Massachusetts Quarterly Tax Calculator
Calculate your estimated quarterly tax payments for federal and Massachusetts state taxes. Designed for self-employed individuals, freelancers, and independent contractors.
MA State Tax: Flat 5.0%
Quarterly Payment Amount
$6,522
Per quarter (4 remaining)
Annual Tax Breakdown
2026 Payment Schedule
Jan 1 - Mar 31
Due: April 15, 2026
$6,522
Apr 1 - May 31
Due: June 15, 2026
$6,522
Jun 1 - Aug 31
Due: September 15, 2026
$6,522
Sep 1 - Dec 31
Due: January 15, 2027
$6,522
Don't miss your quarterly payments!
The IRS may charge penalties and interest if you underpay or pay late. Consider setting up automatic payments or calendar reminders.
Massachusetts Quarterly Tax Highlights
Massachusetts has a flat 5% income tax rate
Additional 4% surtax on income over $1 million
Use Form 1-ES for quarterly payments
Massachusetts Quarterly Tax FAQ
What is Massachusetts's income tax rate?
Massachusetts has a flat 5% income tax rate. Additionally, there's a 4% surtax (called the 'Millionaire's Tax') on income exceeding $1 million, bringing the top rate to 9%.
Massachusetts Estimated Quarterly Tax Payments for Self-Employed Workers in 2026
Self-employed workers in Massachusetts face two tax obligations: federal estimated taxes filed with the IRS and state estimated taxes filed with the Massachusetts Department of Revenue. Massachusetts imposes a flat 5% income tax rate on all taxable income. If you expect to owe $400 or more in Massachusetts state income tax after withholding and credits, you must make quarterly estimated payments using Form 1-ES.
Massachusetts imposes an additional 4% surtax (the 'Millionaire's Tax,' approved by voters in 2022) on annual income exceeding $1 million, bringing the top effective rate to 9%. This threshold is adjusted annually for inflation.
| Tax Layer | Rate / Range | Filed With | Form |
|---|---|---|---|
| Federal income tax | 10% – 37% | IRS | 1040-ES |
| Self-employment tax | 15.3% | IRS | 1040-ES / SE |
| Massachusetts state income tax | 5% | Massachusetts Department of Revenue | Form 1-ES |
How Massachusetts's Flat 5% Income Tax Affects Your Quarterly Payments
Massachusetts uses a flat tax rate of 5%, which simplifies quarterly tax calculations. Regardless of income level, every dollar of taxable income is taxed at the same rate. This makes it straightforward to estimate your state quarterly payments — simply multiply your projected net self-employment income by 5% and divide by four.
For a single self-employed worker in Massachusetts earning $100,000 in net self-employment income, the estimated annual tax breakdown is:
| Tax Component | Estimated Amount | Calculation Basis |
|---|---|---|
| Federal income tax | ~$11,600 | After $15,700 standard deduction, 2026 brackets |
| Self-employment tax | ~$14,130 | 15.3% on 92.35% of net earnings |
| Massachusetts state income tax | ~$5,000 | 5% flat rate |
| Total annual tax | ~$30,730 | |
| Quarterly payment | ~$7,683 | Total / 4 quarters |
State payments can be made online through the Massachusetts Department of Revenue portal at mass.gov/dor, by mail with a Form 1-ES voucher, or via electronic funds transfer where available.
Federal Self-Employment Tax and Quarterly Due Dates
All self-employed workers must pay federal self-employment (SE) tax of 15.3% on 92.35% of net earnings. This consists of 12.4% for Social Security (on earnings up to $184,500 in 2026) and 2.9% for Medicare (no cap). An additional 0.9% Medicare surtax applies to earnings above $200,000 (single filers).
Both Massachusetts and federal estimated tax payments follow the same quarterly schedule:
| Quarter | Income Period | Due Date |
|---|---|---|
| Q1 | January 1 – March 31 | April 15, 2026 |
| Q2 | April 1 – May 31 | June 15, 2026 |
| Q3 | June 1 – August 31 | September 15, 2026 |
| Q4 | September 1 – December 31 | January 15, 2027 |
To avoid underpayment penalties, pay at least 100% of your prior-year tax liability (or 110% if your AGI exceeds $150,000) spread across four equal payments, or at least 90% of your current-year tax. You can deduct 50% of your self-employment tax from your adjusted gross income, reducing both your federal and Massachusetts taxable income.
Related Calculators
Official References
This calculator uses current federal and Massachusetts tax rates and schedules:
- IRS Estimated Tax Guidelines
Federal quarterly tax requirements and Form 1040-ES
- Massachusetts DOR
Official Massachusetts tax authority
- IRS Self-Employment Tax
Social Security and Medicare tax information
This calculator provides estimates based on 2026 tax rates. Your actual tax liability may vary based on deductions, credits, and other factors. Consult a tax professional for personalized advice.