Cash vs. Accrual Accounting for a Med Spa: Why Packages Make the Choice for You

Most med spa owners meet this question when a lender, a buyer or a new bookkeeper asks whether the books are cash or accrual, and realize they are not sure. In most service businesses the answer barely matters. In a med spa it decides whether your P&L is readable at all, because the business collects money before the treatment (packages, memberships, gift cards), buys its most expensive supply before it is used (neurotoxin and filler by the vial), and pays its providers after the month closes. Cash-basis books will show a wonderful December and a dreadful January every year, and neither month will be true.

It is really two questions. One is how you keep the books each month, which decides whether your margins mean anything. The other is which method your tax return uses, which decides when the IRS taxes a package sold in December. The answers do not have to match, and for most practices they should not.

Two separate questions: your books and your return

Under the cash method you record income when the money arrives and expenses when they are paid. IRS Publication 538 puts it plainly: you report income in the tax year you receive it and deduct expenses in the year you pay them, and income is constructively received when it is credited to your account or made available without restriction. A patient who prepays a six-session laser hair removal package on December 28 has given you December income, even though she will not sit in the chair until February.

Under the accrual method you record income when you earn it and expenses when you incur them. The package payment is a liability, deferred revenue, until each session is delivered; the vials in the refrigerator are inventory until they are injected; the commission on this month's treatments is this month's cost whether payroll runs on the 5th or the 20th. Accrual is what generally accepted accounting principles require and what any lender or buyer will restate your numbers to.

The bookkeeping basis and the tax method are chosen separately. A practice can keep accrual books in QuickBooks Online and file on the cash method through a year-end reconciliation, and that is the setup we recommend for almost every aesthetics practice. The method that matters to the IRS is the one used on the return, not the toggle at the top of a QuickBooks report.

Why cash-basis books lie in a med spa

Four features of the business break cash accounting, and every practice has at least three of them.

Prepaid packages, memberships and gift cards. A Black Friday promotion that sells $60,000 of packages is $60,000 of cash-basis revenue in November, with no cost attached, because the injectables and the provider hours arrive over the next six months. Every month after that shows treatments delivered with no revenue beside them. The packages, memberships and gift cards guide covers the mechanics; the summary is that money collected for treatments not yet delivered is a debt to the patient, and the only way the P&L shows the real month is a deferred revenue rollforward tied to the POS outstanding-balance report.

Injectable inventory. Practices buy neurotoxin and filler in bulk to hit supplier volume tiers, often with a large year-end order. On a cash basis the whole order is a December expense and January's treatments carry no product cost, so injectable gross margin swings from 20% to 90% month to month with nothing changing in the treatment room. Accrual books hold the vials as inventory and release cost as units are dispensed, which is the only way to see whether a $12-per-unit price is covering a $6 cost. Our injectables and retail inventory guide explains the count and valuation.

Provider commissions. Injectors are typically paid base plus a percentage of the services they delivered, calculated after month-end and paid in the following month. Cash-basis books put December's commission in January, so the month that generated the revenue looks more profitable than it was, and the slow month after a promotion absorbs the cost of the busy one.

Merchant settlement and sales tax. Card sales settle a day or two after the ticket, net of processing fees, and the last days of each month land in the next month's bank statement. Retail sales tax collected sits in the deposit. Cash books built from the bank feed understate revenue, hide the fees, and treat the tax as income. None of this makes cash-basis reporting wrong for the tax return. It makes it useless for running the practice.

Worked example: a Phoenix practice's fourth quarter under both methods (illustrative)

Take an illustrative single-location practice in Phoenix, Arizona, with $1.6 million of annual revenue, three employed injectors on base plus commission, a membership program and a retail skincare wall. In the fourth quarter of 2026 it collects $520,000: $330,000 for treatments paid at the visit, $150,000 of package, membership and gift card sales driven by a November promotion, and $40,000 of retail. Treatments redeemed from packages sold in this and earlier quarters total $95,000. The practice buys $120,000 of injectables in the quarter, including a $45,000 December stocking order, and dispenses $90,000 of product at cost. Providers earn $70,000 of commission on fourth-quarter treatments, of which $62,000 is paid by December 31. The annual professional liability and general liability premium of $12,000 is paid in December, and other operating costs of $230,000 are the same under either method.

Same practice, same ninety days, and a $24,000 gap. The cash figure says the bank account grew by about $96,000 before owner draws and loan payments. The accrual figure says the practice earned a 15.5% net margin on the treatments it delivered, after carrying $55,000 of new obligations to patients and $30,000 of product into the new year. An owner who takes a $90,000 distribution in January on the strength of the cash number has spent money that belongs to patients who have not been treated yet, which is the mechanism behind a med spa that shows profit but has no cash. In the first quarter the picture reverses: redemptions exceed new package sales, the December vials are dispensed with no purchase beside them, and the cash-basis P&L reports a weak quarter that was in fact fine.

What the IRS lets a med spa do in 2026

The tax rules sort by entity. Under Section 448, C corporations, partnerships with a C corporation partner, and tax shelters may not use the cash method unless they meet the gross receipts test. Sole proprietors, single-member LLCs, S corporations and partnerships without a C corporation partner are not on that list, so the typical owner-injector LLC or S corporation may file on the cash method regardless of size, provided it is not a tax shelter.

For a practice that is a C corporation, or an MSO structure where the professional entity or the management company is taxed as one, the test is average annual gross receipts for the three prior tax years. For tax years beginning in 2026 the limit is $32,000,000 under section 4.30 of Rev. Proc. 2025-32. Entities under common control are aggregated, so an MSO and its professional entity share one limit. Section 448 also exempts a qualified personal service corporation, one whose activities are substantially all in a field such as health and whose stock is substantially all held by the employees performing those services, which a physician-owned professional corporation may satisfy; whether a particular aesthetics entity qualifies is a facts question for your CPA.

Advance payments and the one-year deferral

The tax rule that matters most to a med spa is the treatment of advance payments. Publication 538 states the default: an advance payment for goods or services is income in the year received. A cash-method practice stops there; the December package promotion is December income, and the estimated tax payment due in January has to account for it. An accrual-method practice may elect the deferral method of Section 451(c) and Regulation 1.451-8: the payment is included in income in the year received to the extent it is earned (or recognized in an applicable financial statement, if the practice has one), and the remaining portion is included in the next tax year, whether or not the treatments have been delivered by then. Publication 538 is explicit that nothing may be postponed beyond that following year, and that eligible gift card sales count as advance payments.

The deferral is real but limited: one year, then everything. It helps a growing practice because some portion of each year's package sales is always pushed into the next year, and it is a method of accounting, adopted on the return and changed only with IRS consent on Form 3115. It does not turn package money into cash you can spend; the obligation to the patient does not care which year the IRS taxed it.

Injectables under each method

Inventory is where the cash method surprises owners. Even a cash-method practice does not deduct a $45,000 December stocking order when the supplier is paid. Under the small business taxpayer rules in Treasury Decision 9942, a practice that meets the $32 million gross receipts test may treat inventory as non-incidental materials and supplies, recovering the cost in the year the product is used or provided to the patient or the year it is paid for, whichever is later, or may follow the inventory method in its own books and records. Either way the year-end order is a deduction as it is injected, not as it is bought, and the practice is exempt from the uniform capitalization rules that would otherwise load overhead into inventory cost. The count your accountant insists on in December is therefore a tax document as much as a bookkeeping one.

How we keep med spa books: accrual in QuickBooks, a tax-method reconciliation at year-end

Our default for every practice is accrual books with the POS as the subledger. Each month the deferred revenue rollforward ties to the POS outstanding balances, inventory is counted and cost of goods sold released by units dispensed, commissions are accrued from the production report and reversed when payroll runs, merchant fees are recorded gross, sales tax collected sits in a liability, and prepaid insurance and software are amortized. That produces the P&L by service line described in our guide to reading a med spa P&L.

At year-end the return is prepared from a book-to-tax reconciliation rather than by flipping a report. For a cash-method S corporation or LLC that means backing out deferred revenue (the full package balance is taxable when collected), backing out accrued commissions and payables (deductible when paid), reversing the prepaid insurance entry, and applying the Section 471(c) treatment to inventory. For an accrual-method entity it means applying the Section 451(c) deferral schedule and the accrual rules for compensation. The differences land on Schedule M-1 of the 1120-S or 1065, and the owner sees both numbers: what the practice earned, and what it is taxed on. A practice that wants to change its tax method files Form 3115; a small business taxpayer moving to the overall cash method uses the automatic procedure with no user fee, attaching the form to a timely filed return, and a negative Section 481(a) catch-up adjustment is deducted in the year of change while a positive one is spread over four years. Do not change methods by changing how the bookkeeper enters transactions.

What usually goes wrong

The most common file we clean up is neither method: package sales are posted as revenue when collected (cash) while supplier bills are entered when received (accrual), so revenue and cost sit on different bases and the margin by service line is meaningless. Close behind is the QuickBooks user who believes the cash/accrual toggle on the P&L changes the accounting method; it changes the display, and if deferred revenue was never recorded, both views are wrong. On the tax side we see cash-method filers claiming the Section 451(c) deferral, which is available only to accrual-method taxpayers; year-end injectable orders deducted in full as purchased; December promotions run without setting aside the January estimated payment; MSO and professional-entity receipts counted separately against the gross receipts test; and books flipped from accrual to cash at year-end with no Form 3115, which is an unauthorized change in method. Pick a basis for management reports and keep it, too; a cash-basis November beside an accrual-basis December says nothing about whether the promotion worked.

When to get help

If your P&L shows package sales as revenue, injectables as an expense when bought, or commissions a month late, your books are on the wrong basis for a med spa no matter what the tax return says, and the fix is a monthly close built on the POS. Our med spa bookkeeping and monthly close service keeps accrual books with the deferred revenue rollforward, inventory and commission accrual every month, and our med spa tax planning and preparation work prepares the return from the reconciliation, including the method election and any Form 3115.

The method question deserves an hour with a CPA when you open, when you add packages or a membership program, before a large year-end injectable order, and before any financing or sale. Request a 20-minute fit call and bring last year's return and a current P&L; we can usually tell you which basis your books are on, which method your return uses, and whether the two have ever been reconciled, before the call ends.

Jenny Gao, CPA, EA

Founder of Balance Partners, a CPA-led accounting, tax and fractional CFO practice for med spas. Florida-licensed CPA and IRS Enrolled Agent with more than 13 years of accounting and tax experience. Jenny writes and reviews every guide on this site. About Jenny

This guide is general educational information for owners of med spas and aesthetics practices in the United States and is not accounting, tax, legal, medical, payroll or financial advice for your situation. Rules change and vary by entity, state and facts. Balance Partners, LLC does not provide audit, review, compilation or other attest services. Last reviewed November 8, 2026.