You can recover the cost three ways:

- Regular depreciation: Dry cleaning equipment is generally 5-year property (asset class 57.0, Rev. Proc. 87-56).
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- Section 179: For 2026, you can expense up to $2,560,000 of equipment. The limit drops dollar for dollar once your purchases pass $4,090,000. For 2025 the figures are $2,500,000 and $4,000,000 (Rev. Proc. 2025-32). The deduction can't exceed your business income, but anything over that carries forward.
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- Bonus depreciation: OBBBA restored 100% bonus. Property is eligible only if it was acquired after January 19, 2025. Property under a written binding contract signed before January 20, 2025 doesn't qualify. Bonus isn't limited by income, so it can create a loss.

The machine goes on the year's return when it's placed in service, meaning installed and ready to run. A machine delivered December 28 and hooked up January 6 belongs to next year.

Example: you install a $90,000 machine in December 2026, and the shop's other profit is $30,000. Full bonus depreciation creates a $60,000 loss. If you're an S corporation shareholder with low stock basis, you may not be able to use that loss this year. Taking $30,000 under §179 and depreciating the rest spreads the deduction out. Run both before you file.

Many states don't follow federal bonus depreciation, and some cap §179 lower. Your accountant should know yours.

Taking the old machine off the books

- Scrapped or retired: Once the old machine is permanently out of service, its remaining tax basis is generally deductible in the year you got rid of it (Reg. §1.168(i)-8). Being obsolete isn't enough while it's still running. A machine junked in an earlier year needs a prior-year fix from your preparer, not a deduction on this year's return.
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- Sold (or traded in): Since 2018, like-kind exchanges cover only real property, so a trade-in counts as a sale. Gain above the machine's tax basis, up to the depreciation you took, is ordinary income under §1245.

Example: you trade in a fully depreciated perc machine for a $5,000 credit. That $5,000 is ordinary income, and the new machine's basis is its full price before the credit.

Cleanup costs depend on who made the mess

Perc contamination in floors, soil and groundwater is common at older sites, and the tax treatment depends on the property's history:

- Your own contamination: Cleaning up soil and groundwater your business contaminated, back to how it was before you did, is generally deductible (Rev. Rul. 94-38; Reg. §1.263(a)-3(j)(3), Example 2).
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- Contamination that was there when you bought the property: That cleanup is a betterment and gets capitalized (Reg. §1.263(a)-3(j)(3), Example 1). Capitalized cleanup of land generally goes into land basis, which isn't depreciated.
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- Treatment systems: Wells, pumps and vapor-mitigation systems are capital assets that you depreciate, even when the cleanup itself is deductible (Rev. Rul. 94-38).
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- Estimates: You can't deduct a reserve for future cleanup. The deduction generally waits until the work is done (§461(h)).
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- Reimbursements: Money from insurance, a prior owner or a state cleanup fund reduces the deduction. Your preparer checks whether your state has a fund.

The old §198 election to expense environmental cleanup expired for costs paid or incurred after December 31th, 2011. If someone cites it, they're working from an old return.

If you rent, read your lease before you assume the deduction is yours. It generally belongs to whoever bears the cost under the lease, and your preparer checks the terms.

What to do

1. Find your machine's generation and purchase date. That sets your deadline, and it costs nothing.
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2. Check your asset list against the floor. Machines you got rid of this year get their remaining basis written off on this year's return. For older ones, ask your preparer how to fix the prior years. Either way, document the disposal date and how you got rid of it.
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3. Pull every environmental invoice and site report. Separate testing, soil work and monitoring from treatment equipment, and note whether the contamination came before you owned the site.
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4. Model the replacement year. Compare placing the new machine in service in 2026 and in 2027 under §179, bonus and regular depreciation, using projected income for each year. Then confirm how your state treats it.
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5. Keep the paperwork for the old machine. Save the hauler's or buyer's receipt and any trade-in credit. Without them, the remaining-basis deduction is hard to support.

The tradeoff

Writing off the new machine now leaves fewer deductions for later years and makes any future sale of it taxable as ordinary-income recapture, up to the depreciation taken. Expensing cleanup is right only when the facts support it, and capitalizing cleanup that qualified for a deduction leaves money stuck in land basis for years. Getting the year and the category right takes a projection and paperwork, not a guess in April.

If you're facing a machine replacement, have cleanup costs on the books, or haven't checked your depreciation schedule against what's actually in the plant, book a 30-minute Tax Leak Review before year-end: https://cal.com/mister-moneysleeves/tax-leak-review​

Tristan D. Taylor, EA

Tristan D. Taylor, EA

Tax strategy for small-business owners, creators and individual taxpayers. Clear, practical updates from an enrolled agent so you don't overpay the IRS.

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