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What to do if…
your paycheck is much lower than expected and you cannot explain the shortfall

Produced and maintained by PanicStation.org Published: Last reviewed: Editorial policy UK guide

Short answer

Save your payslip and bank payment record, compare them with the pay you expected, and ask payroll or your employer for a written calculation and explanation. If the shortfall puts essential payments at risk, contact those providers before the payments are missed.

Do not do these things

  • Do not resign, stop attending work, or make another major employment decision while you are checking what happened.
  • Do not assume the difference is only tax or that it will correct itself automatically.
  • Do not rely only on a verbal explanation; ask for the figures and any proposed correction in writing.
  • Do not delete or alter payslips, timesheets, rotas, bank records, emails, or messages connected with your pay.
  • Do not send passwords, security codes, or full banking login details to anyone investigating the shortfall.
  • Do not rush into high-cost borrowing before asking whether an error can be corrected promptly.

What to do now

  1. Download or photograph the payslip and save a record of the amount that reached your bank account. Keep copies somewhere you can access outside your workplace systems.

  2. Compare the net pay on the payslip with the amount received. If they differ, note the exact difference and ask your employer to confirm how much was sent, when it was sent, and which account details were used.

  3. Check the pay period shown on the payslip. Compare it with your contract or written statement, rota, timesheets, approved overtime, holiday, sickness, unpaid leave, bonus, commission, and any recent change to your hours or rate.

  4. Compare the payslip with the previous one. Write down every changed figure, including gross pay, hours, rate, tax, National Insurance, pension contributions, student loan deductions, salary sacrifice, court-ordered deductions, and recovery of any earlier overpayment.

  5. Check whether hours, overtime, expenses, commission, or other payments had to be submitted or approved before a payroll cut-off. Ask when anything submitted after that cut-off is due to be paid.

  6. Contact payroll, HR, your manager, or whoever handles wages. State the pay date, the amount expected, the amount received, and the unexplained difference. Ask for:

    • the calculation of your gross pay
    • an explanation of every unexpected deduction
    • confirmation of any omitted hours or payments
    • confirmation of whether an error occurred
    • the date and method of any corrective payment

  7. Keep the request and response in writing. After any phone or in-person conversation, send a brief message recording what was discussed and any date or action that was agreed.

  8. If the tax code or Income Tax deduction changed, compare the tax code with your previous payslip and check your current details through HMRC. Speak to your employer about the figures used in payroll and HMRC about information held on your tax record or tax code.

  9. If the shortfall affects food, housing, energy, medication, or necessary travel, list only the payments due soon. Contact the relevant provider before a payment is missed and explain that an unexpected wage shortfall is being investigated.

  10. If your employer does not explain or address the shortfall promptly, contact your trade union or an employment adviser. Acas provides guidance for England, Scotland, and Wales; the Labour Relations Agency provides guidance in Northern Ireland. Seek advice promptly because formal claims about unpaid wages can have short time limits.

What can wait

You do not need to decide immediately whether to resign, submit a formal grievance, start a tribunal claim, change bank accounts, or reorganise your entire budget. First establish what should have been paid, what was actually paid, why the figures differ, and whether the employer will correct them.

Do not leave the issue unresolved indefinitely. Get specialist advice promptly if your employer does not provide a clear explanation or corrective payment.

Important reassurance

A lower payment can result from a payroll mistake, missing hours, a payroll cut-off, a changed tax code, or an unexpected deduction. You do not have to identify the cause before asking your employer for a clear written calculation.

Scope note

This guide covers the immediate steps for checking and responding to an unexplained wage shortfall. Later action may require help from a trade union, Acas, the Labour Relations Agency, HMRC, a money adviser, or another specialist.

Important note

This is general information, not legal, financial, tax, or professional advice. The correct route may depend on your employment status, contract, location within the UK, the type of deduction, and when the shortfall occurred.

Additional Resources

Closely connected guides that may be useful during the same situation or its immediate aftermath.

About this guide

This guide was produced and is maintained by PanicStation.org using its published editorial process. Official and specialist sources are checked where relevant, and AI-assisted tools may be used for drafting, organisation, and consistency checks. The site operator remains responsible for publication, revision, and removal decisions.

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