Cash basis accounting is the method for dental practices. Not a starter method you outgrow at some collections number, and not one of two defensible options you weigh against each other — the method. Money in, money out, recorded when it moves. Accrual accounting is still worth understanding, because sooner or later a buyer, a lender, or a broker will look at your practice through an accrual lens, and you should know what they are doing and why. But that is their analysis, run on their side of a transaction. It is not a reason to change how your practice keeps its books.
What cash basis and accrual actually measure
Under cash basis accounting, revenue is recorded when payment is received and expenses are recorded when they are paid. Under accrual accounting, revenue is recorded when it is earned — when you complete the procedure — and expenses are recorded when they are incurred, when the bill arrives, regardless of when cash changes hands. A practice that completes $80,000 of procedures in December but doesn’t collect from insurance until January shows $0 of December revenue on a cash basis and $80,000 on an accrual basis.
That gap is real, and it is the entire basis of the pitch for putting dental practices on accrual books. What the pitch leaves out is what accrual costs you. Accrual puts income on your tax return before the money reaches your account: you would owe tax on that $80,000 in the December it was produced, not in the January you were paid. And the $80,000 itself is a guess. Production booked at full fee gets written down to contracted rates, denied, downgraded, or paid at whatever percentage the carrier lands on eight weeks later. Cash basis has one advantage that no management-reporting argument outweighs — it records what actually arrived.
Why cash basis is the right method for a dental practice
Three reasons, and none of them are about practice size. First, your tax bill tracks your bank account. You are never taxed on an insurance claim that is still sitting in a carrier’s queue, and you are never taxed on production that gets written down after the fact. Second, it gives you real year-end control: paying December supply and lab invoices, funding deductible expenses, and timing owner compensation all land where you put them, because the deduction follows the payment. Third, it is simple enough that you can read your own P&L without an accounting background — which matters more than it sounds, because a report you don’t trust is a report you don’t use.
There is a fourth reason that gets missed. The strongest argument people make for accrual — that you need to see production in the month it happened — is already solved, and not by your general ledger. Your practice management software reports production, adjustments, net collections, and A/R aging by carrier, every month, without touching your accounting method. You can watch a strong December and a lagging January in the same report your front office already runs. Restructuring your books and your tax return to duplicate a report you already have is a bad trade.
The IRS threshold that permits cash basis — and why it is not a ceiling you grow into
The Tax Cuts and Jobs Act set the gross receipts threshold under Section 448(c) at $25 million, indexed for inflation, for tax years beginning after December 31, 2017. Indexing has moved it since: it was $30 million for 2024, and for 2026 it is $32 million per IRS Revenue Procedure 2025-32. Below that three-year average, cash basis is permitted — which is every independent dental practice in the country.
Read that threshold correctly. It is permission, not a recommendation, and it is not a line you are working your way toward. A practice would need a three-year average above $32 million in receipts before eligibility is even a question, and that is not a number independent dental practices reach. Two related points are worth knowing: Section 448 only restricts C corporations, partnerships that have a C corporation partner, and tax shelters in the first place, so a practice organized as an S corporation or a sole proprietorship is not caught by it at all; and the same gross receipts test is what keeps small businesses out of the inventory and capitalization rules under Sections 471 and 263A.
What a buyer, a lender, or a broker does with your numbers
Buyers, lenders and brokers price a practice on earnings independent of collection timing, so during diligence they normalize whatever you hand them into an accrual-equivalent view on their own side. That is their model, built with their assumptions, and it is a routine part of how a deal gets underwritten. It asks nothing of you: no change of accounting method, no restated books, no accrual financials. You hand over clean cash basis records, and the normalization is their exercise, not yours.
What matters on your side is that those records are genuinely clean: A/R aged by carrier and current, payables entered when the invoice arrives rather than when the check clears, lab and supply costs coded to the right month, owner and family expenses separated from practice expenses. That is what keeps diligence short, and switching to accrual would never have fixed a set of books that isn’t. If a sale or transition is anywhere on your horizon, our free dental practice valuation calculator is a sensible place to get oriented before you are in the middle of one.
What cash basis gives you at tax time
Cash basis produces simpler tax compliance because you only pay tax on money you have actually received. There is no year-end adjustment for uncollected insurance claims and no reconciliation between what your books say you earned and what your bank says you collected. Year-end planning is also genuinely controllable: paying deductible expenses before December 31 — supplies, insurance premiums, certain service contracts — puts those deductions on the current year’s return, and you decide the timing.
That control is worth more in a practice than it looks on paper, because it is one of the few levers that stays in your hands all the way to December 31. It works alongside the rest of the picture — where your owner compensation is set, what goes into the retirement plan and when, how the quarterly estimates were built, whether an equipment purchase belongs in this year or next. Those decisions are only as good as the coordination behind them, which is why we run bookkeeping, tax and financial planning under one roof rather than leaving you to carry the numbers between offices.
What actually changing methods would cost you
Suppose you did it anyway. Changing from cash to accrual is not a software setting. It requires filing Form 3115 (Application for Change in Accounting Method), and the IRS grants automatic consent for the most common changes under Revenue Procedure 2015-13 — but the mechanics of the Section 481(a) adjustment, the cumulative catch-up for income and deductions that were never picked up under the old method, are where the real cost sits.
Run the numbers on a practice with $200,000 of outstanding insurance receivables. Switching to accrual means recognizing that $200,000 as income in the year of change. An unfavorable Section 481(a) adjustment is spread over four years, so you would be paying tax on roughly $50,000 a year of revenue you already collected under the old method — for four years — in exchange for a reporting view your practice management software already gives you and a buyer would build on their own side anyway. That is the whole trade, and it is not close.
The short version
Your practice runs on cash basis. It runs on cash basis at $400,000 of collections and it runs on cash basis at $4 million, because the reasons are structural rather than a function of size. Accrual is a lens other people use to look at your practice during a transaction. That is their exercise, on their side of the table, and it changes nothing about how your books are kept.
The honest boundary: this is about the accounting method your practice keeps its books and files its return on. It is not a claim that accrual concepts never matter to you. Accrual thinking is how you should read a purchase offer, how a lender is modeling your debt service, and how you evaluate whether an associate is actually profitable in the month they produce. Understanding accrual is useful. Filing on it is not.
The method question is settled. What is not automatic is whether your cash basis books are clean enough to run the practice from and to hand a buyer or lender on short notice — that is a function of how the bookkeeping for dentists is actually done month to month. At Core Advisors, that bookkeeping sits in the same room as your tax services for dentists and your personal financial plan, so the year-end timing decisions, the entity and compensation questions, and the numbers you would put in front of a lender all come from one team working off one set of books. If you want a look at whether yours are transaction-ready, start there.
This article is educational and general in nature. It is not tax, legal, accounting, or investment advice, and it does not create a client relationship. Tax thresholds and IRS procedures change, and how any of this applies depends on your entity structure, your state, and your specific facts. Talk with a qualified advisor before acting.
