Ariz. Admin. Code § R15-2D-606
1. Averaging of monthly values will generally be required if substantial fluctuations in the values of the property exist during the tax period or if property is acquired after the beginning of the tax period or disposed of before the end of the tax period.
Example: The monthly value of the taxpayer’s property is as follows:
| January | $2,000 | July | $15,000 |
| February | $2,000 | August | $17,000 |
| March | $3,000 | September | $23,000 |
| April | $3,500 | October | $25,000 |
| May | $4,500 | November | $13,000 |
| June | $10,000 | December | $2,000 |
| Subtotal | $25,000 | Subtotal | $95,000 |
| Total | $120,000 |
The average monthly value of the taxpayer’s property includable in the property factor for the income year is $10,000 (120,000 divided by 12).
The Department may require or allow averaging of monthly values if that method is required to properly reflect the average value of a taxpayer’s property for the tax period. The Department shall not require the averaging of monthly values if that method has a de minimis effect on a taxpayer’s Arizona tax liability for the tax period.
Recodified at 6 A.A.R. 2308, filed in the Office of the Secretary of State June 2, 2000 (Supp. 00-2). Amended by final rulemaking at 7 A.A.R. 4973, effective October 5, 2001 (Supp. 01-4).