Wis. Admin. Code § Tax 2.46 — Apportionment of apportionable income of interstate air carriers

Tax 2.46(1) (1) General. The apportionable income of an air carrier engaged in business in and outside this state shall be apportioned to Wisconsin as described in this section, except if the air carrier is in a combined group, its Wisconsin share of the combined group’s apportionable income is computed as provided in s. 71.255 (5) , Stats., and further detailed in s. Tax 2.61 (7) .

Tax 2.46(2) (2) Definition. In this section, “engaged in business in and outside this state” has the same meaning as in s. Tax 2.39 (2) (b) .

Tax 2.46(3) (3) Apportionment formula computation. An air carrier that is engaged in business in and outside this state shall apportion its apportionable income to this state on the basis of the ratio obtained by taking the arithmetical average of the following 3 ratios:

Tax 2.46(3)(a) (a) The ratio which the aircraft arrivals and departures within this state scheduled by such carrier during the calendar or fiscal year bears to the total aircraft arrivals and departures within and without this state scheduled by such carrier during the same period; provided that in the case of nonscheduled operations all arrivals and departures shall be substituted for scheduled arrivals and departures.

Tax 2.46(3)(b) (b) The ratio which the revenue tons handled by such carrier at airports within this state during the calendar or fiscal year bears to the total revenue tons handled at airports within and without this state during the same period.

Tax 2.46(3)(c) (c) The ratio which such air carrier’s originating revenue within this state for the calendar or fiscal year bears to the total originating revenue within and without this state for the same period.