Massachusetts is one of the more regulated states for the trades. You need a state contractor license to take work on, and the income tax runs up to 9%, so both your paperwork and your tax bill are heavier here than average. Knowing the rules is the difference between a healthy margin and a nasty surprise.
Each section below points to a tool that runs your exact numbers for Massachusetts.
Tax in Massachusetts
Massachusetts has a graduated state income tax that runs up to 9% at the top, on top of your federal taxes. Graduated means the rate climbs as your profit does, so a good year costs proportionally more. You owe federal income tax and self-employment tax as well, and you make estimated payments to both Massachusetts and the IRS through the year.
On sales tax, Massachusetts follows the usual rule for the trades: your labor is not taxed, and you pay sales tax on your materials when you buy them rather than charging it to the customer. Installed TPP may be taxable.
Work out what to hold back on the Tax Set-Aside Calculator, which runs the federal and self-employment numbers for Massachusetts.
Getting paid: liens and retainage
A mechanic's lien is the tool that actually gets a Massachusetts contractor paid, and in Massachusetts you generally have to record it within 120 days of the last day labor or materials were furnished to the project. Miss it and you lose the lien, so the dates matter.
Enforcing it has its own clock. 90 days from filing the Statement of Account to commence a civil action, or the lien is dissolved (254:11). Nobody can force you to move sooner - Massachusetts has no demand-to-commence provision in c.254. Work out your dates on the Lien Deadline tool, and if they are close, get an attorney to confirm them against the statute (M.G.L. c.254 ss.2, 2A, 2B, 4, 8, 11).
On money held back as retainage, this is our plain-English summary for Massachusetts. NOT VERIFIED. No citation on this row at all: it is carried from the June 2026 spine reconciliation and has never been read against a Massachusetts statute here. Two bare percentages, and an approximate 65 days on public work with no trigger and no section behind it.
- Private work: 5%.
- Public work: 5%.
- Release (unconfirmed): 30 days on private work, about 65 days on public work.
Check the Retainage Calculator before you sign a contract that holds back more.
There is no Massachusetts retainage letter on this site, and the NOT VERIFIED line above is why. A letter that tells the party holding your money what to hand over only gets written over a row that has been read against the statute in full. The Massachusetts forms below are a different thing: they are the statute's own waiver wording, reproduced, and do not rest on the retainage row.
Free Massachusetts lien waiver forms
Massachusetts sets out the wording of a lien waiver in its own statute. These are reproduced from it rather than reworded, because the wording is the part that carries the legal effect. What a signature costs you differs from state to state, and not every state makes a waiver that departs from the form unenforceable, so read the notes on the form itself before you sign one.
- Massachusetts: Partial Waiver and Subordination of Lien, for when a partial release is asked for part way through the job
Do you need a license in Massachusetts?
Massachusetts requires a state contractor license to take building work on. The threshold that triggers it: Home Improvement registration is required REGARDLESS of job size. The $1,000 figure gates only the WRITTEN-CONTRACT duty, and applies above $1,000. Working unlicensed when your job needs a license is the expensive mistake here. The Construction Supervisor License is a PHYSICAL test, not a dollar one: buildings under 35,000 cubic feet, one- and two-family dwellings IRRESPECTIVE OF SIZE, agricultural buildings, and retaining walls under 10 feet. 780 CMR moved to its 10th edition, sole code in effect from 1 July 2025. The license comes from OCABR (HIC) / OPSID (CSL). Massachusetts accepts the NASCLA commercial exam, useful if you work across state lines.
Trade licenses for electrical, plumbing and HVAC are usually separate and often required even where a GC license is not. See what applies to your trade on the Contractor License Checker.
Building codes and permits
Massachusetts adopts its building codes statewide, so the rules travel with you across the state. Editions still move, so confirm yours with the building department before you price a job.
- Homes: 2021 (published as the Tenth Edition of 780 CMR; sole edition since 1 July 2025)
- Electrical: 2026 (527 CMR 12.00, effective 24 April 2026, for permits granted on or after 1 April 2026)
- Energy: 2021 base, mandatory statewide, plus an optional Stretch and Specialized overlay a town must vote to adopt
- Plumbing: 248 CMR 10.00, the Uniform State Plumbing Code (effective 8 December 2023)
Massachusetts numbers its building code by edition rather than year, so the Tenth Edition carries the 2021 I-Codes and the residential provisions sit in chapter 51 rather than a separate book. No municipality may opt out of, weaken or substitute an edition of the building, electrical or plumbing codes; only the Board of Building Regulations and Standards can grant relief, through its appeals board. Energy is the exception: the base binds everywhere and a town may vote to add the stricter Stretch or Specialized code on top. Electrical applicability runs from the date the electrical permit is granted, not the building permit.
Source: 780 CMR Tenth Edition, Board of Building Regulations and Standards under M.G.L. c.143; 527 CMR 12.00, Board of Fire Prevention Regulations; 225 CMR 22.00 and 23.00, Department of Energy Resources; 248 CMR 10.00, Board of State Examiners of Plumbers and Gas Fitters. Read against that source on 2026-08-25.
Check a specific job on the permit tool.
Pay and workers' comp
The minimum wage in Massachusetts is $15.00 an hour. That is the floor for anyone you put on the books, and it is worth confirming against the state labor department each year because several states step their rate mid-year. Check a rate on the minimum-wage tool.
Workers' comp rates in Massachusetts are not published as a single figure; they turn on your trade's class code and your payroll. Get a realistic range on the Workers' Comp Estimator, then get a real quote.
If a client will not pay
If a client will not pay, you can sue for up to $7,000 in Massachusetts's Small Claims (District Court). That covers most unpaid-invoice disputes for a small outfit; a bigger claim goes to regular civil court where you will probably want an attorney. Walk through whether filing is worth it on the Small Claims checker.
The clock runs the other way too: a client generally has 6 years to sue you over the work under a written contract in Massachusetts, with an absolute cutoff 6 years after the job is substantially complete. Work out your exposure on the Warranty & Claim Deadline tool.
Common questions
How much state income tax will I pay in Massachusetts?
Massachusetts has a graduated rate up to 9% state income tax on your profit, on top of federal income tax and self-employment tax. Use the Tax Set-Aside Calculator to see what to hold back.
Do I need a contractor's license in Massachusetts?
Yes. Massachusetts requires a state contractor license. The threshold: Home Improvement registration is required REGARDLESS of job size. The $1,000 figure gates only the WRITTEN-CONTRACT duty, and applies above $1,000. It is issued by OCABR (HIC) / OPSID (CSL).
What is the small claims limit in Massachusetts?
You can sue for up to $7,000 in Massachusetts's Small Claims (District Court). The filing fee is typically $40 to $150. Larger claims go to regular civil court.
How long do I have to file a mechanic's lien in Massachusetts?
Generally 120 days from the last day labor or materials were furnished to the project. Miss it and you lose the lien. Work your own dates out on the Lien Deadline tool.
Are there free Massachusetts contract and payment forms?
Yes. This page links 1 lien waiver forms reproduced from the Massachusetts statute rather than reworded. They are free, there is no sign-up, and you fill one in on screen and download it as a PDF or a Word file.
What is the minimum wage in Massachusetts?
$15.00 an hour in Massachusetts, above the federal $7.25. Several states step their rate mid-year, so confirm it before you set a payroll.
What building code does Massachusetts use?
Massachusetts adopts statewide. Homes: 2021 (published as the Tenth Edition of 780 CMR; sole edition since 1 July 2025). Electrical: 2026 (527 CMR 12.00, effective 24 April 2026, for permits granted on or after 1 April 2026). Editions move, so confirm yours with the building department before you price a job.
The honest bit
These are the 2026 rules for Massachusetts as they stood when this guide was written, and they change: legislatures move thresholds, deadlines and rates every year. Treat this as general guidance to point you in the right direction, not legal, tax or financial advice. Verify anything you rely on at the source (the IRS, the Massachusetts tax and licensing agencies, and your local building department) or with a professional. Where Massachusetts does something unusual, the detail is called out above rather than glossed over.
Related: Tax Set-Aside Calculator · Mechanic's Lien Deadline · Contractor License Checker · Small Claims checker · Working in Your State
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Sources
- Massachusetts contractor licensing authority · Massachusetts contractor licensing authority. Who must hold a contractor or trade license in Massachusetts, and the licensing instrument (G.L. c. 142A s.2)
- The 194th General Court of the Commonwealth of Massachusetts · Mechanics lien notice, filing and enforcement deadlines in Massachusetts: M.G.L. c.254 ss.2, 2A, 2B, 4, 8, 11. Verified against this authority on 2026-08-15.
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