Michigan Compiled Laws

Mich. Comp. Laws § 500.2406 (2026)

Required filings by insurers; insufficient information; supporting information; notice; public inspection; becoming member of or subscriber to licensed rating organization; rates and rating systems regarding worker's compensation insurance; filings; certification; trade secret.

✓ current as of July 2026

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THE INSURANCE CODE OF 1956

Act 218 of 1956

500.2406 Required filings by insurers; insufficient information; supporting information; notice; public inspection; becoming member of or subscriber to licensed rating organization; rates and rating systems regarding worker's compensation insurance; filings; certification; trade secret.

Sec. 2406.

(1) Except for worker's compensation insurance, an insurer shall file with the director a manual of classification, manual of rules and rates, rating plan, or modification of a manual of classification, manual of rules and rates, or rating plan that the insurer proposes to use. Each filing under this subsection must state the proposed effective date of the filing and must indicate the character and extent of the coverage contemplated. If a filing is not accompanied by the information on which the insurer supports the filing, and the director does not have sufficient information to determine if the filing meets the requirements of this chapter, the director shall within 10 days of the filing give written notice to the insurer to furnish the information that supports the filing. The information furnished in support of a filing may include the experience or judgment of the insurer or rating organization making the filing, its interpretation of any statistical data it relies on, the experience of other insurers or rating organizations, or any other relevant factors. Except as otherwise provided in subsection (6), the department shall make a filing under this subsection and any supporting information open to public inspection after the filing becomes effective.

(2) Except for worker's compensation insurance, an insurer may satisfy its obligation to make filings by becoming a member of, or a subscriber to, a licensed rating organization that makes filings, and by filing with the director a copy of its authorization of the rating organization to make filings on its behalf. This chapter does not require an insurer to become a member of or a subscriber to a rating organization.

(3) For worker's compensation insurance in this state, the insurer shall file with the director all rates and rating systems.

(4) The rates and rating systems for worker's compensation insurance must be filed not later than the date the rates and rating systems are to be effective. A filing under this subsection meets the requirements of this chapter unless and until the director disapproves a filing under section 2418 or 2420.

(5) A filing under subsections (3) and (4) must be accompanied by a certification by the insurer that, to the best of the insurer's information and belief, the filing conforms to the requirements of this chapter.

(6) An insurer or a rating organization filing on the insurer's behalf may designate information included in the filing or any accompanying information as a trade secret. The insurer or the rating organization filing on behalf of the insurer shall demonstrate to the director that the designated information is a trade secret. If the director determines that the information is a trade secret, the information is not subject to public inspection and is exempt from the freedom of information act, 1976 PA 442, MCL 15.231 to 15.246. As used in this subsection, "trade secret" means that term as defined in section 2 of the uniform trade secrets act, 1998 PA 448, MCL 445.1902. However, trade secret does not include filings and information accompanying filings under this section that were subject to public inspection before the effective date of the amendatory act that added this subsection.

History: 1956, Act 218, Eff. Jan. 1, 1957 ;-- Am. 1970, Act 180, Imd. Eff. Aug. 3, 1970 ;-- Am. 1982, Act 7, Eff. Jan. 1, 1983 ;-- Am. 1993, Act 200, Eff. Dec. 28, 1994 ;-- Am. 2015, Act 141, Eff. Jan. 11, 2016

Compiler's Notes:

Section 3 of Act 200 of 1993 provides as follows:

“Section 3. This amendatory act shall not take effect unless the state administrative board certifies in writing to the secretary of state by December 31, 1994 that an agreement for the transfer of all or substantially all of the assets and the assumption of all or substantially all of the liabilities of the state accident fund has been consummated with a permitted transferee pursuant to the requirements of section 701a of the worker's disability compensation act of 1969, Act No. 317 of the Public Acts of 1969, being section 418.701a of the Michigan Compiled Laws.”

PopularName Notes:

Act 218

Notes of Decisions

Cited in 8 cases (1 in the last 5 years), 1978–2025 · leading case: Shavers v. Attorney Gen., 267 N.W.2d 72 (Mich. 1978).

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Shavers v. Attorney Gen., 267 N.W.2d 72 (Mich. 1978). · cites it 6× “MCL 500.2406; MSA 24.12406. The Commissioner of Insurance may approve or reject the proposed rates and rate-making factors.”

Hoving v. Transnation Title Ins., 545 F. Supp. 2d 662 (E.D. Mich. 2008). · cites it 2× “Mich. Comp. Laws § 500.2406 (a). The plaintiff insists that he is not basing his action on a violation of this statute, and therefore the exemption in the MCPA does not apply.”

Hoving v. Lawyers Title Ins., 256 F.R.D. 555 (E.D. Mich. 2009). · cites it 2× “”); Mich. Comp. Laws § 500.2406 (1) (“[Ejvery insurer shall file with the commissioner every manual of classification, every manual of rules and rates, every rating plan, and every modification of any of the foregoing that it proposes to use.”

Corwin v. Lawyers Title Ins., 276 F.R.D. 484 (E.D. Mich. 2011). · cites it 2× “See Mich. Comp. Laws §§ 500.2406 & 500.2412. The rate manuals filed by both companies before the merger established a basic premium rate based on the amount of coverage sought for both owner’s and lender’s policies.”

Comm'r of Ins. v. Advisory Bd. of the Michigan State Accident Fund, 434 N.W.2d 433 (Mich. Ct. App. 1988). “Specifically, MCL 500.2406; MSA 24.12406 requires insurers providing workers’ compensation coverage to file their rates and rating systems with the Commissioner of Insurance: (3) Every insurer with regard to worker’s compensation insurance in this state shall file with the…”

Attorney Gen. v. Ins. Comm'r, 323 N.W.2d 645 (Mich. Ct. App. 1982). · cites it 2× “Defendant Workers’ Compensation Rating and Inspection Association ("association”) is a licensed rating organization subject to MCL 500.2406; MSA 24.12406 which represents workers’ compensation insurers in Michigan.”

Michigan Educ. Special Servs. Ass'n v. Comm'r of Ins., 425 N.W.2d 157 (Mich. Ct. App. 1988). “218 of the Public Acts of 1956, entitled as amended "The insurance code of 1956,” being sections 500.2406, 500.2431, and 500.2436 of the Compiled Laws of 1970.”

Amber M Pattee v. Farm Bureau Gen. Ins Co. of Michigan (Mich. Ct. App. 2025). “6) states: For automobile insurance, an insurer shall file a manual or plan in accordance with chapter 24, except that the manual or plan must remain on file for a waiting period of 90 days before it becomes effective, which period may not be extended by the director, and the…”

— Mich. Comp. Laws § 500.2406(1) — 1 case

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