What Is a Timesheet? UK Guide, Rules and Examples | Quantim
📄 UK guide · Updated October 2026

What Is a Timesheet?

A timesheet is a record of the hours a person has worked over a set period, broken down by day and usually by project, task or client. Employers use timesheets to run payroll, invoice clients, track project costs and evidence compliance with working time and pay rules. Timesheets are kept on paper, in a spreadsheet or in a digital system.

A timesheet is sometimes written as two words, time sheet. The two mean the same thing. Rather than describe one, the quickest way to understand what a timesheet is for is to fill one in.

Try it

Fill in a week and see what it tells you

This is a timesheet. Change any number and watch the four figures on the right. They are the reason a practice asks you to fill one in, and none of them can be worked out from a payslip.

DayHours worked

Utilisation here is chargeable hours as a share of the hours actually recorded, not of contracted hours. Both definitions are in use and they give different answers, so check which one your practice means.

Recorded this week

Utilisation, chargeable over recorded

What the chargeable hours invoice at

Recorded but not billed
The detail

What goes on one, and which kind to use

Three questions people ask next. Pick one.

What must be on a timesheet

UK law prescribes no format at all, which surprises people. What it requires is that the records are adequate. The second group below is not a legal matter: it is what turns a payroll record into something that can cost and invoice a job.

  • Worker name, and the period covered
  • Each date worked, with start and finish times
  • Unpaid break minutes, and the net hours
  • Who approved it, and when

Types of timesheet

The period is mostly a trade between accuracy and effort. The shorter it is, the better the data and the more often somebody has to chase it.

  • Weekly suits most professional services firms
  • Daily suits site work, shifts and agency staff
  • Monthly is too coarse to manage a job in flight

Paper, spreadsheet or digital

All three are lawful. They differ in what they cost you, and the cost is mostly not in the entering. The decisive row is the last one: six year retention plus the single document duty is what makes a drawer of paper expensive, usually at the worst moment.

A closer look

The four columns that do the work

A real week for a part qualified architect. Pick a numbered point to see why that column is there.

Four points on this screen.

    The rest of it

    The questions that come next

    Timesheet and time sheet are the same word, and both spellings are correct. The other three are genuinely different things.

    • Time card or clock card. Attendance at a place, not what was done.
    • Job sheet. The work carried out on one job, often with materials. Organised around the job, not the person.
    • Attendance register. Presence only, no hours, no allocation of effort.

    A time card can evidence working time. It cannot cost a project.

    Three roles. The worker records, because only they know what they did. An approver checks, usually a line manager or project lead. The employer keeps the record, and carries the legal duty to do so.

    Salaried staff are commonly asked to complete them, and it catches people out. A salary settles what someone is paid. It says nothing about what their time costs a particular job, so the requirement usually has nothing to do with payroll at all.

    Your entries are reviewed by an approver, then used in two places at once. Payroll uses them to calculate or evidence your pay. Finance uses them to work out what each job cost and what can be invoiced. That is why you are asked for a project code and not just a total.

    If an approver changes an entry you are entitled to ask why, and a well run system records who changed what. Raise it before the period closes: once the hours have been invoiced, correcting them stops being internal.

    Most timesheets record decimal hours, so 7 hours 30 minutes is written 7.50 and not 7.30. To convert, divide the minutes by 60.

    So 10 minutes is 0.17 of an hour, since 10 divided by 60 is 0.1666. On a system that rounds to the nearest tenth of an hour it becomes 0.2, and on one that rounds to the nearest quarter hour it becomes 0.25. All three can be correct. Which applies depends on the rounding rule your employer has written down, and it must be written down: a six minute grid cannot express a quarter of an hour, so 15 minutes is either 0.2 or 0.3 on it, never 0.25.

    Use the hours worked calculator, or see the full minutes to decimal table.

    1. Reading 7.30 as 7 hours 30 minutes. It is 7 hours 18 minutes. Twelve minutes an entry, every entry.
    2. Filling the week in on Friday. Recall fades, and the hours that vanish are the small chargeable ones.
    3. No project code. Hours without a job reach payroll and stop.
    4. Leaving the chargeable flag to the invoicer. Decided weeks later by somebody who was not there.
    5. Rounding in one direction. Always up will not survive a client query. Always down gives work away.
    6. Treating approval as a formality. An unchecked record is a claim, and worth little when a fee is disputed.
    FAQ

    Questions people ask

    What is a timesheet? ▾
    A timesheet is a record of the hours a person has worked over a set period, broken down by day and usually by project, task or client. Employers use timesheets to run payroll, invoice clients, track project costs and evidence compliance with working time and pay rules. Timesheets are kept on paper, in a spreadsheet or in a digital system.
    Is a timesheet a legal requirement in the UK? ▾
    No. No UK law requires an employer to use a timesheet, and none prescribes a format for working time records. What the law requires is records. The Working Time Regulations 1998 require records adequate to show compliance with the working time limits, and the National Minimum Wage Regulations 2015 require records sufficient to establish that a worker is paid at least the minimum wage. A timesheet is one convenient way to meet both duties, not a duty in itself.
    How long must a UK employer keep timesheet records? ▾
    It depends which duty the record serves. Working time records must be retained for two years from the date they were made, under regulation 9 of the Working Time Regulations 1998. Minimum wage records must be kept for six years, under regulation 59 of the National Minimum Wage Regulations 2015, beginning with the day on which the pay reference period following the one they relate to ends. Annual leave records must be kept for six years under regulation 16B. In practice most employers keep the lot for six years.
    What must be included on a timesheet? ▾
    No format is prescribed in law, but a record that will stand up needs the worker's name, the period covered, each date worked, start and finish times, any unpaid break, the net hours, and evidence of approval. A professional services firm adds the project or job code, the activity, and whether the time is chargeable, because those are what turn hours into a fee.
    What is the difference between a timesheet and a time sheet? ▾
    There is none. Timesheet and time sheet are the same word written two ways, and both are in common use. A time card or clock card is different: it records attendance at a place rather than work done on a job. A job sheet records the work carried out on one job, often including materials, rather than one person's week.
    What is 10 minutes on a timesheet? ▾
    Ten minutes is 0.17 of an hour, because 10 divided by 60 is 0.1666. On a system that rounds to the nearest tenth of an hour it is recorded as 0.2, and on one that rounds to the nearest quarter hour it becomes 0.25. Which of the three is correct depends entirely on the rounding rule your employer has set.
    Who fills in a timesheet? ▾
    Three people have a part in it. The worker records their own time, because only they know what they actually did. An approver, usually a line manager or project lead, checks and signs it off. The employer owns the record and carries the legal duty to keep it. Salaried staff are commonly asked to complete timesheets too, because the record exists to cost and bill the work, not only to calculate pay.
    Do salaried employees need to fill in timesheets? ▾
    Often yes. A salary fixes what someone is paid, not what their time costs a project. Architecture, engineering, surveying and consultancy firms need salaried hours recorded against jobs so they can see the cost of the work, invoice on time spent and measure utilisation. Completing a timesheet can be a reasonable management instruction under the contract of employment.
    When the paperwork outgrows the paper

    Timesheets that reach the invoice

    You have just filled in one week for one person. Quantim does it for everybody, against the job, and carries the hours through to cost and fee without anyone rekeying them.

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