Payroll Tax Compliance for Small Business Employers

Once you have employees, federal and state payroll tax obligations become your responsibility. Quarterly filings, deposit deadlines, and state requirements demand attention to avoid costly penalties.

Payroll tax obligations begin immediately. You must withhold federal income tax, Social Security (6.2%), and Medicare (1.45%) from each employee's wages, match the Social Security and Medicare portions, and deposit these taxes on a semi-weekly or monthly schedule depending on your total liability. Late deposits trigger graduated penalties from 2% to 15%.

Quarterly and annual filings are now required. File Form 941 each quarter to report wages paid and taxes withheld. File Form 940 annually for federal unemployment tax (FUTA) at 6.0% on the first $7,000 per employee, with a credit of up to 5.4% if you pay state unemployment on time. Issue W-2s to every employee by January 31.

State obligations vary significantly. Most states require unemployment insurance registration, workers' compensation coverage, and state-level withholding. Some states (like California) add disability insurance. A CPA familiar with your state ensures you register with the right agencies.

The pitfall: Many first-time employers underestimate deposit frequency requirements. Missing a payroll tax deposit deadline is one of the most expensive compliance mistakes -- the IRS assesses penalties and interest aggressively on trust fund taxes.