Tax Rate
3.00%
Filing Frequency
quarterly
**Quarterly Filing:** Within 45 days of quarter end • Q1 (Jan-Mar): Due May 15 • Q2 (Apr-Jun): Due August 15 • Q3 (Jul-Sep): Due November 15 • Q4 (Oct-Dec): Due February 15 (following year) **Estimated Payments:** 3 payments required (unless annual tax ≤ $1,000 or Risk Retention Group) • 1st Payment: Due April 30 (35% of prior year OR 3% of Jan 1-Apr 30 premiums) • 2nd Payment: Due June 25 (35% of prior year OR 3% of May 1-June 25 premiums) • 3rd Payment: Due October 31 (15% of prior year OR 3% of June 26-Oct 31 premiums) **Annual Return:** Form INS-7 due March 16 following tax year
Filing Method
portal
Format: Maine Tax Portal electronic format
Requirements
Filing Methods
- Maine Tax Portal (Electronic - Required 2025+)
- Quarterly Filing
- Annual Filing
- Estimated Payments (Form INS-6)
Filing Steps
- 1Electronic filing MANDATORY beginning 2025 via Maine Tax Portal
- 2Electronic payment MANDATORY if combined Maine tax ≥ $10,000
- 3Consumer notice must be 16-POINT TYPE on separate document (Sept 24, 2025+)
- 4Consumer notice must be SIGNED by applicant and retained 5 years
- 5Policy stamp required on all contracts with producer name
- 6Diligent search requires TOTAL MARKET UNAVAILABILITY (not just 3 declinations)
- 7All insurers must be on Maine eligible insurer list
- 8Large commercial policyholders exempt from diligent search
- 9Wet marine and transportation exempt from tax (but must use eligible insurer)
- 10Quarterly estimated payments required unless annual tax ≤ $1,000
- 11Records must be accessible for 6 years
- 12No stamping fee or stamping office in Maine
Required Forms
- Form INS-6 (Estimated Payment) - Due April 30, June 25, October 31
- Form INS-7 (Annual Return) - Due March 16
- Consumer Notice (16-point type, signed) - Effective Sept 24, 2025
- Policy Stamp (required on all contracts)
- Diligent Search Documentation
Common Issues to Avoid
- Placing coverage without documenting total market unavailability
- Missing 16-point consumer notice or improper format
- Consumer notice not signed by applicant
- Policy stamp missing or incorrect format
- Using insurer not on Maine eligible insurer list
- Missing quarterly estimated payments
- Filing after 45-day quarterly deadline
- Not filing electronically (required 2025+)
- Inadequate record retention (must keep 5-6 years)
- Placing prohibited coverages (workers comp, motor vehicle, health)
- Not documenting large commercial policyholder exemption
- Calculating tax incorrectly (should be on net premiums after returns and dividends)
Helpful Tips
- Register for Maine Tax Portal account before first filing
- Create 16-point consumer notice template for Sept 24, 2025+ policies
- Create policy stamp template with producer information
- Verify insurer on Maine eligible list before binding
- Document diligent search showing total market unavailability (not just 3 declinations)
- Set up quarterly estimated payment reminders (April 30, June 25, Oct 31)
- Set up quarterly filing reminders (45 days after quarter end)
- Maintain comprehensive diligent search files
- Track large commercial policyholders for exemption
- Separate wet marine and transportation for exemption tracking
- Keep signed consumer notices for 5 years minimum
- Maintain all records for 6 years minimum
Important Notes
Frequently Asked Questions
What is the surplus lines tax rate in Maine?
The surplus lines tax rate in Maine is 3.00%.
When is surplus lines tax due in Maine?
**Quarterly Filing:** Within 45 days of quarter end • Q1 (Jan-Mar): Due May 15 • Q2 (Apr-Jun): Due August 15 • Q3 (Jul-Sep): Due November 15 • Q4 (Oct-Dec): Due February 15 (following year) **Estimated Payments:** 3 payments required (unless annual tax ≤ $1,000 or Risk Retention Group) • 1st Payment: Due April 30 (35% of prior year OR 3% of Jan 1-Apr 30 premiums) • 2nd Payment: Due June 25 (35% of prior year OR 3% of May 1-June 25 premiums) • 3rd Payment: Due October 31 (15% of prior year OR 3% of June 26-Oct 31 premiums) **Annual Return:** Form INS-7 due March 16 following tax year
How do I submit surplus lines filings in Maine?
portal
