A working capital true-up is a post-closing adjustment that reconciles the estimated working capital delivered at closing against the actual working capital calculated afterward, and it can move real dollars in either direction months after a dental practice sale is signed, funded, and celebrated. Most buy/sell content stops at purchase price and never explains this mechanic, which is exactly why sellers are routinely surprised by it. Working capital in a dental practice is negotiated in the letter of intent, mechanized in the purchase agreement, and settled after closing through a statement, a review window, and a payment. Dental practices complicate the standard M’s and A’s working-capital playbook because patient accounts receivable behaves nothing like receivables in most small businesses: insurance claims in flight, PPO write-downs, and patient balances all collect at different rates and on different timelines, and that single fact drives most of the disputes covered below. This is general information, not legal or accounting advice; deal terms vary enormously by transaction and should be reviewed with a healthcare M&A attorney and CPA. As of September 2026.
What a Working Capital True-Up Actually Is
Every dental practice sale price is built on an assumption: that the buyer receives a practice with enough operating cash cushion to run it from day one without an emergency capital injection. That cushion is working capital, current assets minus current liabilities, and the purchase agreement sets a target amount for it, called the peg. Because nobody can calculate the practice’s exact working capital on the morning of closing, the parties use an estimated working capital figure to close the deal, then reconcile it against the actual working capital once the post-closing books are final. The difference between estimate and actual is the true-up, and it is settled as a dollar-for-dollar payment from whichever party benefited from the gap.
This is not a minor bookkeeping formality. A dental practice with $180,000 in insurance claims pending and a supplies closet that was quietly run down in the final month before closing can produce a true-up large enough to change what the seller actually nets from the deal. After the seller has already spent the money and stopped paying attention to the transaction. That is the core problem this guide addresses: the true-up happens after the seller’s attention has moved on, which is precisely when sellers lose money they thought they had already banked.
What “Working Capital” Means in a Dental Practice
Working capital is a generic accounting concept, but its components behave differently inside a dental practice than inside most small businesses being bought and sold. The table below is the reference DPI uses across this cluster for what typically sits inside the working capital calculation, how each component behaves specifically in a dental setting, and where it tends to generate disagreement.
| Component | Included? | Dental-Specific Treatment | Dispute Risk |
|---|---|---|---|
| Patient AR, insurance claims in flight | Usually, subject to a collectability discount | Ages differently by payer; some claims are denied, delayed, or partially paid months later | High |
| Patient AR, patient balances | Usually, net of an allowance | Collectability drops sharply past 90 days; payment-plan balances are often treated separately | High |
| Supplies & materials inventory | Yes | Consumables (impression material, anesthetic, PPE) vs. capital-adjacent items are valued differently; easy to under-stock right before closing | Medium |
| Prepaid expenses | Yes | Malpractice/liability insurance premiums, software licenses, and membership dues paid in advance | Low |
| Accounts payable (trade) | Yes, reduces working capital | Supply vendor invoices and lab fees outstanding at closing | Low |
| Accrued payroll & payroll taxes | Yes, reduces working capital | Wages earned but unpaid as of the closing date, including hygienist and associate compensation | Medium |
| Accrued PTO / vacation liability | Yes, reduces working capital | Unused vacation and sick time the buyer inherits as an obligation to retained staff | Medium |
| Cash & cash equivalents | Usually excluded (deal-specific) | Most dental asset deals leave cash with the seller and exclude it from the peg entirely | Low |
| Deferred / unearned revenue (ortho contracts, in-progress treatment plans) | Sometimes, deal-specific | Multi-visit case fees collected before treatment is complete; orthodontic contracts are the classic example | Medium |
Table reflects general dental-practice deal structuring conventions as of September 2026; every transaction defines these terms in its own purchase agreement, and the definitions in that document control, not the general convention.
Setting the Peg: Why the Reference Period Choice Matters
The target working capital number, the peg, is typically set by averaging the practice’s actual working capital over a trailing period, often the trailing twelve months, sometimes a shorter window. In most industries that trailing average smooths out noise. In a dental practice it can bake in a structural distortion, because dental production and collections are seasonal in ways that move AR and cash meaningfully during the year.
Two seasonal patterns matter most. First, the year-end benefit-max rush: patients with insurance benefits that reset annually accelerate treatment in the fourth quarter to use benefits before they expire, which spikes production, spikes insurance AR, and often spikes supplies usage all at once. Second, the January deductible reset: patients delay elective treatment in the new year while deductibles reset, production often softens, and AR composition shifts toward older claims as the Q4 surge works through the payer pipeline. A trailing-twelve-month average that happens to end in November looks structurally different from one ending in February, even for an identical practice with identical patient volume. Whichever reference period the LOI locks in, it deserves scrutiny from both sides. The seller wants a period that doesn’t understate a legitimately higher operating cushion, and the buyer wants a period that doesn’t inherit an artificially inflated AR balance from a benefit-max rush that is about to collect slower than usual.
The Mechanic: From LOI to Settlement
The working capital adjustment moves through four stages across the life of a deal, and confusing which stage you’re in is a common source of seller surprise.
- The LOI sets the peg. The letter of intent establishes the target working capital amount (or the methodology for calculating it) and the reference period it’s drawn from. This is the seller’s best leverage point to negotiate a fair reference period, before deal momentum makes it harder to revisit.
- Estimated working capital funds the closing. Because final books aren’t ready on closing day, the parties agree on an estimate, often prepared by the seller or the seller’s accountant and reviewed by the buyer, and the purchase price is adjusted at closing based on that estimate against the peg.
- The post-closing statement is prepared and reviewed. Within a period defined in the purchase agreement (commonly somewhere in the 60-120 day range, though this varies by deal), one party, almost always the buyer, since the buyer now controls the books, prepares a final working capital statement. Who prepares the statement matters enormously: the party that isn’t preparing it only sees the calculation after it’s already built, which is why the review window and access-to-records provisions in the purchase agreement matter as much as the peg itself.
- The seller reviews and can dispute. The seller (or seller’s accountant) gets a defined window to review the buyer’s statement and raise objections to specific line items before the numbers become final.
- Settlement. If actual working capital exceeds the peg, the buyer typically owes the seller the excess. If actual working capital falls short of the peg, the seller owes the buyer the shortfall. Either direction is normal, and a true-up in either direction is the mechanism working as designed rather than a sign that someone erred.
Where Disputes Actually Arise
Working capital disputes in dental deals cluster around a small number of recurring fault lines, almost all of them tied to definitions that sounded settled in the purchase agreement until real numbers were plugged in.
GAAP vs. “consistent with historical practice.” This is the single biggest source of disagreement, and it causes more fights than any dollar-amount disagreement on its own. Purchase agreements typically require the post-closing statement to be prepared either under GAAP or “in a manner consistent with the target’s historical accounting practices,” and these two standards can produce meaningfully different numbers for the same practice. A practice that has never formally applied GAAP’s bad-debt reserve methodology to patient AR, for instance, might see its receivables valued very differently under a strict GAAP recalculation than under its own historical (and looser) approach. Whichever standard the purchase agreement names, both sides should confirm they understand which one actually governs the specific line items most likely to move, especially AR collectability.
AR collectability assumptions. Insurance claims and patient balances are only worth what actually gets collected, and the purchase agreement has to specify a treatment for uncollected AR: excluded from the working capital calculation entirely, guaranteed by the seller up to some percentage, or assigned to the buyer to collect on the seller’s behalf with a true-up if collections fall short of assumption. Each approach shifts collection risk to a different party, and the assumption embedded in the peg (what collection rate was assumed when the target was set) is exactly what gets re-litigated when actual collections come in lower.
Supplies valuation. Inventory counts and per-unit valuation methods can differ enough between the seller’s informal tracking and the buyer’s post-closing count to matter, particularly for higher-cost consumables and implant components.
PTO accrual treatment. Whether PTO is valued at current wage rates or at the rate in effect when it was earned, and whether it includes payroll tax burden on top of the wage liability, is a frequent line-item argument that’s cheap to settle upfront and expensive to argue about after closing.
Even when GAAP or historical-practice is named clearly in the agreement, applying it still requires judgment calls, bad-debt reserve percentages, useful-life assumptions on supplies, that reasonable accountants can disagree on. That’s why most purchase agreements name an independent-accountant resolution mechanism for unresolved disputes, separate from litigation.
Asset vs. Stock Deals: Why the AR Question Changes Entirely
Whether working capital, and specifically accounts receivable, is even part of the deal depends heavily on deal structure, covered in depth in DPI’s asset vs. stock purchase guide. In a typical dental asset sale, the seller frequently retains accounts receivable entirely: the seller keeps the right to collect on services rendered before closing, and the buyer starts with a clean AR ledger reflecting only post-closing production. That structure eliminates most AR collectability disputes from the working capital calculation because AR simply isn’t in it, but it doesn’t eliminate the underlying complexity, it just moves it into a separate transition-services or billing-agency arrangement covering who collects legacy claims and how those collections get remitted to the seller.
In a stock sale, the buyer acquires the practice entity itself, including its existing receivables and payables, which means AR collectability lands squarely inside the working capital true-up by default. This is one of several reasons stock sales carry different risk allocation than asset sales, and why the deal-structure decision should be made with working capital consequences already in view, not treated as a separate conversation that happens after the LOI is signed.
What Sellers Should Do Before Closing
- Clean up aging AR now, not during due diligence. Work down patient balances and follow up on stalled insurance claims well before the reference period used to set the peg, so the number the peg is built on reflects real collectability.
- Resist the temptation to starve supplies inventory. Deferring a routine supply order to shrink working capital right before closing is a pattern buyers’ advisors specifically look for, because it’s one of the easier ways to inflate the estimated working capital number without touching AR. It’s also easy to catch by comparing order history against the closing-date count.
- Don’t slow-walk payables to the same end. Delaying vendor payments past normal terms right before closing understates accounts payable and overstates working capital, another pattern that shows up clearly against historical payment timing.
- Document PTO liabilities precisely. Have an exact, dated accrual by employee ready before the buyer’s team calculates its own number from payroll records; disagreements are easier to prevent than to resolve.
- Understand the reference period before signing the LOI. Once it’s locked in, renegotiating it after finding out it disadvantages you is a much harder conversation than getting it right the first time.
What Buyers Should Verify in Diligence
- AR aging in detail, not just a total. Break the balance down by payer, by claim age, and by patient-vs-insurance portion, and compare recent collection rates against what the peg assumes.
- Supply order history against typical usage. Look for any unusual dip in ordering in the months before closing relative to the practice’s normal pattern.
- Payables aging against historical terms. Confirm vendor and lab invoices are being paid on the practice’s normal schedule, not artificially held.
- PTO and payroll accrual completeness. Verify the accrual reflects every employee being retained and uses current wage rates plus payroll tax burden.
- Who prepares the post-closing statement, and the dispute mechanism. Confirm the purchase agreement names a specific independent-accountant resolution process, a specific review-window length, and specific access rights to underlying records during that window, not just a broad promise to “cooperate.”
Worked Example: A True-Up in Both Directions
Illustrative DPI editorial model, not a benchmark. All figures below are round, hypothetical numbers chosen only to demonstrate the true-up mechanic on a mid-size single-location general practice. A real transaction’s peg, components, and outcome depend entirely on that deal’s specific purchase agreement and should never be assumed from this example.
Scenario A. Buyer owes seller. The LOI sets a working capital peg of $150,000 based on a trailing-twelve-month average. At closing, estimated working capital comes in at $150,000 and the price is unadjusted. Ninety days later, the post-closing statement shows actual working capital of $168,000: insurance claims collected faster than the trailing average assumed, and the seller had genuinely kept supplies and payables at normal levels. The buyer owes the seller the $18,000 excess.
| Component | At Peg | Actual (Post-Closing) |
|---|---|---|
| Patient AR (net of allowance) | $95,000 | $108,000 |
| Supplies inventory | $22,000 | $23,000 |
| Prepaid expenses | $8,000 | $8,000 |
| Less: Accounts payable | ($40,000) | ($37,000) |
| Less: Accrued payroll & PTO | ($35,000) | ($34,000) |
| Net Working Capital | $150,000 | $168,000 |
Scenario B. Seller owes buyer. Same $150,000 peg. This time the post-closing statement shows actual working capital of only $121,000: a stretch of denied insurance claims came in lower than expected, and payables had crept above the peg period’s level. The seller owes the buyer the $29,000 shortfall, paid out of the seller’s already-received proceeds.
| Component | At Peg | Actual (Post-Closing) |
|---|---|---|
| Patient AR (net of allowance) | $95,000 | $74,000 |
| Supplies inventory | $22,000 | $21,000 |
| Prepaid expenses | $8,000 | $8,000 |
| Less: Accounts payable | ($40,000) | ($47,000) |
| Less: Accrued payroll & PTO | ($35,000) | ($35,000) |
| Net Working Capital | $150,000 | $121,000 |
The mechanic is identical in both directions, only the sign of the check changes. That’s why the peg, the reference period, and the AR collectability assumption matter more than any single number in the deal: they determine which scenario a given seller is more likely to land in, long before anyone can see the actual figure.
Where This Fits in a Dental Practice Sale
Working capital is easy to treat as a footnote next to purchase price, valuation multiples, and financing terms, but it’s one of the few deal mechanics that pays out after the transaction is otherwise finished. It belongs in the same diligence conversation as the practice valuation, the acquisition checklist, and the deal-structure decision in the asset-vs-stock analysis, not as an afterthought once those bigger questions are settled. DPI’s glossary defines the working capital adjustment in a single paragraph; this guide is the full mechanic behind that definition, for anyone about to negotiate one. For the broader transaction process this fits into, see DPI’s buying and selling a dental practice hub.
Frequently Asked Questions
What is a working capital true-up in a dental practice sale?
It’s a post-closing reconciliation between the estimated working capital used to fund the closing and the actual working capital calculated once final books are available, settled as a payment from whichever party benefited from the difference.
Who prepares the post-closing working capital statement?
Almost always the buyer, since the buyer controls the practice’s books after closing. The seller then has a defined review window, specified in the purchase agreement, to examine the statement and raise disputes over specific line items.
Is accounts receivable included in a dental practice’s working capital peg?
It depends on deal structure. In many asset sales the seller retains AR entirely, removing it from the working capital calculation. In stock sales, and in some asset sales that specifically include AR, it’s typically included net of a collectability allowance.
What’s the difference between GAAP and “consistent with historical practice” in a working capital dispute?
GAAP applies a formal, standardized accounting methodology to items like AR collectability reserves. “Consistent with historical practice” instead requires the post-closing statement to follow however the seller’s practice actually accounted for those items historically, which may be looser than GAAP. The two standards can produce different numbers for the same underlying facts, and which one governs is set by the purchase agreement’s specific language.
What happens if the buyer and seller disagree on the true-up amount?
Most dental practice purchase agreements name a specific dispute-resolution mechanism, commonly an independent accounting firm engaged to resolve only the disputed line items, with its determination binding on both parties. This is faster and cheaper than litigation and is standard practice in the industry.
Can a seller avoid a working capital true-up altogether?
Some smaller deals use a fixed, non-adjusting purchase price with no working capital mechanism at all, but this is uncommon once a practice reaches a size where working capital swings could be material. Most mid-size and larger dental practice sales include some form of true-up because both parties want protection against the working capital position changing meaningfully between LOI and closing.
