Most recruitment agencies treat the Agency Workers Regulations as a date sum: assignment start date plus 12 weeks equals the day equal treatment kicks in. That sum is right, but it is not the hard part. The hard part is proving it, because the 12-week clock does not run on one timesheet in one system. It runs on continuous weeks in the same role with the same hirer, however many agencies supplied the worker during that period, with specific rules about which breaks pause the clock and which reset it to zero.
What the regulations actually cover
The Agency Workers Regulations 2010 (SI 2010/93) came into force on 1 October 2011, implementing the EU's Temporary Agency Work Directive. They bind three parties: the temporary work agency, the hirer the worker is placed with, and the worker. An "agency worker" is someone supplied by an agency to work temporarily under a hirer's supervision and direction, with a contract to perform the work personally. Someone who is genuinely self-employed, engaged as a client or customer of their own business rather than an agency worker, falls outside the definition. So does a placement that is not actually temporary: in Moran v Ideal Cleaning Services, the Employment Appeal Tribunal held that the regulations only protect workers supplied on a temporary basis, so an indefinite, open-ended placement fell outside their protection entirely, whatever the worker's contract called them.
Two rights apply from day one of an assignment, before any qualifying period starts. The hirer has to give the worker access to its own collective facilities and amenities on the same terms as a comparable employee: a staff canteen, childcare, workplace transport, car parking, a common room. This covers what the hirer itself provides on-site, not third-party benefits like an external gym membership. The hirer also has to tell the worker about relevant vacancies, though a general notice board or intranet posting satisfies that duty; there is no obligation to notify every worker individually, and a 2015 tribunal case, Coles v Ministry of Defence, confirmed this is a right to be told about a vacancy, not a right to be considered for it ahead of the hirer's own staff.
The 12-week clock, and what it actually buys
Once a worker has completed 12 continuous calendar weeks in the same role with the same hirer, they become entitled to the same basic pay and working conditions as a comparable employee recruited directly. That entitlement covers pay, the duration of working time, night work, rest periods, rest breaks and annual leave. It stops there. Occupational sick pay, pension contributions, redundancy pay and most bonus or share schemes are excluded by the regulations themselves, and a 2022 Court of Appeal case, Kocur v Angard Staffing Solutions, confirmed that equal treatment does not extend to being offered the same number of contracted hours as a comparable employee. Equal treatment is about the terms attached to the hours worked, not a guarantee of the same volume of work.
Any week in which work happens at all, even a single hour of it, counts as a full qualifying week. Weeks do not need to be consecutive shifts of identical length, and they can be accrued across more than one assignment, including assignments run through different agencies supplying the same hirer. A worker can also be building qualifying weeks with one hirer while separately accruing time with a different hirer at the same time, each on its own independent clock. None of this shows up on a single agency's own timesheet history unless something is specifically tracking it across the whole relationship.
Breaks that pause the clock, and breaks that reset it
A break of six calendar weeks or less, for any reason, pauses the clock rather than resetting it. When the worker returns to the same role with the same hirer, the weeks already worked carry forward. Longer breaks also preserve continuity in specific circumstances: up to 28 weeks for sickness or injury, up to 28 weeks for jury service, a pregnancy or maternity-related protected period, statutory or contractual leave, an established shutdown such as a fixed Christmas closure, or industrial action at the hirer's premises. Any break that does not fall into one of these categories, once it passes six weeks, resets the qualifying period to zero.
The rule that trips agencies up most often is not the six-week threshold itself, it is combining break types incorrectly. The regulations require the whole gap to fit within a permitted category, not just part of it, so a break made up of partial sickness and a partial general absence has to be assessed as one continuous gap, not two separately-forgiven pieces. The other recurring pitfall is assuming a change of department, site or line manager resets the clock on its own. It does not. Only a role with substantively different duties resets it, and even then only if the agency has told the worker in writing that the new role is different before the change takes effect. Without that written notice, the previous role's weeks still count, whatever the informal record-keeping shows.
What actually proves compliance
None of this is captured by a single database the regulations specify. It has to be reconstructed from the agency's own records: who worked, for which hirer, in which role, on which dates, and the date and reason for every gap. That reconstruction is why a spreadsheet-and-email approach to temp desks tends to fail quietly rather than obviously. It is not that anyone ignores the 12-week rule, it is that the record needed to apply it correctly, across every hirer, every role and every break, is scattered across timesheets, emails and memory by the time a dispute or a written statement request lands.
The REC's own guidance to agencies reflects this: it recommends asking a worker at registration whether they have previously worked in the same role for the same client, asking the client directly whether the worker has held any previous role with them, and checking regularly where a worker is placed only part of the week or irregularly. All three exist because a client does not reliably keep its own record of who has worked for it, and an agency that only tracks its own assignments cannot see a worker's full history with that hirer through another supplier.
Regulation 16 gives a worker who believes they were not treated equally the right to request a written statement covering the basic conditions applied and how they compare to a comparable employee. The agency has 28 days to answer; if it does not, the worker can put the same request to the hirer directly. A tribunal can draw an adverse inference from an evasive or missing response, which is a direct incentive to be able to produce the record on request rather than reconstruct it under pressure.
This sits alongside a second, separate regime. Under the Conduct of Employment Agencies and Employment Businesses Regulations 2003, agencies have their own general record-keeping duties to the regulator, independent of the Agency Workers Regulations: records about hirers and placements normally have to be kept for at least a year after the agency last worked with them, and produced within two business days of a request. Since April 2020, agencies also have to give workers a key information document before agreeing terms, setting out the contract type, the pay rate, how they are paid and their holiday entitlement, in no more than two sides of A4. None of this replaces the 12-week record an agency needs for its own protection; it is the minimum the regulator expects regardless of whether an equal-treatment dispute ever arises.
Enforcement runs through the worker, not a regulator
There is no standalone body that inspects agencies for Agency Workers Regulations compliance the way HMRC checks minimum wage. The 12-week equal-treatment right is enforced by the worker bringing a claim to an employment tribunal against the agency, the hirer, or both, normally within three months of the breach. Where a tribunal finds a breach of the equal-treatment right, compensation cannot be less than two weeks' pay unless it decides that is not just and equitable, and there is no upper limit. Where an agency and hirer deliberately structure assignments, through repeated short breaks or rotating roles, specifically to stop a worker reaching 12 weeks, a tribunal can add up to £5,000 in compensation on top of the standard award. Where both the agency and the hirer are found responsible, the tribunal apportions the compensation between them according to how responsible each was, which means an agency's own records are what it has to rely on if it wants to show the failure sat with the hirer, not with it.
The wider enforcement picture is shifting around this. The Fair Work Agency, which became operational on 7 April 2026, now enforces minimum wage, holiday pay, statutory sick pay and employment agency regulation from one body. It does not appear to have taken on direct enforcement of the 12-week equal-treatment right itself, which remains a tribunal-only route. Separately, the Employment Rights Act 2025 is extending guaranteed-hours and shift-notice protections to agency workers, with the hirer responsible for offering them, phasing in from October 2026. Neither change replaces the Agency Workers Regulations; both sit alongside them, and both make an agency's ability to answer "who worked where, and for how long" more consequential, not less.
Where this comes up
This is a data problem before it is a legal one. The moment a business is supplying temporary and contract staff to multiple hirers, the question of who is approaching 12 weeks, on which clock, is only answerable from accurate timesheet and assignment records, kept in one place rather than reconstructed from memory when a written statement request arrives. We build Clockcheck to read and key timesheets accurately for exactly this reason: the record that proves what was actually worked is the same record the Agency Workers Regulations ask an agency to produce.
If your temp desks are tracking this across spreadsheets and inboxes and you want an honest look at where that breaks down, talk to us. Bring an actual example, not a description of the process.
A few useful questions.
What is the 12-week rule under the Agency Workers Regulations?
Does a short break reset the 12-week clock?
Who is liable if an agency worker is not given equal treatment after 12 weeks?
Sources and further reading
