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Payroll Tax Calculator

Calculate employer and employee FICA, FUTA, and withholding obligations for W-2 employees under IRC Chapter 21.

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What Is the Payroll Tax Calculator?

Payroll taxes are the employer-side taxes required when you hire W-2 employees. This calculator computes three distinct obligations: (1) the employer's share of FICA under IRC Chapter 21 -- 6.2% Social Security tax on wages up to the $176,100 wage base and 1.45% Medicare tax on all wages; (2) Federal Unemployment Tax (FUTA) under IRC Chapter 23 -- a 6.0% tax on the first $7,000 of each employee's wages, typically reduced to 0.6% after the standard 5.4% credit for timely state unemployment tax payments; and (3) federal income tax withholding based on the employee's W-4 elections. Employers must also match the employee's FICA contributions, making the total Social Security and Medicare cost 15.3% split evenly. Payroll taxes are deposited semi-weekly or monthly depending on your lookback period liability, reported quarterly on Form 941, and reconciled annually on Form W-2 and Form W-3. This tool helps business owners budget the true cost of employment beyond the stated salary.

How to Use This Calculator

1

Enter Employee Salary

Input the gross annual salary for the employee. The calculator handles the Social Security wage base cap automatically.

2

Select Pay Frequency

Choose weekly, biweekly, semi-monthly, or monthly pay periods to see per-paycheck breakdowns of employer costs.

3

Scale for Your Team

Enter your number of employees to see total annual payroll tax obligations across your entire workforce.

Key Concepts

FICA (IRC Chapter 21)

Federal Insurance Contributions Act: 6.2% Social Security + 1.45% Medicare from both employer and employee. Employer share is a deductible business expense.

FUTA (IRC Chapter 23)

6.0% on the first $7,000 of each employee's wages. The 5.4% state credit reduces the effective rate to 0.6% ($42/employee/year) in most states.

Form 941 Filing

Employers file Form 941 quarterly to report wages paid, tips, federal income tax withheld, and both employer/employee shares of FICA.

Deposit Schedules

Monthly depositors must deposit by the 15th of the following month. Semi-weekly depositors deposit within 1-3 business days depending on payday.

Expert Insights

True Cost of Employment: The sticker price of a salary significantly understates the real cost. On a $65,000 salary, employer FICA adds $4,972.50, FUTA adds $42, and state unemployment (varying by state and experience rating) can add $200-$3,000+. Before accounting for benefits, workers comp, and overhead, the employer cost is roughly 108-115% of the stated salary.

Misclassification Risk: Misclassification of employees as independent contractors remains the most heavily scrutinized payroll compliance issue. The IRS uses a 20-factor common law test focusing on behavioral control, financial control, and the type of relationship. Misclassification triggers liability for unpaid FICA, FUTA, withholding, and penalties under IRC Section 3509. The penalties are 1.5% of wages for income tax withholding failures and 20% of the employee FICA share the employer should have withheld.

Use Payroll Services: Consider using a payroll service (ADP, Gusto, Paychex) even for a single employee. The cost ($40-80/month + per-employee fees) is far less than the penalty exposure from late deposits, incorrect withholding calculations, or missed filing deadlines.

Frequently Asked Questions

FICA (Federal Insurance Contributions Act) funds Social Security and Medicare. Both the employer and employee pay 7.65% each (15.3% total). FUTA (Federal Unemployment Tax Act) funds unemployment insurance and is paid only by the employer at an effective rate of 0.6% on the first $7,000 of each employee's annual wages. FICA applies to all wages up to the Social Security cap; FUTA applies only to the first $7,000.
The employer stops withholding and matching the 6.2% Social Security tax once an employee's cumulative wages for the year reach the wage base limit -- $176,100 for 2025. Medicare tax (1.45% employer share) has no wage cap and continues on all earnings. If an employee works multiple jobs, each employer withholds independently; the employee can claim a refund for excess Social Security tax paid.
S-corporation owner-employees who perform services must receive a "reasonable" W-2 salary subject to full FICA withholding and matching. The IRS defines reasonable as comparable to what a third party would pay for the same services. Remaining profits distributed via Schedule K-1 are not subject to FICA. The salary must be paid and reported before any distributions are taken.
The penalty structure under IRC Section 6656 is tiered: 2% for deposits 1-5 days late, 5% for 6-15 days late, 10% for more than 15 days late, and 15% if not deposited within 10 days of the first IRS notice. These penalties apply to the amount of the underpayment. On top of that, the trust fund recovery penalty (IRC 6672) holds responsible persons personally liable for unpaid employee withholding.
It depends on the benefit. Employer contributions to qualified retirement plans (401(k), SEP), health insurance premiums, HSA contributions, and group-term life insurance up to $50,000 are generally exempt from FICA and FUTA. However, taxable fringe benefits like personal use of a company car, gym memberships, and most cash bonuses are subject to payroll taxes just like regular wages.

This calculator provides estimates for educational purposes only. Tax laws change frequently and individual circumstances vary. These estimates do not constitute tax advice. Consult a qualified CPA or tax professional before making tax-related decisions.

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