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Timesheets and temp payroll: what happens between Sunday and Friday

A temp payroll run is a chain across three parties with an immovable deadline at the end of it, which is why one unapproved sheet costs an entire morning. The chasing is the visible part. The expensive part is the reconciliation, because the same hours pay a worker and bill a client, and a mismatch means you have paid out something you cannot invoice.

Last checked 19 September 2026

The chain, in order #

Five links, three parties, one deadline.

  1. The worker records hours

    Usually after the fact, sometimes from memory.

  2. Somebody at the client approves them

    A person whose actual job is something else.

  3. The agency reconciles

    What was approved, against what was booked and what the rate card says.

  4. Payroll runs

    And HMRC is told on or before payday in a Full Payment Submission.

  5. The invoice comes off the same hours

    With a margin the client has agreed.

Each link can only start when the one before it finishes, and only the last two are inside your building. That is the whole problem in a sentence.

The approver is a site supervisor, a ward manager, a shift lead or an office manager. Approving agency hours is not in their objectives, it lands at their busiest hour of the week, and the consequence of ignoring it falls on somebody else.

Add a site where nobody is at a desk, a supervisor on leave with no named deputy, and an approval route that exists in one person's memory, and you have a queue that regenerates every week.

The queries make it worse. Half an hour of overtime nobody logged. A shift that was covered by somebody else. A bank holiday at a different rate. A worker who did Tuesday at one site and Thursday at another on two different rates. None of these is hard. All of them need a person to look at two records and decide which is right.

The rate card is where the money leaks #

Most temp desks do not lose money on the headline rate. They lose it in the corners: an overtime threshold applied to the wrong base, a rate uplift agreed by email and never written into the schedule, a bank holiday paid at one multiple and billed at another. The reason those survive is that pay and bill are reconciled by hand, at speed, on a deadline, by somebody who is also chasing four missing sheets.

Statutory floors sit underneath all of it. These are the rates from 1 April 2026.

£12.71

National Living Wage, 21 and over

GOV.UK, from 1 April 2026

£10.85

18 to 20 year olds

GOV.UK, from 1 April 2026

£8.00

under 18s and apprentices

GOV.UK, from 1 April 2026

Minimum wage is enforced by the Fair Work Agency, which replaced the Employment Agency Standards Inspectorate and also covers employment agency standards.

Two dates that have to be tracked, not remembered #

The Key Information Document. Under regulation 13A of the Conduct Regulations, an employment business must give a work-seeker a Key Information Document before agreeing terms, on no more than two sides of A4. If details change, a revised document is due within five business days.

What a Key Information Document has to cover

The rate or minimum expected rate, how often pay is made, deductions and fees, holiday entitlement and a representative example of gross pay, deductions and net pay.

Every payslip a worker receives is implicitly compared against that document, and the mismatch arrives as a phone call.

The twelve week qualifying period. Regulation 7 of the Agency Workers Regulations 2010 sets a qualifying period of 12 continuous calendar weeks in the same role with the same hirer, across one or more assignments, with breaks of no more than six weeks disregarded when working out continuity.

That is a counting problem with exceptions, on a per worker per role basis, that determines pay. Counting problems with exceptions are exactly the kind of thing a person does badly and a system does well.

Which parts run on rules #

Runs on rules

  • Knowing which sheets are outstanding right now, given the booking data already exists
  • Reminding a worker to submit
  • Reminding an approver, and escalating on a schedule
  • Comparing submitted hours to booked hours and flagging differences
  • Applying a rate card, including overtime and bank holidays, if the rate card is written down properly
  • Counting continuous weeks towards a qualifying period

Flagging a mismatch is rules. Resolving it is not.

Needs a person

  • Deciding who is right when the worker and the site disagree
  • Deciding whether to pay a disputed shift while you sort it out. A commercial and relationship call
  • Explaining a deduction to somebody who is upset about it

What this is really worth measuring #

Count two things for a month. How many hours the desk spends chasing and reconciling, and how many pay and bill discrepancies you find after the run rather than during it.

The second number is usually the one that pays for any change, and it is the one nobody tracks. The free tools will help with the first, and the free audit covers the whole week, including the compliance chase that competes for the same Monday morning.

Questions people ask

Why does one missing timesheet hold up a whole payroll run?
Because the run is a chain, not a set of independent jobs. Hours have to be submitted, approved by somebody at the client, reconciled against the booking, priced against a rate card and then paid, and the same data raises the invoice. A single unapproved sheet stops the reconciliation, and the deadline at the end of the chain does not move.
Does a late timesheet change our reporting obligations to HMRC?
No. GOV.UK sets out that every time you pay employees you report their pay and deductions to HMRC in a Full Payment Submission, on or before payday. The chasing is your problem, the deadline is not negotiable, and that asymmetry is what makes Monday morning what it is.
What has to be in a Key Information Document?
Regulation 13A of the Conduct Regulations 2003 requires an employment business to give a work-seeker a Key Information Document before agreeing terms. It must cover the type of engagement, who pays, the rate or minimum expected rate, how often pay is made, deductions and fees, any non-monetary benefits, holiday entitlement, and a representative example showing gross pay, deductions and net pay. It has to fit on two sides of A4, and a revised one is due within five business days if the details change.
What changes after 12 weeks on an assignment?
Regulation 7 of the Agency Workers Regulations 2010 sets a qualifying period of 12 continuous calendar weeks in the same role with the same hirer, across one or more assignments, after which further rights apply. Breaks of no more than six weeks can be disregarded when working out continuity, which is why the count is harder than it sounds and why it is worth tracking rather than remembering.

Where these numbers come from

  1. Conduct of Employment Agencies and Employment Businesses Regulations 2003, regulation 13A , read 19 September 2026 . Key Information Document, inserted 6 April 2020, maximum two sides of A4, revised version within 5 business days of a change.
  2. Agency Workers Regulations 2010, regulation 7, qualifying period , read 19 September 2026
  3. GOV.UK, Running payroll , read 19 September 2026 . Report pay and deductions to HMRC in a Full Payment Submission on or before payday.
  4. GOV.UK, National Minimum Wage and National Living Wage rates , read 19 September 2026 . From 1 April 2026: £12.71 for workers aged 21 and over, £10.85 for 18 to 20, £8.00 under 18 and for apprentices.
  5. GOV.UK, Fair Work Agency , read 19 September 2026

Last checked 19 September 2026.

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