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<p>The Impact Assessment compared the costs and benefits of meeting net zero in 2050
for different options for the level of the Sixth Carbon Budget, including the level
recommended by the Climate Change Committee which has since been voted into law. Costs
and benefits were aggregated over 2020-2050 to reflect uncertainty around the precise
annual profile. Given this uncertainty, the table below sets out the undiscounted
costs and benefits over 5 yearly increments.</p><p> </p><p>Table 1. Costs and benefits
breakdown by sixth carbon budget options, Core pathway only</p><table><tbody><tr><td><p>
</p></td><td><p><strong>Costs and benefits relative to Option 1</strong> <strong>(Do
Nothing baseline of 2100MtCO2e)</strong><br> <strong>(£bn, undiscounted)</strong></p></td><td><p><strong>2021-2025</strong></p></td><td><p><strong>2026-2030</strong></p></td><td><p><strong>2031-2035</strong></p></td><td><p><strong>2036-2040</strong></p></td><td><p><strong>2041-2045</strong></p></td><td><p><strong>2046-2050</strong></p></td></tr><tr><td
rowspan="3"><p><strong>Costs </strong> <strong>(incl. capital & finance)</strong></p></td><td><p>Option
2, Looser, 1105Mt</p></td><td><p>34</p></td><td><p>88</p></td><td><p>160</p></td><td><p>217</p></td><td><p>277</p></td><td><p>381</p></td></tr><tr><td><p>Option
3, CCC level, 965Mt</p></td><td><p>37</p></td><td><p>91</p></td><td><p>186</p></td><td><p>256</p></td><td><p>309</p></td><td><p>395</p></td></tr><tr><td><p>Option
4, Tighter, 865Mt</p></td><td><p>38</p></td><td><p>94</p></td><td><p>206</p></td><td><p>301</p></td><td><p>328</p></td><td><p>389</p></td></tr><tr><td
rowspan="3"><p><strong>Benefits</strong> <strong>(incl. fuel & emissions savings)</strong></p></td><td><p>Option
2, Looser, 1105Mt</p></td><td><p>2</p></td><td><p>68</p></td><td><p>182</p></td><td><p>357</p></td><td><p>526</p></td><td><p>739</p></td></tr><tr><td><p>Option
3, CCC level, 965Mt</p></td><td><p>4</p></td><td><p>71</p></td><td><p>168</p></td><td><p>401</p></td><td><p>554</p></td><td><p>757</p></td></tr><tr><td><p>Option
4, Tighter, 865Mt</p></td><td><p>12</p></td><td><p>98</p></td><td><p>174</p></td><td><p>387</p></td><td><p>540</p></td><td><p>762</p></td></tr></tbody></table>
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