The Home Office is taking an increasingly hard line with sponsor compliance for employing migrant workers, while continuing to amend the Immigration Rules and policy at pace. Firms that hold sponsor licences should be aware of substantial changes to both the rules and sponsor guidance, as well as a clear shift in enforcement approach.
Enforcement against sponsors
Enforcement action has intensified. The Home Office revoked 3,100 Worker sponsor licences in 2025, more than double the number in the previous year. Licence suspensions have similarly doubled year on year (from 1,693 in 2024 to 3,416 in 2025). While enforcement activity has long been a feature of the sponsorship system, the current approach is notably more interventionist and significantly less forgiving.
As of March 2026, the Home Office has clarified the burden of proof in its favour, enabling it to take enforcement action where it has merely a ‘reasonable suspicion’ of non-compliance. Previously, enforcement action would typically follow a more clearly evidenced breach. This materially reduces the margin for error and increases the risk of suspension, pending further investigation. During a licence suspension, sponsors cannot rely on their licence to sponsor new workers. Even if a suspension is subsequently lifted, businesses may lose valuable time and face disruptions in recruitment while negotiating with the Home Office.
For those sponsors whose licences are revoked, the scope for mitigation is extremely limited. In Prestwick Care Ltd v Secretary of State for the Home Department, it was confirmed that where serious breaches are identified, the Home Office is not required to consider the wider consequences of revocation, including the impact on affected workers or the business. The message is clear that sponsors cannot rely on proportionality arguments to shield them from the consequences of breaching their duties.
Changes to the legal framework
Increasing scrutiny is being applied to the consistency between job descriptions, occupation codes, salary levels and the genuine business need for the role. Taken together, these measures reflect the Home Office’s determination to identify and remove sponsors who are abusing the sponsorship system.
The rules concerning the way in which salaries must be paid to sponsored workers are becoming increasingly complex, illustrating the Home Office’s focus on ensuring workers are paid the correct amounts, which are subject to prescribed thresholds and going rates. These must now be satisfied within each pay period, rather than assessed solely on an annual basis. This provides for more frequent monitoring on salary compliance using HMRC data, thereby facilitating earlier detection of non-compliance and resulting in swifter enforcement action.
Increasing complexity of sponsor guidance
The compliance obligations placed on HR teams have become increasingly onerous. Sponsors are required to comply with a wide range of reporting and record-keeping duties, all set out within the extensive sponsor guidance.
The guidance is used to implement sponsorship duties without the need for legislation, and in many cases the changes are unclear and apply immediately following publication. By way of example, the guidance was updated in March to extend the requirement to undertake right-to-work checks to anyone a sponsor ‘engages’. Previously, this requirement was restricted to only those who were sponsored and/or employed. In the absence of a clear definition of what is meant by ‘engage’, sponsors were left contemplating the administrative burden of having to check the right to work of anyone who provided a service to them via third-party contractors. Surely this is unreasonable.
Last month, the guidance was updated to clarify that sponsors must complete the checks on sponsored workers, employees and those ‘directly engaged’. This appears to be a soft policy launch setting sponsors up as the guinea pigs for the impending legislation of section 48 of the Border, Security, Asylum and Immigration Act 2025. This draft legislation comes in response to the modern labour models increasingly used by business and extends penalties under the prevention of illegal working regime to non-employees.
Over the past year alone, the sponsor guidance has been updated on four separate occasions, with the most recent version extending to 378 pages and being about 40% longer than its 2021 equivalent. In addition, sponsors are required to navigate multiple interrelated documents, all of which must be cross-referenced, further increasing the complexity of the regime.
Sponsors are expressly required to read, understand and comply with all relevant parts of the sponsor guidance, including the core guidance, appendices, glossary and route-specific provisions, as well as to remain alert to future amendments. Failure to do so will not excuse non-compliance and ignorance of the requirements will provide no defence in the event of enforcement action.
Overall, sponsor compliance is becoming more complex. Sponsors must adopt a proactive and systematic compliance strategy, encompassing regular internal audits, robust HR processes and continuous monitoring of developments. Careful attention to detail is not simply advisable but essential to maintaining the ability to sponsor overseas talent.
Natasha Chell is senior partner and head of UK practice, Laura Devine Immigration
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