Idaho Administrative Code
Title IDAPA 35 - Tax Commission, State
Rule 35.01.01 - INCOME TAX ADMINISTRATIVE RULES
Section 35.01.01.332 - APPORTIONABLE AND NONAPPORTIONABLE INCOME DEFINED: TRANSACTIONAL TEST

01. In General. Apportionable income includes income arising from transactions and activity in the regular course of the taxpayer's trade or business.

02. Apportionable Income for Idaho. If the transaction or activity is in the regular course of the taxpayer's trade or business, part of which trade or business is conducted within Idaho, the resulting income of the transaction or activity is apportionable income for Idaho. Income may be apportionable income even though the actual transaction or activity that gives rise to the income does not occur in Idaho.

03. Regular Course of the Taxpayer's Trade or Business. For a transaction or activity to be in the regular course of the taxpayer's trade or business, the transaction or activity need not be one that frequently occurs in the trade or business. Most, but not all, frequently occurring transactions or activities will be in the regular course of that trade or business and will, therefore, satisfy the transactional test. It is sufficient to classify a transaction or activity as being in the regular course of a trade or business, if it is reasonable to conclude transactions of that type are customary in the kind of trade or business being conducted or are within the scope of what that kind of trade or business does. However, even if a taxpayer frequently or customarily engages in investment activities, if those activities are for the taxpayer's mere financial betterment rather than for the operations of the trade or business, such activities do not satisfy the transactional test. The transactional test includes, but is not limited to, income from sales of inventory, property held for sale to customers, and services that are commonly sold by the trade or business. The transactional test also includes, but is not limited to, income from the sale of property used in the production of apportionable income of a kind that is sold or replaced with some regularity, even if replaced less frequently than once a year.