Federal Reserve Seasonal Factors for Motor Vehicle Sales

Release Date: August 1, 2017

The Federal Reserve Board has re-estimated seasonal factors for new motor vehicle sales, using data through April 2017. These factors are estimated once per year using X12-ARIMA. The factors will be revised again in summer 2018.

The Federal Reserve Board provides seasonal factors for cars and light trucks to the Bureau of Economic Analysis (BEA) for use in the National Income and Product Accounts. The BEA has posted on their website seasonal factors for motor vehicle sales from January 1967 (January 1976 for foreign light trucks) through June 2018. These factors are available for download here.

The table below shows the Federal Reserve seasonal factors for monthly motor vehicle sales. For cars and light trucks, these are essentially the same seasonal factors that are available from the BEA extended through December 2019. For completed calendar years, the seasonal factors posted by the BEA may vary slightly from the factors posted here, reflecting small adjustments that align the seasonally adjusted and not seasonally adjusted sales totals. The extended projections of the seasonal factors are prone to larger revisions each year than are the seasonal factor projections for months closer to the end of the data sample. A comma-delimited text file containing the monthly seasonal factors is available for download here.

Monthly Seasonal Factors for Motor Vehicle Sales


Domestic
Autos
Foreign
Autos
Domestic
Light Trucks
Foreign
Light Trucks
Domestic
Medium &
Heavy Trucks
Foreign
Medium &
Heavy Trucks
Jan-2014 80.48 78.15 78.80 84.74 89.13 61.87
Feb-2014 95.68 86.72 91.71 89.97 87.04 69.20
Mar-2014 115.70 112.10 104.75 109.14 104.21 95.31
Apr-2014 104.28 103.45 100.05 95.41 101.62 100.84
May-2014 121.48 115.30 113.55 109.74 100.75 110.76
Jun-2014 102.84 101.01 99.60 95.34 106.53 125.78
Jul-2014 102.04 108.27 105.39 106.38 101.86 111.49
Aug-2014 109.93 112.10 107.90 116.79 97.43 98.83
Sep-2014 90.26 91.67 92.74 90.88 99.67 93.72
Oct-2014 90.56 93.33 97.16 96.08 106.35 98.25
Nov-2014 88.31 94.20 95.19 96.47 88.68 85.75
Dec-2014 99.49 106.13 113.73 112.19 117.31 149.89
Jan-2015 83.78 80.47 82.44 86.26 85.99 57.33
Feb-2015 95.51 86.80 91.67 89.69 87.15 69.96
Mar-2015 112.00 108.66 101.45 106.23 105.86 97.97
Apr-2015 104.77 104.14 102.37 96.15 102.84 103.39
May-2015 116.77 111.34 108.21 105.81 97.95 105.43
Jun-2015 105.61 103.39 101.67 98.60 109.92 128.11
Jul-2015 101.20 107.65 103.97 106.82 101.91 111.49
Aug-2015 105.48 106.99 104.84 109.71 99.14 98.61
Sep-2015 94.69 95.87 97.73 95.71 99.96 95.29
Oct-2015 94.14 96.31 99.37 99.39 102.74 93.77
Nov-2015 84.20 90.26 90.70 91.66 90.84 88.91
Dec-2015 105.33 112.52 119.59 118.31 116.21 154.56
Jan-2016 79.29 76.21 78.46 81.43 82.72 53.86
Feb-2016 95.14 86.75 91.69 89.34 91.49 73.39
Mar-2016 117.78 113.90 109.35 112.41 109.16 105.07
Apr-2016 105.71 105.59 100.48 98.53 99.55 97.10
May-2016 111.42 106.21 104.07 100.33 101.37 106.00
Jun-2016 108.97 106.63 107.19 101.96 111.14 132.67
Jul-2016 101.34 107.41 101.51 106.37 95.88 99.22
Aug-2016 104.84 106.24 104.91 109.77 105.14 107.56
Sep-2016 95.81 97.07 98.23 97.55 99.22 97.84
Oct-2016 89.43 91.04 94.03 92.58 100.38 88.56
Nov-2016 88.69 94.75 95.68 96.73 93.33 92.64
Dec-2016 103.61 110.91 115.94 115.80 112.26 150.84
Jan-2017 78.98 76.07 78.61 81.12 85.18 53.81
Feb-2017 94.60 86.50 91.79 88.91 87.08 70.67
Mar-2017 115.94 112.85 107.75 112.17 108.66 108.53
Apr-2017 103.23 102.91 99.47 95.34 97.18 92.90
May-2017 113.80 108.58 107.12 102.73 105.39 111.31
Jun-2017 108.99 107.06 104.73 103.39 110.11 131.33
Jul-2017 99.97 105.23 100.83 103.13 97.42 95.81
Aug-2017 109.09 110.14 109.99 114.63 104.87 109.34
Sep-2017 97.80 98.80 98.72 98.76 96.73 94.53
Oct-2017 87.14 88.61 91.37 90.62 102.03 90.72
Nov-2017 89.85 95.86 98.18 97.60 93.80 95.19
Dec-2017 100.06 107.49 110.52 111.25 108.09 144.22
Jan-2018 80.17 77.38 81.15 82.67 88.54 56.27
Feb-2018 94.24 86.23 91.90 88.65 87.14 70.23
Mar-2018 119.62 116.22 109.98 115.59 105.55 103.96
Apr-2018 97.38 97.57 94.36 90.40 100.02 96.21
May-2018 118.44 112.71 112.25 107.13 105.13 112.86
Jun-2018 110.88 109.06 104.92 104.88 107.66 125.65
Jul-2018 97.47 102.32 98.06 100.85 99.44 96.64
Aug-2018 108.02 109.70 108.33 115.07 104.69 111.51
Sep-2018 96.44 96.69 98.11 95.32 94.19 90.92
Oct-2018 89.08 90.59 94.30 92.76 105.52 95.52
Nov-2018 89.63 96.19 96.06 98.70 92.72 94.55
Dec-2018 100.35 107.39 112.91 110.12 108.98 142.80
Jan-2019 81.59 78.53 82.70 84.24 88.21 56.80
Feb-2019 94.10 86.10 92.01 88.55 87.32 69.66
Mar-2019 114.92 112.15 104.64 110.74 102.40 99.82
Apr-2019 99.97 99.92 96.48 93.26 102.96 99.05
May-2019 117.35 112.36 110.58 107.62 105.06 115.07
Jun-2019 108.86 106.66 103.95 101.46 105.06 120.26
Jul-2019 99.49 104.37 101.12 103.19 103.07 101.77
Aug-2019 114.87 115.83 113.07 122.41 101.48 105.51
Sep-2019 89.15 89.71 91.25 87.53 96.96 93.46
Oct-2019 92.55 93.97 99.12 96.46 104.74 97.24
Nov-2019 91.15 98.04 96.32 99.99 90.55 90.31
Dec-2019 98.72 105.65 112.53 108.82 111.14 146.73

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Last Update: August 1, 2017