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Where Cash-Pay Practices Leave Money on the Table

Direct primary care, concierge medicine, med spas, functional medicine — the cash-pay model fixes a lot of what's broken in healthcare economics. But most cash-pay owners still file taxes like ordinary small businesses, and it costs them real money, quietly, every year. Here are the five places we see it most.

Cash-pay practices are unusual businesses: recurring membership revenue, no insurance receivables, high owner involvement, and — for successful ones — owner income high enough that ordinary small-business tax advice stops fitting. Most of the money left on the table isn't from missed receipts. It's from decisions that were never made because nobody raised them before the filing deadline: entity elections, income timing, plan design, depreciation strategy.

None of what follows is exotic. All of it is standard tax law, applied with the practice's actual numbers in front of you, before year-end instead of after.

1. The S-corp election nobody brought up

The direct answer: many profitable cash-pay practices operating as default LLCs or sole proprietorships pay self-employment tax on every dollar of profit — an S-corp election can legally remove a meaningful slice of that.

Self-employment tax runs 15.3% on earnings up to the Social Security wage base, then continues at Medicare rates above it. A default single-member LLC owner pays it on all practice profit. With an S-corp election, the owner takes a reasonable salary (which is subject to payroll tax) and the remaining profit as distributions (which are not).

The two words doing the heavy lifting are reasonable salary. The IRS expects S-corp owner compensation to reflect what the work is actually worth — for a practicing physician-owner, that's a substantial number, and setting it too low is the fastest way to turn a planning strategy into an audit problem. The election is a math problem specific to your profit level, your state, and your retirement plan design — not a blanket recommendation. But it's a math problem worth actually doing, ideally before the practice's profit makes the missed years expensive — the kind of math a Tax Advisory conversation is built to run.

2. The QBI deduction, managed by accident

The direct answer: medicine is a "specified service" business under Section 199A, which means the 20% qualified business income deduction phases out as the owner's taxable income rises — and for owners near the phaseout range, year-end planning can be the difference between claiming it and losing it entirely.

The QBI deduction — made permanent by 2025's tax legislation — allows pass-through owners to deduct up to 20% of qualified business income. But healthcare is an SSTB (specified service trade or business), so the deduction shrinks and then disappears across an income phaseout range (for 2026, roughly $403,500–$553,500 for married filing jointly — figures adjust annually for inflation; verify the current thresholds before relying on them).

Here's what makes this a planning opportunity rather than trivia: taxable income is the trigger, and taxable income is movable. Retirement plan contributions, deduction timing, and compensation structure can pull an owner back below or further into the phaseout range.

A generalist preparer sees your taxable income in March, when it's history. This deduction is decided in November and December — one more reason cash-pay medical ownership calls for planning built around its own economics, not generic small-business advice.

3. Depreciation treated as an afterthought

The direct answer: 100% bonus depreciation is back permanently for qualifying property, which means practice buildouts and equipment purchases can often be deducted fully in year one — if the purchase is classified, timed, and documented deliberately.

This matters most for the equipment-heavy end of cash-pay medicine. A med spa's laser platform, an IV clinic's buildout, a DPC office renovation — these are significant capital outlays, and the difference between depreciating them over decades versus deducting them in year one is a real cash-flow event. Current law restored full first-year bonus depreciation for qualifying property (confirm the treatment for your specific property class and acquisition date), and Section 179 expensing remains available alongside it.

The money gets left on the table in two ways: purchases timed without tax consequences in mind (a December-versus-January decision can move the deduction a full year), and buildout costs lumped into categories that depreciate slowly when a proper cost breakdown would have accelerated a large share of them. For owners doing significant real estate buildouts, this is where a formal cost segregation study — performed by a specialist engineering firm, then applied correctly to your books and return — earns its fee.

4. Annual memberships, recognized wrong

The direct answer: prepaid annual membership revenue is not automatically income the day it hits your account — depending on your accounting method, some of it may belong to next year, and recognizing it early means paying tax before you have to.

This is the most cash-pay-specific item on the list. Practices that collect annual memberships up front — common in DPC and concierge models — often book the full payment as current income because that's what the bank deposit looks like. Under the right accounting method, a portion of that revenue is properly deferred to the year you'll actually deliver the care. Paying tax a year early on revenue you haven't earned yet is an interest-free loan to the government, renewed annually, invisibly.

Beyond the tax timing, membership revenue recognized wrong also quietly breaks your management numbers: month-to-month revenue looks lumpy when it's actually smooth, and growth decisions get made on distorted figures. Clean recognition — the kind our Bookkeeping process handles by default — fixes both problems at once.

5. A retirement plan sized for a smaller business

The direct answer: high-income practice owners frequently stop at a basic IRA or an under-designed 401(k), when their income level supports plan designs with dramatically higher deductible contribution limits.

A successful cash-pay owner's income often supports far more than the default retirement setup: a properly designed solo or group 401(k), and at higher and more stable income levels, defined-benefit-style plans that can support six-figure annual deductible contributions. Plan design interacts with almost everything above — it moves taxable income (see item 2), it depends on entity and compensation structure (see item 1), and it has to fit the practice's real cash flow.

The pattern we see: the plan was set up when the practice was small, and nobody revisited it as income tripled. The contribution gap between the plan you have and the plan your income supports is deductible money, every year it goes unexamined.

Why this happens — and what to do about it

None of these five items requires aggressive positions or gray areas. They require someone looking at your numbers before the year ends, who already understands how a membership-model practice works. Most practices get neither: their preparer sees the finished year in the spring and works with what already happened. A Partner Review happens before the year closes, not after.

If you run a cash-pay practice and haven't had a proactive planning conversation in the last twelve months, the honest question isn't whether you're leaving money on the table — it's how much, and in which of these five places.

This article is general information, not individualized tax advice. Figures reflect law current as of the last-reviewed date and are subject to change; thresholds adjust annually for inflation. Talk to a CPA about your specific situation before acting on anything here.

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