Legal Resources 
Interest Rates
The Commission, on a quarterly basis, publishes interest rates
for oil, natural gas, and electricity for determination of refund
purposes. The interest rates on this page as well as the archived
rates are the same for oil, natural gas, and electricity. Please
note that the interest rates for oil apply only as far back as
1983.
- Electric Interest Rates are Calculated
in Accordance with Section
35.19a
of the Commission's regulations - Gas Interest Rates are Calculated in Accordance
with Section
154.501(d)
of the Commission's regulations and its predecessors
- Oil Interest Rates are Calculated in Accordance
with Section
340.1(c)(2)
of the Commission's regulations
| Applicable Annual Quarter | Annual Rate | Monthly Rate (Annual % / 365dx # days in month) 1 |
Monthly Rate (Annual Rate / 12 Months) |
|---|---|---|---|
| Second Quarter 2009 | 3.37% | Jun .0028 | .0028 |
| May .0029 | |||
| Apr .0028 | |||
| First Quarter 2009 | 4.52% | Mar .0038 | .0038 |
| Feb .0034 | |||
| Jan .0038 | |||
| Fourth Quarter 2008 | 5.00% | Oct .0042 | .0042 |
| Nov .0041 | |||
| Dec .0042 | |||
| Third Quarter 2008 | 5.30% | Jul .0045 | .0044 |
| Aug .0045 | |||
| Sep .0044 | |||
| Second Quarter 2008 | 6.77% | Jun .0056 | .0056 |
| May .0057 | |||
| Apr .0056 | |||
| First Quarter 2008 | 7.76% | Mar .0066 | .0065 |
| Feb .0062 | |||
| Jan .0066 | |||
| Fourth Quarter 2007 | 8.25% | Oct. .0070 | .0069 |
| Nov. 0068 | |||
| Dec. .0070 | |||
| Third Quarter 2007 | 8.25% | Sep .0068 | .0069 |
| Aug .0070 | |||
| Jul .0070 | |||
| Second Quarter 2007 | 8.25% | Jun .0068 | .0069 |
| May .0070 | |||
| Apr .0068 | |||
| First Quarter 2007 | 8.25% | Mar .0070 | .0069 |
| Feb .0063 | |||
| Jan .0070 |
