Year-End Dental Equipment: The Deduction Is Not the Payback
Before a year-end dental equipment purchase, write one line: the collections and avoided costs it adds each month against its running costs, with the tax saving set to zero. A screen to run before you call your CPA.
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The Problem
In the fourth quarter, an equipment quote arrives with an expiry date on it and the pitch writes itself: spend now, deduct now, pay less tax. The logic is not wrong, it is just incomplete. A usable deduction can reduce the after-tax cost of a purchase; its timing and its value depend on the practice's own circumstances. What it does not do is change the work the equipment lets the practice do.
Those two things get collapsed into one in a lot of year-end conversations, and the gap between them is where the money goes. The payment is monthly, in real money, for years. If a piece of equipment does not earn its payment out of the work it actually lets the practice do, the deduction has only made the shortfall smaller.
What follows is a screen to run before the adviser conversation, not a verdict on any purchase. This page is business and practice-management commentary. It is not tax advice, it is not a recommendation to buy or not to buy, and it is not a view on any practice's return.
The Playbook
The goal is to put a cash estimate on paper first, so the tax conversation with a qualified adviser starts from the practice's own numbers rather than from a quote's expiry date.
- Write the benefit line. On the left, what this equipment adds each month: collections the practice is not getting today — procedures currently turned away, referred out, or done slower, at a monthly volume the practice would defend out loud — plus the costs it would stop paying, such as work currently sent out that would be kept in house. Use the practice's own numbers, not a vendor's model.
- Write the incremental cost line. On the right, the monthly payment plus every running cost that arrives with it: service, consumables, lab, and any additional assistant time or chair time the procedure needs that the practice is not paying for today. Incremental operating costs belong on this side, not in a footnote.
- Separate the one-time set-up money. Installation, the training days, and the slow first weeks go in their own box underneath, not into the monthly figure. One-time money folded into a monthly line distorts the estimate in both directions.
- Subtract, with the tax saving set to zero. The result is a preliminary cash-flow estimate built on the practice's own assumptions, and some of those assumptions will move. It is not proof that a purchase pays for itself and it does not settle the decision — it is the page worth putting in front of the practice's own CPA, because it is the only one in the conversation about this practice.
- Clear the ceiling question, then take three questions to the CPA. The IRS publishes an annual limit on how much a taxpayer may elect to expense, and for taxable years beginning in 2026 it runs into the millions of dollars; whether that ceiling is the binding constraint for a given purchase is a quick question for a CPA. A dentist-facing CPA firm notes that the Section 179 deduction cannot be used to reduce practice taxable income below zero, while bonus depreciation can create a loss and has no limit on the amount of investment in capital assets — which applies to a given purchase, entity, and year is for the practice's own CPA. The same firm reports that full expensing was restored and made permanent; permanent does not remove tax-year timing questions, so ask whether timing matters at all for this purchase. Then: will this be in service by year end? The IRS test is written around property placed in service, which is not the same as property ordered or property paid for. And: does my state follow the federal rule here? This page does not answer that — it is not a detail to meet for the first time in April.
One more question worth writing down before the call: if the tax saving were zero, what would the practice say about this purchase? Whatever the answer, it is the thing to open the adviser conversation with.
Download the Equipment Payback Worksheet
The episode's one-page worksheet gives each quote a block for the collections added and costs avoided each month, the monthly payment and incremental running costs, a separate one-time set-up box, the gap between the two sides, the in-service date, and the questions to take to a CPA. It is staged with this episode and is not represented here as a live email-delivery offer until the approved publication and capture path are active.
Grab the tool from this episode: it downloads the instant you submit and lands in your inbox too. Just your email — no account, nothing to unsubscribe from unless you opt in below.
Sources & Data
- Internal Revenue Service, Revenue Procedure 2025-32 (sections 1, 2.10, and 4.24). (opens in new tab)Sets inflation-adjusted items for 2026 for Code provisions as in effect on October 9, 2025, and notes that amendments enacted after that date may affect whether the adjustments remain applicable. Section 4.24 states that for taxable years beginning in 2026, under section 179(b)(1), the aggregate cost of section 179 property a taxpayer elects to treat as an expense cannot exceed $2,560,000, reduced (but not below zero) by the amount by which the cost of section 179 property placed in service during the 2026 taxable year exceeds $4,090,000. Section 2.10 states that the OBBBA amendments to section 179 apply to property placed in service in taxable years beginning after December 31, 2024. Re-read October 18, 2026.
- PKF O'Connor Davies, "What OBBBA Means for Dentists," by David J. Goodman, CPA (January 6, 2026). (opens in new tab)States that OBBBA restored 100% expensing and made this method permanent; that the Section 179 deduction cannot be used to reduce practice taxable income below zero; and that bonus depreciation can create a loss and has no limit on the amount of investment in capital assets. Re-read October 18, 2026.
This page relies on those two sources. It does not state a December 31 in-service deadline, because the sources above establish the "placed in service" test rather than a calendar rule for any particular purchase, and it does not state how any state treats these provisions. It also makes no claim about how often any particular constraint binds for independent practices, or about how many quotes typically fail a cash screen — no source was found for either. Informational only — this is business and practice-management commentary, not tax advice, and not clinical, legal, payer-contract, billing, or compliance advice. Nothing here recommends buying or not buying equipment. Whether a purchase qualifies, when it is placed in service, how a state treats it, and what any of it means for a particular return depend on the facts and on the practice's own qualified tax adviser.
Transcript
This is the full narration script the episode audio was produced from. Theme music is not transcribed.
This is Drill & Bill, the fast dental-owner brief. Today: year-end equipment buying, and why a deduction is not a payback.
It is October. Somewhere in your inbox is a quote with an expiry date, and somebody on the phone said the words buy before December. The pitch is tidy: spend now, deduct now, pay less tax.
Start with one line on paper. On one side, what this equipment adds each month: collections you are not getting today, plus costs you would stop paying. On the other, what it adds in running costs. Run that line with the tax saving set to zero. It will not tell you what to do. It will tell you what you are really arguing about.
A usable deduction can reduce the after-tax cost of a purchase. Its timing and its value depend on your circumstances. What it does not do is change the work the equipment lets you do — the part carrying the payment. If a scanner does not earn that payment out of the chair time it fills or frees, no deduction has fixed it. It has only made the shortfall smaller.
This is business and practice-management commentary, not tax advice, and nothing here is a view on your return.
Write the line honestly, because the easy version flatters every quote. On the left: the collections you expect this to add each month, at a volume you would defend out loud, plus the costs you would stop paying — work you send out today and would keep in house.
On the right: the monthly payment and every running cost that arrives with it. Service. Consumables. Lab. Any extra assistant time or chair time the procedure needs that you are not paying for now. Those get left out, and they decide the close calls.
Set-up money goes in its own box underneath: installation, the training days, the first weeks while the team is slow. It is real, but it is one-time, and folding it into a monthly figure distorts the line in both directions.
Then subtract. What you have is a preliminary estimate of monthly cash, built on your own assumptions — and still the only page in the room about your practice.
Owners get stuck on the ceilings, so let's move those aside. The Internal Revenue Service publishes an annual limit on how much a taxpayer may elect to expense, and for twenty twenty-six it runs into the millions of dollars. Whether it is the constraint that matters here is a quick question, and your C-P-A has the answer.
A C-P-A firm writing for dentists this year made two points worth keeping. The Section one seventy-nine deduction cannot be used to reduce practice taxable income below zero. Bonus depreciation, the other route, can create a loss, and has no limit on the amount of investment in capital assets. Which fits your purchase, your entity and your year is the question your own C-P-A answers.
The same firm notes that full expensing was restored and made permanent. Permanent is a useful word, but it does not remove tax-year timing questions. So ask first whether timing matters at all here, rather than taking that answer from whoever wrote the expiry date.
Second: will this be in service by year end? The test the Internal Revenue Service writes around is property placed in service, which is not the same as property ordered, or property paid for. What that means for your install is your C-P-A's call.
Third: does my state follow the federal rule here? I am not going to tell you what your state does, because I would be guessing. It is not a detail you want to meet for the first time in April.
Before you sign anything, take every piece of equipment anyone has pitched you this year and run that line on each. Flag any quote whose assumptions you cannot defend: a collections figure from a vendor's model, a running cost nobody priced, a set-up week nobody scheduled.
Here is the Monday-morning question: if the tax saving were zero, what would you say about this purchase? Write it down and open the conversation with it. An adviser can work with an owner who knows what the equipment is meant to earn.
The Equipment Payback Worksheet sits with this episode — open the episode page at drill and bill dot com and it is waiting there. One page per quote: collections added, costs avoided, running costs, the set-up box, the gap, and your C-P-A questions.
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