The hidden tax measure in the Budget is huge for people paying tax under self-assessment - sole traders, partners, landlords, retired investors.
For 6th April 2028-29, you currently pay 50% of your income tax late in the tax year in question (in January 2029), 50% just after the year end (in July 2029) with any make-up payment in January 2030.
Under the new proposals you will pay your tax perhaps monthly or quarterly (TBC) from April 2029 onwards. A rough analysis suggests the impact is to draw about 50% of your tax bill forward, a huge cashflow boost to HMRC and a significant funding issue for the self-employed.
The Treasury recognises this, and expects to raise £1.3bn of additional tax in 29/30 as a result of this change.
The cashflow impact of the accelerated charge will send some businesses to the wall.