Massachusetts 4-Day Work Week: Overtime, Breaks, and Wage Act

Massachusetts has no law requiring or prohibiting a four-day work week, so an employer can adopt one voluntarily — but the switch still has to clear existing state and federal rules on overtime, wage payment, benefits eligibility, meal breaks, and (for union shops) collective bargaining. Massachusetts also imposes mandatory treble damages for wage violations, which makes payroll accuracy during the transition the single biggest legal risk. A bill to create a state pilot program, S.1330, was introduced in the 2025–2026 session and sent to a study order in December 2025, so no state-sponsored program exists.¹

Compressed Hours or Reduced Hours? Pick First

Almost every compliance question depends on which four-day model you’re running. A compressed schedule keeps the total at 40 hours by stretching each day to 10. A reduced schedule cuts the week to roughly 32 hours by eliminating a full day of work.

A 4 × 10 compressed week avoids overtime because employees still hit exactly 40 hours. A 4 × 8 reduced week also avoids overtime, but hourly workers earn less unless you raise their rate. Salaried exempt employees can usually move to either model without a pay change. Hourly and non-exempt workers need a careful compensation review under both.

Overtime and Minimum Wage

The Fair Labor Standards Act requires non-exempt workers to receive one and a half times their regular rate for every hour past 40 in a single workweek.² Massachusetts mirrors that trigger under Chapter 151, Section 1A.³ Neither law counts days. If a compressed 10-hour day slips to 10.5 and nobody catches it, you owe overtime on that half hour. Employees cannot waive the right to overtime; any agreement to do so is void.⁴

Massachusetts’ minimum wage is $15.00 per hour and has been since January 1, 2023, with no further increases scheduled.⁵ If you reduce hours and keep pay the same in dollar terms, the effective hourly rate goes up, which is fine. If you reduce hours and let gross pay fall, confirm the hourly rate still clears $15.00. One peripheral note for retail employers: Sunday and holiday premium pay was fully phased out as of January 1, 2023, so a four-day week that includes a Sunday no longer carries an extra wage obligation.⁶

Exempt Salaried Employees

Executive, administrative, and professional employees who meet the federal white-collar exemption are not entitled to overtime, which gives employers more room to restructure. The exemption requires salary-basis pay, specific duties, and a minimum weekly salary.⁷

A federal court in Texas vacated the Department of Labor’s 2024 attempt to raise the threshold, so the DOL is enforcing the 2019 figure of $684 per week, or $35,568 per year.⁸ You can move an exempt employee to a four-day schedule, but if you cut the salary below the threshold to match the hour reduction, the exemption is lost and overtime kicks in for any week over 40 hours.

The Wage Act Is Where the Money Is

Chapter 149, Section 148 controls when wages must be paid. Employees who work five or six days a week must be paid within six days after the end of the pay period; seven-day workers get seven days; employees working fewer than five days — labeled “casual employees” in the statute — must be paid within seven days after the work period ends.⁹ For a regular four-day workforce, the safer reading is to run weekly or biweekly payroll that complies with the six-day rule. A discharged employee must be paid in full on the day of discharge regardless of schedule.

Here is the piece most employers underestimate. Section 150 makes damages for a successful wage claim mandatory treble damages, plus attorney’s fees and costs.¹⁰ A $5,000 payroll shortfall becomes a $15,000 judgment before fees. There is no good-faith exception. When you restructure pay around a new schedule, getting the arithmetic exactly right is the single most important compliance task.

Meal Breaks on a 10-Hour Day

Chapter 149, Section 100 requires a 30-minute meal period during any shift longer than six hours, and the requirement cannot be waived by agreement. On a 10-hour compressed day, one 30-minute break still meets the statutory floor. Whether a single break is enough as a practical matter is a different question. Additional breaks are not legally required, but they reduce fatigue-related errors and have no legal downside.

Benefits Eligibility Can Shift Without Warning

A reduced-hours schedule can push employees across benefit thresholds in ways nobody intended.

Under the Affordable Care Act, applicable large employers must offer coverage to employees who average at least 30 hours per week or 130 hours per month.¹¹

Paid Family and Medical Leave contributions are calculated on wages paid, not hours worked. For 2026 the rate is 0.88% of eligible wages for employers with 25 or more covered individuals.¹³ A compressed schedule with unchanged pay doesn’t change PFML contributions. A reduced-hours model that lowers total wages also lowers the eventual benefit amount, because PFML benefits are based on average weekly wages. Workers should hear that trade-off before you implement.

Earned sick time is capped at 40 hours per calendar year, paid for employers with 11 or more employees and unpaid for smaller ones.¹⁴ The cap is a flat hour figure, not a day figure. A sick day on a 10-hour schedule consumes 10 of the 40 hours, leaving four sick days instead of five. Update your written policies so the conversion is explicit, and make sure nothing in the revised policy drops below the statutory floor.

Discrimination Risk When Some Workers Can’t Do 10-Hour Days

Chapter 151B prohibits discrimination in the terms and conditions of employment based on protected characteristics including race, sex, religion, disability, and age.¹⁵ If a compressed schedule requires 10-hour days and certain employees cannot work them — parents of young children, employees with disabilities, workers who observe a Sabbath — denying accommodations or quietly pushing them off the schedule can generate a claim. Treat the change as a workplace policy update, invite input from affected employees, document accommodation requests, and document your responses.

Unionized Workplaces: Bargain First

Work hours are a mandatory subject of bargaining under the National Labor Relations Act. Employer and union both have a legal duty to negotiate in good faith over wages, hours, and other conditions of employment before any change is implemented.¹⁶ Announcing a four-day week unilaterally — or rolling it out before bargaining concludes — is an unfair labor practice regardless of how popular the change is with workers.

If a current collective bargaining agreement defines the workday as eight hours or the week as five days, the employer typically has to wait until the contract reopens or secure the union’s consent to a mid-term modification. The statute requires 60 days’ written notice to modify an existing contract, with offers to meet and confer and notification to the Federal Mediation and Conciliation Service if no agreement is reached within 30 days.

Safety, Fatigue, and Industries With Hour Caps

Research affiliated with the National Institute for Occupational Safety and Health found that 10-hour shifts carry about a 13% higher risk of workplace injuries and errors than 8-hour shifts, with night and evening shifts raising risk further (28% and 15% respectively compared to day shifts).¹⁷ OSHA does not cap shift length for most industries, but employers still carry a general duty to maintain a safe workplace. If injury rates climb after the switch, the general duty clause is in play.

Some workers face regulatory ceilings that make compressed schedules difficult or impossible. Commercial motor vehicle operators are subject to Department of Transportation hours-of-service rules under 49 CFR 395, which cap driving at 11 hours after 10 consecutive hours off duty and limit the total on-duty window to 14 hours.¹⁸ A 10-hour shift that also includes loading or inspections can easily bump against those limits. Check industry-specific hour rules before building a compressed schedule around them.

Document the Change

Put the transition in writing. For at-will employees, update offer letters or employment agreements to reflect the new schedule, any hourly rate adjustments, and any changes to benefits accrual. For contract employees, you may need a formal amendment signed by both parties. In unionized workplaces, changes go through the bargaining process.

Then work through the employee handbook. Attendance policies, PTO accrual formulas, holiday pay, and performance review timelines often assume a five-day week. A sick day policy that grants “one day” of leave means 8 hours on an 8-hour schedule and 10 hours on a 10-hour schedule, and that ambiguity is exactly where Wage Act claims come from. Spell out the conversion in the written policy, get signed acknowledgments, and keep the records. With Section 150 treble damages on the table, the paper trail is your first line of defense.¹⁰

1
General Court of Massachusetts. Bill S.1330 – An Act Relative to a Four-Day Work Week Pilot Program
2
eCFR. 29 CFR Part 778 – Overtime Compensation
3
General Court of Massachusetts. Massachusetts General Laws Chapter 151 Section 1A – Overtime Pay
4
Mass.gov. Minimum Wage and Overtime Information
5
General Court of Massachusetts. Massachusetts General Laws Chapter 151 Section 1 – Minimum Wage
6
Mass.gov. Working on Sundays and Holidays – Blue Laws
7
eCFR. 29 CFR Part 541 – Defining and Delimiting the Exemptions for Executive, Administrative, Professional, Computer and Outside Sales Employees
8
U.S. Department of Labor. Earnings Thresholds for the Executive, Administrative, and Professional Employees
9
General Court of Massachusetts. Massachusetts General Laws Chapter 149 Section 148 – Payment of Wages
10
General Court of Massachusetts. Massachusetts General Laws Chapter 149 Section 150
11
Internal Revenue Service. 29 U.S. Code 1052 – Minimum Participation Standards
13
Mass.gov. Paid Family and Medical Leave Employer Contribution Rates and Calculator
14
General Court of Massachusetts. Massachusetts General Laws Chapter 149 Section 148C – Earned Sick Time
15
Cornell Law School. 804 CMR 3.01 – Employment Discrimination Guidelines
16
Office of the Law Revision Counsel. 29 U.S.C. 158 – Unfair Labor Practices
17
Centers for Disease Control and Prevention. Shiftwork, Long Work Hours, Fatigue
18
FMCSA. Hours of Service