Certainly. I hope the hon. Lady will agree that we all want to see more decarbonisation, which is precisely why we have set the net zero landmark
achievement for 2050, as she knows. In relation to energy security, we have to be realistic about where we are. Much as some campaigners would like it, we cannot stop using oil tomorrow. We have to find reasonable and methodical ways of decarbonising, which is precisely what the investment allowances aim to do, while encouraging different businesses, and indeed those businesses, to invest in carbon-free and low-carbon forms of energy production.
Clause 3 will extend the levy so that it ends on 31 March 2028 rather than in 2025. Although the levy remains a temporary measure, the change simply reflects the fact that global factors are now expected to keep commodity prices, particularly gas prices, elevated for longer than was first anticipated. At the same time, the Government recognise that certainty is key for oil and gas investments. There will therefore no longer be an early phase-out of the levy ahead of the new March 2028 end date, according to prices.
Together, the changes introduced in clauses 1 to 3 will raise approximately £20 billion over the next six years. The total revenue now expected from the levy is just over £40 billion over the same period.
Clause 4 relates to rates of research and development tax credits. The changes it makes will ensure that taxpayers’ money is spent as effectively as possible. Despite the UK spending the most in the OECD on R&D tax reliefs, the current system does not provide good enough value for taxpayers. The cash value of the scheme that looks after small and medium-sized enterprises is currently three times that of the research and development expenditure credit. The corporation rate change due from April next year will make the issue worse by incentivising less R&D per £1 of taxpayer support. Sadly, the SME scheme’s generosity has also made it a target for fraud.
The clause will therefore rebalance the generosity between RDEC and the SME scheme, specifically by increasing the RDEC rate from 13% to 20%, decreasing the SME enhanced deduction from 130% to 86%, and decreasing the SME credit rate from 14.5% to 10%. The changes that the clause will introduce are also a step towards a possible simplified single RDEC-like scheme for all.
Despite raising revenue, this reform is forecast to leave the level of R&D investment in the economy unchanged. More broadly, the Government have recommitted to increasing R&D spending to £20 billion by 2024-25. Ahead of the spring Budget, we will work with industry to understand whether further support is necessary for R&D-intensive SMEs. I know that is the point that most concerns several colleagues; I suspect that we will hear more about it in due course.
Clauses 5 and 6 relate to income tax thresholds. As the autumn statement sets out, the path to fiscal sustainability requires us to ask everyone to contribute a little more towards our public finances, but we are doing so in a fair way: those with more are being asked to contribute more.
Clause 5 will set the personal allowance at £12,570 and the basic rate limit at £37,700 for 2026-27 and 2027-28. Those thresholds, which have already been fixed at the current levels until April 2026, will be maintained for a further two years until April 2028. I hope hon. Members will note that the personal allowance
is still the most generous tax-free personal allowance of any G7 country. Thanks to previous significant real-terms increases, it will still be more than £2,000 higher by April 2028 than if it had been uprated by inflation since 2010, with an estimated 1.6 million more people taken out of paying tax. Approximately 30% of people do not pay tax as a result of the personal allowance. I hope Government Members are proud that we have achieved that.
This Government also enacted the largest ever increase to a personal tax starting threshold in July this year by raising the national insurance starting threshold to £12,570, ensuring that some of the lowest earners do not pay any tax. That means that in 2028 someone on the average salary of £28,000 will still pay almost £900 less in tax than if tax thresholds had gone up with inflation since 2010. The income tax higher rate threshold is still high enough to protect the vast majority of people from paying the higher rate of income tax; approximately 80% of taxpayers pay tax at the basic rate.
Clause 6 will deal with those at the higher end of the income scale, to ensure that our return to sustainable public finances happens in a fair way. It will lower the additional rate threshold from £150,000 to £125,140 from April next year, meaning that income above that level will be taxed at 45%. Only the top 2% of taxpayers will be affected by this measure, which is expected to raise £800 million per year by 2024-25, with the vast majority of revenue—more than 80%—coming from those who earn more than £150,000.