Compliance
Navigating PAYE Tax Codes for the 2026–27 UK Tax Year: What Employers Must Know
As the 6 April 2026 tax year approaches, UK employers need to update PAYE tax codes, personal allowance thresholds, and carryover procedures—failure to comply may lead to inaccurate withholdings and penalties.
By NomadicTax Research Team • 5-8 min read • April 9, 2026
## Introduction
Starting **6 April 2026**, several key changes under the PAYE (Pay As You Earn) regime will take effect in the UK. Employers need to update tax codes, understand new thresholds, and implement procedures to ensure compliance.
## What’s Changing
- The **basic Personal Allowance** is set at **£12,570** for the 2026–27 tax year. ([gov.uk](https://www.gov.uk/government/publications/p9x-tax-codes/p9x-tax-codes-to-use-from-6-april-2026?utm_source=openai))\,
- Weekly and monthly thresholds to trigger PAYE are **£242 per week** or **£1,048 per month**. ([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 tax code** for all employees will be **1257L**. ([gov.uk](https://www.gov.uk/government/publications/p9x-tax-codes/p9x-tax-codes-to-use-from-6-april-2026?utm_source=openai))
## Action Items for Employers
1. **Review employee tax codes**: For those with new tax code notices (e.g., via form P9(T) or online), ensure they are applied before 6 April. ([gov.uk](https://www.gov.uk/government/publications/p9x-tax-codes/p9x-tax-codes-to-use-from-6-april-2026?utm_source=openai))
2. **Carry over existing tax codes**: If no new code has been issued, continue using the most recent authorised tax code from 2025–26—while **avoiding ‘week 1’ or ‘month 1’ markings**. ([gov.uk](https://www.gov.uk/government/publications/p9x-tax-codes/p9x-tax-codes-to-use-from-6-april-2026?utm_source=openai))
3. **Handle leavers**: Employees leaving before 6 April still use their existing tax code—even if they receive pay after that date—unless a P45 has been issued; then use codes **0T, S0T or C0T** non-cumulatively. ([gov.uk](https://www.gov.uk/government/publications/p9x-tax-codes/p9x-tax-codes-to-use-from-6-april-2026?utm_source=openai))
4. **Prepare new joiners**: For those starting between **6 April and 24 May** who provide a P45, follow the “Tell HMRC about a new employee” guidance. Manual payroll users must continue using the applicable tax tables. ([gov.uk](https://www.gov.uk/government/publications/p9x-tax-codes/p9x-tax-codes-to-use-from-6-april-2026?utm_source=openai))
## Consequences of Non-Compliance
- **Under-deduction** of income tax: employees may face large liabilities when filing.
- **Over-deduction**: loss of cash flow and potential employee dissatisfaction.
- **Penalties**: HMRC can impose penalties for incorrect reporting or failure to update records.
## Practical Example
*If an employer forgets to use the new emergency code **1257L** for an employee who moves from Scotland to England before 6 April,* that employee may be taxed under a Scottish prefix incorrectly, leading to wrong tax band deductions.
## Recommendations
- Update payroll systems well before **April start** of the new tax year.
- Use HMRC’s **Basic PAYE Tools (BPT)** or compatible software that reflects **P9X guidance**. ([gov.uk](https://www.gov.uk/government/publications/p9x-tax-codes/p9x-tax-codes-to-use-from-6-april-2026?utm_source=openai))
- Perform internal payroll audits early to catch miscodings.
- Communicate with employees about how their tax code changes (if any) affect take-home pay.
**Summary**: Employers should now ensure their payrolls are updated in line with the new tax codes and thresholds from 6 April 2026. Proper preparation avoids costly mistakes and keeps both employer and employees compliant.