This page last reviewed July 29, 2019

AB 32 COI Common Carbon Cost and Transportation Fuel Fee Rates

Common Carbon Cost Values

Greenhouse gas emissions reporting began in 2008 and the first COI Fee invoices were sent in for Fiscal Year 2010-11. The State of California fiscal year begins on July 1 and ends on June 30 of the following calendar year.

Fiscal Year Emissions Year Units Common Carbon Cost
2010-11 2008 $ / MT CO2 0.171
2011-12 2009 $ / MT CO2 0.170
2012-13 2010 $ / MT CO2 0.180
2013-14 2011 $ / MT CO2 0.145
2014-15 2012 $ / MT CO2 0.12133986
2015-16 2013 $ / MT CO2 0.15118302
2016-17 2014 $ / MT CO2e 0.14829626
2017-18 2015 $ / MT CO2e 0.19815043
2018-19 2016 $ / MT CO2e 0.25218845
2019-20 2017 $ / MT CO2e 0.25898034

Note: Before 2014, only CO2 emissions were subject to the fee. Starting with emission year 2014, the Regulation includes other greenhouse gases: methane (CH4) and nitrous oxide (N2O). The total emissions are then expressed in metric tons of CO2 equivalent (CO2e).


Fuel Fee Rates (CCC x Fuel Emission Factor)

Transportation fuel fee rates provide the per gallon cost associated with implementation of the AB 32 COI Fee Regulation. Transportation fuel fee rates are calculated by multiplying the CCC by the transportation fuel emission factors (below).

Fiscal Year Fuel Type Fuel Fee Rate ($/gallon)
2010-11 CA Diesel 0.00170316
CA Gasoline 0.00146205
2011-12 CA Diesel 0.0016932
CA Gasoline 0.0014535
2012-13 CA Diesel 0.0017928
CA Gasoline 0.001539
2013-14 CA Diesel 0.0014442
CA Gasoline 0.00123985
2014-15 CA Diesel 0.00120855
CA Gasoline/CARBOB 0.00103746
2015-16 CA Diesel 0.001505783
CA Gasoline/CARBOB 0.001292615
2016-17 CA Diesel 0.001518102
CA Gasoline/CARBOB 0.00127836
2017-18 CA Diesel 0.002028457
CA Gasoline/CARBOB 0.001708117
2018-19 CA Diesel 0.002581641
CA Gasoline/CARBOB 0.002173941
2019-20 CA Diesel 0.002651169
CA Gasoline/CARBOB 0.002232489

Transportation Fuel Emission Factors

Transportation fuels such as CA Diesel, CA Gasoline, and CARBOB that are produced in California or imported into California are subject to the Fee Regulation.

Fuel Type Emission Factor
CA Diesel 0.010236952 (MTCO2e/gallon) or 0.429952 (MTCO2e/bbl)
CA Gasoline/CARBOB 0.008620302 (MTCO2e/gallon) or 0.3620527 (MTCO2e/bbl)



For questions, please contact:
Ryan Schauland at Ryan.Schauland@arb.ca.gov

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