The Economic Crime and Corporate Transparency Act 2023 (ECCTA) has two principal impacts on corporate criminal liability for tax offences.
1. Attribution of offences committed by senior managers

If a senior manager of a company or partnership (acting within the actual or apparent scope of their authority) commits an economic crime, the entity is also guilty of an offence. The specified economic crimes include the tax offences of cheating the public revenue and fraudulent evasion of VAT, meaning that the commission of these tax offences by a senior manager could result in criminal liability for the company or partnership. A "senior manager” is an individual who plays a significant role in the making of decisions about how the activities of the entity are to be managed or organised, or the actual managing or organising of those activities. Previously, attributing criminal liability to a company typically required prosecutors to show that more senior members of a company (such as board directors) were involved in and aware of the illegal activity. Following ECCTA, the activities of a relatively lower level manager could result in corporate criminal liability.
2. New corporate criminal offence of failure to prevent fraud
A large organisation may be guilty of an offence if it fails to prevent an associate (those performing services for or on behalf of them) from committing a fraud offence. The associate (which could include a subsidiary, or an employee, depending on the circumstances) must intend that the fraud offence benefits either the entity or a person to whom the associate provides services on behalf of the entity. A "large organisation" is a company or partnership that satisfies two out of three of the following conditions in a financial year: (a) its turnover exceeds £36 million; (b) its balance sheet exceeds £18 million; and (c) it has more than 250 employees.
The fraud offences include cheating the public revenue which is also within the scope of the UK FTP offence. However, the two offences will bite in slightly different scenarios. This is because the FTP offence requires that the activities of the associate facilitate the cheating the public revenue by a separate taxpayer, whereas the failure to prevent fraud offence would apply where the associate itself cheats the public revenue for the benefit of the principal.
Like the FTP offences, failure to prevent fraud is strict liability, but a defence will be available if the entity can demonstrate that either (a) they had in place "reasonable prevention procedures" or (b) it was reasonable to have no such prevention procedures in place.