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Customer Deposit Interest Rates


PUC Approved Interest Rate on Customer Deposits

Many public utilities offering telephone, energy and water services to residential and commercial customers in the State of Colorado have the provisions in their tariffs that allow the utility to require customers to maintain a deposit with the utility to ensure payment of services. If your utility requires such deposits, it is required to pay simple interest on those customer deposits as prescribed by Commission rules. 

See Telecommunications rule: 723-2-2302, Electric rule 723-3-3403 . Gas rule 723-4-4403 and Water rule 723-5-5403.

Interest Rate on Customer Deposits


For calendar year 2014, the rate is 0.34%

For calendar year 2015, the rate will remain at 0.34%.
(The basis point differential is less than 25 points.)


See notice regarding 2014 rate - Customer Deposits Interest Rate for 2014 pdf file

See notice regarding 2015 rate - Customer Deposits Interest Rate for 2015 pdf file

For additional information and to facilitate any tariff changes, the Commission issued the corresponding Decisions

Please submit your advice letter as a NEW Advice Letter filing.  Proceeding number found on the Decision. 

Please DO NOT file your advice letter in the miscellaneous proceeding associated with the following listed decisions. Reference to the respective Decision is required on the tariff pages accompanying your advice letter.

please reference
decision and proceeding numbers =>
click to link => to proceedings

Electric Utilities

Decision C 14-1335

Proceeding No. 14M-1079E

Gas Utilities

Decision Cl4-1336

Proceeding No. 14M-1080G

Water Utilities

 Decision Cl4-1339

Proceeding No. 14M-1082W

Telecommunications Providers

 Decision Cl4- 1337

Proceeding No. 14M-1081T

  • Please reference the respective Commission Decision Number on the tariffs accompanying your advice letter. The advice letter filing is a compliance filing.
Staff contact

If you have any questions regarding the applicability of the interest rate on deposits, the manner in which the rate is calculated, or any other issues relating to this letter, please contact Sandi Kahl at 303-894-2873 or sandi.kahl@state.co.us



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(303) 894-2000 - Phone (800) 888-0170 - Permits and Insurance (800) 456-0858 - Consumer Assistance (303) 894-2065 - Fax