Updated November 2026 by Wolf River Electric, an Iowa solar installer with an office in Marion.
Ready for the next step? Learn about solar incentives by state from Wolf River Electric, or get a free quote.
Iowa solar incentives at a glance (November 2026)
| Program | What you get | Who qualifies | Status |
|---|---|---|---|
| Sales tax exemption | No Iowa sales tax on solar equipment | Everyone | Ongoing |
| Property tax exemption | The value solar adds to your home is not taxed for 5 years | Homeowners who file with the county assessor | Ongoing |
| Inflow-outflow billing, MidAmerican Energy | Credit at the retail volumetric rate for power you send to the grid | MidAmerican customers | Open; rate locked for 20 years |
| Inflow-outflow billing, Alliant Energy | Credit at the retail volumetric rate, up to 110% of your yearly use | Alliant customers | Open; rate locked for 20 years |
| City utility rebates | Ames Electric Services: $500 per kW installed in 2026 | Customers of that utility | Check your utility |
| Co-ops and other city utilities | Each sets its own buyback rules | Depends on the utility | Check your utility |
| Iowa solar tax credit | State income tax credit | Residential installs are no longer eligible | Ended after 2021 |
| Federal 25D tax credit | 30% of system cost | Homeowner-owned systems | Ended December 31, 2025 |
| Lease or prepaid lease | The leasing company claims the 30% commercial credit and passes savings to you | Homeowners who lease | Available for a limited time |
How do MidAmerican and Alliant credit your solar?
Iowa’s two investor-owned utilities, MidAmerican Energy and Alliant Energy (Interstate Power and Light), bill new solar homes with inflow-outflow billing under Iowa Code 476.49. Your meter tracks power in 15-minute periods. You pay for the power you draw from the grid (inflow) and earn a credit for the power you send out (outflow).
| Rule | MidAmerican Energy | Alliant Energy |
|---|---|---|
| Credit for power you send out | Retail volumetric rate, including riders | Retail volumetric rate, including riders |
| How long the rate is locked | 20 years, under Iowa law | 20 years, under Iowa law |
| Unused credits | Carry forward, then expire at your annual date (January or April) | Carry forward, then expire at your annual date (January or April) |
| Size limit for full credit | Set by interconnection rules; we size to your yearly use | Up to 110% of your yearly use; the rest earns a lower avoided cost rate |
Because unused credits expire once a year, a system sized to your own yearly use pays best. Iowa law allows a value-of-solar review as soon as 2027, which could change the credit for systems installed after it. Systems installed before then keep their locked rate for 20 years.
Rural co-ops and city utilities are not covered by that law and set their own rules. Some credit exports below retail. We check your utility’s current tariff before we size your system.
Sales tax exemption
Solar panels, inverters and mounting equipment are exempt from Iowa sales tax. It is handled on your invoice, so there is nothing to file.
Property tax exemption
Iowa exempts the value a solar system adds to your home from property tax for five full assessment years. You file the exemption with your county assessor after the system is installed; ask the assessor’s office for the current form and deadline. After five years the system is assessed like any other improvement.
What ended: the Iowa solar tax credit and the federal credit
Iowa used to offer a state income tax credit for home solar. Residential installations are no longer eligible; the last homes that qualified were installed in 2021. Source: Iowa Department of Revenue.
The federal Residential Clean Energy Credit (Section 25D) let homeowners take 30% of the system cost off their federal taxes. It ended for systems installed after December 31, 2025. If you buy with cash or a loan in 2026, there is no federal credit. A solar lease or prepaid lease lets the leasing company claim the 30% commercial credit and pass savings to you in the price. Read more in what changed with the solar tax credit.
Utility rebates in Iowa
MidAmerican and Alliant do not pay a rebate for home solar in 2026. Some city utilities do: Ames Electric Services pays $500 per kW (DC) for systems installed in 2026, according to the City of Ames. Alliant customers with a home battery can earn Smart Hours payments: a $100 per kWh enrollment bonus plus yearly payments for grid events. See home battery backup for our installed battery prices.
Example: what the incentives are worth on a 10 kW system
This example uses public averages, not a quote. A 10 kW system at EnergySage’s Iowa average of $3.26 per watt (as of October 2026) costs about $32,600 before incentives.
| Incentive | What it is worth |
|---|---|
| No sales tax on the equipment | Roughly $1,200 to $1,500 |
| Retail credit for power you use or send out | About $1,650 a year in power you no longer buy, if the system is sized to your use |
| Property tax exemption | No increase for five years |
| Prepaid lease | About 30% off the price through the commercial credit |
See the full numbers, including bill savings and return on net cost for buying and for a prepaid lease, in solar panel cost in Iowa and are solar panels worth it in Iowa, or run your own in the free solar calculator.
Iowa solar incentive questions
Does Iowa have a solar tax credit in 2026?
No. The state credit ended after 2021, and the federal credit for homeowner-owned systems ended after 2025. The sales tax and property tax exemptions and retail-rate bill credits remain.
Does MidAmerican Energy offer net metering?
MidAmerican uses inflow-outflow billing: you earn a credit at the retail volumetric rate for power you send out, locked for 20 years. Unused credits expire at your annual date.
Does Alliant Energy pay for the power I send back?
Yes. Alliant also uses inflow-outflow billing at the retail volumetric rate, up to 110% of your yearly use, locked for 20 years.
Will solar raise my property taxes in Iowa?
Not for the first five years, if you file the exemption with your county assessor.
Can I still get the 30% credit with a lease?
The leasing company claims the commercial credit and passes savings to you in the price. Ask us about a prepaid lease.
Get every incentive built into your quote
A Wolf River Electric advisor checks your utility’s tariff, your assessor’s exemption and every program you qualify for, then shows your bill savings and return on net cost for buying and for a prepaid lease. Our own crews install across Iowa, with an office in Marion. Get a free Iowa solar quote.
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