Massachusetts employers have three main state-level payroll obligations beyond federal requirements. Income tax withholding, unemployment insurance, and Paid Family and Medical Leave all require separate registration and regular compliance.

State income tax withholding uses a flat rate applied to employee wages. Each employee completes Form M-4 to claim exemptions, and you calculate withholding based on that form. Remit withholdings to the Department of Revenue monthly or quarterly depending on your total liability.

Unemployment insurance is employer-paid only in Massachusetts. New employers start at a standard rate, but your rate adjusts over time based on your claims history. If former employees file unemployment claims, your rate increases. Fewer claims means lower rates over time. Register with the Department of Unemployment Assistance when you hire your first employee and file quarterly wage reports along with contributions.

Paid Family and Medical Leave catches many employers off guard. Both employer and employee portions fund this program, and you’re responsible for withholding the employee share from each paycheck. A managed payroll service handles these calculations automatically, but if you’re doing it yourself, make sure you understand which portions apply based on your employee count. Employers with fewer than 25 covered employees have reduced requirements but still need to participate. File and remit quarterly to the Department of Family and Medical Leave.

Before running your first payroll, register with all three state agencies plus the IRS for federal withholding. You’ll receive account numbers needed for any payroll system you use.

Federal payroll taxes run alongside state obligations. Social Security, Medicare, federal unemployment, and federal income tax withholding apply to every paycheck. The rates and deposit schedules differ from state requirements, so tracking both layers takes careful attention.

Quarterly filings set the rhythm for Massachusetts employers. Missing deadlines brings penalties, and rates for UI and PFML change annually. Review your payroll setup each January to confirm new rates are applied correctly.

Getting payroll compliance right from the start saves headaches later. Working with an Andover, MA payroll service means someone else tracks the rate changes, filing deadlines, and deposit requirements while you focus on running your business.