Oregon natural gas rate hikes begin October 31, adding about $6.30 a month to a typical NW Natural residential bill. Cascade Natural Gas and Avista customers also face increases approved by state regulators. The changes affect households entering the heating season, with bill estimates, cost details and available assistance explained below.
Key Takeaways
- NW Natural residential rates rise approximately 7.3% on October 31, 2026
- A typical customer using 54 therms monthly could pay about $6.30 more
- Cascade Natural Gas and Avista increases reach 10.7% and 8.5%, respectively
- Oregon restricts residential gas and electricity rate increases from November 1 through March 31
The Oregon Public Utility Commission approved the changes October 28 for three major natural gas providers. For Portland-area customers, NW Natural’s new rate starts Saturday, although the amount on each bill will depend on consumption rather than a fixed monthly surcharge.
Oregon Natural Gas Rate Hikes Affect Three Utilities
NW Natural serves more than 700,000 customers in northwest Oregon. Its 7.3% increase translates to an estimated $6.30 more each month for a household using 54 therms, a unit measuring gas energy. Higher or lower usage can change that dollar amount, as can the length of a billing period.
The October 31 effective date applies to NW Natural’s residential customers. Nonresidential rates begin November 1. A small commercial customer using 274 therms monthly could pay approximately $43.10 more under the company’s published estimate, although business charges vary by usage and rate classification.
Cascade Natural Gas customers using 57 therms monthly face an increase of approximately $7.38, or 10.7%. Cascade serves roughly 86,000 customers, primarily in central and eastern Oregon. Its new rates combine a gas purchasing adjustment with a broader review of utility expenses. The gas adjustment remains subject to further review and a possible customer refund.
Avista customers using 45 therms a month will see an estimated $5.83 increase, or 8.5%, according to the commission’s October 28 notice. Avista serves about 106,500 customers in southwest and northeast Oregon. Because each estimate assumes different gas usage, the dollar figures are not directly comparable.
These natural gas changes are separate from earlier Oregon electricity rate increases in 2026. They apply to customers of the named gas providers, not every Portland household.
Warm Winter and Pipeline Work Factor Into NW Natural’s Rates
NW Natural’s increase combines two regulatory decisions. The annual Purchased Gas Adjustment reflects anticipated wholesale gas costs and reconciles earlier estimates with actual expenses. The Oregon Public Utility Commission says those purchasing costs pass through to customers without an added profit margin on that component.
The commission attributed part of the increase to lower gas use during the previous unusually warm winter. Differences between forecast and actual costs feed into the next annual adjustment.
The separate Alternative Rate Mechanism permits recovery of eligible expenses for recently completed utility projects. Regulators approved a settlement that reduced NW Natural’s requested annual revenue increase to about $13 million. That figure concerns the utility’s authorized revenue, not a surcharge on each household bill.
The covered projects include measures to address landslide risks along the Coos County Pipeline. The commission says the agreement removed or adjusted some costs, incorporated contributions from Coos County and limited what the company could recover. Together, the mechanisms produced the approved residential rate increase.
The October 31 start date also precedes Oregon’s seasonal restriction on new residential gas and electricity rate increases. State law prevents such increases from taking effect between November 1 and March 31. Monthly bills can still change during that period when households use different amounts of energy.
Portland Customers Can Access Discounts and Payment Assistance
Against rising Oregon household costs, the commission’s estimate provides a reference point for one monthly expense. Customers comparing statements can check gas consumption in therms, billing dates and current charges to understand their individual changes.
NW Natural offers income-qualified bill discounts of 15% to 85% on eligible monthly gas charges for Oregon households. Discount levels depend on income. The company says no proof of income is required with the application, which can be submitted online, by email, mail or phone.
Applications may take up to 30 days to process. Discounts start on the first bill after enrollment, do not apply retroactively and exclude certain charges. Eligible customers may also receive assistance through other programs while enrolled in the discount plan.
NW Natural provides information about payment arrangements at 800-422-4012. Local community action agencies can explain other assistance options, subject to eligibility and funding. Energy Trust of Oregon also provides information about energy efficiency and available rebates.
Frequently Asked Questions
When do the new Oregon natural gas rates take effect?
The Oregon natural gas rate hikes begin October 31, 2026, for residential customers of NW Natural, Cascade Natural Gas and Avista. NW Natural’s revised nonresidential rates start November 1.
How much more will a typical Portland household pay?
NW Natural estimates an increase of $6.30 per month for a residential customer using 54 therms. Actual bills depend on consumption and billing details.
Why are NW Natural’s rates increasing?
The changes combine an annual adjustment of gas purchasing costs with charges for approved utility projects. The commission also cited lower gas use during the previous unusually warm winter.
Can customers get help paying higher gas bills?
Eligible NW Natural customers in Oregon can apply for income-based bill discounts of 15% to 85% on qualifying charges. Payment arrangements and other assistance may also be available.
