Is there a link between IR35 and the MSC legislation?

The Managed Service Company (MSC) legislation and IR35 both deal with tax risk where an individual provides services through an intermediary.

They sit in different chapters of ITEPA 2003, use different tests and do not apply in the same way.

There are, however, situations where more than one regime could theoretically apply to the same engagement.

HMRC has set out a clear order of priority for these rules.

This guide explains what the MSC legislation covers, how it differs from IR35, how HMRC decides which rules apply, and what contractors, clients and advisers should be aware of.

For a guide to the core status rules, see our main overview: IR35 basics.

1. What the MSC legislation covers

The MSC rules are contained in Chapter 9, Part 2 of ITEPA 2003.

They were introduced in 2007 to tackle arrangements where workers provided services through companies promoted or facilitated by an MSC Provider, and that provider was involved with the company in one or more of the ways defined by the legislation.

HMRC guidance describes the effect of the legislation in simple terms. Where a company meets the definition of a Managed Service Company, payments and benefits received by the worker for services provided through that company, directly or indirectly and whatever their form, are treated as employment income and are subject to PAYE and National Insurance contributions.

The rules apply regardless of the label applied to the income, such as salary, dividend, or otherwise.

See HMRC’s manual here: ESM3605: MSC legislation and IR35 and related MSC guidance.

Key points from the MSC rules:

They apply where the worker provides services through a company that meets the statutory definition of a Managed Service Company.
There must be an MSC Provider that is in the business of promoting or facilitating the use of companies to provide the services of individuals, and that is involved with the company in one or more of the ways defined by the legislation.
Payments and benefits received by the worker for the services, directly or indirectly and whatever their form, are treated as employment income.
If PAYE and NIC liabilities cannot be recovered from the MSC, statutory debt transfer provisions can potentially transfer the debt to directors of the company, the MSC Provider and certain other parties specified by the legislation.

For a contractor, the practical effect can be more far-reaching than IR35. MSC exposure can potentially affect payments across the company’s MSC arrangements rather than being confined to a single disputed engagement.

External technical background: Qdos MSC legislation overview.

2. What IR35 covers

The IR35 rules are contained in Chapter 8 and Chapter 10 of ITEPA 2003.

Chapter 8 applies where an individual provides services through an intermediary (often a personal service company) and, ignoring the intermediary, the engagement would be an employment for tax purposes.
Chapter 10 (the Off Payroll rules) applies to public authorities and to medium and large clients in the private and voluntary sectors. Responsibility for assessing status can move from the contractor company to the client. See our overview: Off Payroll rules explained.

IR35 focuses on employment status tests that are now familiar to most contractors and advisers:

If IR35 applies, the income linked to that engagement is treated as if it were employment income.

Under Chapter 8 the calculation is made at company level by the intermediary. Under Chapter 10, the fee-payer or deemed employer normally operates PAYE where the client has fulfilled its statutory obligations.

3. Is there a link between MSC rules and IR35?

There is no single piece of law that combines the MSC rules and IR35. They are separate regimes aimed at different problems.

However, both deal with situations where someone provides services through an intermediary company and both can, at least on paper, be relevant to the same contractor.

HMRC’s Employment Status Manual contains a short section titled “MSC legislation and IR35”. It explains what happens when both the MSC and IR35 conditions are potentially in point.

The manual makes two key statements:

If a service company would be caught by Chapter 8 IR35 and also meets the definition of an MSC, then Chapter 8 does not apply. The MSC legislation must be applied instead.
If both the MSC legislation and Chapter 10 (Off Payroll) could apply to an engagement, then Chapter 10 takes precedence and the MSC rules do not apply.

In other words, there is a hierarchy. Where more than one regime could apply, the legislation sets out which one HMRC must use.

Qdos summarises the position in similar terms for contractors and advisers, noting that if the MSC legislation applies then Chapter 8 does not need to be considered, while Chapter 10 takes priority where it applies.

See their overview: Qdos MSC legislation guide.

4. The order of priority in practice

Bringing this together, the order looks like this for most contractor arrangements:

Consider whether the engagement falls under the Off Payroll rules in Chapter 10. If it does, Chapter 10 is applied and the MSC rules are not used.
If Chapter 10 does not apply, consider whether the company is an MSC. If it meets the definition, the MSC legislation is applied and Chapter 8 is not used.
If neither Chapter 10 nor the MSC rules apply, Chapter 8 IR35 may apply and should be considered using the usual status tests.

This is not a menu or a matter of preference. HMRC is expected to follow the statutory order where more than one regime could apply. The manual text on this point is brief but unambiguous.

5. Key differences between MSC and IR35

Contractors sometimes focus entirely on IR35 and overlook MSC risk, or assume the two rules operate in a broadly similar way. There are significant differences.

Area	MSC legislation	IR35 (Chapter 8 and 10)
Primary target	Companies promoted or facilitated by an MSC Provider, where the provider is involved with the company in one or more of the ways defined by the legislation.	Any intermediary (often a personal service company) where, ignoring the intermediary, the engagement would be employment.
Main test	Is there an MSC Provider, does the company meet the statutory definition of an MSC, and is the provider involved with the company in one or more of the statutory ways?	Personal service, control, mutuality of obligation and the other factors relevant to the overall employment status assessment, including integration, financial risk and business on own account.
Scope of income affected	Payments and benefits received by the worker for services through the MSC, directly or indirectly and whatever their form, are treated as employment income for tax and NIC purposes.	Income relating to specific engagements that fall inside IR35 is treated as employment income.
Who operates PAYE	The MSC is required to account for PAYE and NICs. Debt transfer provisions can potentially move the liability to directors, the MSC Provider and certain other parties specified by the legislation.	Under Chapter 8, the intermediary company performs the deemed payment calculation. Under Chapter 10, the fee-payer or deemed employer normally operates PAYE where the client has fulfilled its statutory obligations.
Typical scenarios	Arrangements where companies are promoted or facilitated by an MSC Provider and the provider goes beyond ordinary professional services by becoming involved with the companies in one or more of the statutory ways.	Single contractor companies working for one or more clients on contracts where employment status is in doubt.

6. How issues arise in real engagements

For contractors operating a personal service company with genuine control over their own business, IR35 may be the more obvious status risk, but the involvement of an accountant or other service provider should still be considered separately under the MSC rules.

Providing genuine professional accountancy, payroll or administrative services does not by itself mean that a firm is an MSC Provider or that its client companies are MSCs. The nature of the provider’s business and its actual involvement with the company must be considered against the statutory tests.

MSC risk is more likely where:

a third party promotes or facilitates the use of companies by multiple workers
the provider goes beyond ordinary professional services and becomes involved in the company’s finances, payments or other matters covered by the statutory tests
workers have limited involvement in important commercial or financial decisions concerning their companies
the arrangements for receiving income, deducting fees and paying workers indicate a level of provider involvement that may fall within the statutory definition.

Activities such as preparing invoices, operating payroll and completing tax returns do not, by themselves, establish that a provider is involved with a company for MSC purposes. Ordinary professional services need to be distinguished from the forms of involvement specified by the legislation.

Specialist firms have reported increased HMRC activity in recent years, with some providers and their contractor clients facing MSC enquiries. This sits alongside, rather than instead of, HMRC’s more familiar IR35 work.

IR35 risk, by contrast, is usually driven by status factors such as how much control the client exerts, whether there is an obligation for personal service, and whether the contractor is integrated into the client organisation. Those issues are explored in more detail in our status test guides:

7. What contractors, clients and advisers should check

In practical terms, the questions to ask are straightforward, even if the legislation is not.

For contractors

Who set up your company and on what terms. Was it a standard package offered to many workers, or a bespoke arrangement.
Who decides how your company is run. Do you make commercial decisions, or does a provider become involved in matters covered by the MSC legislation.
How money moves through the chain. Does the client or agency pay your company directly, or does a provider receive the money, deduct fees and then pay you. The payment arrangement is not decisive by itself but may be relevant when considering the provider’s overall involvement.
Whether your accountant or service provider markets itself in a way that might fit the definition of an MSC Provider. If in doubt, ask them to explain their position on the MSC rules.
For each engagement, whether your contract and working practices would stand up to an IR35 review.

For clients and agencies

Whether you are within scope of the Off Payroll rules and have applied Chapter 10 correctly.
Whether any third party in your supply chain might be acting as an MSC Provider. Employment businesses carrying on their ordinary business of placing workers are specifically excluded from being MSC Providers in that capacity, although different activities may need to be considered separately.
How you document status decisions and Status Determination Statements, and whether you have processes in place to identify higher risk models.
Whether advice has been taken on the interaction between IR35, the MSC rules and any relevant agency legislation for your particular supply chain.

8. Dealing with HMRC enquiries in this area

HMRC enquiries into MSC and IR35 will normally involve requests for information and documents. The focus and timescales can differ, but some basics are the same.

Keep contracts, engagement letters and correspondence with providers and clients.
Maintain clear records of who invoices whom, how payments are made and what fees are deducted where. This is important for both MSC and IR35 cases.
Document working practices as they are in reality, alongside the written contractual terms.
If you receive an MSC or IR35 enquiry, take specialist advice early rather than replying on your own.

Our separate guide explains the IR35 investigation process in more detail.

For formal guidance on appeals and dispute resolution, see HMRC’s general appeals page: https://www.gov.uk/tax-appeals.