For many individuals, income tax obligations extend beyond what is deducted through payroll. Whether it's rental income, investments, overseas earnings or income linked to international assignments, a UK Self-Assessment tax return may be required.
With the 31 January 2027 deadline for filing and paying tax for the 2025/26 tax year approaching, now is the time for individuals and employers to prepare. Early action can help avoid last-minute stress, reduce compliance risks and prevent unnecessary penalties.
Who Needs to File?
A UK tax return may be required for individuals who:
For globally mobile employees, tax obligations can become particularly complex where income, benefits and workdays span multiple countries.
The Key Date: 31 January 2027
The critical deadline for the 2025/26 tax year is 31 January 2027.
By this date, taxpayers must:
Missing the deadline can result in penalties and interest charges. Self-Assessment tax returns: Deadlines confirms that online tax returns and any tax due must be submitted by 31 January following the end of the tax year.
Why Employers Should Take Notice
While tax filing is an individual's responsibility, employers often play an important role in supporting compliance, particularly for expatriates, international assignees and remote workers.
Challenges can arise when managing:
Ensuring payroll data is accurate and compliant can help employees meet their tax obligations more effectively and reduce organisational risk.
How activpayroll Can Help
At activpayroll, we support organisations with global payroll, mobility and compliance solutions that help simplify complex workforce challenges.
Whether you're managing internationally mobile employees, strengthening payroll controls or navigating changing regulatory requirements, our specialists provide practical support to help maintain compliance and reduce risk.
Interim UK Payroll Support
Periods of change can place significant pressure on payroll teams. Our Interim UK Payroll Support service provides flexible payroll expertise to maintain continuity during periods of change, helping organisations manage payroll operations confidently during resource gaps, projects or business transitions.
Strengthen UK Payroll Compliance
Our Strengthen UK Payroll Compliance service provides a review of payroll processes to improve accuracy, compliance and control. By identifying areas for improvement and reducing potential risks, organisations can strengthen payroll governance and increase confidence in their compliance position.
Final Thoughts
The 31 January 2027 UK income tax filing deadline should already be on the radar of individuals, employers and payroll professionals. Preparing early can help avoid penalties, reduce administrative burdens and ensure tax and payroll obligations are managed effectively.
With the right support and processes in place, organisations can help their employees stay compliant while maintaining confidence in their payroll operations.