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Alert The Tax Division Offices are open to the public effective July 12, 2021. Our public hours are 8a – 4p Monday to Friday (excluding State Holidays). This includes both the Juneau and Anchorage offices and lobbies. Please call (907)269-6620 for assistance

The Tax Public Web and Revenue Online sites will be down Sunday, September 19th from 7:00 AM to 11:00 AM AKDT due to maintenance.




15 AAC 55.171 (m) specifies how the average spot price for ANS at the US West Coast during a month is to be calculated for purposes of determining prevailing value. For the convenience of taxpayers and the public, the Tax Division calculates the average spot price each month and publishes the result on this web page. However, the Division does not guarantee the accuracy of these calculations, and in the event of a discrepancy between a calculation published here and the true average spot price as provided by the regulation, the provisions of the regulation control.



$ Per Barrel202120202019201820172016201520142013201220112010200920082007200620052004
January55.56465.47760.39669.14753.90430.21948.874103.819109.876111.87192.55779.33539.01191.15951.52362.84641.12533.100
February61.88254.47865.02366.20254.72431.13953.845106.297112.757119.64796.78676.74142.77694.42256.99859.26243.58933.660
March65.59933.21267.94266.60351.81338.10252.279107.907108.930122.678115.34179.45147.747105.06359.00760.60750.63235.505
April65.02216.54272.15771.03353.33741.79458.486107.362104.576120.945120.86082.23246.558112.37063.91667.73749.74935.430
May67.44728.21070.30476.12150.72046.61464.373108.060104.423110.546113.56774.23158.234125.41264.75569.31646.77239.066
June73.17941.78364.32074.74647.37847.39964.401110.757104.00698.063111.07975.66469.797133.77669.10969.50053.67436.729
July74.24043.55565.99476.19349.18444.06656.197107.634111.341103.748114.46976.52964.530132.88075.93073.10456.67139.440
August70.28043.36061.13973.81851.36744.16848.257101.778110.568110.792106.94875.78371.523115.97673.83071.73862.40043.124
September40.42363.83177.63454.81744.51448.83096.053110.483111.937113.73675.26669.200101.86279.72062.33063.46742.707
October40.41862.83080.02857.55349.38548.20084.905104.820107.297110.83682.40674.27573.65084.77054.26860.36948.560
November42.91364.96966.84462.80345.82844.23877.407101.284105.235115.64483.92876.52453.94092.98254.26156.10842.151
December50.31966.97958.86163.79353.25837.14660.902108.190107.305106.54389.74775.11737.69988.63858.13257.16936.658


  • In January 2013, Reuters, a pricing service, deleted several daily Alaska North Slope (ANS) published estimated spot prices. These prices were for “market holidays.” Reuters ordinarily does not publish ANS spot prices on “market holidays.” This resulted in 2 revisions to the ANS West Coast (WC) Average Spot Price posted on the Department of Revenue website. ANS WC Prevailing Value for January 2012 increased from $111.794 to $111.871 and ANS WC Prevailing Value for September 2012 decreased from $111.971 to $111.937. The Department is posting this change because this revision affects the 2012 production tax return due on March 31, 2013.


  • In July 2013, Dow Jones (Telerate), a pricing service, erroneously posted incorrect daily Alaska North Slope (ANS) published estimated spot prices. These prices were issued July 17-22, 2013. This resulted in July 2013 revision to the ANS West Coast (WC) Average Spot Price posted on the Department of Revenue website. ANS WC Prevailing Value for July 2013 decreased from $111.614 to $111.341. The Department is posting this change because this revision affects the 2013 production tax return due on March 31, 2014.


  • One of the assessing services used to calculate the prevailing value has stopped publishing ANS crude assessments the day after Thanksgiving. As a result, ANS WC PV for November 2016 decreased from $45.882 to $45.828.


  • One of the assessing services used to calculate the prevailing value removed an ANS crude assessment for the day after Thanksgiving from its data set. As a result, ANS WC PV for November 2017 decreased from $62.859 to $62.803.


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