Massachusetts Self-Employment Tax Calculator 2026
Massachusetts has a flat income tax rate of 5.0%. Use this calculator to estimate your total tax liability including federal self-employment tax, federal income tax, and Massachusetts state income tax.
Your 2026 Tax Estimate — Massachusetts
Total Tax
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Take Home
$0
Effective Rate
0%
Quarterly Payment
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Tax Breakdown
Quarterly Estimated Tax Schedule
Self-Employment Tax in Massachusetts (MA)
If you're self-employed in Massachusetts, you'll pay three types of tax on your 1099 income: federal self-employment tax (15.3%), federal income tax (10-37% depending on your bracket), and Massachusetts state income tax. Massachusetts has a flat income tax rate of 5.0%.
Important note: Massachusetts has a 5% flat rate plus a 4% surcharge on income over $1M (the 'Millionaire's Tax').
How Self-Employment Tax Works
The federal self-employment tax rate is 15.3% — covering both Social Security (12.4%) and Medicare (2.9%). This is calculated on 92.35% of your net self-employment earnings. For 2026, Social Security tax applies to earnings up to $176,100. You can deduct half of your SE tax when calculating your federal income tax, which reduces your overall tax burden.
Other States
No Income Tax States
Massachusetts Tax Quick Facts
- Income Tax
- Yes
- Tax Type
- flat
- Rate
- 5.00%
- Federal SE Tax
- 15.3%