How Managed Service Providers (MSPs) are hit by HMRC’s Joint & Several Liability

The introduction of HMRC’s Joint and Several Liability (JSL) rules for umbrella companies on April 6th 2026 — resulting in the shift of PAYE tax and NIC liability — has generated a lot of discussion.

Which temporary labour supply chain party sits at the centre of the JSL tax shift?

Much of the talk about the new JSL rules has been on their impact on contractor umbrella companies and, in second place, contractor recruitment agencies.

However, there is a third, significant entity that sits at the centre of this shift — the Managed Service Provider (MSP), writes strategic leadership expert Ashley Oliver, a director at Parasol, who has 18 years’ professional experience in the contingent workforce sector.

Key takeaways

• Often confused with big agencies, MSPs are the answer for employers who don’t want hassle/complexity when scaling contingent labour.
• In the contractor market, HMRC’s JSL rules have removed the arm’s length relationship that Managed Service Providers long-had with umbrellas.
• Under Joint & Several Liability (JSL), an MSP is liable to HMRC for a sub-tier umbrella’s tax failing/shortfall, purely by virtue of the MSP’s ‘oversight’ role.
• Upgrading their VMS (Vendor Management System) technology is often at the heart of MSPs’ new efforts to improve engagement with umbrella companies.
• Aware of the risks of becoming the primary guarantor of their supply chains’ tax debts, MSPs will move away from supplier agreements and towards PSLs.

Who are Managed Service Providers (MSPs) often confused with?

Often confused with umbrella companies and large recruitment agencies, Managed Service Providers (MSPs) may now even hold the keys to the temporary labour supply chain in the JSL age.

Why?

Well, I’ll get to that, and other MSP details, developments and even a prediction, here and exclusively for ContractorUK.

Why do Managed Service Providers exist?

For years, the contractor recruitment landscape was a relatively straight line: client needed a worker; agency found the worker; umbrella paid the worker.

But as large organisations scaled their contingent workforces, the complexity became unmanageable.

Enter the MSP.

In the contractor labour market, what is a Managed Service Provider (MSP)?

Unlike a standard recruitment agency that focuses on sourcing candidates for vacancies, an MSP is an outsourced corporate function that manages the entire end-to-end temporary labour process for a client.

An MSP coordinates both demand and supply, controlling the process and technology — usually via Vendor Management System (VMS). And, crucially, the MSP ensures compliance across the entire ‘second tier’ of agencies beneath them.

What role do MSPs play in 2026/27?

Managed Service Providers operate in 2026/27 because corporations that engage high volumes of contingent workers don’t want the hassle of having to deal with 20 different recruitment agencies, varying margins, and inconsistent compliance checks!

The MSP acts as the end-user organisation’s single point of contact, providing them, as the ultimate employer, with cost savings through volume and efficiency.

Is it important to distinguish MSPs from other supply chain parties?

Distinguishing MSPs from other entities in the chain is vital.

We can do this by drawing up definitions of the key parties in a temporary labour supply chain.

• A recruitment agency is a supplier that sources talent.
• An umbrella company is the employer, providing the payroll and employment framework for the worker.
• The MSP was the architect and the facilitator, sitting between the end-client and the agencies and umbrella companies.

How do HMRC’s JSL rules change Managed Service Providers’ role?

Before HMRC’s JSL rules, the distance between the MSP and umbrella company was tangible, and in most cases, they were at arm’s length from each other.

However, JSL has fundamentally changed the landscape and introduced a direct link between MSPs and the umbrella companies within their supply chains.

What role do MSPs play in the Joint & Several Liability era?

The arrival of JSL on April 6th 2026 shifted MSPs from the roles of coordinator and facilitator to that of regulator and supply-chain compliance stakeholder.

After all, under the new Joint & Several Liability legislation, if an umbrella company defaults on PAYE or NICs, HMRC will look upstream to recover the debt.

How are MSPs liable to HMRC under JSL?

For a Managed Service Provider, HMRC liability under the new JSL rules hinges on their contractual and operational position.

If the MSP sits in the contractual flow of funds, acting as the fee-payer that receives money from the client and distributes it to agencies (as is the common arrangement), then such an MSP sits squarely in the middle of JSL’s crosshairs.

Now that JSL is in force, if an MSP facilitates a supply chain involving non-compliance or tax avoidance schemes, the ‘strict liability’ nature of JSL means HMRC does not need to prove intent — only a tax shortfall.

The MSP will be held liable for the failings of a sub-tier umbrella company, purely by virtue of its oversight role in the chain.

And this liability shift has prompted MSPs to make a significant effort to understand and engage with umbrella companies at an unprecedented level.

What do umbrella companies want from an MSP?

From the perspective of a compliant umbrella company, the biggest challenge MSPs face right now is the need for clear, transparent visibility across their entire supply chain.

From our JSL conversations with many MSPs, these providers are currently addressing the need to upgrade their vendor management systems, technology, and processes to encompass the entire supply chain, including umbrella payroll providers.

Unlike our Parasol 360/Worksome platform, which provides complete end-to-end supply chain data and visibility, most typical VMS technology does not go so far as to capture how the worker is paid and by whom.

It goes without saying, therefore, that we (as a compliant umbrella provider) are keen to demonstrate absolute transparency and compliance to maximise our chances of establishing ourselves as preferred suppliers to MSPs.

So, with JSL now enforceable by HMRC, perhaps it’s more of a case of ‘What do MSPs need from umbrellas?’ rather than ‘What do umbrella companies want from an MSP?’

What has the Joint and Several Liability rule achieved?

The introduction of Joint & Several Liability for the UK umbrella company market has gone a long way toward eradicating ignorance and the ‘not my problem’ attitude toward contractor payroll. It has forced the temporary labour supply chain to come together to address non-compliance.

In an ideal world, all that compliant umbrella companies want from MSPs in 2026/27 is to have a level playing field, based on standards of service and compliance.

We predict that MSPs will shortly move away from supplier agreements based on commercial terms, towards Preferred Supplier Lists (PSLs) based on rigorous, real-time data sharing, transparency, and compliance.

The takeaway

For contractors’ recruitment agencies, the challenge will focus on managing umbrella suppliers across a multitude of MSP PSLs, and balancing this with retaining workers/contractors who might be asked to change umbrella provider.

For MSPs, total end-to-end visibility of the entire supply chain is now a non-negotiable, and their choice has been made binary thanks to the JSL legislation — become a rigorous gatekeeper of compliance, or face becoming the primary guarantor for the entire supply chain’s tax debt.