Wisconsin Statutes Taxation (Ch. 70 to 79) § 77.94. Surcharge determination

1. “Begins to do business” includes but is not limited to a change in corporate form and the occurrence of any event that creates a short taxable year for purposes of the taxes under ch. 71.

2. “Ceases to do business” includes but is not limited to a change in corporate form and the occurrence of any event that creates a short taxable year for purposes of the taxes under ch. 71.

1. Multiply its gross tax liability for the taxable year by a fraction the numerator of which is 365 and, if the entity begins to do business in this state after the beginning of its taxable year, the denominator of which is the number of days from the day that it begins to do business in this state until the end of its taxable year and, if the entity ceases to do business in this state before the end of its taxable year, the denominator of which is the number of days from the beginning of its taxable year until the day that it ceases to do business in this state and, if the entity both begins to do business in this state after the beginning of its taxable year and ceases to do business in this state before the end of its taxable year, the denominator of which is the number of days from the day that it begins to do business in this state to the day that it ceases to do business in this state.

2. Determine the surcharge that would be imposed under sub. (1) on the amount calculated under subd. 1.

3. Divide the surcharge under subd. 2 by the fraction under subd. 1.