HAR § 18-235-29-01 — Apportionment formula

All business income of each trade or business of the taxpayer shall be apportioned to this State by use of the apportionment formula set forth in section 235-29, HRS. The elements of the apportionment formula are the property factor (see sections 18-235-30-01 to 18-235-32-01), the payroll factor (see sections 18-235-33-01 to 18-235-34-01) and the sales factor (see sections 18-235-35-01 to 18-235-37-01) of the trade or business of the taxpayer.