Compliance
Payroll Changes for Employers: P9X Codes & Basic PAYE Updates for Tax Year 2026/27
Employers: new tax code rules from 6 April 2026 bring updated allowances and critical steps—get payroll ready now to stay compliant.
By NomadicTax Research Team • 5-8 min read • June 13, 2026
## What Are P9X Tax Codes?
HMRC issues **P9X**, a set of recommended tax codes that employers should use from **6 April 2026** for the 2026-27 tax year. These codes ensure correct deductions for Income Tax and National Insurance across PAYE schemes.([gov.uk](https://www.gov.uk/government/publications/p9x-tax-codes/p9x-tax-codes-to-use-from-6-april-2026?utm_source=openai)) The announcement details how to handle employees with no changes, those with new tax codes, and those leaving or joining during the year.([gov.uk](https://www.gov.uk/government/publications/p9x-tax-codes/p9x-tax-codes-to-use-from-6-april-2026?utm_source=openai))
## Key Updates for Tax Year 2026/27
- **Personal Allowance** stays at **£12,570** for the whole UK.([gov.uk](https://www.gov.uk/government/publications/p9x-tax-codes/p9x-tax-codes-to-use-from-6-april-2026?utm_source=openai))
- **Weekly threshold for PAYE**: £242; **monthly**: £1,048.([gov.uk](https://www.gov.uk/government/publications/p9x-tax-codes/p9x-tax-codes-to-use-from-6-april-2026?utm_source=openai))
- The **emergency code** (for situations where PAYE determination isn't fully known) remains **1257L**.([gov.uk](https://www.gov.uk/government/publications/p9x-tax-codes/p9x-tax-codes-to-use-from-6-april-2026?utm_source=openai))
## What Employers Must Do
- Identify the correct tax codes for all employees on the payroll by **6 April 2026**.([gov.uk](https://www.gov.uk/government/publications/p9x-tax-codes/p9x-tax-codes-to-use-from-6-april-2026?utm_source=openai))
- For employees **without a new code**, continue using the authorised code from 2025-26, avoiding “week 1” or “month 1” basis startings.([gov.uk](https://www.gov.uk/government/publications/p9x-tax-codes/p9x-tax-codes-to-use-from-6-april-2026?utm_source=openai))
- **New employees**: Use their P45 if provided. If not, follow standard PAYE start procedures. Manual payroll employers must follow RT7 guidance if exempt from online filing.([gov.uk](https://www.gov.uk/government/publications/p9x-tax-codes/p9x-tax-codes-to-use-from-6-april-2026?utm_source=openai))
## Example Scenarios
- *Example 1*: Jane has kept her 2025 padding code and is still in the same job—her employer will continue using that same code in 2026/27 with adjustments for normal deductions.
- *Example 2*: Liam moves job in April 2026 but fails to provide P45—his code starts with emergency prefix until proper code is assigned.
## Common Pitfalls
- **Using outdated tax codes** after April 6 leads to under- or over-withholding.
- Carrying “week-1/month-1” markers forward inadvertently.
- Not updating payroll software to reflect new thresholds—especially around PAYE earnings threshold or personal allowance.
- Failing to treat emergency codes correctly for new employees.
## Recap & Action List
- Review employee status ahead of April.
- Confirm tax software is up to date.
- Distribute guidance to payroll and HR teams.
- Ensure accurate P45/P60/P9(T) handling.
## In Summary
P9X for 2026/27 brings continuity in allowances but updated procedural rules that affect payroll preparations. Employers who stay ahead—validate codes, keep documentation, and ensure tools are updated—will avoid issues and ensure smooth compliance across the upcoming tax year.