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This is provided as information to all utilities. The Public Service Commission (PSC) adopted rules allowing the interest rate paid on customer deposits held by Wisconsin utilities to change annually. This came about primarily in response to changing economic conditions. As a result, each December, the PSC establishes the interest rate that will apply for the following calendar year.

The administrative code provision covering the interest rate and how it is determined reads as follows:

The rate shall be equal to the weekly average yield of one-year United States Treasury securities adjusted for constant maturity for the week ending on or after December 1, made available by the Federal Reserve Board, rounded to the nearest tenth of one percent.

Therefore, the PSC sets the interest rate for calendar year 2012 at 0.10 percent.

The history of the annual interest rates on customer deposits may be viewed in the following pdf. (8kb)

If you have any questions on this matter, please contact Consumer Affairs Analyst Diane Mandell at 608-261-9419 (e-mail address: Diane.Mandell@wisconsin.gov).