S Corp payroll requirements start with a rule that surprises many new owners: if you work in your S corporation, the company must put you on payroll as a W-2 employee, pay you a reasonable salary before taking any profit distributions, withhold federal income tax and FICA from that salary, deposit those taxes on the IRS schedule that applies to your business, and file the quarterly and annual employment tax returns that report it all. Miss any of those pieces and the penalties often exceed whatever the S election was supposed to save.
Paying Yourself a Reasonable Salary
The IRS is direct about this. The instructions to Form 1120S state that distributions and other payments to a corporate officer “must be treated as wages to the extent the amounts are reasonable compensation for services rendered to the corporation.”1IRS. Wage Compensation for S Corporation Officers Any officer who performs more than minor services has to be compensated through W-2 wages, not shareholder distributions alone. Audits of S corporations with suspiciously low wages and large distributions are a regular IRS activity.2Internal Revenue Service. S Corporation Employees, Shareholders and Corporate Officers
Reasonable compensation means what an unrelated employer would pay someone with your skills to do the same job in the same area. There is no formula in the tax code. The often-repeated “60/40 salary-to-distribution split” has no legal basis. The IRS fact sheet on officer compensation explicitly states there are “no specific guidelines for reasonable compensation in the Code or the Regulations” and that courts decide each case on its own facts.1IRS. Wage Compensation for S Corporation Officers
What the IRS Looks At
When an auditor evaluates whether your salary is reasonable, the factors that carry weight include:
- Your training, credentials, and experience.
- Your actual duties and time commitment in the business.
- What comparable businesses pay for similar roles, drawn from salary surveys and Bureau of Labor Statistics data for your area.
- What the corporation pays non-shareholder employees doing similar work.
- The corporation’s history of distributions relative to wages.
- Whether a formal, documented compensation agreement exists.
Documenting the Number
The burden of proof is on the S corporation, not the IRS. Pull objective data from salary surveys, industry compensation reports, or job listings, and record your methodology in the corporate minutes with the specific industry, geography, and duties you relied on. A third-party compensation study is the strongest defense. Even a well-organized internal analysis beats no documentation at all.
What Reclassification Looks Like
If the IRS decides your salary was artificially low, it can reclassify part of your distributions as wages.2Internal Revenue Service. S Corporation Employees, Shareholders and Corporate Officers The reclassified amount becomes subject to full Social Security and Medicare tax, and the corporation owes both the employer and employee shares. Add interest from the original due dates, potential accuracy-related penalties, and the paperwork burden of filing corrected W-2c forms for each affected year.3Internal Revenue Service. About Form W-2 C, Corrected Wage and Tax Statements
Setup Before the First Paycheck
Federal and State Registrations
The corporation needs a Federal Employer Identification Number before it can file anything employment-tax-related. You can apply online at irs.gov and receive the EIN immediately.4Internal Revenue Service. Get an Employer Identification Number
You also need to register with the state revenue department for income tax withholding in every state where an employee lives or works, and separately with the state workforce or labor agency for unemployment insurance. Complete both before running your first payroll.
Onboarding Paperwork
Every employee, including you, completes Form W-4 before the first paycheck. It tells the corporation how much federal income tax to withhold based on filing status and adjustments.5Internal Revenue Service. About Form W-4, Employee’s Withholding Certificate
Form I-9 verifies work authorization. The employee completes Section 1 no later than the first day of work, and the employer examines identity and work authorization documents within three business days after that. Retain completed I-9s for three years after the hire date or one year after employment ends, whichever is later.6U.S. Citizenship and Immigration Services. I-9, Employment Eligibility Verification
New Hire Reporting
Federal law requires reporting every newly hired or rehired employee to the state’s Directory of New Hires within 20 days. Many states impose shorter deadlines, some as short as seven days, so check your state’s rule.7Office of the Law Revision Counsel. 42 USC 653a – State Directory of New Hires
Choosing How to Run Payroll
You can handle payroll through commercial software, a manual spreadsheet-and-deposit process, or a third-party payroll service. For most S Corp owners who are their own primary employee, a payroll service is the cleanest path. The provider calculates withholdings, makes deposits, files quarterly and annual returns, and produces year-end W-2s. Monthly costs for a small business generally run from about $30 to $150, which is almost always less than the cost of one missed deposit.
The Taxes You Withhold and Pay
Social Security and Medicare
The W-2 salary is subject to FICA. Social Security is 12.4%, split evenly between employee (6.2%) and employer (6.2%), and for 2026 it applies only to the first $184,500 of wages.8Social Security Administration. Contribution and Benefit Base Medicare is 2.9%, split 1.45% each, with no wage cap.9Internal Revenue Service. Topic No. 751, Social Security and Medicare Withholding Rates
Once an employee’s cumulative wages pass $200,000 in a calendar year, an additional 0.9% Medicare tax kicks in. The employee alone bears it, but the employer must withhold it.10Internal Revenue Service. Questions and Answers for the Additional Medicare Tax
FICA applies only to salary. Distributions are not subject to it, which is exactly why the reasonable compensation rule exists.
Federal Income Tax Withholding
Federal income tax withholding is calculated each pay period using the employee’s W-4 and the wage bracket or percentage method tables in IRS Publication 15. Amounts vary with filing status, dependents, and any additional withholding the employee requests.
Federal Unemployment Tax
The corporation pays FUTA on the first $7,000 of each employee’s annual wages, including the owner. The statutory rate is 6.0%, and employers in states with federally approved unemployment programs receive a credit of up to 5.4%, bringing the effective rate to 0.6% in most states.11Internal Revenue Service. Instructions for Form 940 Only the employer pays FUTA; nothing comes out of the employee’s paycheck.
States with outstanding federal unemployment loan balances trigger a FUTA credit reduction, pushing the effective rate higher. For 2025, California and the U.S. Virgin Islands faced credit reductions.12Federal Register. Notice of the Federal Unemployment Tax Act (FUTA) Credit Reductions Applicable for 2025 The IRS updates the list each November.
State Unemployment Insurance
Each state sets its own SUI rate and taxable wage base. Rates depend on the corporation’s experience rating, which reflects claims filed by former employees. Taxable wage bases vary widely, from $7,000 in some states to over $78,000 in others. New businesses start at a default rate until they build a claims history.
When to Deposit Employment Taxes
Withholding the right amount is only half the job. Depositing on time is the half that trips people up.
Monthly or Semi-Weekly
Your deposit frequency for FICA and federal income tax depends on employment taxes reported during a four-quarter lookback period. For calendar year 2026, that lookback runs from July 1, 2024 through June 30, 2025. If total taxes in the lookback were $50,000 or less, you’re a monthly depositor, and each month’s taxes are due by the 15th of the following month. Above $50,000, you’re semi-weekly.13Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide
Under semi-weekly rules, taxes on wages paid Wednesday through Friday are due the following Wednesday. Taxes on wages paid Saturday through Tuesday are due the following Friday.14Internal Revenue Service. Employment Tax Due Dates
One override matters. If accumulated tax liability reaches $100,000 on any single day, the whole amount is due the next business day, no matter what schedule you normally follow. Triggering that rule also moves the corporation to semi-weekly for the rest of the year and the following year.15Internal Revenue Service. Topic No. 757, Forms 941 and 944 – Deposit Requirements
FUTA Deposits
FUTA runs on its own track. If FUTA liability exceeds $500 in any quarter, deposit it by the last day of the following month. If it’s $500 or less, carry it forward until the cumulative amount exceeds $500 or the annual return is due on January 31.16Internal Revenue Service. Topic No. 759, Form 940, Employer’s Annual Federal Unemployment Tax Return
Forms You Have to File
Form 941 Each Quarter
Most S corporations file Form 941 quarterly to report wages, federal income tax withheld, and FICA. It reconciles liability against deposits already made.17Internal Revenue Service. About Form 941, Employer’s Quarterly Federal Tax Return Deadlines are April 30, July 31, October 31, and January 31. If every deposit for the quarter was on time and in full, you get 10 extra days to file.18Internal Revenue Service. Instructions for Form 941 (Rev. March 2026)
Very small S corporations with $1,000 or less in annual employment tax liability may qualify to file Form 944 once a year instead. The IRS must authorize the switch in writing.19Internal Revenue Service. About Form 944, Employer’s Annual Federal Tax Return
Form 940 Once a Year
Form 940 reports FUTA for the prior year and is due January 31.20Internal Revenue Service. About Form 940, Employer’s Annual Federal Unemployment (FUTA) Tax Return
W-2 and W-3 by January 31
By January 31, furnish Form W-2 to every employee, including yourself, showing annual gross wages, federal and state income tax withheld, and FICA amounts.21Social Security Administration. Deadline Dates to File W-2s The same January 31 deadline applies for filing W-2 data with the Social Security Administration, along with Form W-3 summarizing them.22Social Security Administration. Checklist for W-2/W-3 Online Filing When January 31 falls on a weekend or holiday, the deadline shifts to the next business day. Errors on prior W-2s are corrected with Form W-2c, filed with the SSA as soon as the error is found.23Social Security Administration. Helpful Hints to Forms W-2c/W-3c Filing
State and Local Filings
Most states require quarterly reconciliation reports for state income tax withholding and SUI, plus W-2 data by January 31. Some cities impose their own payroll or wage taxes with separate rules. Confirm requirements with your state department of revenue and any applicable local authority.
The Health Insurance Reporting Rule for More-Than-2% Shareholders
S corporations follow a special payroll rule for health insurance premiums paid on behalf of any shareholder-employee who owns more than 2% of the stock or voting power. The corporation includes those premiums in the shareholder’s W-2 Box 1 wages, subject to federal income tax withholding, but not in Boxes 3 or 5, since the premiums are not subject to Social Security, Medicare, or FUTA.24Internal Revenue Service. S Corporation Compensation and Medical Insurance Issues
Doing this right lets the shareholder claim the self-employed health insurance deduction on their personal return, reducing AGI dollar-for-dollar. The plan must be established by the S corporation, which either pays premiums directly or reimburses the shareholder. The deduction is not available for any month the shareholder or their spouse was eligible to participate in a subsidized health plan through another employer.24Internal Revenue Service. S Corporation Compensation and Medical Insurance Issues
How Your Salary Ripples Into QBI and Retirement
The salary number you settle on drives more than your FICA bill. It also caps two other significant tax benefits.
Under Section 199A, S Corp shareholders can generally deduct up to 20% of qualified business income. For taxpayers above certain income thresholds, the deduction is capped at the greater of 50% of W-2 wages paid by the business, or 25% of W-2 wages plus 2.5% of the cost of the business’s depreciable property.25IRS. Determination of W-2 Wages (Also: Section 199A) Rev. Proc. 2019-11 Every dollar you shift from distributions to salary raises FICA but also raises the W-2 wage figure supporting a bigger QBI deduction. For higher-income owners, a salary set too low to save on FICA can cut the QBI deduction by more than the FICA savings. Model both directions before you commit.
Retirement contributions run off W-2 compensation, not total business profit. With a solo 401(k), the corporation can make an employer nonelective contribution of up to 25% of the owner’s W-2 pay, on top of the owner’s personal elective deferral up to the annual limit. An owner earning $100,000 in W-2 wages could receive an employer contribution of up to $25,000, plus that deferral.26Internal Revenue Service. One-Participant 401(k) Plans SEP IRA contributions follow a similar formula, up to the lesser of 25% of W-2 compensation or $72,000 for 2026, with no employee deferrals.27Internal Revenue Service. SEP Contribution Limits (Including Grandfathered SARSEPs) A low salary shrinks the maximum contribution the corporation can make on your behalf.
Penalties If You Get It Wrong
Late Deposits
The IRS applies escalating penalties on late employment tax deposits:
- 1 to 5 days late: 2% of the unpaid deposit.
- 6 to 15 days late: 5%.
- More than 15 days late: 10%.
- After an IRS notice demanding payment: 15%.
The tiers do not stack. A deposit 10 days late is 5%, not 2% plus 5%.28Internal Revenue Service. Failure to Deposit Penalty
The Trust Fund Recovery Penalty
Income tax, Social Security, and Medicare withheld from employee paychecks are held in trust for the government. If the corporation fails to turn them over, the IRS can assess a penalty equal to 100% of the unpaid trust fund taxes against any “responsible person” who willfully failed to collect or pay them.29Internal Revenue Service. Employment Taxes and the Trust Fund Recovery Penalty (TFRP)
A responsible person is anyone with authority to decide which creditors get paid, which in most S corporations is the owner. Willfulness does not require bad intent; paying vendors or rent while knowing payroll taxes are overdue is enough. Once assessed, the IRS can lien and levy the responsible person’s personal bank accounts, wages, and property. The corporate shield does not stop it.29Internal Revenue Service. Employment Taxes and the Trust Fund Recovery Penalty (TFRP)
Failure to File
Missing a deadline for Form 941 or another employment tax return triggers a separate penalty of 5% of the unpaid tax for each month or partial month the return is late, up to a maximum of 25%.30Internal Revenue Service. Failure to File Penalty Failure-to-file penalties compound with late deposit penalties, so a single missed cycle can generate several overlapping charges.