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C02 emissions: appropriate percentages

The exact CO2 figure is always rounded down to the nearest 5 grams per kilometre (g/km).

For example, the car’s log book gives CO2 emissions of 102g/km. Rounding down this comes to 100g/km which is an appropriate percentage of 19% for 2017/18.

The percentages must be adjusted for diesel and low emission cars (see below).

C02
emissions

(g/km)

 

2010/11

2011/12

2012/13

2013/14

2014/15

2015/16

2016/17

2017/18

2018/19

2019/20

C02
emissions (g/km)

0

0%

0%

0%

0%

0%

-

-

-

-

0

0 - 50

5%

5%

5%

5%

5%

5%

7%

9%

13%

16%

0 - 50

51 -75

5%

5%

5%

5%

5%

9%

11%

13%

16%

19%

51 -75

76 - 94

10%

10%

10%

10%

11%

13%

 15%

17%

19%

22%

76 - 94

95 - 99

10%

10%

10%

11%

12%

14%

 16%

18%

20%

23%

95 - 99

100-104

10%

10%

11%

12%

13%

15%

 17%

19%

21%

24%

100 - 104

105-109

10%

10%

12%

13%

14%

16%

 18%

20%

22%

25%

105-109

110-114

10%

10%

13%

14%

15%

17%

 19%

21%

23%

26%

110-114

115-119

10%

10%

14%

15%

16%

18%

 20%

22%

24%

27%

115-119

120

10%

10%

15%

16%

17%

19%

 21%

23%

25%

28%

120

125

15%

15%

16%

17%

18%

 20%

22%

24%

26%

29%

125

130

15%

16%

17%

18%

19%

21%

 23%

25%

27%

30%

130

135

16%

17%

18%

19%

 20%

22%

 24%

26%

28%

31%

135

140

17%

18%

19%

  20%

21%

23%

 25%

27%

29%

32%

140

145

18%

19%

20%

21%

22%

24%

 26%

28%

30%

33%

145

150

19%

20%

21%

22%

23%

25%

 27%

29%

31%

34%

150

155

20%

21%

22%

23%

24%

26%

 28%

30%

32%

35%

155

160

21%

22%

23%

24%

25%

27%

29%

31%

33%

36%

160

165

22%

23%

24%

25%

26%

28%

 30%

32%

34%

37%

165

170

23%

24%

25%

26%

27%

29%

 31%

33%

35%

37%

170

175

24%

25%

26%

27%

28%

30%

 32%

34%

36%

37%

175

180

25%

26%

27%

28%

29%

31%

 33%

35%

37%

37%

180

185

26%

27%

28%

29%

30%

32%

 34%

36%

37%

37%

185

190

27%

28%

29%

30%

31%

33%

35%

37%

37%

37%

190

195

28%

29%

30%

31%

32%

34%

36%

37%

37%

37%

195

200

29%

30%

31%

32%

33%

35%

37%

37%

37%

37%

200

205

30%

31%

32%

33%

34%

36%

 37%

37%

37%

37%

205

210

31%

32%

33%

34%

35%

37%

 37%

37%

37%

37%

210

215

32%

33%

34%

35%

35%

37%

 37%

37%

37%

37%

215

220

33%

34%

35%

35%

35%

37%

 37%

37%

37%

37%

220

225

34%

35%

35%

35%

35%

37%

 37%

37%

37%

37%

225

230

35%

35%

35%

35%

35%

37%

 37%

37%

37%

37%

230

235

35%

35%

35%

35%

35%

37%

 37%

37%

37%

37%

235

240+

35%

35%

35%

35%

35%

37%

 37%

37%

37%

37%

240

 

Diesel cars

From 6 April 2018:

To 5 April 2018:

Discounts for low emission cars

Type of power/fuel

Discount

Cars producing zero emissions

0% from 2010/11 to 2015/16

E85 (petrol and up to 85% ethanol mix)

2% to 5 April 2011

Road fuel gas cars: LPG or (first registered on or after 1 January 1998) *

2% to 5 April 2011

Hybrids (petrol and electric) first registered on or after 1 January 1998)

3% to 5 April 2011

BI-fuel (first registered on or after 1 January 2000)

2% discount to 5 April 2011

 

Bi-fuel first registered in 1998 or 1990

N/A