Customer Deposit Interest Rates

NOTICE: Our Consumer Protection Helpline is unavailable, and we are unable to take calls, get voicemails, or call anyone back. We will return calls once the issue is fixed.

In the meantime, share your complaints by email to consumer@utc.wa.gov. We apologize for the inconvenience and appreciate your patience.

Laws And Rules

Commission rules set the customer deposit interest rate at the level of the one-year Treasury Constant Maturity, as calculated by the U.S. Treasury and published in the Federal Reserve's Statistical Release H.15.

Telephone and Water Companies

As of Nov. 15, 2025, the interest rate that telephone and water companies must pay on the deposits they hold for their customers is 3.69%.

For each calendar year, telephone and water company rules use the rate as of Nov. 15 of the previous year.

Gas, Electric and Solid Waste Companies

As of Jan. 15, 2025, the interest rate that gas, electric, and solid waste companies must pay on the deposits they hold for their customers is 4.19%.

Gas, electric, and solid waste company rules use the rate as of Jan. 15, 2025.