Massachusetts Self-Employment Tax Calculator (2026)
Federal self-employment tax, federal income tax and Massachusetts state income tax on 1099 income, plus how much to set aside for each estimated payment.
Federal 2026 and Massachusetts 2026 data checked against the official publications, last on 2026-09-05 Runs in your browser — nothing you type is sent anywhere, not even when you reload or share the link No sign-up Methodology and data status
- Total tax
- $18,083
- Effective rate
- 25.1%
- Set aside per quarter
- $4,521
- After-tax income
- $53,917
| Breakdown | |
|---|---|
| Net profit (income − expenses) | $72,000 |
| Self-employment tax | $10,173 |
| Social Security (12.4%) | $8,245 |
| Medicare (2.9%) | $1,928 |
| Federal income tax | $4,630 |
| Adjusted gross income | $66,913 |
| Standard deduction | −$16,100 |
| Qualified business income deduction (20%) | −$10,163 |
| Taxable income · marginal rate 12.0% | $40,651 |
| Massachusetts income tax | $3,280 |
| Total federal + state | $18,083 |
Local income tax (never in the total above): Massachusetts has no city or county income taxes.
Amounts to set aside, not bills: federal $3,701 for each Form 1040-ES installment (Apr 15, Jun 15, Sep 15, Jan 15). Massachusetts: $820 per installment on its own schedule. For the safe-harbor amount and payments you have already made, use the quarterly calculator with these inputs.
Massachusetts and self-employment income
Massachusetts taxes self-employment income at a flat 5%, plus a 4% surtax on taxable income over about $1.1 million. There is no standard deduction; instead each filer gets a personal exemption ($4,400 single, $8,800 joint, $6,800 head of household) and $1,000 per dependent, and self-employment tax paid is deductible up to $2,000. Massachusetts does not use the federal deduction for half of self-employment tax or the 20% QBI deduction. Very low incomes owe nothing under No Tax Status ($8,000 single; $14,400 head of household and $16,400 joint, each plus $1,000 per dependent), and the Limited Income Credit keeps the tax small just above that line.
Massachusetts rules used by this calculator (2026)
- Massachusetts applies a flat 5% rate for 2026, plus a 4% surtax on taxable income over $1,107,750.
- There is no standard deduction.
- Each filer gets a personal exemption that depends on income.
- Each dependent adds a $1,000 deduction.
- Self-employment tax paid is deductible up to $2,000 per person; the federal deduction for half of it is not used.
- No tax is due at or below $8,000 of income single ($16,400 joint, plus $1,000 per dependent), and just above it the tax is capped at 10% of the income over the line (the limited income credit).
- Massachusetts's earned income credit is 40% of the federal credit, refundable; the calculator applies it.
- A refundable $440 credit per child under 13; the calculator applies it.
- No Massachusetts tax is due when income is $8,001 or less ($16,401 joint) before exemptions.
- Massachusetts does not allow the federal deduction for half of self-employment tax; state tax applies to net profit before that deduction.
- It does allow the self-employed health insurance deduction on its own return, but not SEP-IRA contributions or solo 401(k) contributions.
- Massachusetts has no city or county income taxes.
What a Massachusetts freelancer may still owe
- Massachusetts requires estimated payments (Form 1-ES) when you expect to owe more than $400.
- There is no city or county income tax. Applied here: the Massachusetts EITC (40% of the federal credit, refundable) and the refundable child and family tax credit ($440 per dependent under 13 — enter your children under 13 above); neither is available to married filing separately.
What Massachusetts costs at three levels of profit (2026)
A single filer with no dependents and no other income, taking the standard deduction. The state column is Massachusetts's own tax after its deductions, exemptions and credits.
| Net profit | Federal | Massachusetts | Total | Effective rate |
|---|---|---|---|---|
| $50,000 | $9,732 | $2,180 | $11,912 | 23.82% |
| $75,000 | $15,495 | $3,430 | $18,925 | 25.23% |
| $100,000 | $22,365 | $4,680 | $27,045 | 27.04% |
At $75,000 of profit, Massachusetts takes $3,430 — 18.12% of the total tax bill. Change any input in the calculator above to see your own figures.
How the federal part is worked out
Net profit is 1099 income less business expenses (Schedule C). Self-employment tax is 15.3% of 92.35% of that profit — 12.4% Social Security up to $184,500 of combined wages and earnings, 2.9% Medicare on all of it. Half of that tax, the $16,100 standard deduction ($32,200 joint) and the 20% qualified business income deduction come off before the 2026 brackets are applied; the child tax credit and the earned income credit then reduce what is left, and the refundable parts can offset self-employment tax. The methodology page sets out the full sequence and every rule the calculator leaves out, including how Massachusetts's figures are derived.
Quarterly estimated tax deadlines (2026)
If you expect to owe $1,000 or more of federal tax for the year, the IRS expects four estimated payments (Form 1040-ES). Massachusetts runs its own estimated-payment schedule with its own threshold (see above); the calculator shows the federal installment and the Massachusetts installment separately, and one combined amount to set aside each quarter.
The 2026 dates are April 15, 2026, June 15, 2026, September 15, 2026, January 15, 2027. The federal amount is split into four equal Form 1040-ES installments after any withholding you entered; paying 100% of last year's tax instead (110% above $150,000 of prior-year AGI) also avoids the penalty. The quarterly calculator works that out and subtracts what you have already paid, and the guide to the due dates explains the rule.
Common questions
Does Massachusetts tax self-employment income differently from wages?
For state income tax, net profit from self-employment is ordinary income like wages. The self-employment tax itself is federal only; Massachusetts does not add a state equivalent.
Is half of self-employment tax really deductible?
Yes, for federal tax. The employer-equivalent half is an adjustment to income on Schedule 1, which lowers your AGI and therefore your federal income tax. It does not reduce the self-employment tax itself. Massachusetts does not allow this deduction for state tax.
Does an LLC change these numbers?
For federal income tax and self-employment tax, a single-member LLC taxed as a sole proprietorship follows exactly the calculation shown here. State and local obligations can still differ: an LLC may be a taxable entity for a state's franchise, gross-receipts or excise tax, and may owe registration or licence fees a sole proprietor does not — Massachusetts's are listed above. Electing S-corporation status changes the federal arithmetic too (salary plus distributions) and is outside this tool's scope.
What if I moved to Massachusetts during the year?
Income earned while you were a resident of another state is taxable there under that state's rules. This calculator assumes all income was earned as a Massachusetts resident.
Data sources and status
Federal figures for 2026: verified · last verified 2026-09-05 · the revenue procedures and forms they were read from, with every other data set
Massachusetts figures for 2026: verified · last verified 2026-09-08
- Massachusetts Department of Revenue : 2026 Form 1-ES instructions (Wayback copy): 5% rate and the 4% surtax on taxable income over $1,107,750 for 2026; DOR tax rates page (updated 2025-12-30) with the same 2026 threshold
- Massachusetts Department of Revenue : 2025 Form 1 instructions for every unindexed amount (exemptions, dependents, the $2,000 line 11 cap, No Tax Status and Limited Income Credit thresholds), none of which the statute indexes; TIR 26-4 (2026-06-23) confirming non-conformity to the 2025 federal QBI, tips and overtime provisions (St. 2026 c.101)
- M.G.L. c.62 §3 (exemptions) and §2(d)(1)(Q) via TIR 23-1; the rate section §4 was not read directly
- Massachusetts Department of Revenue : 2025 Form 1 instructions, line 43 (earned income credit: 40% of the federal credit on Form 1040 line 27a, refundable) and line 46 (child and family tax credit: $440 per dependent under 13, or 65+ / disabled, no phase-out, no cap, refundable; not for married filing separately); M.G.L. c.62 §6(h) and §6(x)
- Massachusetts Department of Revenue : 'Massachusetts Medical-Related Deductions' page (read 2026-09-18): self-employed persons may deduct from Massachusetts gross income amounts paid for health insurance to the extent allowed under IRC §162(l), limited to earned income from the trade or business
- Massachusetts Department of Revenue : 2025 Form 1 instructions, Schedule Y line 7 (self-employed health insurance: the amount from U.S. Form 1040 Schedule 1 line 17)
- Massachusetts Department of Revenue : 'Massachusetts Gross, Adjusted Gross, and Taxable Income' page (updated 2024-12-20): Massachusetts AGI = federal gross income ± Schedule B and D adjustments − Schedule Y lines 1–10; No Tax Status and the Limited Income Credit key on it
- Massachusetts Department of Revenue : 'Tax Treatment of Non-Government Pensions in Massachusetts' page (updated 2026-04-03): §404 deductions for contributions on behalf of partners and owners of sole proprietorships are not allowed (401(k) plans of a sole proprietorship included); Keogh (HR-10) contributions are made with after-tax dollars and are not deductible
Massachusetts Department of Revenue · How figures are checked · Corrections log
Other states
Paying as you go? The quarterly estimated tax calculator applies the federal safe harbor and subtracts what you have already paid.