20250131Exhibit B Customer Notice and Press Release.pdf

Important Notice for Idaho Electric and Natural Gas Customers DRAFT
On January 1,2025,Avista filed an application with the Idaho Public Utilities Commission(Commission)to
change Idaho electric and natural gas rates. These requests are primarily driven by ongoing capital investments
that maintain and upgrade Company infrastructure to meet customer expectations and continue to provide safe
and reliable service to our customers.
The proposal is a two-year rate plan which would increase electric revenues by$43.0 million or 14.4% effective
Sept. 1, 2025, and by $17.7 million or 5.2% effective Sept. 1, 2026. The request would increase natural gas
revenues by$8.8 million or 10.3%effective Sept. 1,2025, and by$1.0 million or 1.0%effective Sept. 1,2026.
More information on the requested price change is available at www.myavista.com/IDraterequests. The proposed
change above current billing rates by service schedule is as follows:
Electric
The proposed increase above current billing rates b service schedule is as follows:
Rate Schedule Proposed 2025 Proposed 2026
Billing Change Billing Change
Residential Service- Schedule 1 14.7% 5.3%
General Service- Schedules 11 & 12 14.2% 5.1%
Large General Service- Schedules 21 &22 14.1% 5.1%
Extra Large General Service- Schedule 25 14.3% 5.2%
Extra Large General Service- Schedule 25P 14.4% 5.2%
-Pumping Service- Schedules 31 & 32 14.1% 5.1%
Street&Area Lights- Schedules 41 -49 13.4% 4.9%
Total 14.4% 5.2%
Residential Customer Bills-Electric
Effective Sept. 1, 2025, residential customers using an average of 939 kilowatt hours per month would see their
monthly bills increase from $104.30 to $119.66, an increase of$15.36 or 14.7%per month. Included in that bill
change is a proposed increase in the basic monthly charge of$5.00,to a level of$25.00 per month.
Effective Sept. 1, 2026, residential customers using an average of 939 kilowatt hours per month would see their
monthly bills increase from $119.66 to $126.02, an increase of$6.36 or 5.3% per month. Included in that bill
change is a proposed increase in the basic monthly charge of$5.00,to a level of$30.00 per month.
Natural Gas
The proposed change above current billing rates b service schedule is as follows:
Rate Schedule Proposed 2025 Proposed 2026
Billing Change Billing Change
General Service- Schedule 101 10.3% 1.3%
-Large General Service- Schedules I I I & 112 10.3% 0.0%
Transportation Service- Schedule 146 10.3% 0.0%
Total 10.3% 1.0%
Residential Customer Bills-Natural Gas
Effective Sept. 1, 2025, residential customers using an average of 66 therms per month would see their monthly
bills increase by$6.29,from$60.63 to $66.92 or 10.4%.
Effective Sept. 1, 2026, residential customers using an average of 66 therms per month would see their monthly
bills increase from$66.92 to $67.80, an increase of$0.88 or 1.3%per month.
The actual percentage increase for electrical and natural gas customers will vary by customer rate group and
depend on how much energy a customer uses.

The Company's applications are proposals, subject to public review and a Commission decision. Copies of the
applications are available for public review at the offices of both the Commission and Avista, and on the
Commission's website(www.puc.idaho.gov).Customers may file with the Commission written comments related
to the Company's filings. Customers may also subscribe to the Commission's RSS feed
(http://www.puc.idaho.gov/rssfeeds/rss.htm)to receive periodic updates via e-mail about the case. Copies of rate
filings are also available on our website,www.myavista.com/rates.
The Commission has up to nine months to review the Company's rate increase requests. The Commission will
begin a comprehensive review of Avista's application and will seek public input.
If you would like to submit comments on the proposed rate changes (Case No.AVU-E-25-01 &AVU-G-25-01),
you can do so by going to the Commission website or mailing comments to:
Idaho Public Utilities Commission
P. O. Box 83720
Boise, ID 83720-0074
Avista offers a number of programs and services to help customers manage their energy use and costs. Visit
www.myavista.com for information on these programs which include Comfort Level Billing, bill payment
options, automated payment service, assistance programs, conservation tips, and energy efficiency rebates.
AVA670i

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Contact:
Media: Lena Funston [phone] lena.funston(a-)_avistacorp.com
Investors: Stacey Wenz [phone] stacey.wenz(aD_avistacorp.com
Avista 24/7 Media Access [phone]
Avista files multi-year electric and natural gas rate plan in Idaho
Company's filing seeks to recover infrastructure investments and expenses necessary to serve
customers.
SPOKANE, Wash. — Jan. 31, 2025, 1:05 p.m. PDT: Today, Avista (NYSE: AVA) has filed a
multi-year rate plan with the Idaho Public Utilities Commission (IPUC or Commission) that would
allow the Company to recover costs for fixed expenses and ongoing investments to infrastructure,
technology and more. If approved, new rates would be effective in Sept. 2025 and Sept. 2026.
"The cost of delivering safe and reliable energy includes maintaining and improving a massive
infrastructure made up of pipes, poles, dams, and substations as well as technology upgrades.
These expenses are necessary to ensure that we can continue to provide our customers with
safe, efficient, and reliable power. We're managing these expenses on behalf of our customers
because we understand the need to minimize the cost impact that our customers experience,"
said Avista President and CEO Heather Rosentrater.
"Keeping costs affordable for customers is at the forefront of our decisions. We aim to save our
customers money in a variety of ways, including implementing intentional purchase plans, offering
natural gas for the same price we pay, and continuing to be thoughtful in how we prepare our
generation mix. Even with these efforts in place, the costs to purchase power can and do fluctuate,
and we need to continue to invest hundreds of millions of dollars in our system every year to
continue providing safe, reliable service for our customers now and into the future," Rosentrater
said.
Avista's Requests
The proposal is a two-year rate plan, with new rates taking effect in Sept. 2025 and Sept. 2026.
This plan would create a stay-out period where Avista would not file a new general rate case for
new rates to be effective before Sept. 2027. This would provide customers with some predictability
in their expected future energy prices.
If approved, the electric general rate request is designed to increase annual base revenues by
$43.0 million (or 14.4% on a billed basis) effective on Sept. 1, 2025, and $17.7 million (or 5.2%
on a billed basis) effective on Sept. 1, 2026.
If approved, the natural gas general rate request is designed to increase annual revenues by$8.8
million (or 10.3% on a billed basis) effective on Sept. 1, 2025, and $1.0 million (or 1.0% on a billed
basis) effective on Sept. 1, 2026.

The electric and natural gas requests are based on a proposed rate of return (ROR) of 7.68%,
with a common equity ratio (CER) of 50%, and a 10.4% return on equity (ROE).
Infrastructure Investments
Avista needs to continue to replace infrastructure that has reached the end of its useful life, as
well as respond to the need for reliability and technology investments required to build the
integrated energy services grid that will take us into the future. Among the projects included in
today's filing are:
• Ongoing management, inspection, and replacement of 240,000 electric distribution wood
poles through Avista's wood pole management program to ensure poles and the
equipment on them support the company's ability to provide customers with safe and
reliable power.
• Continued investment in Avista's Wildfire Resiliency Plan, which outlines substantial steps
that Avista has taken to guard against the growing threat of wildfires including grid
hardening, enhanced vegetation management, and other industry-leading best practice
measures.
• The ongoing project to systematically replace portions of natural gas distribution pipe in
Avista's service area that were installed before 1987, as well as replacement of other
natural gas service equipment to strengthen the integrity, safety, and reliability of the
system.
• Technology upgrades that support necessary business processes and operational
efficiencies that allow Avista to effectively manage the utility and serve customers.
Idaho Residential Customer Bills
Electric
Effective Sept. 2025: Residential electric customers in Idaho using an average of 939 kilowatt
hours per month could expect to see a total billed increase of 14.7% or $15.36 for a revised
monthly bill of $119.66 from $104.30. The proposed monthly increase includes a $5 per month
proposed increase in the basic charge to a level of$25.00 per month.
Effective Sept. 2026: Residential electric customers in Idaho using an average of 939 kilowatt
hours per month could expect to see a total billed increase of 5.3% or$6.36 for a revised monthly
bill of$126.02 from $119.66. The proposed monthly increase includes a $5 per month proposed
increase in the basic charge to a level of$30.00 per month.
Natural gas
Effective Sept. 2025: Residential natural gas customers in Idaho using an average of 66 therms
per month could expect to see a total billed increase of 10.4% or$6.29 for a revised monthly bill
of$66.92 from $60.63.
Effective Sept. 2026: Residential natural gas customers in Idaho using an average of 66 therms
per month could expect to see a total billed increase of 1.3% or$0.88 for a revised monthly bill of
$67.80 from $66.92.
Proposed Changes by Service Schedule
The requested electric increase by service schedule is as follows:
Rate Schedule Sept. 2025 Sept. 2026
Billing Increase Billing Increase

Residential Service — Schedule 1 14.7% 5.3%
General Service - Schedules 11/12 14.2% 5.1%
Large General Service - Schedules 21/22 14.1% 5.1%
Extra Large General Service - Schedule 25 14.3% 5.2%
Extra Large General Service - Schedule 25P 14.4% 5.2%
Pumping Service - Schedules 31/32 14.1% 5.1%
Street & Area Lights - Schedules 41 —49 13.4% 4.9%
Total 14.4% 5.2%
The requested natural gas increase by service schedule is as follows:
Rate Schedule Sept. 2025 Sept. 2026
Billing Increase Billing Increase
General Service Schedule 101 10.3% 1.3%
Large General Service Schedules 111/112 10.3% 0.0%
Interrupt. Sales Service Schedules 131/132 0.0% 0.0%
Transportation Service Schedule 146 10.3% 0.0%
Total 10.3% 1.0%
The actual percentage increase for electric and natural gas customers will vary by customer rate
group and depend on how much energy a customer uses.
Customer Resources
To assist customers in managing their energy bills, Avista offers services for customers such as
comfort level billing, payment arrangements and Customer Assistance Referral and Evaluation
Services (CARES), which provide assistance to special-needs customers through referrals to
area agencies and churches for help with housing, utilities, medical assistance and other needs.
Avista provides energy efficiency and outreach programs that include rebates and incentives as
well as tips and resources to help customers manage their energy use and energy bills.
Customers can learn more at www.myavista.com.
Rate Application Procedure and Additional Information
Avista's application is a proposal, subject to public review and a Commission decision. Copies of
the applications are available for public review at the offices of both the Commission and Avista
and on the Commission's website (www.puc.idaho.gov). Customers may file with the Commission
written comments related to the Company's filing. Customers may also subscribe to the
Commission's RSS feed (https://puc.idaho.gov/RssPage) to receive periodic updates via e-mail
about the case. Copies of the rate filing is also available on our website, www.myavista.com/rates.
The Commission will begin a comprehensive review of Avista's application and will seek public
input. If you would like to submit comments on the proposed increase (Case No. AVU-E-25-01
and AVU-G--01), you can do so by going to the Commission website or mailing comments to:
Idaho Public Utilities Commission
P. O. Box 83720
Boise, ID 83720-0074
About Avista Corp.
Avista Corp. is an energy company involved in the production, transmission and distribution of
energy as well as other energy-related businesses. Avista Utilities is our operating division that

provides electric service to 420,000 customers and natural gas to 381,000 customers. Our service
territory covers 30,000 square miles in eastern Washington, northern Idaho and parts of southern
and eastern Oregon, with a population of 1.7 million. AERC is an Avista subsidiary that, through
its subsidiary AEL&P, provides retail electric service to 18,000 customers in the city and borough
of Juneau, Alaska. Our stock is traded under the ticker symbol "AVA". For more information about
Avista, please visit www.avistacorp.com.
This news release contains forward-looking statements regarding the company's current
expectations. Forward-looking statements are all statements other than historical facts. Such
statements speak only as of the date of the news release and are subject to a variety of risks and
uncertainties, many of which are beyond the company's control, which could cause actual results
to differ materially from the expectations. These risks and uncertainties include, in addition to
those discussed herein, all of the factors discussed in the company's Annual Report on Form 10-
K for the year ended Dec. 31, 2023 and the Quarterly Report on Form 10-Q for the quarter ended
September 30, 2024.
SOURCE: Avista Corporation
-2504-
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