Massachusetts Payroll Taxes: 2026 Employer Guide
Quick Facts
Key payroll tax details at a glance.
State Income Tax
Progressive (up to 9.00%)
SUI New Employer Rate
2.13%
SUI Wage Base
$15,000 per employee
SUI Rate Range
0.56% to 8.62%
Employee SUI Contribution
No
Local Taxes
No
Massachusetts Payroll Landscape
Massachusetts keeps its income tax relatively simple with a flat 5% base rate, though the 4% "millionaire's tax" surtax on income above $1,083,150 creates a two-tier system. The bigger compliance item for most employers is the Paid Family and Medical Leave (PFML) program, which requires both employer and employee contributions.
PFML administration involves calculating the correct split between employer and employee shares, which varies based on company size. Massachusetts does not have local income taxes, which is a significant simplification compared to neighbors like New York. The SUI new employer rate of 2.13% and wage base of $15,000 are both moderate.
This guide breaks down each of Massachusetts's employer obligations: registration requirements, 2026 tax rates and wage bases, filing deadlines, and the compliance pitfalls that catch expanding startups off guard. Whether you're hiring your first Massachusetts employee or managing a growing remote team, everything you need to stay compliant is here.
Massachusetts State Income Tax
Withholding rates, brackets, and forms.
Tax Type
Progressive
Top Rate
9.00%
Withholding Form
M-4
Massachusetts Unemployment Insurance (SUI)
Employer rates, wage bases, and contribution details.
New Employer Rate
2.13%
Wage Base
$15,000 per employee
Rate Range
0.56% to 8.62%
Employee Contribution
—
Massachusetts SUI (State Unemployment Insurance) is an employer-paid tax that funds unemployment benefits for workers who lose their jobs. It is administered by the Massachusetts Department of Unemployment Assistance. Registration: Employers must register with the Massachusetts Department of Unemployment Assistance as soon as they hire their first Massachusetts employee. Registration can be completed online.
Massachusetts Additional Employer Taxes
Other state-mandated payroll contributions.
Paid Family and Medical Leave (PFML)
0.88% total
Massachusetts Compliance Checklist
Deadlines, filing requirements, and official resources.
Key Deadlines
Withholding deposits
Due Varies by liability
Quarterly returns (Q1)
Due April 30
Quarterly returns (Q2)
Due July 31
Quarterly returns (Q3)
Due October 31
Quarterly returns (Q4)
Due January 31
Annual reconciliation
Due January 31
W-2 state copies
Due January 31
New hire report
Due Within 14 days of start date
How Warp Handles Massachusetts Payroll
Warp is the only AI-native HR & Payroll platform built for ambitious companies. Instead of clicking through clunky dashboards or Massachusetts's .gov websites for taxes, Warp's AI agents open your Massachusetts tax accounts, file every payroll form, and resolve every tax notice automatically.
What Warp handles for Massachusetts employers:
- Massachusetts tax account registration and setup
- Automated income tax withholding calculations and deposits
- SUI registration and quarterly filings
- Paid Family and Medical Leave (PFML) setup and remittance
- Annual W-2 and reconciliation filing
- Tax notice resolution directly with Massachusetts agencies, so you never spend hours on hold
Every Warp customer gets a dedicated Account Manager and Benefits Advisor included to guide them through payroll setup, multi-state expansion, and benefits selection. You'll never visit a government website, negotiate with tax agencies, or pay an accountant $150 per quarterly filing.
If you don't want to deal with navigating Massachusetts .gov portals, check out a demo of Warp to see how we can help you stop worrying about compliance and get back to building.
Tax data last verified: March 12, 2026