PLLC Taxed as S Corp: Election, Reasonable Salary, and QBI

A PLLC can be taxed as an S corp by filing IRS Form 2553, and for licensed professionals earning meaningfully more than a market salary for their own work, the election is one of the most reliable ways to lower federal employment taxes. The state still treats the entity as a PLLC for licensing and liability purposes. The IRS treats it as an S corporation for tax purposes. Your professional obligations and liability protection do not change. What changes is how much of your income runs through payroll taxes.

Where the Tax Savings Come From

Without the election, a single-member PLLC is taxed as a sole proprietorship and a multi-member PLLC as a partnership. Either way, all net income flows to the owners and is subject to self-employment tax at 15.3% (12.4% Social Security on earnings up to $184,500 in 2026, plus 2.9% Medicare on all earnings). An additional 0.9% Medicare tax applies above $200,000 for single filers or $250,000 for married couples filing jointly.¹

After the S corp election, an owner who works in the business pays herself a salary that runs through payroll taxes, and any remaining profit is distributed free of those employment taxes. If a solo attorney’s PLLC nets $250,000 and she pays herself $130,000 in salary, only the $130,000 is hit with payroll taxes. The remaining $120,000 in distributions avoids the 15.3% self-employment tax, saving roughly $18,000 a year. That gap is the entire reason to make the election.

Does Your PLLC Qualify

The IRS requires the entity to meet every one of the following:

Organized under the laws of a U.S. state or territory.
100 or fewer shareholders, with family members countable as one.
Owners limited to individuals, certain trusts, and estates. No partnerships, corporations, or nonresident aliens.
One class of stock. Voting differences alone are fine; distribution or liquidation differences are not.
Not an ineligible corporation (certain financial institutions, insurance companies, and DISCs).

These restrictions line up naturally with how PLLCs are set up. State professional licensing boards typically require that only individually licensed professionals own interests in a PLLC, which already excludes the owner types the IRS bars.²

Filing Form 2553

The election is made on IRS Form 2553, Election by a Small Business Corporation. Every person who owns an interest in the PLLC on the day the election is made must sign the consent section.³

You do not need to file Form 8832 first. This confuses professionals and some preparers, because a PLLC is an LLC and LLCs normally file 8832 to change classification. Under Treasury regulations, an eligible entity that timely files Form 2553 is automatically treated as having elected corporate classification. The two elections happen at once.⁴

Deadlines

Form 2553 must be filed no later than two months and 15 days after the first day of the tax year the election should take effect, or at any point during the preceding tax year. For a calendar-year PLLC, that is March 15. File by March 15 of the current year to get S treatment starting January 1, or file anytime in the prior year.⁵ File after March 15 but before the 15th day of the third month of the following year, and the election applies to the next tax year, not the current one.³

Late Election Relief

Missing the deadline does not always mean waiting another year. The IRS grants relief for a late election when all of the following are true:

The PLLC intended to be classified as an S corporation and is otherwise eligible.
The failure to file on time was due to reasonable cause.
The entity and all owners reported income consistently with S corporation status for the year the election should have been effective and every year after.
Fewer than 3 years and 75 days have passed since the intended effective date.

You request relief by filing Form 2553 with a reasonable-cause statement. Many are processed without a private letter ruling, though more complex situations may need one.⁶

The Reasonable Salary Rule

Most of the savings and most of the risk sit here. Once the PLLC is taxed as an S corporation, every owner who works in the business must draw a salary reflecting fair market compensation for the work they actually do. The IRS position is unambiguous: if a shareholder receives cash, or has the right to, the S corporation must pay reasonable compensation before making distributions.⁷

Setting salary artificially low to convert wages into distributions is the classic misuse of the election, and courts routinely knock it down. In the Watson case, the Eighth Circuit upheld a finding that a CPA paying himself $24,000 while taking large distributions was not paying reasonable compensation. When the IRS reclassifies distributions as wages, you owe back employment taxes plus interest and penalties.⁷

The IRS and courts look at comparable pay for similar roles at similar businesses, the owner’s training and experience, time devoted to the business, what non-owner employees earn for similar work, and the entity’s distribution history. Comparable pay in the marketplace tends to carry the most weight. A radiologist running a solo PLLC cannot support a $50,000 salary when employed radiologists earn three times that.⁸

The QBI Trade-Off for Professional Services

Most PLLCs sit in law, medicine, accounting, consulting, or financial services. All of those are Specified Service Trades or Businesses under Section 199A, and the 20% qualified business income deduction phases out by income for SSTBs where it does not for other businesses.⁹

The QBI deduction was made permanent by the One Big Beautiful Bill Act signed in July 2025. For SSTB owners filing jointly in 2026, the deduction phases out between roughly $394,600 and $544,600 in taxable income. Above that range, SSTB owners get no QBI deduction at all.

The interaction matters. Salary paid to an S corp owner is not qualified business income, so only the profit remaining after your salary counts toward the deduction. If your PLLC nets $300,000 and you pay yourself a $150,000 salary, your QBI is $150,000 and your maximum deduction is $30,000. As a sole proprietorship the full $300,000 would have been QBI, potentially yielding $60,000. The employment tax savings need to exceed the lost QBI deduction for the election to pay off.

For higher-income SSTB owners whose taxable income already sits above the phase-out, the QBI deduction is gone regardless, and the S election becomes a straightforward win. For owners inside or below the phase-out range, run the numbers before electing.

Health Insurance and Fringe Benefits

If you own more than 2% of the PLLC, which covers almost every solo or small-group setup, the tax treatment of health insurance shifts once you elect. The S corporation can pay your premiums, but they must be added to wages in Box 1 of your W-2. They are not subject to Social Security or Medicare, so they do not appear in Boxes 3 or 5. You then claim the self-employed health insurance deduction on your personal return.

Getting the W-2 wrong causes real problems. Leave premiums out of Box 1 and you lose the deduction. Put them in Boxes 3 and 5 and you pay FICA you did not owe. HSA contributions the S corporation makes for a 2% shareholder follow the same reporting rule.

Several fringe benefits that regular employees get tax-free become taxable wages for 2% or greater shareholders: group-term life insurance, employer-provided meals and lodging, and commuting benefits. And 2% shareholders cannot participate in a Section 125 cafeteria plan at all; letting them do so can disqualify the plan for every other employee.

Ongoing Payroll and Filings

Running an S corporation means more paperwork than a sole proprietorship or partnership. The PLLC files Form 1120-S annually to report income, deductions, and credits, and issues each owner a Schedule K-1 to carry those items to the personal return.¹⁰

Because the owners are now employees, the PLLC must run payroll: withholding federal income tax, Social Security, and Medicare from each owner-employee’s paycheck and paying the employer’s share. Form 941 is filed quarterly.¹¹ Add annual W-2s and federal and state unemployment filings. Most PLLCs that elect S status use a payroll service, typically running $500 to $2,000 per year depending on employees and pay frequency.

How the Election Can Be Lost

The election stays in effect until it is voluntarily revoked or involuntarily terminated. Termination happens automatically if the PLLC stops meeting any eligibility requirement. For a professional practice, the most common risks are admitting an ineligible owner (another entity, a nonresident alien) or letting distributions drift out of proportion to ownership. Disproportionate distributions can be treated as creating a second class of stock, and even a one-time bookkeeping error could technically terminate the election.

If termination is accidental, a simplified relief procedure lets you cure the problem without a private letter ruling if you show the termination was inadvertent, correct it, and demonstrate reasonable cause. Without relief, once terminated the PLLC generally cannot re-elect S status for five tax years.³

State Treatment Is a Separate Question

The S corporation election is federal. Most states follow it and tax the entity as a pass-through, but several either do not recognize the S election or apply their own entity-level taxes. A handful tax S corporations similarly to C corporations for state purposes, which eats into the federal savings. Some states also impose minimum franchise or excise taxes on S corporations regardless of income, and a few require a separate state-level S election on top of Form 2553. Confirm your state’s treatment before filing federally so the first state return does not surprise you.

1
Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)
2
Office of the Law Revision Counsel. 26 USC 1361 – S Corporation Defined
3
Office of the Law Revision Counsel. 26 USC 1362 – Election, Revocation, Termination
4
Internal Revenue Service. FAQs on Limited Liability Company Classification
5
Internal Revenue Service. Instructions for Form 2553
6
Internal Revenue Service. Late Election Relief
7
Internal Revenue Service. S Corporation Employees, Shareholders and Corporate Officers
8
Internal Revenue Service. Fact Sheet FS-2008-25 – Wage Compensation for S Corporation Officers
9
eCFR. 26 CFR 1.199A-5 – Specified Service Trades or Businesses and the Trade or Business of Performing Services as an Employee
10
Internal Revenue Service. About Form 1120-S, U.S. Income Tax Return for an S Corporation
11
Internal Revenue Service. About Form 941, Employer’s Quarterly Federal Tax Return