Agency workers are one of the most flexible parts of the UK labour market — yet their holiday rights are frequently misunderstood by hirers, agencies, and the workers themselves. The Agency Workers Regulations 2010 (AWR) set out the legal framework, but holiday entitlement actually starts from day one of an assignment, not after 12 weeks. This guide explains exactly what agency workers are entitled to, who is responsible for paying it, and how recent changes to rolled-up holiday pay affect both agencies and hirers.
The Agency Workers Regulations 2010 (AWR) came into force on 1 October 2011 and are the primary piece of legislation protecting agency workers in the UK. Their core purpose is to ensure that agency workers receive equal treatmentwith directly employed staff after a qualifying period — but certain basic rights, including holiday entitlement, apply from the very first day.
The AWR define an "agency worker" as someone who has a contract with a temporary work agency (the "agency") and is supplied to work temporarily under the supervision and direction of a "hirer" (the end client). The Regulations create a triangular relationship between three parties:
The AWR sit alongside the Working Time Regulations 1998, which provide the baseline statutory holiday entitlement of 5.6 weeks for all workers — including agency workers — from day one.
One of the most common misconceptions about agency worker holiday rights is that workers must complete the 12-week qualifying period before they become entitled to any holiday. This is wrong.
Under the Working Time Regulations 1998, all workers — including agency workers — are entitled to 5.6 weeks (28 days for someone working 5 days per week) of paid annual leave from the first day of employment. This is a statutory minimum that cannot be contracted out of, and it applies regardless of whether the worker has reached the 12-week qualifying period under the AWR.
For agency workers who work irregular hours or are on short assignments, the entitlement is calculated on a pro-rata basis. The simplest method is to express it as 12.07% of hours worked — this percentage represents 5.6 weeks divided by the remaining 46.4 working weeks in the year.
Holiday accrual = Hours worked × 12.07%
Example: An agency worker who works 200 hours in a quarter accrues 200 × 0.1207 = 24.14 hours of paid holiday.
For a detailed breakdown of how to calculate holiday for workers with variable hours, see our holiday pay calculation guide.
While holiday entitlement starts from day one, the broader equal treatment rights under the AWR only kick in after the agency worker has completed 12 calendar weeks in the same role with the same hirer. After this point, the worker is entitled to the same basic working and employment conditions as if they had been recruited directly by the hirer.
Equal treatment covers:
The qualifying period is measured in calendar weeks, not working days or hours. A week counts if the agency worker does any workduring that week for the same hirer in the same role. The clock does not reset for short breaks — a break of up to 6 weeks will "pause" the clock rather than restart it. However, a break of more than 6 weeks (except for certain protected reasons such as sickness, jury service, or maternity) will reset the count to zero.
Certain breaks are treated as if the worker continued working and do not pause or reset the clock. These include:
Some hirers have historically tried to avoid triggering the 12-week threshold by rotating agency workers between different roles or moving them to a different team. The Regulations specifically prohibit this: if the most likely reason for restructuring the arrangement is to prevent the worker from qualifying for equal treatment, the 12-week clock is not reset.
The division of responsibility between the agency and the hirer is one of the trickiest aspects of the AWR. In general:
| Obligation | Responsible party |
|---|---|
| Paying holiday pay | The agency (as the contractual employer) |
| Providing equal treatment information | The hirer (must tell the agency what comparable direct employees receive) |
| Access to collective facilities | The hirer (from day 1) |
| Vacancy information | The hirer (from day 1) |
| Determining pay after 12 weeks | Shared — the hirer provides pay data, the agency implements it |
| Record-keeping for holiday | The agency (but hirers should keep their own records too) |
If an agency worker brings a tribunal claim for breach of the equal treatment provisions, the agencyis the primary respondent. However, the hirer can be joined as a party if they failed to provide the necessary information about comparable employees' terms.
In practice, hirers should not assume that the agency is handling everything correctly. Both parties have obligations, and hirers that fail to provide accurate pay comparator data can find themselves liable.
Rolled-up holiday payis the practice of including a holiday pay element within the worker's regular pay, rather than paying them separately when they take time off. Historically, this was considered unlawful by the courts because it was seen as discouraging workers from actually taking their leave.
However, from 1 January 2024, following amendments introduced by the Employment Rights (Amendment, Revocation and Transitional Provision) Regulations 2023, rolled-up holiday pay is now explicitly lawful for irregular-hours workers and part-year workers. This is particularly relevant for agency workers, who frequently fall into these categories.
When an agency applies rolled-up holiday pay, the worker receives an additional 12.07% on top of their basic pay in every pay period. This percentage represents the statutory holiday entitlement (5.6 weeks out of a 52-week year). For example:
Rolled-up pay = Basic rate × 1.1207
Example: £12.00/hour basic → £12.00 × 1.1207 = £13.45/hour inclusive of holiday pay.
When the worker takes holiday, they are not paid again — they have already received the holiday pay element in their regular wages. The agency mustclearly itemise the holiday pay element on the worker's payslip so the worker can see what they are receiving.
Calculating holiday pay for agency workers can be more complex than for permanent staff, particularly when the worker has variable earnings. The rules depend on whether the worker has completed the 12-week qualifying period.
Before the 12-week threshold, holiday pay is calculated based on the worker's average weekly earnings over a reference period. Since April 2020, the statutory reference period is the previous 52 weeks in which the worker was paid (ignoring weeks with no pay). If the worker has been employed for fewer than 52 weeks, use the number of complete weeks they have worked.
The calculation should include:
Once the agency worker qualifies for equal treatment, their holiday pay must reflect what a comparable direct employee of the hirer would receive. If the hirer pays direct staff a higher rate, or includes additional elements (such as shift premiums) in their holiday pay calculation, the agency worker must receive the same.
The hirer is obliged to provide the agency with the necessary pay information for comparable roles. If the hirer fails to do so, they may share liability for any underpayment.
Understanding the distinction between these three categories is essential, because each has different holiday rights:
| Category | Holiday entitlement | AWR apply? |
|---|---|---|
| Agency worker | 5.6 weeks from day 1; equal treatment after 12 weeks | Yes |
| Fixed-term employee | 5.6 weeks from day 1; same rights as permanent employees from day 1 | No (covered by Fixed-Term Employees Regulations 2002) |
| Self-employed contractor | No statutory holiday entitlement | No |
The key distinction is the triangular relationship. An agency worker is supplied by an agency to a hirer and works under the hirer's supervision but is paid by the agency. A fixed-term employee has a direct contract with the employer, while a genuinely self-employed contractor is in business on their own account.
Misclassification is a common problem. If someone is labelled as "self-employed" but in practice works under the hirer's direction, is paid through an agency, and has no real autonomy over how the work is done, they may in fact be an agency worker entitled to full AWR protections. Tribunals look at the reality of the arrangement, not just the label on the contract.
Before April 2020, agencies could use a mechanism known as the Swedish derogation(or "pay between assignments" contract) to opt out of the equal treatment provisions on pay. Under these contracts, the agency agreed to pay the worker a minimum amount between assignments, and in exchange, the worker gave up their right to equal pay after 12 weeks.
The Swedish derogation was abolished on 6 April 2020by the Agency Workers (Amendment) Regulations 2019, following the Taylor Review's recommendation that it was being used to undermine workers' rights. Any Swedish derogation clauses in existing contracts became void on that date.
If you are still working under a contract that references a Swedish derogation, that clause is no longer enforceable. You are entitled to full equal treatment after 12 weeks in the same role.
Despite clear legal requirements, agency workers frequently encounter problems with their holiday rights. The most common issues include:
Agency workers who believe their rights are being breached can raise a grievance with the agency, contact ACAS for early conciliation, or bring a claim to an employment tribunal. Claims must normally be brought within 3 months less 1 day of the alleged breach.
Accurate record-keeping is essential for both agencies and hirers to demonstrate compliance with the AWR and the Working Time Regulations.
Both parties should retain records for at least 6 years (the standard limitation period for breach of contract claims), though tribunal claims under the AWR have a shorter 3-month time limit.
Many agency workers take on multiple assignments — sometimes with different hirers simultaneously, sometimes with the same hirer across different roles. Tracking the 12-week qualifying period and holiday accrual across multiple assignments adds significant complexity.
Key points to remember:
For agencies managing large numbers of workers across multiple clients, manual tracking in spreadsheets quickly becomes unmanageable and error-prone. This is where purpose-built leave management software becomes essential.
Managing leave for agency and temporary workers alongside permanent staff is one of the most common pain points for HR teams, particularly in industries with high agency usage such as warehousing, manufacturing, hospitality, and healthcare. LeaveApprove provides the tools to handle this complexity without spreadsheets or guesswork:
Whether you are an agency managing hundreds of temporary workers or a hirer that regularly brings in agency staff, LeaveApprove ensures that holiday entitlements are calculated correctly, tracked transparently, and fully compliant with the AWR and Working Time Regulations.