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Net billing or inflow-outflow billing (Iowa Code 476.49)

  • Each rate-regulated electric utility files either a net billing tariff or an inflow-outflow billing tariff. Source: https://www.legis.iowa.gov/docs/code/2026/476.49.pdf (Iowa Code 2026; accessed 2026-10-20)
  • Under inflow-outflow billing, until the Iowa Utilities Commission approves a value-of-solar rate, outflow is bought at the applicable retail volumetric rate (including approved riders). That rate holds for a 20-year term, even if ownership changes or a value-of-solar rate is adopted later. Source: same (accessed 2026-10-20)
  • Date-sensitive: a utility can petition for a value-of-solar methodology after July 1, 2027, or once statewide distributed generation penetration reaches 5%. New systems after that could be compensated differently. Source: same (accessed 2026-10-20)

Little else at the state level

We didn't find a statewide incentive as of October 2026.

A note on the federal tax credit

The federal residential clean energy credit (25D) doesn't apply to expenditures made after December 31, 2025. The IRS treats an expenditure as made when installation is completed. Source: https://www.irs.gov/newsroom/faqs-for-modification-of-sections-25c-25d-25e-30c-30d-45l-45w-and-179d-under-public-law-119-21-139-stat-72-july-4-2025-commonly-known-as-the-one-big-beautiful-bill-obbb (accessed 2026-10-20). This page isn't tax advice.

Is solar worth it in Iowa?

It depends on your bill, roof and utility rules. Here is an estimate for a home with a $150 monthly electric bill and a south-facing, unshaded roof, before any incentives:

  • Residential electricity averaged an estimated 14.20¢/kWh in Iowa (January–July 2026), below the U.S. average of 18.19¢ (39 of 51, highest first). Source: EIA Electric Power Monthly, Table 5.6.B (accessed 2026-10-20)
  • Small rooftop systems in Iowa produced an estimated 1,544 kWh per kW of panels in 2024 (2024 small-scale solar generation divided by average 2023–2024 small-scale capacity). Source: EIA Electric Power Annual 2024, Tables 3.21 and 4.7.B (accessed 2026-10-20)
  • Estimated system size: 6.4–8.6 kW, producing about 11,580 kWh a year (estimated).
  • Estimated installed cost: $22,500–$39,000 before incentives, using $3.00–$5.20 per watt. Source: Lawrence Berkeley National Laboratory (2024 installed prices, 20th–80th percentile; accessed 2026-10-20)
  • Estimated simple payback: 12–28 years. Savings depend on how your utility credits exported energy (see above).

Estimates only, based on public data and simple assumptions. Actual production, cost, and savings vary by home, utility, rate plan, and installer. Not a quote, and not a guarantee of savings. Ask your installer about any state, local, or utility incentives that apply. State and local programs: DSIRE.

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