2017 Transmission costs were implemented February 1, 2017.

Regional Transmission Service Q&A

What is Regional Transmission Service (RTS)? 
Transmission is the high-voltage lines that carry power long distances between power plants and the neighborhood substations that serve our customers. The RTS line item reflects only the actual cost of this service.
What is the impact to my bill? 
The average electric bill is made up of several parts. One of which is the cost for transmission service, labeled Regional Transmission Service (RTS). Because RTS only makes up only one part of your total bill, the overall impact on bills is much smaller, and will vary depending on customer class.

Here is the percentage increase for the RTS for each customer class for 2018:
CUSTOMER CLASS RTS RATE Unit rts rate  2016  rts factor 2017 % Change  rts component of overall bill* overall estimated bill impact 
$/kWh 0.02858 0.02788 -2.4%  19% -0.5%
General Service $/kWh 0.02837 0.02839 0.1%  20%  0.1%
Large General Service
$/kWh 7.99 7.99 0  22%  0.0%
*Percentage of total transmission to total annual bill. 
How often will the rates for the transmission costs change? 
Costs for transmission service are subject to the authority of the Federal Energy Regulatory Commission. Alliant Energy adjusts its charges annually to reflect any changes which have occurred for these transmission costs. The charge is per unit of energy you use, so the actual cost adjusts annually based on your usage and any change in the charge.
Why have transmission costs been increasing? 
Transmission costs are increasing for all utilities. There are a significant number of transmission lines being built or upgraded. Such investments are needed to increase the ability to provide reliable power, integrate renewable resources and reduce costs to transmit power across the region, update an aging system, and in response to evolving regulation on planning, cost allocation, and environmental compliance.

View the 2017 Transmission Bill insert.pdf

Regional transmission service refund


Alliant Energy’s Iowa utility does not own the transmission system in Iowa. The owners of this system charge Alliant Energy, and in turn its customers, to use the transmission system in Iowa.

Alliant Energy’s Iowa electric customers are receiving a refund because of a recent complaint filed against the owners of the transmission system. The complaint asserted that the transmission owners charged too much for their Return on Equity from 2013 – 2015.

In 2017, the Federal Energy Regulatory Commission (FERC) approved the refund for a portion of the costs charged by the transmission owners.
Customers will see a separate line item on their bill labeled “Regional Transmission Service Refund.”
The refunds will appear on customer bills from May of 2017 through the end of 2017.

The refund equates to a $3.60 bill credit per month through the end of the year for a typical residential customer, based on usage of 750 kWh per month.

Our plan to distribute the refunds takes several items into account, including projected energy usage, demand and how much each class of customers has already paid for transmission service. This plan was reviewed and approved by the Iowa Utilities Board.

The total breakdown among all customer classes shown in the table below are the refund amounts:

Customer rate class  Refund total 
Residential  $11,361,202 
General Service  $6,421,053  
Large General Service  $16,437,839  
Lighting  $254,445  
Standby   $1,830,146 
TOTAL  $36,304,685