Massachusetts LLC Taxes Explained: 5% Flat + the Surtax (2026)
Here's the Massachusetts plot twist: after the highest fees in America, its actual income tax is one of the simplest — a flat 5%, no county layers, no entity tax on default LLCs. The one wrinkle is the 4% "millionaire surtax" above roughly $1.08M. Here's every layer, with an estimator that runs all the way up to surtax territory.
A default Massachusetts LLC is a pass-through: profits land on your personal return at the flat 5% state rate, plus the 4% surtax on taxable income above ~$1.08 million (the inflation-indexed "Fair Share" threshold). Add 15.3% federal self-employment tax on 92.35% of net profit. The LLC itself owes no entity-level tax — the $500 annual report is the whole recurring bill (the corporate excise and its $456 minimum apply only to entities that elect corporate taxation). Sellers collect 6.25% sales tax. Around $60–80K profit, model an S-Corp election.
- State income tax
- 5% flat
- Surtax
- +4% above ~$1.08M
- Entity-level tax (default LLC)
- None
- Corporate excise (if elected)
- 8% + $456 min
- Sales tax
- 6.25% — no local rates
- S-Corp threshold
- ~$60–80K profit
The 4 Layers of Massachusetts LLC Taxation
Federal: income + self-employment tax
Pass-through profits hit your 1040 at your federal bracket, plus 15.3% SE tax on 92.35% of net profit — usually the biggest line.
Massachusetts income tax: flat 5%
One rate, no brackets, no county or city income taxes anywhere — the simplest state income tax in this series. The 4% surtax applies only above the ~$1.08M threshold.
Entity level: only the $500 report
No franchise tax, no entity income tax for default LLCs. The $500 annual report is the whole recurring state bill. (The 8% corporate excise with its $456 minimum applies only if you elect C-Corp taxation.)
Sales & meals tax: 6.25% (if applicable)
Collected from customers on taxable sales — one statewide rate, zero local sales taxes, clothing under $175 exempt. Meals run ~7% with the local option. See Step 7.
Estimate Your Combined Bill — All the Way to Surtax Territory
Massachusetts LLC Tax Estimator
Single-member default taxation · slides to $1.5M to show the surtax live · educational estimate
Models SE tax (15.3% on 92.35% of profit up to the Social Security wage base, 2.9%–3.8% Medicare above, simplified), the flat 5% Massachusetts rate after the employer-half SE deduction, and the 4% surtax on income above $1,080,000 (approximate 2026 indexed threshold). Excludes federal income tax, deductions, credits, and QBI. Educational only — confirm with a Massachusetts CPA.
The Millionaire Surtax, Explained
The 2023 "Fair Share Amendment" added 4 percentage points on annual taxable income above $1 million — indexed for inflation to roughly $1.08M for 2026. Three things founders get wrong about it: it's marginal (only dollars above the threshold pay 9%; everything below stays at 5%); it's per return, not per business — a big exit year, a property sale, and LLC profits stack toward the same threshold; and it's why Massachusetts CPAs now plan income timing around liquidity events — spreading a sale across tax years can keep both halves under the line. Below seven figures, it's simply not your problem.
The S-Corp Question (~$60–80K Profit)
An S-Corp election changes federal taxation only: reasonable salary (payroll-taxed) plus distributions that escape the 15.3% SE tax. File Form 2553 — never Form 8832, the C-Corp election. Break-even lands around $60–80K of consistent profit after payroll and accounting costs. Massachusetts notes: S-Corp status doesn't reduce the flat 5% (distributions are still Massachusetts income), very large S-Corps face an entity-level net-income measure above $6M in receipts — irrelevant to most readers — and Massachusetts' PTE excise election offers the SALT-cap workaround worth raising with your CPA in the same conversation. Run the numbers in the S-Corp election guide.
Your Massachusetts Tax Calendar
| Date | What's Due |
|---|---|
| Jan 15 / Apr 15 / Jun 15 / Sep 15 | Quarterly estimated taxes — federal and Massachusetts, on pass-through profit |
| Mar 15 | Form 1065 (multi-member LLCs) + K-1s |
| Apr 15 | Form 1040 + Massachusetts Form 1 (the state's individual return — not to be confused with Maryland's Form 1) |
| Your anniversary date | $500 annual report — Corporations Division, zero reminders |
| Monthly/Quarterly | Sales / meals tax returns via MassTaxConnect per your assigned schedule |
Ahmad Adil's Take: Massachusetts front-loads its pain. The fees are brutal and famous; the actual tax system is quietly one of the friendliest in this series — a flat 5% with no county layer beats Maryland's stacked 7.95%, and the surtax is irrelevant until you're clearing seven figures. So my Massachusetts budgeting rule runs leaner than you'd expect: set aside 28–32% of profit for income-side taxes, treat the $500 report as a fixed subscription, and at $70K+ have the S-Corp and PTE-excise conversations together. And if a big exit ever puts the surtax in view — that's the year you hire the CPA before the sale closes, not after.
- ✓Forms your Massachusetts LLC for $39 + the $500 state fee
- ✓Files with the Corporations Division — fast fax/online processing
- ✓Free Massachusetts resident agent the first year
- ✓No upsells · No data selling · Privacy by Default
Disclosure: LLC School may earn a commission via this link, at no cost to you. See our advertising disclosure.
Massachusetts LLC — FAQ
Ahmad Adil is the founder and CEO of LLC School. The figures here — the $500 Certificate of Organization ($520 online/fax), the $500 anniversary-date annual report, and Massachusetts’ 5% flat income tax with the 4% surtax over roughly $1.08M — reflect current Secretary of the Commonwealth and Massachusetts DOR guidance. This is educational content, not legal or tax advice.
About Ahmad Adil → Compare States →