Tax Structure and Bookkeeping for Physical Therapy Practices: S-Corp, QBI, and Accounting Systems

Default PLLC Taxation: When Simplicity Is Correct

A single-member PLLC that has not made any tax elections is taxed as a sole proprietor by default — all practice net income flows to your personal tax return on Schedule C and is subject to both income tax and self-employment tax (15.3% on the first $168,600 of net earnings in 2026, 2.9% on earnings above that). This is the simplest structure and the right choice when your practice net income is below approximately $50,000 per year — the additional cost and complexity of payroll does not yet produce meaningful tax savings. Keep your books current from day one using QuickBooks Self-Employed ($15/month) or Wave (free), track every deductible expense including equipment, software, continuing education, and malpractice insurance, and make quarterly estimated tax payments (April 15, June 15, September 15, January 15) to avoid underpayment penalties.

S-Corporation Election: When to Pull the Trigger

An S-Corporation election (filed via IRS Form 2553) changes how your PLLC is taxed. Instead of all net income being subject to self-employment tax, an S-Corp requires you to pay yourself a 'reasonable salary' (subject to payroll taxes) and take additional profits as distributions (not subject to self-employment tax). For a PT practice generating $150,000 in net profit, a reasonable PT salary might be $90,000 — meaning you pay payroll taxes on $90,000 instead of the full $150,000, saving approximately $9,180 in SE tax annually. The breakeven point for S-Corp election is typically $50,000–$80,000 in net annual profit, where SE tax savings exceed additional accounting and payroll processing costs ($2,000–$5,000/year). Consult a CPA who works with healthcare practices before electing — the reasonable salary determination for PTs is influenced by PT market compensation data (typically $75,000–$120,000/year for a full-time PT in most markets).

The 20% QBI Deduction for PT Practices

The Qualified Business Income (QBI) deduction — Section 199A — allows eligible pass-through business owners (sole proprietors, S-Corp shareholders, partnership members) to deduct up to 20% of qualified business income from their taxable income. Physical therapy is a Specified Service Trade or Business (SSTB) under Section 199A, which means the QBI deduction phases out at higher income levels. For 2026, the phase-out begins at approximately $197,300 for single filers and $394,600 for married filing jointly. Below these thresholds, a PT practice owner can deduct up to 20% of their QBI — a significant tax benefit worth understanding before your practice reaches these income levels. For a PT owner with $150,000 in QBI and a total taxable income below the phase-out, this deduction saves approximately $7,200–$9,900 in federal income tax annually at 24–33% marginal rates. Have your CPA model the QBI impact specifically — it interacts with W-2 wage requirements for S-Corps in ways that affect optimal structure decisions.

Chart of Accounts for PT Practices

Setting up your chart of accounts correctly from day one prevents months of reclassification work at tax time. Key income accounts: Patient Service Revenue — Insurance; Patient Service Revenue — Cash Pay; Late Cancel and No-Show Fees. Key expense accounts: Clinical Supplies; Equipment Purchases Under $2,500 (expensed) and Equipment $2,500+ (capitalize and depreciate); EMR and Software Subscriptions; Malpractice Insurance; Health Insurance Premiums; Continuing Education; Marketing and Advertising; Physician Meals and Entertainment (50% deductible for business meals); Billing Service Fees; Payroll and Payroll Taxes; Office Rent; Utilities. Bonus depreciation (Section 179 and 100% bonus depreciation where applicable) allows you to deduct the full cost of qualifying PT equipment (treatment tables, modalities, exercise equipment) in the year of purchase rather than depreciating it over 5–7 years — significantly reducing your first-year tax liability. Verify current bonus depreciation rules with your CPA as these provisions change annually.

Bookkeeping Software: QuickBooks vs. Xero vs. Practice-Specific Tools

For most PT practices, QuickBooks Online ($30–$90/month depending on tier) is the industry standard bookkeeping software that CPAs know and can easily collaborate on. Xero ($15–$60/month) is a strong alternative with a cleaner interface and better multi-user access. Wave is free for basic bookkeeping and adequate for practices in their first year. PT-specific practice management software (WebPT, Jane App) handles clinical billing but does not replace general bookkeeping — you need both. Connect your bank accounts to QuickBooks with automatic transaction import, categorize transactions weekly (not monthly), and reconcile bank accounts monthly. A bookkeeper who understands healthcare practices costs $200–$600/month and is worth every dollar — the time you spend doing your own books is time not spent with patients.

Finding a CPA Who Understands PT Practices

A general CPA who has never worked with a healthcare practice will cost you more in missed deductions and suboptimal structure than their fee saves you. Look for CPAs who explicitly serve physical therapists, healthcare practices, or medical professionals. Resources: APTA's Practice Finance resources list approved advisors; your state PT association may maintain a referral list; Healthcare Business Advisors and DoctorCPAs are national firms specializing in healthcare provider accounting. Interview at least two CPAs before engaging — ask specifically: 'How many PT practice clients do you currently have? Do you help with S-Corp election analysis? Can you help me benchmark my overhead ratio against PT industry averages?' A healthcare-specialized CPA charges $200–$400/hour but typically saves 5–10x their fee in tax optimization for a growing practice.

Payroll Setup and Employee Benefits

Once you hire your first employee — or yourself as an S-Corp shareholder-employee — payroll compliance becomes mandatory. Use a payroll service rather than managing payroll manually: Gusto ($40–$80/month plus $6–$12 per employee) and ADP Run ($60–$150/month) are the most common choices for small healthcare practices. Payroll services handle federal and state withholding deposits, generate W-2s and 1099s, and file quarterly payroll tax returns (Forms 941 and state equivalents). Failing to deposit payroll taxes on time results in penalties of 2–15% of the deposit amount — a common and costly mistake for new practice owners managing too many tasks simultaneously. Health insurance premiums paid by the practice for employees and the owner-employee are deductible business expenses (with specific rules for S-Corp shareholders — your CPA must handle this correctly).

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