Cash vs. Accrual Accounting: Which Is Right for Your Medical Practice?

Every medical practice picks an accounting method, and once picked, it shapes every financial statement the practice will produce until it is changed. Most practices default to cash. Some are required to use accrual. Others should use accrual by choice and never do. The decision is not academic. It affects the practice’s tax bill, its ability to read what is really happening in the business, and its readiness for a sale or a bank loan.

This piece walks through how each method works in a medical practice, when the IRS requires accrual under Section 448, why some practices should adopt accrual even when cash is allowed, and what changing methods actually looks like on Form 3115. The choice is more consequential than most physician-owners realize.

How Cash Accounting Works in a Medical Practice

Cash accounting recognizes revenue when the practice receives the money and expenses when the practice pays them. A visit performed in December but paid in February is February revenue. A supply invoice received in December but paid in January is January expense.

The appeal is simplicity. The books match the bank statement. Tax planning is straightforward: pushing income into next year or accelerating an expense into this year is a matter of timing checks. For most small and mid-sized medical practices operating as S corporations or partnerships, cash is both the default and the sensible choice.

The downside is that cash accounting hides the timing of what the practice has actually earned versus what it has collected. In a practice where insurance reimbursement lags service by 30 to 60 days, the December P&L can look weaker than the practice’s real performance, and January can look stronger than what actually happened that month.

How Accrual Accounting Changes What You See

Accrual accounting recognizes revenue when it is earned (when the service is performed) and expenses when they are incurred (when the obligation exists), regardless of when cash changes hands. That December visit is December revenue whether it is paid in December, January, or February.

An accrual P&L matches revenue to the effort that produced it. A practice with rising DSO looks different under accrual than under cash: the revenue shows up when the service happens, and the growing gap between service and collection lands on the balance sheet as receivables rather than distorting monthly profitability.

When the IRS Requires Accrual (Section 448 and the Gross Receipts Test)

Section 448 of the Internal Revenue Code restricts the use of cash accounting for certain entities above a gross receipts threshold. The threshold is indexed annually and applies on a three-year average of gross receipts. Confirm the current threshold with your CPA before making the assumption that a small-practice election is still available; the number moves.

Two structural points matter. First, personal service corporations (PSCs) are treated differently under §448 than other C corporations. Second, most S corporations and partnerships used by physician-owned practices are not subject to the same limits and can generally use cash regardless of size, as long as they do not carry inventory in the tax sense. The interaction of entity type, gross receipts, and inventory is where the analysis lives, and it should be run for the practice’s specific structure.

The Financial Reporting Case for Accrual, Even If Not Required

A practice can be required to file its tax return on cash and still keep its management books on accrual. In fact, many well-run practices do exactly that: cash for tax purposes, accrual for internal financial management.

Three situations make accrual worth the effort even when cash is allowed:

• The practice is preparing for sale in the next 24 to 36 months, and buyers will want to see accrual financials
• The practice is applying for or maintaining bank financing; lenders read accrual statements more easily than cash
• The physician-owner wants monthly financials that reflect actual practice performance, not just cash timing

Changing Methods: Form 3115 and What to Expect

Changing accounting methods is not a matter of switching a setting in QuickBooks. It requires filing Form 3115 (Application for Change in Accounting Method) with the IRS, calculating a Section 481(a) adjustment that captures the cumulative income effect of the change, and typically spreading that adjustment over four years.

The mechanics are manageable but not casual. A method change made in the wrong year, or without the correct 481(a) computation, can create a tax problem larger than the reporting benefit. Practices contemplating a switch, particularly those preparing for a sale or crossing a receipts threshold, should model the tax impact before filing.

Cooper Norman’s healthcare accounting team reviews method elections for practices across Idaho and Utah, runs the §448 test on current-year facts, and models the switch on Form 3115 when accrual is the right move. This overview is general information, not tax advice for your specific practice. Talk with a Cooper Norman advisor before making the change.