Mass Payroll: Massachusetts Employer Tax Guide

Massachusetts is often described as an easy payroll state because the income tax is flat and there are no municipal taxes. That description holds for about one paycheck. Then you file the first quarterly return with the Department of Unemployment Assistance and discover that what looked like one unemployment tax is actually four separate charges, one of which does not apply yet and will start applying in your fourth year.

The rest follows the same pattern. The flat 5 percent income tax carries a 4 percent surtax above a threshold that moves every year. The paid leave program has a rate that has been stable since 2024 and a contribution structure that changes in 2027. And the wage rules end with a final paycheck requirement that has no grace period at all: discharge someone on a Tuesday and the money is due on Tuesday, with treble damages if it is not.

This guide covers what Massachusetts requires from private employers as of July 2026, the thresholds that step up as you grow, and how 10 payroll providers price the work at 10, 25, and 50 employees.

Looking for the Massachusetts state payroll database?

Worth clearing up first, because these search terms return two completely different things and most of the results serve the other audience.

Massachusetts publishes state employee salaries as public records. CTHRU, the Commonwealth's statewide transparency portal operated by the Office of the Comptroller, lets anyone look up what individual state employees earn, and several news organizations and third-party aggregators republish that data as searchable databases of the highest-paid state employees. Those tools exist for state workers checking their own records, journalists, and residents. None of them is a payroll system, and no private business can use them to pay anyone.

If that is what you were after, the Comptroller's transparency site is the right destination and this page will not help. Everything below is for the other audience: private employers who need to pay staff in Massachusetts, register for state accounts, handle the assessments and the leave program, and choose payroll software.

What Massachusetts requires from employers

Three agencies touch payroll here, and unlike some states none of the registrations is combined.

The unemployment trigger is worth reading carefully because it is low. A private for-profit employer becomes subject after employing someone for any part of a day in 13 weeks during a calendar year, or after paying $1,500 in wages in a calendar year. Seasonal and part-time operations cross it faster than they expect.

The last row is an obligation without a filing, which is why it gets missed. Every new hire must receive written notice of their Paid Family and Medical Leave rights within 30 days, and the employer must obtain a signed acknowledgment or document the refusal. It is an onboarding paperwork task rather than a payroll task, and it is one of the more commonly overlooked requirements in the state.

Withholding, the flat rate, and the surtax that sits on top

Massachusetts withholds a flat 5 percent on wages. There is no municipal or county income tax anywhere in the state, which genuinely does make it simpler than Maryland, Ohio, or Pennsylvania.

What sits above it is the 4 percent surtax created by the constitutional amendment voters approved in 2022. It first applied in tax year 2023 at a $1,000,000 threshold and is indexed annually. Per the Massachusetts Department of Revenue, the threshold is $1,107,750 for tax year 2026, making the effective rate on income above it 9 percent.

For most small employers the surtax is theoretical. Where it becomes real is equity compensation and bonuses: a single large restricted stock vesting or a deferred compensation payout can push an otherwise ordinary salary past the threshold in one pay period. The Department of Revenue has updated the Circular M percentage method tables to build the surtax in, so employers using the published tables or compliant payroll software do not compute it separately.

Form M-4 and where the wages are earned

Massachusetts does not accept the federal Form W-4 in place of its own. Form M-4, the Employee's Withholding Exemption Certificate, records personal exemptions, and each exemption reduces annualized wages before the 5 percent rate applies. It has to be collected at hire alongside the federal W-4 and the I-9.

Four assessments hiding inside one unemployment filing

This is the part of Massachusetts payroll that surprises employers arriving from other states. What is described as unemployment tax is a quarterly Employment and Wage Detail Report to the Department of Unemployment Assistance that carries four distinct charges, all calculated on the same $15,000 taxable wage base.

The practical consequence is that the published unemployment rate understates what you pay. According to the state rate tables, including the COVID-19 Recovery Assessment brings the effective 2026 range for experience-rated employers to roughly 1.118 percent through 17.086 percent. The new employer rate is 2.42 percent before assessments.

The saving grace is the wage base. Massachusetts caps unemployment-taxable wages at the first $15,000 per employee per year, which is low by national standards. Even a badly experience-rated employer at the top of the range is bounded in absolute dollars, and a typical positive-rated small employer lands in the low hundreds per employee annually. Our guides to state unemployment tax and how SUTA works cover the mechanics of experience rating.

Paid family and medical leave and the 25-person cliff

Massachusetts runs one of the more mature state paid leave programs, enacted in 2018 and fully operational since 2021. The rate has been stable since 2024. The structure around it is where the cost decisions sit.

The 25-covered-individual line is a genuine cost cliff rather than a gradual slope. Below it, an employer may fund the entire contribution from employee wages and owes nothing itself. At or above it, the employer must pay at least 0.42 percent of eligible wages out of its own pocket. On a $1.5 million payroll that is about $6,300 a year that did not exist the day before the twenty-fifth hire.

Two definitional details make the count trickier than a headcount. Covered individuals can include 1099-MISC contractors performing services in Massachusetts, not only W-2 employees. And out-of-state employers with even one Massachusetts employee are within the program, so a company headquartered elsewhere with a single remote hire in Boston has a registration and contribution obligation.

Employers may apply to the Department of Family and Medical Leave for approval to use an equivalent private plan instead of the state program, which exempts them from remitting contributions to the Commonwealth. Private plans must match or exceed state benefits, including the current maximum weekly benefit.

Wage rules, pay frequency, and the same-day final paycheck

The minimum wage is straightforward. Everything around termination is not.

The tipped reconciliation deserves a note because it is stricter than the federal rule. If cash wages plus tips fall short of $15.00 for a given shift, the employer covers the difference for that shift rather than averaging across the pay period. A restaurant with variable tip nights is doing this calculation continuously, which is why point-of-sale integration matters more here than in states that permit weekly averaging.

The final paycheck rule

Massachusetts splits the timing by who ended the employment, and the involuntary side has no grace period at all.

Accrued vacation counts as wages in Massachusetts and is payable on separation. The enforcement mechanism is what makes the timing consequential: the Wage Act provides mandatory treble damages plus attorney fees for late or unpaid wages, and the trebling is not left to a judge's discretion. A late final paycheck is not a small administrative problem here.

Pay transparency

Since October 29, 2025, employers with 25 or more employees must include a pay range in every job posting and provide the range for a current role on request. Employers with 100 or more file annual wage and workforce demographic data with the state. Note that this 25-employee threshold is a headcount and is not the same test as the 25-covered-individual threshold for paid leave, even though the numbers match. Our guide to pay transparency laws covers how the states compare.

10 payroll providers for Massachusetts employers compared

Every provider below files Massachusetts withholding and the quarterly unemployment return. The differences that matter here are whether the platform calculates the paid leave split correctly at the 25-covered-individual threshold, whether it handles all four assessments inside the DUA filing, and whether it can produce a same-day payment for a termination.

OnPay

One plan at $49 per month plus $6 per employee, with every feature included and no tiers. Tax filing covers all 50 states with no multi-state surcharge, and year-end forms sit in the base price. For a Massachusetts employer with staff commuting from New Hampshire or Rhode Island, which describes a large share of employers north and south of Boston, that structure removes the most common billing surprise.

Patriot Software

The cheapest legitimate full-service payroll available, at $37 per month plus $5 per employee including federal and state tax filing. For a single-state Massachusetts employer with salaried staff, this is the honest value answer, and unlimited payroll runs with no per-run fee matters given the weekly or biweekly pay frequency requirement for hourly workers.

Additional states cost $12 per month each. The bigger caution for Massachusetts is deposit speed: standard direct deposit runs two to four business days, which cannot satisfy a same-day termination obligation without cutting a paper check.

Gusto

The most common first payroll purchase for US small businesses. Tax filing is automatic, the interface is pleasant, and pricing is published. Simple runs $49 per month plus $6 per employee after a base increase in March 2026.

The constraint for Massachusetts employers is geographic. Simple covers single-state payroll only, and Massachusetts borders five states with heavy cross-border commuting, particularly from New Hampshire where there is no income tax. One hire across any of those lines moves you to Plus at $80 plus $12 per employee.

Paychex Flex

Competes on service rather than software, with named representatives at higher tiers and a large in-house compliance team. Flex Essentials is published at $39 per month plus $5 per employee for businesses under 20 people; everything above is quote-only. Its published Massachusetts compliance material is unusually detailed, which is a reasonable proxy for how the platform handles the assessments.

ADP RUN

The deepest tax compliance engine in the category. For a Massachusetts employer the practical argument is the assessment layer: four charges in one filing, an EMAC rate that steps by tenure, a paid leave split that changes at 25 covered individuals and restructures in 2027, and a surtax threshold that moves annually. Those reach ADP tables without anyone at your company tracking Beacon Hill.

The cost is opacity. ADP does not publish RUN pricing; third-party estimates put Essential near $79 per month plus $4 per employee. Contracts typically run a year with automatic renewal and a 30 to 60 day cancellation window.

QuickBooks Workforce Payroll

Formerly QuickBooks Payroll, renamed in July 2026. Core is $50 per month plus $6.50 per employee. The reason to pick it is unchanged: if your books already live in QuickBooks Online, payroll entries reach the general ledger without an export step. Same-day deposit on higher tiers is worth weighing here specifically because of the discharge rule.

Square Payroll

At $35 per month plus $6 per person, the lowest published base fee among full-service providers. The reason to choose it in Massachusetts is the tipped reconciliation: Square imports tips recorded at the point of sale and applies them through payroll, which matters more here than in most states because the shortfall has to be made up shift by shift rather than averaged.

SurePayroll

Owned by Paychex and aimed at very small employers and household employers, a substantial category in the Boston suburbs. Full Service is $29 per month plus $7 per employee, with a flat $9.99 monthly multi-state fee regardless of how many states, which suits an employer with a few staff across the New Hampshire line.

Homebase Payroll

Scheduling and time tracking first, payroll added on. For Massachusetts employers running hourly staff, the time tracking side does real compliance work: it records shift boundaries, which is what the 30-minute meal break rule and the shift-level tip reconciliation both depend on.

Wave Payroll

On this list because Wave's accounting software is genuinely free. Payroll is $40 per month plus $6 per employee, and since April 2025 a single tier includes automatic tax filing in all 50 states. For a micro business wanting books and payroll from one vendor at the lowest total cost, the combination is hard to beat.

What each provider actually costs a Massachusetts employer

The table below models published rates at three headcounts, plus what a second state costs. That column matters here because Massachusetts borders five states and the New Hampshire commuting pattern in particular is routine rather than exceptional.

Two patterns stand out. Patriot stays cheapest at every headcount, and at 50 employees it costs less than several competitors do at 25. But the second-state column reorders things: Gusto Simple is competitive until one hire in New Hampshire or Rhode Island forces the Plus tier, at which point a 25-person payroll goes from $199 to $380 per month.

Software price is also a minority of the Massachusetts number. Unemployment plus three assessments on the first $15,000, the employer share of paid leave above 25 covered individuals, and workers compensation premiums are statutory costs no provider changes. At 25 employees the paid leave employer contribution alone can exceed the entire annual software bill.

Choosing a payroll provider for Massachusetts

Four questions separate providers that will work here from providers that will quietly generate correction notices.

One item sits outside the payroll engine entirely. Every Massachusetts new hire needs a federal I-9 and W-4, a state Form M-4, a new hire report within 14 days, and a written Paid Family and Medical Leave notice with a signed acknowledgment within 30 days. Our guide to tax forms for new employees covers the federal side, and the Massachusetts HR compliance guide covers the surrounding employment law.

Before you choose

FirstHR does not process payroll, file payroll taxes, or administer benefits. Every provider above does something we do not, and if running payroll is the problem in front of you, one of them is the answer.

What we handle is the layer that feeds payroll: onboarding workflows, e-signatures on I-9s and offer letters, employee records, and document management for 5 to 50 employee US teams at a flat $98 to $198 per month. Massachusetts gives that layer specific work to do. The M-4 is a separate form from the federal W-4 and has to be collected at hire. The paid leave notice requires a signed acknowledgment within 30 days and is an onboarding document rather than a payroll transaction. And the same-day discharge rule means the records showing what someone was owed, including accrued vacation, need to be findable on the day rather than reconstructed later. If the recurring problem is that paperwork arrives late and nobody is certain what a given employee signed, that is a document collection failure rather than a payroll processing failure, and it is the kind of gap we built for.

Frequently Asked Questions

Is the Massachusetts statewide payroll database the same as running payroll?

No. Searches for Massachusetts state payroll usually return CTHRU, the Comptroller's statewide transparency portal, along with news salary databases and third-party aggregators. Those tools let people look up public-sector salaries, which are public records. None is a payroll system. A private employer paying staff in Massachusetts needs commercial payroll software or a payroll service instead.

How do I register a business for Massachusetts payroll taxes?

Two separate registrations. Income tax withholding goes through the Department of Revenue via MassTaxConnect, and unemployment insurance goes through the Department of Unemployment Assistance, which assigns your contribution rate. A federal EIN is required for both. Paid leave is administered by a third agency, and workers compensation coverage is obtained separately through a carrier.

What is the Massachusetts income tax withholding rate?

A flat 5 percent on wages, with an additional 4 percent surtax on income above $1,107,750 for tax year 2026, making the effective rate on the excess 9 percent. The threshold adjusts annually for inflation and first applied in tax year 2023 at $1,000,000. Massachusetts has no local or municipal income tax.

What is Form M-4 and do employees have to file one?

Form M-4 is the Massachusetts withholding exemption certificate, recording personal exemptions that reduce annualized wages before the 5 percent rate applies. Massachusetts does not accept the federal W-4 in its place, so it must be collected separately at hire. Wages for hybrid staff are sourced by the ratio of workdays physically performed in Massachusetts.

What is the Massachusetts PFML contribution rate for 2026?

0.88 percent of eligible wages for employers with 25 or more covered individuals and 0.46 percent for smaller employers. Above 25, the employer funds at least 0.42 percent and the employee no more than 0.46 percent. Contributions are capped at the Social Security taxable maximum, and the maximum weekly benefit is $1,230.39.

Who counts as a covered individual for the 25-employee PFML threshold?

Both employees and, in certain circumstances, 1099-MISC contractors performing services in Massachusetts. Crossing from 24 to 25 changes the obligation materially, since below the line an employer owes no employer contribution and above it must fund at least 0.42 percent of eligible wages. Out-of-state employers with one Massachusetts employee are also covered.

What are Massachusetts unemployment insurance rates for 2026?

Schedule E rates run 0.94 to 5.24 percent for positive-rated employers and 7.03 to 14.37 percent for negative-rated employers, with a new employer rate of 2.42 percent. Adding the COVID-19 Recovery Assessment brings the effective range to roughly 1.118 through 17.086 percent. The taxable wage base is the first $15,000 per employee per year.

What is the EMAC tax in Massachusetts?

The Employer Medical Assistance Contribution, paid by employers with six or more employees on the first $15,000 of wages to fund state health insurance programs. It phases in by tenure: generally exempt for about three years, then 0.12 percent, 0.24 percent, and 0.34 percent from roughly the sixth year onward. It is calculated from the same quarterly wage detail report as unemployment tax.

What is the Massachusetts minimum wage in 2026?

$15.00 per hour statewide, unchanged since January 1, 2023, with no local rates and no scheduled increase. The tipped service rate is $6.75 with a maximum tip credit of $8.25, and any shortfall must be made up at the end of each shift rather than averaged over the pay period. See our guide to the tipped minimum wage for how the credit works.

When is a final paycheck due in Massachusetts?

On the day of termination for a discharge or layoff, and on the next regular payday for a voluntary resignation. Accrued unused vacation counts as wages and is payable either way. The Wage Act provides mandatory treble damages plus attorney fees for late payment, so the timing carries unusual financial weight.

How much does payroll software cost for a Massachusetts small business?

At 10 employees, published July 2026 rates run roughly $87 for Patriot Full Service, $89 for Paychex Essentials, $95 for Square, $99 for SurePayroll, $109 for OnPay or Gusto Simple, and $115 for QuickBooks Core. At 50 employees the same plans land between about $287 and $379. ADP does not publish RUN pricing.

Does Massachusetts require paid sick leave and pay transparency?

Both, at different thresholds. Earned sick time accrues at one hour per 30 worked up to 40 hours a year, paid at 11 or more employees and unpaid below. Pay ranges must appear in job postings for employers with 25 or more employees, and those with 100 or more file annual wage and demographic data with the state.