MidAmerican Energy Rate Selection Guide
MidAmerican Energy, a Berkshire Hathaway Energy subsidiary, is a regulated combination electric and gas utility serving about 829,000 electric and 444,000 gas customers across Iowa, Illinois, South Dakota, and Nebraska. It provides billing and usage data through its My Account portal, EDI for business customers, and authorization-form-based third-party access, but does not support Green Button or public APIs.
MidAmerican Energy Rate Schedule Comparison
| Schedule | Type | Rate | Best For |
|---|---|---|---|
| General Service (Electric) | commercial | Customer charge + per-kWh energy (seasonal); see Iowa tariff | Small to mid-size commercial loads |
| Large General Service (Electric) | industrial | Demand ($/kW) + energy (cents/kWh); see Iowa tariff | Larger demand-metered industrial facilities |
| General Energy TOU | commercial | ~7-21 cents/kWh on/off-peak (third-party benchmark) | Customers able to shift load off-peak |
| Gas Transportation | commercial | Per-therm delivery; supply via GasMAIN | Large gas users buying their own supply |
Market Overview
MidAmerican is a regulated vertically integrated combination utility. Iowa, South Dakota, and Nebraska electric customers receive bundled service with no competitive generation supplier choice; rates are set by the Iowa Utilities Commission and counterpart commissions. Illinois allows retail electric delivery choice, but most MidAmerican C&I load is bundled regulated service. Iowa electric base rates have been notably stable for decades under settlement agreements.
Need to pull your actual usage data to compare rates? See the MidAmerican Energy Data Access Guide →
Current Rate Schedules
MidAmerican C&I customers take regulated bundled rates set by the Iowa Utilities Commission (and counterpart commissions in IL/SD/NE). Iowa rate structures include general service (customer charge plus per-kWh energy charges) and large general service (demand-metered with per-kW demand charges plus energy charges), generally with summer/winter seasonal differentials. Iowa electric base rates have been stable for decades under settlement agreements; the most recent broad increase was a $135.6 million electric increase approved in 2014 and phased over three years. As of early 2026, average Iowa residential pricing is about 10.75 cents/kWh and commercial pricing is roughly 13 cents/kWh on a blended basis (third-party benchmark, not a tariff rate). Exact C&I charges, demand rates, and riders are published in MidAmerican's Iowa electric tariff filed with the Iowa Utilities Commission.
Effective: January 1, 2026 · Full Tariff Book →
| Schedule | Type | Applicability | Structure | Rate |
|---|---|---|---|---|
| General Service (Iowa Electric) | commercial | Small to mid-size commercial customers | Monthly customer charge plus per-kWh energy charges, typically with summer/winter seasonal differentials. See Iowa electric tariff for current values. | — |
| Large General Service (Iowa Electric) | industrial | Larger demand-metered commercial and industrial customers | Customer charge plus per-kW demand charges and per-kWh energy charges, with seasonal differentials. Demand-driven; values in the Iowa electric tariff. | — |
| General Energy Time-of-Use Service | commercial | Commercial customers electing time-of-use pricing | Time-differentiated per-kWh energy charges (on-peak vs. off-peak) plus customer charge; benchmark range roughly 7-21 cents/kWh per third-party data. | — |
| Illinois Electric C&I Service | commercial | Illinois commercial/industrial customers | Regulated delivery charges with optional retail supply choice; energy and demand components per the Illinois electric tariff. | — |
| Gas General/Transportation Service (Iowa) | commercial | Commercial and industrial gas customers (sales or transportation) | Customer charge plus per-therm delivery charges; transportation customers manage supply via GasMAIN. See Iowa gas tariff. | — |
Rate Recommendations by Use Case
Small to mid-size commercial (Iowa)
Smaller Iowa businesses on General Service should focus on usage efficiency and TOU load shifting since supply cannot be shopped.
Bundled regulated pricing means efficiency and time-of-use shifting are the primary cost levers.
- Export My Account usage to find waste
- Evaluate TOU if loads are flexible
- Use Business Energy Audit incentives
Large industrial / high-demand (Iowa)
Large demand-metered facilities should prioritize peak-demand management on Large General Service.
Per-kW demand charges dominate large-customer bills; shaving peaks lowers cost without supplier shopping.
- Stagger large equipment startups
- Target monthly demand peaks
- Request extended interval data from Business Advantage
Illinois C&I (delivery choice)
Illinois C&I customers can pair regulated MidAmerican delivery with a competitive retail supplier and pull interval data via the IL request form.
Illinois permits retail supply choice, so shopping the supply portion can reduce cost where MidAmerican only delivers.
- Request 15-minute interval data ($5/meter)
- Compare retail supplier offers
- Confirm delivery charges separately
Gas transportation customer
Large gas users should use GasMAIN to buy and schedule their own supply and monitor daily/hourly usage.
Transportation service lets large users procure commodity directly and manage nominations online.
- Register on GasMAIN
- Monitor hourly usage to refine nominations
- Coordinate with Gas Control
Historical Rate Trends
Iowa electric base rates have been unusually stable, frozen or near-flat for long periods under settlement agreements with the Iowa Office of Consumer Advocate. Natural gas rates are adjusted more frequently, including recent 2026 gas rate-case activity.
January 1, 2014
Iowa Utilities Board approved a $135.6 million electric rate increase (first in 16 years), phased in over three years; first base increase after rates held since the 1990s.
phasedApril 1, 2024
Iowa Utilities Commission approved an amended settlement in MidAmerican's natural gas rate increase case.
variesJune 1, 2026
MidAmerican natural gas rate increase notices approved and public meetings scheduled in 2026.
variesOverall trend: Electric base rates historically flat/stable; gas rates rising in 2024-2026
Next expected change: Ongoing 2026 natural gas rate-case proceedings; electric base rates governed by settlement
Cost Optimization Strategies
Because Iowa C&I customers cannot shop generation supply, the main savings levers are demand-charge management on large general service, shifting load to off-peak under time-of-use, and using interval data for efficiency and incentive programs.
Demand (kW) management
For: Demand-metered large general service C&I
Stagger equipment and shave monthly peaks to lower billed demand on large general service.
Time-of-use load shifting
For: TOU-eligible commercial customers
Move flexible loads to off-peak periods under General Energy Time-of-Use Service.
Efficiency incentive programs
For: Commercial, industrial, multifamily, agribusiness
Participate in Nonresidential Energy Solutions and Business Energy Audit programs for rebates and usage analysis.
Interval-data benchmarking
For: All C&I
Export My Account interval/usage data to identify peaks and verify savings; aggregate multi-meter data for portfolios.
To implement these strategies, you need your 15-minute interval data. Learn how to download MidAmerican Energy interval data →
Frequently Asked Questions
How does an Iowa business get interval (15-minute) usage data from MidAmerican?▾
Log in to My Account and open Usage/Usage History to view and export recent 15-minute interval data to CSV/Excel where AMI supports it. For older history, contact the Business Advantage team at 800-329-6261. Illinois suppliers use a dedicated interval data request form (about $5 per meter). MidAmerican does not offer Green Button or an automated interval API.
Can a consultant or aggregator pull our data automatically?▾
Not via API. MidAmerican has no public API and does not support Green Button Connect My Data. A third party must submit a signed Billing/Usage History Authorization (BillingHistoricalRequests@MidAmerican.com) or a General Customer Authorization, after which data is delivered manually (typically CSV/Excel within 5-10 business days). For ongoing enterprise billing, EDI 810/820 can be implemented.
What electric rate classes apply to C&I customers in Iowa?▾
Iowa C&I customers take regulated bundled service under MidAmerican's general service and large general service schedules. Smaller accounts pay a customer charge plus per-kWh energy charges; larger accounts are demand-metered with per-kW demand charges and energy charges, with seasonal (summer/winter) differentials. Exact charges are published in MidAmerican's Iowa electric tariff filed with the Iowa Utilities Commission.
Are MidAmerican's Iowa electric rates stable?▾
Historically, yes. MidAmerican's Iowa electric base rates have been unusually stable for decades under successive settlement agreements with the Iowa Office of Consumer Advocate; the company offsets cost increases with wholesale market revenue. A $135.6 million increase was approved in 2014 and phased over three years. Natural gas rates are adjusted more regularly, including a 2026 gas rate case. Always confirm current charges in the tariff.
How do gas transportation customers access usage data?▾
Through the GasMAIN portal (gasmain.midamericanenergy.com), where transportation customers can submit nominations and view daily and hourly gas usage history without manual requests. Support is available at 800-444-3123 or gascoordinator@midamerican.com.
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