The annual statement costs $25 through Sep 30, 2027, then $15 (MCL 450.5101). It is due February 15 each year after organization. If your LLC is formed after September 30, the statement is not due the next February 15.
The fee is set by state law for the "annual statement of resident agent and registered office". It is a state filing fee, not a registered agent service price.
The LARA page shows a $50 penalty after February 15, but lists it under the professional LLC line, so it is not confirmed whether it applies to a regular LLC.
Michigan LLC fees and deadlines Cited (official pages)
Filing office
LARA, Corporations Division
Formation fee details
$50 Articles of Organization (MCL 450.5101).
Year-1 state total
$50
Ongoing filing
Annual Statement
Ongoing fee
$25 (MCL: $25 through Sep 30, 2027, then $15)
Deadline
February 15 each year after organization. If formed after Sep 30, not due the immediately following Feb 15.
Late penalty
Not confirmed: the LARA page lists a $50 penalty after February 15 next to the professional LLC fee, so it is not confirmed whether it applies to a regular LLC.