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Federal Energy Regulatory Commission



 
Interest Rates
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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 External Links of the Commission's regulations. Section 35.19a, subsection (iii)(A) provides that “[t]he applicable average prime rate for each calendar quarter shall be the arithmetic mean, to the nearest one-hundredth of one percent, of the prime rate values published in the Federal Reserve Bulletin, or in the Federal Reserve's “Selected Interest Rates” (Statistical Release H. 15), for the fourth, third, and second months preceding the first month of the calendar quarter.”
  • Gas Interest Rates are Calculated in Accordance with Section 154.501(d) External Links of the Commission's regulations and its predecessors
  • Oil Interest Rates are Calculated in Accordance with Section 340.1(c)(2) External Links of the Commission's regulations
    Applicable Annual Quarter Annual Rate Monthly Rate
    (Annual % / 365dx # days in month) 1
    Monthly Rate
    (Annual Rate / 12 Months)
    Fourth Quarter 2018 4.96% Dec .0042 .0041
        Nov .0041  
        Oct .0042  
    Third Quarter 2018 4.69% Sep .0039 .0039
        Aug .0040  
        Jul .0040  
    Second Quarter 2018 4.47% Jun .0037 .0037
        May .0038  
        Apr .0037  
    First Quarter 2018 4.25% Mar .0036 .0035
        Feb .0033  
        Jan .0036  
    Fourth Quarter 2017 4.21% Dec .0036 .0035
        Nov .0035  
        Oct .0036  
    Third Quarter 2017 3.96% Sep .0033 .0033
        Aug .0034  
        Jul .0034  
    Second Quarter 2017 3.71% Jun .0030 .0031
        May .0032  
        Apr .0030  
    First Quarter 2017 3.50% Mar .0030 .0029
        Feb .0027  
        Jan .0030  
    Fourth Quarter 2016 3.50% Dec .0030 .0029
        Nov .0029  
        Oct .0030  
    Third Quarter 2016 3.50 % Sep .0029 .0029
        Aug .0030  
        Jul .0030  
    Second Quarter 2016 3.46%        Jun .0028 .0029
        May .0029  
        Apr .0028  
    First Quarter 2016 3.25%        Mar .0028 .0027
        Feb .0026  
        Jan .0028