Self Assessment and income from employment

Employment income may still need to appear in a Self Assessment return even when PAYE has already deducted tax. Use the correct employment statements and benefits information, and reconcile deductions without assuming the tax code settles every other income source.

Keep separate records for each employer and distinguish reimbursements, taxable benefits and personal pension arrangements. Changes during the year can explain differences between payslips and final statements.

Create a separate record for each employment

List the employers, start and leaving dates and the statements available for the tax year. Include a job held briefly, a second employment and any continuing directorship where relevant. Keep the P60 or P45 linked to the correct employer and period so a payroll transfer or employer name change does not lead to the same earnings being entered twice.

Self Assessment brings the relevant personal information into one return even where PAYE has already operated. ^[1] Treat payroll deductions as evidence to reconcile, not proof that no further assessment is required. The overall position can change when employment income sits alongside business profit, property, pensions or other amounts that were not included in the payroll calculation.

Reconcile pay statements without double counting

Compare annual or leaving statements with the relevant payslips and explain material differences. A final payslip may include a bonus, correction or payment after leaving that needs particular attention. Do not add a P45 total to a P60 total without checking whether the later statement already includes information brought forward from the earlier employment.

Where a statement is missing or appears wrong, contact the employer through an established route and keep the response. Preserve the original document as well as any corrected version. Identify the unresolved issue for the accountant rather than changing a figure manually until it matches an expected tax refund. The aim is an accurate employment record supported by the employer's information and the actual payment history.

Keep benefits and reimbursements distinguishable

Gather the relevant benefits information and explain how the employer has reported or payrolled each item. A company car, private medical cover or other benefit may not appear as an ordinary cash payment into the employee's bank account. Ask the preparer to reconcile the documentation with the employment figures and avoid reporting the same benefit twice through different sources.

Keep reimbursed expenses separate from remuneration and describe any uncertainty about their treatment. Do not assume every payment labelled expenses is outside tax, or that every reimbursement must be added to salary. The particular arrangement and reporting matter. Where information remains with a former employer, request it early enough for the accountant to resolve questions before the return approval date.

Review pension and tax-code information

Identify how pension contributions were made: through payroll, relief at source, salary sacrifice or another arrangement. Supply the relevant statements so any additional relief claim can be assessed without duplicating relief already given. Use Claiming tax relief on pension contributions to organise pension evidence, particularly where more than one employer or provider was involved during the year.

Keep tax-code notices where they help explain deductions or adjustments. A code may incorporate an estimate, benefit or earlier underpayment, but it should not be treated as a substitute for the final annual calculation. If a coding issue is still active, identify it separately from preparing the return. The guide to Disputing a PAYE coding notice addresses questions about a disputed coding notice and the evidence needed to investigate it.

Explain unusual employment events

Flag termination payments, share awards, overseas duties, unpaid leave and changes in working location. Give the adviser the agreement or employer explanation and the relevant dates. A large one-off payment should not be classified from its bank description alone, and cross-border work can require an assessment beyond the ordinary PAYE documents.

For Self Assessment tax return support, provide an employment timeline, source statements, benefits records and a focused discrepancy list. Ask the accountant to explain how tax already deducted enters the overall calculation and which employment-related claims need additional evidence. Keep company matters separate where the employee is also an owner or director; the company's tax return does not replace the individual's review.

Before approval, compare the employment section with the source list to confirm that no short-lived job or late payment was omitted. Retain the approved figures and any explanation of differences from payroll records. This makes a later HMRC query easier to answer and gives the following year's preparer a clear account of unusual items that should not simply recur as ordinary annual income. Check whether any employer correction issued after the tax year changes the documents previously supplied to the accountant, and send the corrected version with a clear explanation.

Illustrative scenario

A marketing manager changes jobs and also lets a flat. Their return pack includes both employment records and the rental schedule, with PAYE deducted shown separately from the income figures.

Preparation checklist

• List every employer
• Gather P60 or P45 records
• Check benefits information
• Reconcile tax deducted