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 Barrel	2013	2012	2011	2010	2009	2008	2007	2006	2005	2004
January	109.876	111.871	92.557	79.335	39.011	91.159	51.523	62.846	41.125	33.100
February	112.757	119.647	96.786	76.741	42.776	94.422	56.998	59.262	43.589	33.660
March	108.930	122.678	115.341	79.451	47.747	105.063	59.007	60.607	50.632	35.505
April	104.576	120.945	120.860	82.232	46.558	112.370	63.916	67.737	49.749	35.430
May		110.546	113.567	74.231	58.234	125.412	64.755	69.316	46.772	39.066
June		98.063	111.079	75.664	69.797	133.776	69.109	69.500	53.674	36.729
July		103.748	114.469	76.529	64.530	132.871	75.930	73.104	56.671	39.440
August		110.792	106.948	75.783	71.523	115.976	73.830	71.738	62.400	43.124
September		111.937	113.736	75.266	69.200	101.862	79.720	62.330	63.467	42.707
October		107.297	110.836	82.406	74.275	73.650	84.770	54.268	60.369	48.560
November		105.235	115.580	83.928	76.524	53.94	92.982	54.261	56.108	42.151
December		107.305	106.546	89.747	75.117	37.699	88.638	58.132	57.169	36.658

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.