This checklist outlines your core obligations as an LLC owner in Massachusetts with S Corporation tax status. This is for education purposes only and not advice.
🗂 Entity Maintenance
✅ Annual Report Filing
- Due: On or before your LLC’s anniversary date.
- Fee: $500 (flat rate for LLCs).
- Where:Massachusetts Corporations Division.
- What to Prepare: Business address, registered agent, member/manager info.
💰 Tax Filings & Payments
✅ Massachusetts Corporate Excise Tax
- Due: April 15 (or 3.5 months after fiscal year-end).
- Minimum Tax: $456 annually as of 2025
- Where:MassTaxConnect.
- Forms:
- Form 355S (S Corporation Excise Return)
- Schedule S (Shareholder info)
- Federal Form 1120S (attached)
✅ Federal S Corporation Tax Filing
- Due: March 15 (or 2.5 months after fiscal year-end).
- Form: IRS Form 1120S.
- Where: Via tax software or a preparer.
✅ Estimated Tax Payments (Shareholders)
- Due Dates: April 15, June 15, September 15, January 15.
- Where to Pay:
👥 Payroll & Employment Compliance
✅ Federal Payroll Taxes
- Forms:
- Form 941 (quarterly)
- Form 940 (annual)
- W-2s and W-3s (year-end)
- Where: IRS e-file or payroll provider.
✅ Massachusetts Withholding
- Register: With Mass DOR for employer withholding.
- Forms:
- Form M-941 (quarterly)
- Annual reconciliation
- Where:MassTaxConnect
✅ Paid Family and Medical Leave (PFML)
- Required: If you pay W-2 wages (including to yourself).
- Where:MA PFML Portal
🛡 S Corporation Election Maintenance
- Federal: Confirm IRS Form 2553 was filed and accepted.
- State: Massachusetts conforms automatically—verify status via MassTaxConnect.
📍 Local Licenses & Permits
- Check: With your city/town clerk for local business licenses.
- Attleboro Info:City of Attleboro Clerk’s Office
🧾 Registered Agent & Contact Info
- Maintain: Accurate registered agent and business address.
- Update: Via Corporations Division portal if needed.
🧠 Document Retention & SOP Updates
- Keep: Copies of all filings, confirmations, and payment receipts.
- Update: SOPs annually to reflect deadlines and changes.
🧭 Proactive Compliance Tips
- Set calendar reminders 30–60 days before each deadline.
- Use a shared compliance tracker for team visibility.
- Delegate recurring filings to a trusted assistant or bookkeeper.
- Review MassTaxConnect and IRS accounts quarterly for notices.
This checklist is intended as an introductory guide for individuals considering forming an LLC or those newly navigating LLC ownership in Massachusetts with S Corporation tax status. It’s designed to support informed conversations with your chosen tax professional and business attorney. This content is for educational purposes only and does not constitute legal or tax advice. Requirements may vary by state and are subject to change—always consult with qualified advisors for guidance specific to your situation.