MSC legislation: the rule that catches your company, not your contract
Direct Answer
The Managed Service Company (MSC) legislation (Chapter 9 of ITEPA 2003) targets contractor companies that are provided and run by a third-party "MSC provider" as a packaged product. Where a company is an MSC, all payments to the worker are taxed as employment income under PAYE and NIC — whatever IR35 says. Unlike IR35, which examines your working relationship, the MSC rules examine who controls and profits from your company. A genuine accountant who only gives advice you're free to accept or reject is specifically excluded.
What the MSC rules are for
The legislation was introduced to stop the mass-marketing of personal service companies as an off-the-shelf way to avoid PAYE and NIC — schemes where a provider set up and ran hundreds of near-identical contractor companies and took a cut of the fees. Where a company meets the definition of a Managed Service Company, the "deemed employment payment" rules apply and the worker's income is taxed as employment income.
The critical difference from IR35: the MSC test is about the structure and control of the company, not the day-to-day nature of the work.
MSC vs IR35 at a glance
| IR35 (off-payroll) | MSC legislation | |
|---|---|---|
| What it examines | Your working relationship with the end client | Who provides, controls and profits from your company |
| Assessed | Contract by contract | The company as a whole |
| Trigger | Engagement resembles employment | An "MSC provider" is involved with the company |
| Effect | Deemed payment on the caught contract | All payments to the worker taxed as employment income |
| Debt can transfer to? | Generally the fee-payer / client | Provider, its directors, and potentially the worker |
A company can pass IR35 on every contract and still be caught by the MSC rules — and vice versa. They're separate tests applied independently.
When is an accountant an "MSC provider"?
HMRC's guidance points to a provider being "involved with" the company in ways that go beyond ordinary professional advice. Indicators include a provider that:
- Benefits financially on an ongoing basis from the company (beyond a normal fee for services), or
- Influences or controls the company's finances or its activities, or
- Influences or controls the way payments are made to the worker, or
- Provides the company itself as part of a standardised, packaged arrangement.
The accountancy exclusion. The legislation specifically excludes a person who is merely providing legal or accountancy services in a professional capacity. Genuine advice — which you, as director, are free to act on or ignore — does not make your accountant an MSC provider.
The line is between advice you control and a service that controls your company for you. If you make the decisions and your accountant advises, you're on the right side of it.
Why the debt transfer provision matters
If a company is found to be an MSC and can't pay the resulting PAYE and NIC, HMRC can transfer the debt to other parties — the MSC provider, its directors, and in some circumstances the individual worker. That's what makes an MSC finding far more serious than an ordinary company tax dispute: the liability doesn't die with the company. It's also why the recent enquiries into some large contractor-accountancy firms have caused so much concern among their clients.
This page is general information, not advice on your specific arrangements. If you've received an HMRC letter mentioning the MSC legislation, get professional advice on your own facts before responding — the deadlines are tight.
How to stay clearly outside the rules
- Use an accountant who advises rather than runs your company — you sign off decisions, payments and filings.
- Keep control of your own bank account and money movements; don't hand payment decisions to a third party.
- Avoid packaged "we'll run everything for a % of turnover" arrangements.
- Understand your own numbers — the more engaged you are as director, the clearer it is that no one else is controlling the company.
For the related-but-separate question of your working relationship with clients, see the IR35 questions guide and what a contractor accountant actually does.
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