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uk Work & employment crises underpaid last pay period • paid less than expected • short pay on payday • wages missing from payslip • payslip is wrong • incorrect hours on payslip • missing overtime pay • pay rate wrong this month • payroll error underpayment • not paid full wages • shorted on wages • unpaid wages last payday • net pay lower than usual • gross pay incorrect • rota hours not paid • timesheet not processed • bonus or commission missing • unlawful deduction from wages • employer underpaid me

What to do if…
you realise you have been underpaid for the last pay period

Short answer

Check the pay-period numbers (hours/rate/deductions), then raise it with payroll/your manager immediately and get a written confirmation of the shortfall and when it will be paid.

Do not do these things

  • Do not assume it will “sort itself out” next payday without a clear written plan for when and how it will be corrected.
  • Do not sign anything you do not understand (for example, documents about changing hours, pay rate, or deductions) while you’re panicking.
  • Do not accuse anyone of “theft” or “fraud” before you’ve checked whether it’s a payroll mistake.
  • Do not quit on the spot or walk out mid-shift as your first response.
  • Do not accept cash “top-ups”, informal IOUs, or vague promises like “we’ll add it later” without a proper payroll correction.

What to do now

  1. Confirm what’s missing (keep it tight and factual).
    Check your pay information for that pay period (payslip/pay portal/bank payment). Compare: hours paid, hourly rate/salary, overtime, commission/bonus, and deductions. Write down the exact shortfall and the pay period end date.
  2. If you’re entitled to an itemised pay statement and didn’t get one, note that as part of the problem.
    If your pay varies by hours worked, your pay statement should usually show the number of hours paid. If you cannot access a payslip/pay statement at all, screenshot the portal error (if any) and keep the bank payment record.
  3. Gather the minimum proof you’ll need.
    Save: the payslip/pay statement, your contract/offer (rate and pay date), rota/schedule, approved timesheets, clock-in/out records (if available), and messages approving overtime or shifts. Screenshot anything that could change.
  4. Raise it the same day if you can — then create a paper trail.
    Tell payroll or your manager: “I believe I’ve been underpaid by £X for the pay period ending [date]. Please confirm the amount owed and when it will be paid.”
    If you discuss it verbally, follow up with a short email/message confirming what was agreed.
  5. Ask for a specific correction plan (date + amount + payslip fix).
    Ask them to confirm in writing:
    • the calculation (what they think you should have been paid)
    • when they will pay the shortfall (and whether they can pay it before the next payday)
    • how it will appear on your next payslip so tax/NI/deductions are correct
  6. If it’s not fixed promptly, raise a formal grievance in writing.
    Attach the payslip/timesheet/contract and clearly state what you want: payment of the shortfall, corrected payroll records, and written confirmation.
  7. If you might miss deadlines, contact Acas early.
    There are strict time limits. For unpaid/underpaid wages it’s usually 3 months minus 1 day from the date you should have been paid (or, if it happened more than once, from the last underpayment). In most cases you must start Acas Early Conciliation within your time limit before you can make an employment tribunal claim (some claims are exempt).
  8. If the underpayment may take you below the National Minimum Wage, use the minimum-wage route.
    You can make a pay-and-work-rights complaint (which goes to the relevant enforcement body — for minimum wage, that’s HMRC). If you’re also considering other routes (like an unlawful deductions claim), get advice quickly so you don’t miss time limits.

What can wait

  • You do not need to decide today whether to bring a legal claim.
  • You do not need to escalate to senior leadership or threaten a tribunal to fix a one-off payroll error.
  • You do not need to audit every historic payslip right now — stabilise the last pay period first.
  • You do not need to resign or job-hunt in the first wave of panic.

Important reassurance

A short pay packet is destabilising, especially when bills are due. Many cases are payroll/admin errors (hours not processed, rate not updated, deductions misapplied) and are fixable once the right person sees clear figures and documents. Your job is to stay calm, document it, and get a written correction plan.

Scope note

This covers immediate first steps after you notice an underpayment. If it repeats, involves disputed deductions, or affects multiple workers, you may need specialist advice (for example from Acas or a union) on next stages.

Important note

This is general information, not legal advice. Employment situations vary and deadlines can be strict. If you feel pressured, threatened, or are close to a deadline, get independent advice promptly before taking irreversible steps.

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