Massachusetts employer payroll taxes come in two stacks: a state package covering unemployment insurance, the Employer Medical Assistance Contribution, Paid Family and Medical Leave, workforce training, and income tax withholding, plus the federal FICA and FUTA taxes every employer owes on top. Your total cost per worker depends on wage levels, headcount, and your unemployment claims history, but every piece has a defined rate and filing schedule you need to get right.
The State Taxes You Owe
Unemployment Insurance
Under M.G.L. c. 151A, every Massachusetts employer pays into the state unemployment fund on the first $15,000 of each employee’s annual wages. Your rate is set by the Department of Unemployment Assistance based on your experience rating, which the agency recalculates each year from the claims filed against your account. Rates run from roughly 0.56% for employers with strong claims histories and a high positive reserve to above 18% for those with deeply negative reserves. 1General Court of Massachusetts. Massachusetts General Laws Chapter 151A – Unemployment Insurance New employers receive an assigned rate until they have enough history for the experience formula. The DUA mails your rate notice before each calendar year starts.
Employer Medical Assistance Contribution
EMAC funds healthcare access for low-income residents. Employers with more than five workers pay a base rate of 0.34% of total wages under M.G.L. c. 149, § 189; employers with five or fewer workers are exempt. 2General Court of Massachusetts. Massachusetts Code Chapter 149 Section 189 – Employer Medical Assistance Contribution Newly covered employers phase in: 0.12% the first calendar year of liability, 0.24% the second, then the full 0.34%. A separate EMAC supplement under § 189A can apply when your employees use MassHealth or ConnectorCare, and that amount is calculated from actual utilization. 3Cornell Law Institute. 430 CMR 21.10 – Disclosure of Information to Administer EMAC; Confidentiality
Paid Family and Medical Leave
PFML, authorized by M.G.L. c. 175M, funds paid time off for workers with a serious health condition, a new child, or a family member needing care. For 2026, the total contribution rate for employers with 25 or more covered individuals is 0.88% of eligible wages, split between a 0.18% family leave portion and a 0.70% medical leave portion. 4Mass.gov. Paid Family and Medical Leave Employer Contribution Rates and Calculator
You can withhold up to 100% of the family leave share and up to 40% of the medical leave share from employee wages. The employer’s minimum out-of-pocket share is the remaining 60% of the medical contribution, which works out to 0.42% of eligible wages. Covering more than the minimum is allowed.
Employers with fewer than 25 covered individuals pay an effective rate of 0.46% and owe no employer share of the medical leave contribution; they can pass the full amount through to employees via withholding. The taxable wage base matches the federal Social Security cap, which is $184,500 for 2026. 5General Court of Massachusetts. Massachusetts Code Chapter 175M Section 6 – Family and Medical Leave
If your company already offers paid leave that meets or exceeds the state program’s standards, you can apply through MassTaxConnect for a private plan exemption. The plan must cover all employees regardless of hours, match or beat the state’s benefit amounts, include job protection, and cost employees no more than they would pay under the state program. Even with the exemption, you still need to display PFML workplace posters and give employees written notice of their leave rights. 6Mass.gov. Benefit Requirements for Private Paid Leave Plan Exemptions
Workforce Training Fund
The Workforce Training Fund, authorized by M.G.L. c. 151A, § 14L, is collected alongside your unemployment insurance payments. 7Massachusetts General Laws. Massachusetts General Laws c. 151A – Unemployment Insurance The per-employee amount is modest, and the fund later provides grants you can draw on to offset training costs for current and newly hired workers.
State Income Tax Withholding
Under M.G.L. c. 62B, you must withhold state income tax from every Massachusetts worker’s wages based on their earnings and claimed exemptions. 8General Court of Massachusetts. Massachusetts General Laws Chapter 62B – Withholding of Taxes on Wages and Declaration of Estimated Income Tax The base personal income tax rate is 5%. 9Mass.gov. Massachusetts Tax Rates Each employee files Form M-4 showing the number of exemptions they claim, which reduces taxable wages before you apply the rate.
Massachusetts also imposes a 4% surtax on individual taxable income above an annually adjusted threshold. For tax year 2025 the threshold is $1,083,150, with the 2026 figure updated for inflation. The surtax matters for withholding because supplemental payments like bonuses can push an employee’s annualized income above the threshold, in which case the supplemental payment may require 9% withholding rather than 5%. Circular M from the Department of Revenue walks through the method. 10Mass.gov. Massachusetts 4% Surtax on Taxable Income
Federal Taxes Stacked On Top
Every Massachusetts employer also owes federal FICA. For 2026, the employer’s share is 7.65% of wages: 6.2% for Social Security on the first $184,500 per employee, plus 1.45% for Medicare on all wages with no cap. 11Internal Revenue Service. 2026 Publication 926 Employees pay a matching 7.65%, which you withhold. An additional 0.9% Medicare tax applies to employee wages above $200,000, but that portion is employee-only, with no employer match.
FUTA sits on top of that. The nominal rate is 6.0% on the first $7,000 of each employee’s wages, but Massachusetts employers who pay their state unemployment taxes on time earn a 5.4% credit, dropping the effective FUTA rate to 0.6%, or a maximum of $42 per employee per year. Missing state UI deadlines can jeopardize the credit and multiply your FUTA bill.
Who Counts as an Employee
Every rate above assumes you have employees, and Massachusetts uses one of the strictest classification tests in the country to decide who qualifies. Under M.G.L. c. 149, § 148B, every worker is presumed to be an employee unless you can prove all three of the following: 12General Court of Massachusetts. Massachusetts Code Chapter 149 Section 148B – Independent Contractor Classification
- The worker is free from your direction and control, both under the contract and in practice.
- The service is performed outside the usual course of your business.
- The worker is customarily engaged in an independently established trade, occupation, or business of the same nature.
Fail any single prong and the worker is legally an employee for Massachusetts purposes. Misclassification exposes you to back taxes, unemployment and workers’ compensation contributions, and liability under the Massachusetts Wage Act, which mandates triple damages for wage violations with no good-faith defense. Willful violations can carry criminal penalties.
The federal test is softer: the IRS weighs behavioral control, financial control, and the type of relationship, with no single factor decisive. 13Internal Revenue Service. Independent Contractor (Self-Employed) or Employee Clearing the federal bar does not clear the Massachusetts bar. A worker who qualifies as an independent contractor for the IRS can still be an employee under the state ABC test.
Registering and Setting Up Payroll
Before you run a first payroll, get a Federal Employer Identification Number from the IRS. 14Internal Revenue Service. Get an Employer Identification Number Then register your business through MassTaxConnect, the Department of Revenue’s portal for managing state tax accounts, filing returns, and making payments. 15Mass.gov. Register Your Business with MassTaxConnect
For each employee, collect their full name, Social Security number, and residency status, and have them complete Form M-4. The number of exemptions on that form drives how much state income tax you deduct. Keep M-4s current. When an employee marries, adds a dependent, or picks up a second job, the form should be updated.
You also need to report new hires and returning employees within 14 days of their start date, regardless of company size. The requirement extends to independent contractors who will be paid $600 or more during the year, retired employees returning to work, and workers filing workers’ compensation claims. 16Mass.gov. Learn About the New Hire Reporting Program Quarterly wage reports don’t satisfy this obligation on their own; use the state’s dedicated New Hire Reporting Form.
When to File and Pay
Your Massachusetts withholding filing frequency depends on how much tax you withhold annually across all employees: 17Mass.gov. Withholding Taxes on Wages
- $100 or less per year: file and pay annually by January 31 of the following year.
- $101 to $1,200: file and pay quarterly, due by the last day of the month after each quarter ends (April 30, July 31, October 31, January 31).
- $1,201 to $25,000: file quarterly, but pay monthly by the 15th of the following month. Quarter-end months (March, June, September, December) get an extension to the last day of the next month.
- More than $25,000: file quarterly, but deposit withheld taxes within three business days whenever accumulated withholding reaches $500 during a pay period.
PFML contributions follow a quarterly schedule regardless of employer size, with returns due by the last day of the month after each quarter closes. 18Mass.gov. Massachusetts DOR Tax Due Dates and Extensions Unemployment insurance and EMAC payments are also quarterly. All filings go through MassTaxConnect, and the portal generates confirmation receipts worth keeping.
What Noncompliance Costs
Late filing and late payment each carry a penalty of 1% of the unpaid tax per month, capped at 25%, and the two stack. 19Mass.gov. Massachusetts Penalties and Interest Assessed by DOR An employer who both files and pays late can face up to 2% per month on the amount owed. Failing to file or pay electronically when required adds up to $100 per occurrence. Depository filers who miss required deposits owe an additional 5% of the underpayment.
Failing to withhold, file returns, or remit withheld taxes carries fines between $100 and $5,000, imprisonment of up to one year, or both. Failure to file wage reports can cost up to $25 per employee, rising to $500 per employee when the failure results from a deliberate agreement between employer and worker not to report. Interest runs on top of all penalties from the original due date.
Federal law requires you to keep employment tax records for at least four years after the tax becomes due or is paid, whichever is later. 20Internal Revenue Service. Topic No. 305, Recordkeeping That covers completed M-4s, wage records, quarterly filings, MassTaxConnect deposit confirmations, and any documentation supporting your worker classification decisions. Because Massachusetts misclassification claims can surface years later and carry triple damages, holding records past the four-year federal minimum is a reasonable precaution.