Sole Proprietorship Tax Deadlines in Massachusetts
Federal and state filing dates, extensions, and estimate schedules for 2026.
Massachusetts filing deadline
Business income reported on MA personal return.
Due: Apr 15, 2026
Extension: Oct 15, 2026
Form: Form 1 / 1-NR/PY
Estimated payments
Estimated payment dates: Apr 15, 2026, Jun 16, 2026, Sep 15, 2026, Jan 15, 2027.
Due: Apr 15, 2026
FAQ
Does Massachusetts require Sole Proprietorship estimated payments?
Estimated payments are scheduled for Apr 15, 2026, Jun 16, 2026, Sep 15, 2026, Jan 15, 2027.
Where can I file Massachusetts Sole Proprietorship taxes?
Use Massachusetts Department of Revenue resources at https://www.mass.gov/orgs/massachusetts-department-of-revenue for forms and filing instructions.