As an optometry practice owner, you may have heard that electing to be taxed as an S corporation can reduce your taxes. You may even have been told that every successful practice owner should make the election.
The reality is more nuanced.
An S corporation can provide meaningful tax advantages for the right practice. However, it also creates payroll requirements, additional tax filings, recordkeeping responsibilities, and rules governing how the owner is paid. Whether it makes sense depends less on the practice’s revenue and more on its profitability, the owner’s role, and the amount of income remaining after paying the owner a reasonable salary.
Before making the election, practice owners should understand both the potential savings and the added responsibilities.
What Is an S Corporation?
An S corporation is a federal tax classification. It is not a new type of business entity.
A corporation—or an eligible limited liability company—can elect to be taxed as an S corporation by filing Form 2553 with the IRS. To qualify, the business must meet several requirements, including being a domestic corporation, having no more than 100 shareholders, having only allowable shareholders, and having only one class of stock. All shareholders must consent to the election.
S corporations generally do not pay federal income tax at the corporate level. Instead, the practice’s income, losses, deductions, and credits pass through to the shareholders and are reported on their owner’s individual tax returns.
This pass-through treatment is one reason S corporations are popular among privately owned healthcare practices.
Why Do Optometry Practice Owners Consider an S Corporation?
The primary potential advantage is the way an owner’s compensation can be divided between wages and shareholder distributions and the related self-employment tax savings.
An optometrist who works in an S corporation is generally both a shareholder and an employee. The practice pays the owner a W-2 salary for the work the owner performs. That salary is subject to applicable payroll taxes.
If the practice earns more than the owner’s reasonable compensation and its other expenses, some of the remaining profit may be paid to the owner as a shareholder distribution. Non-wage distributions are not subject to employment taxes, although the underlying pass-through income remains subject to federal and potentially state income taxes.
Consider a simplified example:
An optometry practice earns $250,000 before paying its owner. After evaluating the owner’s clinical duties, administrative responsibilities, experience, location, and other relevant factors, the practice pays the owner a $160,000 salary.
The remaining $90,000 is treated as pass-through business income and distributed to the owner rather than being paid entirely as wages.
The potential savings come from the difference in employment-tax treatment. The remaining income does not become tax-free.
This example is intentionally simplified. Actual results depend on payroll-tax limits, deductions, retirement contributions, state taxes, the owner’s other income, and several additional factors.
The Reasonable Compensation Rule Is Critical
Practice owners cannot simply choose an artificially low salary and take the rest of the practice’s earnings as distributions.
The IRS requires an S corporation to pay a shareholder-employee reasonable compensation for the services that person provides. The IRS can reclassify distributions as wages when it determines that an owner was underpaid. The reclassified amount may then be subject to payroll taxes, penalties, and interest.
This issue is especially important for optometry practice owners.
In many practices, the owner personally generates a substantial share of the revenue by examining patients, prescribing treatment, performing medical eye care, and overseeing the clinical team. The owner may also manage employees, evaluate equipment purchases, review financial performance, and make strategic decisions.
The IRS indicates that revenue generated by a shareholder’s personal services generally supports wage treatment. Revenue generated through non-owner employees, equipment, and invested capital may provide greater support for non-wage distributions.
That does not mean every dollar an owner produces must be paid as salary. It does mean that an owner-doctor who generates most of the practice’s revenue usually needs a defensible salary that reflects both clinical and managerial responsibilities.
A reasonable-compensation analysis may consider:
- The owner’s duties and responsibilities
- Hours worked in the practice
- Clinical production
- Management and administrative work
- Experience and training
- Compensation paid to comparable optometrists
- Local employment-market conditions
- The amount of revenue generated by associates, staff, equipment, and other practice assets
The practice should document how the salary was determined rather than selecting a number based only on the desired tax savings.
Other Potential Benefits of an S Corporation
Pass-Through Taxation
Because income generally passes through to the shareholders, an S corporation can avoid the traditional double taxation that may occur when a C corporation pays corporate income tax and then distributes taxable dividends to its owners.
A More Structured Owner-Pay System
Operating as an S corporation requires the owner to distinguish among salary, distributions, expense reimbursements, and personal withdrawals.
Although this creates more work, it can also encourage better financial habits. Owners may gain a clearer understanding of what they earn as practicing optometrists versus what they earn from owning a profitable business.
Potential Tax Planning Flexibility
An S corporation may create opportunities to coordinate owner compensation with retirement planning, health insurance, estimated taxes, equipment purchases, and other business decisions.
However, these areas are closely connected. Changing the owner’s salary can affect payroll taxes, retirement-plan contributions, the qualified business income deduction, and personal cash flow.
The decision should therefore be modeled as a complete tax strategy—not treated as a single tax-saving tactic.
What Are the Drawbacks?
Additional Payroll and Filing Requirements
An owner-employee must generally be placed on payroll. The practice may need to:
- Calculate and deposit payroll taxes
- File quarterly and annual payroll returns
- Issue a W-2
- Maintain payroll records
- File a separate Form 1120-S tax return
- Provide Schedule K-1 information to each shareholder
- Track owner distributions and shareholder basis
For a calendar-year business, Form 1120-S is generally due on the 15th day of the third month after the end of the tax year. Form 2553 generally must be filed no later than two months and 15 days after the beginning of the tax year in which the election is intended to take effect, although late-election relief is often available.
Accounting, payroll, and tax-preparation costs can reduce or eliminate the expected savings for practices with modest profits.
You May Owe Tax Without Receiving the Cash
Shareholders may owe income tax on their allocated share of S corporation income even when the practice does not distribute all of that income to them.
For example, the practice may retain cash to purchase equipment, cover operating expenses, repay debt, or build reserves. The owner may still need personal funds to pay the tax associated with the retained income.
This makes cash-flow planning and a clear distribution policy important, particularly when a practice has multiple owners.
Shareholder Basis Must Be Tracked
An S corporation shareholder’s stock and debt basis changes as the practice earns income, incurs losses, makes distributions, and receives additional capital.
Basis affects whether a distribution is taxable and whether an owner can deduct certain losses. The IRS places the responsibility for tracking basis on the shareholder, not the corporation.
Poor basis records can create problems years later, especially during a practice sale, ownership transition, audit, or large distribution.
Distributions Do Not Support Retirement Contributions
S corporation distributions are not considered earned compensation for retirement-plan purposes. Owner contributions and employer contributions to a 401(k) are generally based on W-2 compensation, not shareholder distributions.
Paying a lower salary may reduce payroll taxes, but it may also reduce the amount the owner can contribute to a retirement plan. That tradeoff should be included in the analysis.
The Qualified Business Income Deduction Can Complicate the Decision
The qualified business income deduction generally allows eligible taxpayers to deduct up to 20% of qualified business income and was made permanent under legislation enacted in 2025.
However, reasonable compensation paid by an S corporation is not included in QBI. In addition, healthcare services are treated as a specified service trade or business, which can limit or eliminate the deduction for owners whose taxable income exceeds the applicable thresholds.
Because optometry is a healthcare profession, practice owners should evaluate how an S corporation election and the proposed owner salary may affect the QBI deduction rather than assuming the election will always lower the total tax bill.
State Treatment Varies
Not every state follows the federal S corporation treatment in the same way. A state may impose franchise taxes, minimum taxes, entity-level taxes, separate elections, or additional filing requirements.
A federal tax benefit may therefore be reduced by state-level costs.
When Might an S Corporation Make Sense?
An S corporation may be worth considering when:
- The practice consistently earns more than a defensible market-rate salary for the owner
- The expected tax savings exceed the additional payroll, accounting, and filing costs
- The owner is prepared to run payroll and maintain accurate records
- The practice has stable cash flow
- The ownership structure satisfies S corporation requirements
- The election fits the owner’s retirement, benefit, and long-term transition plans
There is no universal profit threshold at which an S corporation automatically becomes worthwhile.
The relevant number is the practice’s expected profit after paying reasonable owner compensation—not its collections, production, or gross revenue.
When Might It Not Be the Best Choice?
An S corporation may provide limited benefit when:
- The practice is new and has little or no profit
- Nearly all of the practice’s profit represents reasonable compensation for the owner’s work
- The owner does not want the added payroll and compliance responsibilities
- The additional professional fees would consume most of the projected savings
- The practice expects to add an owner who is not an eligible S corporation shareholder
- The owners need an economic arrangement that does not fit the S corporation’s ownership restrictions
- State taxes or fees significantly reduce the federal benefit
A new practice owner does not necessarily need to make an S corporation election immediately.
For a startup, the first priority may be reaching sustainable profitability. For someone purchasing an established practice, the projected cash flow may make it appropriate to evaluate the election as part of the acquisition and entity-formation process.
Questions to Ask Before Making the Election
Before moving forward, ask your tax advisor:
- What will the practice’s annual profit be before owner compensation?
- What salary would reasonably reflect my clinical and administrative work?
- How much profit would remain after paying that salary?
- What are the projected payroll-tax savings?
- What additional payroll, tax-preparation, and state costs will the practice incur?
- How will the election affect my QBI deduction?
- How will my salary affect retirement contributions?
- How should health insurance and other owner benefits be handled?
- What records should we maintain to support reasonable compensation?
- How could the structure affect a future associate buy-in, partner addition, or practice sale?
Your advisor should be able to show you a comparison of the projected total taxes and expenses under each available structure. A recommendation based only on a broad rule of thumb is not enough.
The Bottom Line
An S corporation can be an effective tax-planning tool for a profitable optometry practice, but it is not automatically the right answer for every owner.
The strongest candidates are practices producing consistent profit beyond what would reasonably be paid to the owner for clinical and management services. Even then, the potential payroll-tax savings must be weighed against additional compliance costs, retirement-plan effects, QBI limitations, state taxes, and long-term ownership goals.
Do not make the election simply because another practice owner did.
Review your actual numbers, establish a defensible salary, and work with an advisor who understands the financial realities of private optometry practice. The right structure should support both your current tax strategy and the future of your practice.
This article is intended for general educational purposes and does not constitute tax, legal, or financial advice. Tax laws and individual circumstances vary. Consult a qualified advisor before selecting or changing your business’s tax classification.
