An unexpected deduction should be traced to its stated basis: a statutory requirement, a contractual provision, prior written agreement or another lawful exception. Acas explains the rules and exceptions that apply to deductions from wages. [1]
Reconstruct the payslip
Compare gross pay, hours, tax, National Insurance and each separate deduction with the bank payment. Identify whether the problem is a deduction or missing pay in the first place. Record the pay period and when the amount was due.
For training fees, equipment or an alleged overpayment, request the calculation and the term relied on. Check when you received or agreed that term. A label such as 'adjustment' does not explain the legal basis or arithmetic.
Challenge the identified amount
Send payroll a concise breakdown of what you dispute and retain its response. If repayment of a genuine overpayment is proposed, ask about the amount, evidence and a manageable schedule instead of assuming every deduction is unlawful.
Consider minimum wage implications and obtain timely advice if the issue remains unresolved. Final unpaid wages covers termination payments; tribunal time limits matters because an internal payroll query does not automatically protect a claim deadline. Keep repeated deductions listed individually rather than merging them into an undated total.
Establish the amount that was actually due Start with the pay period, hours worked and applicable rate. Check whether the payslip covers a different cut-off period from the rota, especially after a start date, absence or change in hours. List expected basic pay, overtime, commission and other components separately. A short payment caused by missing hours may need a different explanation from an amount earned and then deducted. Keep your calculation transparent so payroll can identify the disputed input rather than responding only that the computer produced the total shown.
Compare the payslip with the bank receipt and note any later correction payment. Gross pay, taxable pay and take-home pay are different figures, so an unexplained difference should not immediately be called a deduction. Ask payroll to explain unfamiliar codes and provide the underlying calculation. If the issue concerns tax or National Insurance, the employer's wage-deduction authority may not be the only question; an HMRC enquiry may also be relevant. Preserve the payslip version originally issued and any corrected document rather than treating the replacement as though no error occurred.
Identify the employer's stated authority Ask which legal requirement, contract term, prior written agreement or exception the employer relies on. Request the actual wording and when it was supplied or agreed. Acas identifies permitted bases for deductions and specific rules affecting particular payments and sectors. [1] A broad description such as company policy does not explain whether the relevant conditions are met. Keep the authority question separate from whether the arithmetic is right: a correctly calculated amount may still require a valid basis, and a permitted deduction may still be calculated incorrectly.
For training or equipment charges, establish what was provided, its cost and the event said to trigger repayment. Check whether the amount reduces over time, whether the training was mandatory and whether the equipment was returned. If the employer alleges damage, request the evidence and the contractual term relied on without conceding responsibility merely to obtain the calculation. Record any minimum wage concern for advice, because the treatment can depend on the type of deduction. Avoid assuming that every deduction taking net pay below a particular figure has the same legal result.
Deal with an alleged overpayment on evidence Request a schedule showing each original payment, the amount said to have been due and the resulting difference. Check whether a tax or pension adjustment is already included so repayment does not duplicate it. An overpayment can be recoverable even without a clause used for other deductions, but the amount still needs to be understood. If you accept a genuine error but cannot manage the proposed recovery, explain the financial effect and ask for a workable repayment arrangement with a clear written balance and schedule.
Where deductions recur, list every affected payday and amount. Keep the reason given for each and whether the same underlying error continues. Do not combine a year's history into a single undated figure. That chronology helps an adviser assess potential claims, applicable time limits and the extent of any recoverable period. A later deduction does not justify assuming that every earlier issue remains actionable. Ask promptly about deadlines while payroll discussions continue, particularly if the employer repeatedly promises to investigate without identifying a resolution date.
Send a challenge that payroll can answer State the pay period, disputed entry, your calculation and the specific documents or correction requested. Attach relevant evidence rather than an unrelated archive of workplace emails. Ask for a response through a recorded channel and retain the date. If the answer resolves only part of the issue, identify the remaining difference and explain why. A clear escalation to the appropriate manager or grievance route is easier when the record shows what payroll was asked, what it supplied and what still cannot be reconciled.
When a correction is agreed, check both the payment and the accompanying records. Confirm whether the employer will issue a revised payslip, adjust deductions or correct later pay. If only part of the amount is paid, record it as partial rather than marking the whole issue resolved. Keep any repayment agreement separate from a waiver of claims and seek advice before signing unfamiliar settlement language. The final file should show the original discrepancy, explanation, agreed remedy and actual result, allowing a remaining dispute to be assessed without repeating the initial calculation.
Frequently asked questions
Is an incorrect number of paid hours always a deduction issue?
It may concern missing pay or an inaccurate input rather than a separately listed deduction. Establish the hours, rate and pay period first.
What evidence should payroll provide for an alleged overpayment?
Ask for the affected periods, amounts paid, amounts properly due and treatment of tax or other adjustments, so the claimed balance can be checked.
Can a training repayment charge raise minimum wage questions?
Yes. The nature of the training and deduction matters. Supply the agreement and calculation when seeking advice rather than relying on the label alone.
Does an ongoing payroll complaint protect a tribunal deadline?
Do not assume it does. Obtain a separate assessment of the relevant pay dates and any conciliation steps while the internal query continues.
How do I record a correction that covers only some deductions?
Match the payment to the specific entries corrected and leave the unresolved amounts visible, with an updated total and supporting explanation.
Official sources
Sources checked: 9 September 2026. Check the linked guidance for subsequent changes.
General information only. The appropriate action depends on your circumstances and the applicable jurisdiction.
Report a correction