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Payroll taxes are complex, and they’re frequently audited. Federal income tax, FICA (Social Security and Medicare), and FUTA (unemployment insurance) are three separate taxes with different rates, wage bases, and deposit schedules. A single error compounds across 26 or 52 paychecks per year. That adds up fast.
Federal Income Tax (FIT) Withholding
Employers must withhold federal income tax from employee paychecks based on the employee’s W-4 election and current tax tables. The 2023 update to Form W-4 eliminated the traditional withholding allowances in favor of a cleaner “multiple jobs” calculation and income adjustment method. Employees can adjust their withholding at any time, and employers must honor changes on the next practical payroll date.
FICA: Social Security and Medicare
FICA is split between Social Security (6.2% employee + 6.2% employer) and Medicare (1.45% employee + 1.45% employer). Social Security has a wage base cap. For 2024, earnings over $168,600 aren’t subject to Social Security tax. Medicare has no wage cap. High-income earners also pay an extra 0.9% Medicare tax on wages over $200,000 (single) or $250,000 (married filing jointly).
FUTA: Federal Unemployment Tax
FUTA is a federal tax paid entirely by the employer (0.6% of the first $7,000 in wages per employee per calendar year in most states). FUTA credits are available for state unemployment taxes paid, which can reduce your FUTA liability. However, if your state has borrowed from the federal government to pay unemployment claims, your FUTA rate may be higher. That’s worth checking before you file.
Deposit and Reporting Timelines
Deposit schedules are determined by your “lookback period” (the previous four quarters). Monthly depositors pay on the 15th of the next month. Semi-weekly depositors have two deposit dates: Wednesday for paychecks from Monday–Wednesday, and Friday for Thursday–Sunday paychecks. Failure to deposit on time triggers steep penalties.
Bottom Line
Payroll tax errors are nearly impossible to avoid without a systematic, automated process. Manual calculations and spreadsheets introduce rounding, wage base, and rate errors that compound quickly. Nobody catches them until the IRS does.
Frequently Asked Questions
The Social Security wage base is the maximum annual wages subject to Social Security tax. For 2024, this is $168,600. It resets on January 1 each year and adjusts based on national average wage growth. Once an employee hits the wage base, no additional Social Security tax is withheld for the rest of the calendar year.
Social Security tax (6.2%) funds retirement, disability, and survivor benefits for workers. It has a wage base cap ($168,600 in 2024). Medicare tax (1.45%) funds healthcare benefits for workers 65 and older. Medicare has no wage base cap—it applies to all wages all year. High-income earners also pay an additional 0.9% Medicare surtax.
Deposit timing depends on your ‘lookback period’ (the previous four quarters’ tax liability). Monthly depositors pay by the 15th of the next month. Semi-weekly depositors must deposit Wednesday paychecks by the following Wednesday and Saturday paychecks by the following Friday. Missing deposits triggers penalties of 2% to 15% of the unpaid amount.
Automate federal payroll tax calculations and deposits.
Netchex calculates federal income tax, FICA, and FUTA automatically, tracks wage bases, and schedules deposits so errors never compound across your payroll.
This guide reflects publicly available product information and independent reviewer data (G2, Capterra, Trustpilot, Yelp, Better Business Bureau, Reddit, Software Advice, GetApp) as of 2026. Feature availability and pricing may vary by plan. Contact each provider for current details.
Disclaimer: Any product roadmap or future plans provided herein are for informational purposes only. They do not represent a commitment to deliver any material, code, feature, or functionality. Plans may change without notification. The development, release and timing of any features or functionality described remain at the sole discretion of Netchex, its affiliates, and partners. Netchex does not give legal, tax, or accounting advice. You are responsible for ensuring your use of Netchex product meets your individual business and compliance requirements.
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