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Interest Rates
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October 15, 2009 - FERC revises its regulations governing interest rates used in calculating refunds to reflect a change in the Federal Reserve's publications. The methods for calculating refunds or for determining the applicable interest rates are not being altered in any way. Order No. 727 PDF


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
  • 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)
    Third Quarter 2014 3.25% Sep .0027 .0027
        Aug .0028  
        Jul .0028  
    Second Quarter 2014 3.25% Jun .0027 .0027
        May .0028  
        Apr .0027  
    First Quarter 2014 3.25% Mar .0028 .0027
        Feb .0025  
        Jan .0028  
    Fourth Quarter 2013 3.25% Dec .0028 .0027
        Nov .0027  
        Oct .0028  
    Third Quarter 2013 3.25% Sep .0027 .0027
        Aug .0028  
        Jul .0028  
    Second Quarter 2013 3.25% Jun .0027 .0027
        May .0028  
        Apr .0027  
    First Quarter 2013 3.25% Mar .0028 .0027
        Feb .0025  
        Jan .0028  
    Fourth Quarter 2012 3.25% Dec .0028 .0027
        Nov .0027  
        Oct .0028  
    Third Quarter 2012 3.25% Sep .0027 .0027
        Aug .0028  
        Jul .0028  
    Second Quarter 2012 3.25% Jun .0027 .0027
        May .0028  
        Apr .0027  
    First Quarter 2012 3.25% Mar .0028 .0027
        Feb .0026  
        Jan .0028  
    Fourth Quarter 2011 3.25% Dec .0028 .0027
        Nov .0027  
        Oct .0028  
    Third Quarter 2011 3.25% Sep .0027 .0027
        Aug .0028  
        Jul .0027  
    Second Quarter 2011 3.25% Jun .0027 .0027
        May .0028  
        Apr .0027  
    First Quarter 2011 3.25% Mar .0028 .0027
        Feb .0025  
        Jan .0028  
    Fourth Quarter 2010 3.25% Dec .0028 .0027
        Nov .0027  
        Oct .0028  
    Third Quarter 2010 3.25% Sep .0027 .0027
        Aug .0028  
        Jul .0028  
    Second Quarter 2010 3.25% Jun .0027 .0027
        May .0028  
        Apr .0027  
    First Quarter 2010 3.25% Mar .0028 .0027
        Feb .0025  
        Jan .0028  
    Fourth Quarter 2009 3.25% Dec .0028 .0027
        Nov .0027  
        Oct .0028  
    Third Quarter 2009 3.25% Sep .0027 .0027
        Aug .0028  
        Jul .0028  
    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  
 

CONTACT
Tracy DeMarr
Telephone: 202-502-8187
Email: Tracy.DeMarr@ferc.gov
 
INTEREST RATES ARCHIVE



Updated: June 5, 2014