Iowa Admin. Code r. 701-203.6
When the sale of tangible personal property includes a charge for installation of the personal property sold, the current rate of tax shall be measured on the entire sales price from the sale. The installation charges would not be taxable if the installation service is not an enumerated service, and where a sales agreement exists, the installation charges are separately contracted. If the written contract contains no provisions separately itemizing such charges, tax is due on the full contract price with no deduction for installation charges, whether or not such installation charges are itemized separately on the invoice.
If the installation services are enumerated services, the installation charges would not be taxable if (1) the services are exempt from tax (e.g., the services are performed on or connected with new construction, reconstruction, alteration, expansion or remodeling of a building or structure); or the services are rendered in connection with the installation of new industrial machinery or equipment, and (2) where a sales agreement exists, the installation charges are separately contracted. If the written contract contains no provisions separately itemizing such charges, tax is due on the full contract price with no deduction for installation charges, whether or not such installation charges are itemized separately on the invoice. If no written contract exists, the installation charges must be separately itemized on the invoice to be exempt from tax. See rule 701-219.13 (423).
This rule is intended to implement Iowa Code sections 423.1(47)"a"(5) and 423.1(47)"b"(4).
Iowa Admin. Code r. 701-203.6