Payroll taxes are the most cash-sensitive tax obligation a business faces. Unlike income tax, FICA taxes are collected from employees and held in trust for the government - using those funds for other purposes triggers the trust fund recovery penalty under IRC §6672, a 100% penalty assessed personally against any "responsible person." Worker misclassification - treating employees as independent contractors - creates years of back payroll taxes, penalties, and interest. These are two of the most devastating tax problems in small business practice.
Social Security (OASDI): 6.2% employee + 6.2% employer = 12.4% combined, on wages up to $184,500 (2026 wage base)
Medicare (HI): 1.45% employee + 1.45% employer = 2.9% combined, no wage base limit
Additional Medicare Tax: 0.9% employee-only on wages above $200,000 (single) / $250,000 (MFJ) - employer withholds from $200K threshold regardless of filing status
FUTA: 6.0% federal rate on first $7,000 of wages, reduced to 0.6% net after the 5.4% state credit for employers in states with approved unemployment programs
Employers must withhold employee FICA and income tax from wages and deposit these amounts with the IRS on a schedule based on total tax liability. Deposits are made through the Electronic Federal Tax Payment System (EFTPS). Missing deposit deadlines triggers graduated failure-to-deposit penalties under IRC §6656 (2%, 5%, 10%, or 15% depending on how late the deposit is).
| Deposit Schedule | Who Qualifies | Deadline |
|---|---|---|
| Monthly | Employers whose total taxes were $50,000 or less in the lookback period (the 4 quarters ending June 30 of the prior year) | 15th of the following month |
| Semi-weekly | Employers whose total taxes exceeded $50,000 in the lookback period | Wednesday payday: deposit by following Wednesday. Friday payday: deposit by following Friday |
| Next-day ($100,000+) | Any employer whose accumulated liability reaches $100,000 or more on any day during a deposit period | Next business day - regardless of regular deposit schedule |
| Annual (Form 944) | Employers whose annual liability is $1,000 or less (IRS must notify employer of eligibility) | January 31 of following year |
This is one of the most severe penalties in the tax code. When an employer fails to collect and pay over trust fund taxes - the employee's share of FICA and withheld income taxes - the IRS can assess a 100% penalty personally against any "responsible person" who willfully failed to collect or pay over those taxes.
The IRS looks for anyone who had authority to determine which creditors get paid. This typically includes: business owners, officers with financial authority, shareholders who controlled company finances, and in some cases bookkeepers or office managers who signed checks. Having the title "president" or "owner" creates a presumption of responsibility. The defense is either: (a) not responsible - no actual authority over payroll decisions, or (b) not willful - did not know the taxes were unpaid.
Willfulness for TFRP purposes does not require intent to defraud. It means: the responsible person knew the taxes were due and either intentionally chose not to pay them, or recklessly disregarded the obvious risk that taxes were not being paid. Paying other creditors (rent, vendors, employees) while knowing payroll taxes are unpaid is willfulness. Ignorance of the tax obligation is generally not a defense once the person has signing authority over company funds.
Misclassifying an employee as an independent contractor is one of the most common and costly payroll tax errors. If the IRS reclassifies a worker as an employee, the employer owes back employer FICA taxes, is liable for the employee's share of FICA (with limited offset for amounts the worker already paid as self-employment tax), plus interest and failure-to-deposit penalties - potentially for multiple years.
Worker classification is determined under the common law test - does the hiring party have the right to control not just the result of the work but the manner and means by which the result is achieved? The IRS groups the relevant factors into three categories under Rev. Rul. 87-41:
| Category | Factors Suggesting Employee | Factors Suggesting Contractor |
|---|---|---|
| Behavioral Control | Instructions on when/where/how to work; training provided by company; set hours; supervised closely | Worker controls how job is done; no company training; flexible schedule; works independently |
| Financial Control | Company provides tools and equipment; worker not at risk for profit/loss; paid by hour or salary; cannot work for competitors | Worker invests in own equipment; can profit or lose money; paid by project; works for multiple clients |
| Type of Relationship | Written employment contract; employee benefits (health insurance, pension); relationship is permanent or indefinite; work is core business function | Written independent contractor agreement; no benefits; project-based relationship; work is specialized/outside core business |
IRC §530 of the Revenue Act of 1978 (not codified in the IRC) provides a safe harbor against reclassification if the employer: (a) consistently treated the workers as contractors and did not treat any substantially similar workers as employees, (b) timely filed all required 1099s for those workers, and (c) had a reasonable basis for treating them as contractors (based on court decision, revenue ruling, past IRS audit, or long-standing industry practice). The §530 safe harbor does not apply to technical service workers (software engineers, programmers, systems analysts) in some circumstances.
Employers who want to reclassify workers as employees prospectively can apply for the VCSP under Announcement 2012-45. The VCSP allows reclassification at significantly reduced cost: 10% of the employment taxes that would have been owed on the workers' compensation in the most recent tax year. The employer must not be under IRS or DOL audit and must agree to treat the workers as employees going forward.