Minn. Stat. § 299F.21
Subd. 1. Estimated installment payments.
On or before April 1, June 1, and December 1 of each year, every licensed insurance company, including reciprocals or interinsurance exchanges, doing business in the state, excepting farmers' mutual fire insurance companies and township mutual fire insurance companies, shall pay to the commissioner of revenue installments equal to one-third of, a tax upon its fire premiums or assessments or both, based on a sum equal to one-half of one percent of the estimated fire premiums and assessments, less return premiums and dividends, on all direct business received by it in this state, or by its agents for it, in cash or otherwise, during the year, including premiums on policies covering fire risks only on automobiles, whether written under floater form or otherwise. In the case of a mutual company or reciprocal exchange the dividends or savings paid or credited to members in this state shall be construed to be return premiums. The money so received into the state treasury shall be credited to the general fund. A company that fails to make payments of at least one-third of either (1) the total tax paid during the previous calendar year or (2) 80 percent of the actual tax for the current calendar year is subject to the penalty and interest provided in this chapter, unless the total tax for the current tax year is $500 or less.
Subd. 1a. Electronic funds transfer payments.
If the aggregate amount of fire marshal tax payments under this section and the premium tax payments under section 60A.15 made during a calendar year is equal to or exceeds $120,000, all tax payments in the subsequent calendar year must be paid by means of a funds transfer as defined in section 336.4A-104, paragraph (a). The funds transfer payment date, as defined in section 336.4A-401, must be on or before the date the payment is due. If the date the payment is due is not a funds transfer business day, as defined in section 336.4A-105, paragraph (a), clause (4), the payment date must be on or before the funds transfer business day next following the date the payment is due.
Subd. 1b. Addition to tax.
In case of an underpayment of installments by an insurer, there must be added to the tax for the taxable year an amount determined at the rate specified in section 270.75 upon the amount of underpayment.
Subd. 1c. Amount of underpayment.
For purposes of subdivision 1a, the amount of the underpayment is the excess of: (1) the amount of the installment; over (2) the amount, if any, of the installment paid on or before the last date prescribed for payment.
Subd. 1d. Period of underpayment.
The period of the underpayment runs from the date the installment was required to be paid to the earliest of the following dates:
Subd. 1e. Definition of tax.
The term "tax" means the tax imposed by this chapter.
Subd. 1f. Failure to file estimate.
In the case of an insurer that fails to file an estimated tax statement for a taxable year when one is required, the period of the underpayment runs from the installment dates as set forth in subdivision 1 to whichever of the periods set forth in subdivision 1d is the earlier.
Subd. 2. Annual returns.