Working Out IR35 Status Across Multiple Short Contracts

Why one year can mean several different IR35 answers

If you work through your own limited company and pick up a string of short contracts across a tax year, it's tempting to think of your status as one big annual question: "am I outside IR35 this year or not?" That isn't how the rules work.

HMRC's guidance is clear that the off-payroll working rules are applied on a contract-by-contract basis. A worker can have some engagements that fall within the rules and others that fall outside them, within the very same tax year (Understanding off-payroll working (IR35); Off-payroll working for intermediaries and contractors providing services to small clients in the private sector). This is the core principle behind IR35 status several assignments questions, and it matters a great deal if you're juggling a contractor year multiple clients setup.

Each engagement is assessed on its own facts

HMRC guidance states that every engagement a worker enters into has to be considered separately for the off-payroll working rules. That means multiple short contracts in a year are never treated as a single, blended IR35 decision (Understanding off-payroll working (IR35); Off-payroll working for intermediaries and contractors providing services to small clients in the private sector).

In practice this means:

• A six-week contract with Client A in April might be assessed quite differently from a ten-week contract with Client B in September, even if your day rate, your limited company, and your way of working feel broadly similar to you.
• The client you're working for at any given time is responsible for making the status determination for that specific engagement, not for your contracting career as a whole.
• You could genuinely have one assignment where the client states the role is inside IR35, and another where the client states it is outside IR35, in the same financial year.

This is why multiple short contracts IR35 questions can't be answered with a single yes or no. Each new contract effectively resets the analysis.

What the PGMOL case tells us about short engagements

Much of the current thinking on status for short, repeated engagements draws on the Supreme Court's decision in the PGMOL case, which concerned football referees engaged match by match. The referees had separate contracts for each individual match, and the court considered mutuality of obligation and control by reference to each individual engagement rather than any overarching umbrella arrangement (Commissioners for HMRC v Professional Game Match Officials Ltd, press summary).

The Supreme Court held that the minimum requirements of mutuality of obligation and control were satisfied in relation to those individual match contracts. Commentary on the judgment is clear that mutuality and control are necessary elements to examine when working out status, but they are not the only factors; the wider picture of how the work is actually carried out still matters.

For contractors with short term contracts outside IR35 claims from a client, the practical lesson from PGMOL is that substitution rights and the degree of control exercised during each specific engagement are central to how status is reasoned through, rather than any assumption that a lack of long-term commitment automatically settles the question.

Multiple clients, multiple agencies: who decides, and who pays?

Things get more complex again if you're working through agencies. HMRC's guidance for clients explains that where a worker contracts through more than one agency, the deemed employer for tax purposes depends on exactly where the qualifying conditions are met in that particular chain of supply (Off-payroll working for clients; Off-payroll working rules for agencies).

There's also a lesser-known technical point for intermediaries: if a single payment covers services provided by two or more workers across different engagements, HMRC's guidance says the income has to be split proportionally when calculating any deemed employment payment (Off-payroll working for intermediaries and contractors providing services to small clients in the private sector). This is a detail worth raising with your accountant if your invoicing structure spans overlapping assignments.

Keeping track across a busy contracting year

If you're moving between several short contracts, a few practical habits can help you stay organised, without this being advice on your own position:

• Request and keep the Status Determination Statement (SDS) for every separate engagement; this is evidence provided by the client about that specific role, not a platform or agency assessment.
• Note that any CEST result a client runs is not determinative on its own; it's one input HMRC says clients can use, not a guarantee of status.
• Keep a short written record of actual working practices for each contract (substitution, control, how the work was supervised), since these are the real facts a specialist or, where relevant, the Fair Work Agency would look at.
• Review your contracts and practices separately each time a new assignment starts, rather than assuming last year's answer still applies.

If you're currently weighing up new assignments, you can browse outside-IR35 contracts or check current day-rate benchmarks to see how different engagements in the market are being described by clients.

Because status is fact-specific and decided engagement by engagement, anyone with several short contracts in the same year should get each one reviewed on its own merits, ideally by a qualified IR35 contract reviewer or contractor accountant, and should direct any employment-rights questions to the Fair Work Agency rather than relying on general guidance like this article.

This platform does not determine, verify, or warrant IR35 status; the SDS is the client's legal responsibility. Contractors should take their own advice and consider IR35 insurance.