What happened to the Iowa credit
The Iowa Solar Energy System Tax Credit was worth 50 percent of the federal credit for qualified installations, so when the federal credit was 30 percent the Iowa credit effectively added another 15 percent of system cost.
It ran against an annual aggregate cap of $5 million across residential and commercial claims. When claims exceeded the cap, applicants went onto a waiting list rather than being paid.
It then expired for residential installations completed after December 31, 2021. The money set aside had already been spent, and applicants still on the waiting list did not receive it. More than 1,400 applications were ultimately denied.
There is no successor programme. A quote listing an Iowa solar tax credit is describing something that has not existed for a residential installation in years.
The lesson worth carrying forward
The Iowa experience is a useful reminder that a capped, first-come incentive is not the same as an entitlement. Meeting every criterion is not sufficient if the fund is exhausted.
That applies wherever you see an incentive with an annual budget. New Mexico credit runs against a $30 million cap, Oregon state rebate was fully reserved within days of reopening, and Eugene municipal programme has an annual budget that was mostly allocated by mid-year.
The practical rule is to treat any capped incentive as contingent until it is actually secured, and to ask what your arithmetic looks like without it.
In Iowa the question is moot for the state credit, since it is gone. But it is worth applying to anything else a quote includes that has a budget attached.
What Iowa still offers
A full sales tax exemption on solar energy equipment, which is automatic and appears as an absence from your quoted price rather than as a line item.
A five-year property tax exemption on the added value of the system. Note the term: five years, not the life of the system, and shorter than the twenty years Rhode Island allows.
Inflow-outflow billing under Iowa Code Section 476.49, with outflow credits carrying forward, subject to the value of solar review triggered by 5 percent penetration or a utility petition after July 1, 2027.
And the electricity you stop buying, at an Iowa residential average around 12.7 cents per kWh. That last item is the largest and the one that does not depend on any programme staying open.
The pieces to separate in a projection
Strike the Iowa solar tax credit from any quote showing it, since it expired for residential installations completed after December 31, 2021.
Strike the federal residential credit too, since Section 25D expired for property placed in service after December 31, 2025. Section 48E survives at 30 percent but is claimed by a third-party owner under a lease or power purchase agreement.
Rebuild from the sales tax exemption, the five-year property tax exemption, avoided inflow at your retail rate, and outflow credits under your utility tariff.
Ask for that version in writing with each line named and the five-year property tax term stated rather than implied to run for the life of the system.