The Year-End Equipment Purchase: Section 179, Bonus Depreciation, and the $2,500 Rule

Your laptop fan has been audible on every client call since August, the battery gives you about ninety minutes, and a Black Friday teaser has already landed in your inbox. Somewhere in the back of your head, your bookkeeper is saying that anything bought before December 31 comes off this year's taxes. That is partly true, and the gap between "partly" and "fully" is where founders go wrong in two directions: some buy things the business never needed because a deduction sounded like free money, and others buy exactly the right thing on January 3 and push the write-off into a year when it may be worth less. Here is how the rules work for the 2026 tax year, so you can decide which kind of buyer you want to be.

A Deduction Is a Discount, Not a Refund

Say you spend $4,000 on a standing desk, an ergonomic chair, and a second monitor for your home office. If you are in the 24 percent federal bracket, deducting the full amount lowers your federal income tax by $960 and leaves you $3,040 poorer for the year, before any state effect. Sole proprietors and single-member LLC owners may also shave a little self-employment tax off, because the deduction reduces net profit, while an S-corp owner's deduction passes through to the shareholder's income and leaves payroll tax on the salary untouched. None of this makes the purchase a bad idea; it makes the tax break the garnish rather than the meal. A desk you would have bought in February anyway is worth pulling forward into December, because you collect the deduction a year sooner at no extra cost. A desk you would never have bought is a $4,000 loss with a $960 coupon attached, and no preparer will tell you otherwise. Buy what the business needs, and use the calendar only to choose which tax year it lands in.

Start With the $2,500 Rule

The cheapest tax strategy of the year is checking whether the thing you are buying costs $2,500 or less.

Businesses without audited financial statements can elect the IRS de minimis safe harbor, which lets you deduct a tangible item outright when it costs $2,500 or less per invoice, or per item when the invoice lists them separately. That covers most laptops, monitors, phones, printers, and desk chairs, and it skips depreciation schedules entirely. You make the election by attaching a statement titled "Section 1.263(a)-1(f) de minimis safe harbor election" to your timely filed original return, with your name, address, and taxpayer identification number. It is an annual election, and you do not file Form 3115 for it.

Two conditions catch people. Your books must treat these purchases as expenses under a consistent policy that existed at the start of the year (the IRS does not require that policy to be written down unless you have audited financials), and the election is all-or-nothing, so it applies to every qualifying purchase that year rather than only the ones you pick. Ask your bookkeeper how small equipment is coded right now, because a laptop parked in an asset account and a laptop booked as an office expense are not the same thing on paper.

Above $2,500, Bonus Depreciation Probably Does the Work

Anything over the threshold goes onto a depreciation schedule, where computers are five-year property and office furniture is seven-year property, which means a $5,200 workstation setup would normally be deducted in slices over several years. Two rules let you take it all at once. Bonus depreciation, which the One Big Beautiful Bill Act made permanent at 100 percent for qualified property acquired and placed in service after January 19, 2025, applies automatically unless you elect out. So if you buy that workstation in December and your preparer does nothing special, the full $5,200 is probably deducted in 2026. Section 179 is the older, elective route, and its 2026 limit is $2,560,000, reduced dollar for dollar once you place more than $4,090,000 of property in service, a ceiling no solo founder will ever feel. The differences that matter at your scale are smaller and more practical.

Here is where "buy it before December 31" stops being automatic advice. A deduction is worth the most in a year when your income is high, so if 2026 has been thin while a new retainer client is about to make 2027 your best year, taking the whole write-off now can waste it at a lower bracket than the one you will pay next year. In that case you can elect out of bonus depreciation for that class of property by filing a statement with Form 4562 by the return's due date, extensions included, and then depreciate the workstation over five years or use Section 179 for only part of it. Neither route is wrong. You can make the opt-out call as late as filing time, but you cannot change the purchase date in March, which is why the modeling belongs in November. If your income looks flat from one year to the next, take the default and move on.

The Date That Counts Is "Placed in Service"

The IRS treats property as placed in service when it is ready and available for its specific use, and the tax year does not care when you clicked "order." Its own example is a machine delivered in one year but not installed and running until the next, which counts for the second year. A desk still sitting in a freight terminal on December 31 has not been placed in service for 2026, however early you paid for it, and that matters for both Section 179 and bonus depreciation. Black Friday falls on November 27 this year, which leaves about five weeks of cushion for backorders, shipping delays, and installer appointments, and by mid-December most of that cushion is gone. Keep the order confirmation, the delivery receipt, and a dated note of the day you started using the item, since that paper is what answers the question in an exam.

Business use matters too. Section 179 requires more than 50 percent business use in the year you place the property in service, and you can deduct only the business share of the cost, so a $2,000 tablet used 80 percent for work yields $1,600. If business use drops to 50 percent or less during the asset's recovery period, part of the deduction comes back as ordinary income. Buy a separate device for the business, because a clean paper trail beats a usage log you would have to reconstruct after the fact.

Where This Goes Sideways

Vehicles are their own rulebook, with weight classes, mileage logs, and caps such as the $32,000 Section 179 ceiling for SUVs placed in service in 2026. Do not sign a dealer contract in December for tax reasons until your preparer has run the numbers on that specific vehicle. Equipment you deduct in full also has a tax basis of zero, so selling it later is generally taxed as ordinary income up to the depreciation you claimed. That barely registers on a used laptop and matters a good deal more on a $20,000 camera package, which is a reason to think about how long you will actually keep anything expensive.

A Note for UK Founders

If your business is registered in the UK, the closest equivalent is the Annual Investment Allowance, which lets you deduct the full cost of most plant and machinery from your profits up to £1 million per accounting period, according to GOV.UK. Business cars are excluded and get writing down allowances instead. Your cutoff is the end of your own accounting period, which is not necessarily December 31, so check that date before you order.

Send Your Preparer a Short List Before Thanksgiving

Write to your CPA or enrolled agent with what you plan to buy, roughly what it costs, when you expect it to be in use, and what share will be for the business. They can tell you whether each item sits under the $2,500 line, whether your state follows the federal treatment, and whether this is a year to take the deduction or defer it. Everything above describes US federal rules for 2026 in general terms and is not advice on your particular return, which is exactly why that email is worth sending. Then order the laptop with enough time to plug it in before the year turns.