Back to all states

Montana Filing Guide

Last updated: February 4, 2026

Tax Rate

2.75%

Filing Frequency

Annual

File policies within 60 days of effective date via SLIP+ for States (2026+) or Legacy Portal (2025 and earlier). Annual tax due April 1. Quarterly transaction fee invoicing: Q1 (Jan-Mar) invoiced April 1, Q2 (Apr-Jun) invoiced July 1, Q3 (Jul-Sep) invoiced October 1, Q4 (Oct-Dec) invoiced January 4. SLIP+ fees due 45 days after invoice. Quarterly attestations required for all new and renewal transactions.

Filing Method

portal

Format: SLIP+ for States Portal Filing

Requirements

Montana requires filing via SLIP+ for States portal for policies effective 1/1/2026 or later (Legacy Portal for earlier policies). File within 60 days of effective date. Tax: 2.75% standard (0.75% for legal professional liability) + 2.5% fire tax on fire portions + 0.175% transaction fee. Stamping fee: 0.25% if mailed, 0% if e-filed. Annual tax due April 1. Quarterly attestations required. Diligent search: 3 declinations from admitted carriers OR 10%+ premium savings exemption OR export list coverage. Policy endorsement required on all contracts. Foreign insurers: $15M capital/surplus (or $4.5M with waiver). Alien insurers: NAIC Quarterly Listing + $5.4M trust. Montana recognizes NRRA exempt commercial purchaser exemption and has industrial insurance exemption (captive insurers only).

Filing Methods

  • SLIP+ for States (2026+)
  • Legacy Portal (pre-2026)
  • ACH Debit (transaction fees)

Filing Steps

  1. 1SLIP+ for States Transition: Policies effective 1/1/2026 or later MUST be filed in SLIP+ for States portal. Policies effective before 1/1/2026 remain in Legacy Portal (https://svc.mt.gov/csi/surplus/login.aspx).
  2. 260-Day Filing Deadline: All policies and endorsements must be filed within 60 days of effective date. This is measured from policy effective date, not receipt date.
  3. 3Policy Endorsement Required: ALL contracts must be endorsed with surplus lines disclaimer and producer license number plus guaranty fund exclusion language. Producer must sign endorsement.
  4. 4Quarterly Attestations: Complete quarterly attestations in SLIP+ for all new and renewal transactions. This is mandatory for compliance.
  5. 5Tax Calculation: 2.75% standard rate (0.75% for legal professional liability code 7002) + 2.5% fire tax on fire portions + 0.175% transaction fee. Transaction fee calculated on gross premium (premium plus taxable policy fees).
  6. 6Fire Tax: 2.5% additional tax applies to fire portions of surplus lines placements. Fire coverage varies by line per ARM 6.6.4803. Identify fire portions during policy entry.
  7. 7Stamping Fee Options: 0.25% if policy mailed to Commissioner, 0% if filed electronically. E-filing through SLIP+ or Legacy Portal = 0% stamping fee.
  8. 8Policy Fees vs Producer Fees: ALL policy and carrier fees are taxable. Producer fees (max $100 commercial, $50 personal lines) are explicitly NON-TAXABLE.
  9. 9Diligent Search - Three Options: (1) 3 declinations from admitted carriers, OR (2) 10%+ premium savings vs admitted quote, OR (3) Coverage on Montana Export List (Approved Risk List).
  10. 1010% Premium Savings Exemption: If unauthorized eligible surplus lines insurer quotes premium at least 10% lower than authorized insurer, diligent search NOT required. Document premium comparison.
  11. 11Export List Exemption: No diligent search required for coverages on Montana Approved Risk List (available at https://csimt.gov/wp-content/uploads/2025/01/Final-Approve-Risk-List-1.pdf).
  12. 12Annual Tax Due Date: April 1 annually. Quarterly payments accepted. Tax applies to all policies regardless of when filed during year.
  13. 13Quarterly Transaction Fee: 0.175% fee invoiced quarterly: Q1 (Apr 1), Q2 (Jul 1), Q3 (Oct 1), Q4 (Jan 4). SLIP+ fees due 45 days after invoice via ACH Debit.
  14. 14NRRA ECP: Montana recognizes exempt commercial purchaser exemption under NRRA. File ECP certificate. ECP does not exempt from tax.
  15. 15Industrial Insured Exemption: Montana has industrial insurance exemption applicable to CAPTIVE INSURERS ONLY. Not general industrial insured exemption.
  16. 16Insurer Eligibility: Foreign insurers need $15M capital/surplus (or $4.5M with commissioner waiver). Alien insurers need NAIC Quarterly Listing + $5.4M trust fund.
  17. 17Domestic Surplus Lines Insurers: Montana now allows formation of domestic surplus lines insurers (HB 60, signed Feb 27, 2025).
  18. 18Registered Agent: Surplus lines insurers must designate registered agent for service of process (no longer appoint commissioner as agent).

Required Forms

  • SLIP+ for States Filing (policies effective 1/1/2026 or later)
  • Legacy Portal Filing (policies effective before 1/1/2026)
  • Quarterly Attestation (for all new and renewal transactions)
  • Policy Endorsement (required on all contracts)
  • Annual Tax Statement (due April 1)
  • Diligent Search Documentation (3 declinations, unless exempt)
  • ECP Certificate (for exempt commercial purchaser)
  • Fire Tax Calculation (for fire coverage portions)
  • Alien Insurer Trust Fund Documentation ($5.4M)
  • Foreign Insurer Capital/Surplus Verification ($15M or waiver)

Common Issues to Avoid

  • Filing in wrong portal - policies effective 1/1/2026+ go to SLIP+, earlier policies stay in Legacy Portal
  • Missing 60-day filing deadline - file within 60 days of effective date, not receipt date
  • Forgetting quarterly attestations - required for all new and renewal transactions
  • Not identifying fire coverage portions - 2.5% fire tax applies, must identify and calculate
  • Incorrect tax rate for legal professional liability - use 0.75% not 2.75% for code 7002
  • Missing policy endorsement or signature - endorsement required on ALL contracts, must be signed
  • Not claiming 10% premium savings exemption - if eligible, exempts from 3-declination diligent search
  • Not checking export list before diligent search - export list coverage exempts from diligent search
  • Treating producer fees as taxable - producer fees (max $100/$50) are NOT taxable
  • Missing transaction fee payment - 0.175% quarterly fee invoiced separately, due 45 days after invoice
  • Not completing quarterly attestation in SLIP+ - attestations mandatory for compliance
  • Attempting to file pre-2026 policies in SLIP+ - these belong in Legacy Portal
  • Missing April 1 annual tax deadline - late payments subject to penalties
  • Placing with non-eligible insurer - verify $15M capital/surplus for foreign, NAIC Quarterly Listing for alien

Helpful Tips

  • Portal Selection: 2026+ effective dates = SLIP+ for States. Pre-2026 = Legacy Portal. Both portals coexist.
  • 60-Day Clock: Starts from policy effective date, not when you receive policy. Plan accordingly.
  • E-File to Save: Filing electronically = 0% stamping fee. Mailing = 0.25%. Always e-file.
  • Legal Professional Liability: Remember 0.75% rate (not 2.75%) for coverage code 7002.
  • Fire Tax Identification: Review ARM 6.6.4803 to determine which lines include fire coverage. Common in property policies.
  • 10% Savings Documentation: If surplus lines quote is 10%+ cheaper than admitted, document comparison to skip diligent search.
  • Export List Check First: Review Approved Risk List before starting diligent search - may exempt you.
  • Producer Fee Limit: Cap producer fees at $100 (commercial) or $50 (personal lines) to keep non-taxable status.
  • Quarterly Attestations: Set reminders - complete attestations promptly for all transactions to stay compliant.
  • Transaction Fee ACH: 0.175% fee charged quarterly via ACH Debit. Ensure account has funds 45 days after invoice.
  • SLIP+ Resources: Use https://slipplus.com/states/montana/ for Montana-specific guidance, FAQs, and support.
  • Eligible Companies: Check current list at https://csimt.gov/wp-content/uploads/2025/11/MT116_Company_11_19_2025_093712.xlsx
  • Tax Estimator: Use SLIP+ tax estimator tool for complex calculations involving fire tax and multiple rates.
  • Commissioner Waiver: Foreign insurers with $4.5M-$15M may qualify for capital/surplus waiver - commissioner makes affirmative finding.
  • No Association: Montana has NO Surplus Lines Association - all filings go directly to Commissioner.

Important Notes

Montana uses SLIP+ for States portal starting 2026 (policies effective 1/1/2026+). 60-day filing deadline from effective date. Tax: 2.75% standard (0.75% for legal professional liability code 7002) + 2.5% fire tax + 0.175% transaction fee. Stamping fee: 0.25% if mailed, 0% if e-filed. Policy fees taxable, producer fees NOT taxable (max $100 commercial, $50 personal). Quarterly attestations required. Diligent search: 3 declinations OR 10%+ premium savings OR export list. NO Surplus Lines Association. Foreign insurers: $15M min or $4.5M with waiver. Alien insurers: NAIC Quarterly Listing + $5.4M trust. Now allows domestic surplus lines insurers (HB 60, 2025). Policy endorsement required on all contracts.

Frequently Asked Questions

What is the surplus lines tax rate in Montana?

The surplus lines tax rate in Montana is 2.75%.

When is surplus lines tax due in Montana?

File policies within 60 days of effective date via SLIP+ for States (2026+) or Legacy Portal (2025 and earlier). Annual tax due April 1. Quarterly transaction fee invoicing: Q1 (Jan-Mar) invoiced April 1, Q2 (Apr-Jun) invoiced July 1, Q3 (Jul-Sep) invoiced October 1, Q4 (Oct-Dec) invoiced January 4. SLIP+ fees due 45 days after invoice. Quarterly attestations required for all new and renewal transactions.

How do I submit surplus lines filings in Montana?

portal

Contact Information