Every employer must withhold federal income tax, Social Security (6.2%), and Medicare (1.45%) from employee wages and deposit these amounts to the IRS via EFTPS on either a monthly or semi-weekly schedule — depending on prior-year payroll liability. The 2025 Social Security wage base is $176,100. Form 941 is filed quarterly; Form 940 annually. Late or incorrect deposits carry penalties of 2% to 15% of unpaid taxes, scaling with the number of days late — starting from the first day of delinquency. As of 2025, mandatory e-filing is triggered once you file 10 or more total information returns (W-2s, 1099s, 941s combined). GAP manages all federal deposit schedules and filings with zero late submissions.

A business with employees in multiple states — including remote employees who work from home in states different from the company's headquarters — is subject to the payroll laws of each state in which an employee works. This includes state income tax withholding, state unemployment insurance (SUI) registration and payment, state-specific minimum wage and overtime rules, and state disability insurance in states that require it (CA, NJ, NY, RI, HI). California imposes additional complexity: daily overtime kicks in after 8 hours (not 40 per week), and non-compliance is among the most expensive state payroll liability in the US. Multi-state payroll errors rose 38% year-over-year in 2025 as remote work expanded. GAP applies the correct state-specific rules to each employee's payroll from their first pay cycle — including any new state obligations triggered when an existing employee relocates.

Worker misclassification is the single highest-value payroll liability a small business carries. Misclassifying an employee as an independent contractor means the employer has not withheld income tax, has not paid the employer's share of FICA, and may owe overtime under FLSA. When identified — by audit, by the worker filing an SS-8, or by a DOL investigation — the employer owes all back taxes, plus the employee's share of FICA (which the employer now cannot collect), plus liquidated damages equal to unpaid overtime wages. The 2026 FLSA enforcement environment increased scrutiny on worker classification, with the DOL's Wage and Hour Division returning to an 'economic-realities' test that prioritises substance over form. GAP conducts an annual worker classification audit for every engagement, documenting each worker relationship under the current enforcement standard.

W-2 forms must be distributed to all employees and filed with the Social Security Administration by January 31. 1099-NEC forms must be distributed to all qualifying contractors and filed with the IRS by January 31. From 2024 onward, mandatory e-filing applies once you submit 10 or more total information returns. Form 1095-C (ACA compliance) applies to employers with 50 or more full-time equivalent employees and must be filed with the IRS and distributed to employees by March 31 (e-file). GAP prepares, reviews, and files all year-end forms in compliance with current IRS e-filing requirements — delivered before the January 31 deadline without exception.

Every time an employee works from a new state, the employer acquires new payroll obligations in that state: tax registration, SUI account, state withholding, and compliance with that state's wage and hour laws. Remote work has made this a common occurrence for businesses that previously operated from a single location. A business headquartered in Texas with employees in California, New York, and Illinois is subject to the payroll laws of all four states simultaneously — with California's complexity alone requiring specific overtime, SDI, SUI, and pay transparency management. GAP identifies new state obligations before the first payroll run for any new state hire and registers the employer with the appropriate state agencies as required.