Not all UK state benefits are tax-free. Being aware of which benefits are taxable can help you manage your finances effectively and avoid unexpected tax liabilities.
Taxable State Benefits
According to HMRC, the following benefits are subject to Income Tax:
• State Pension
• Carer’s Allowance
• Jobseeker’s Allowance (JSA)
• Contribution-based Employment and Support Allowance (ESA)
• Incapacity Benefit (after the 28th week)
• Bereavement Allowance (formerly Widow’s Pension)
• Widowed Parent’s Allowance
• Pensions from the Industrial Death Benefit scheme 
Reference: HMRC – Tax-free and taxable state benefits
Non-Taxable State Benefits
The following benefits are generally exempt from Income Tax:
• Universal Credit
• Personal Independence Payment (PIP)
• Disability Living Allowance (DLA)
• Maternity Allowance
• Attendance Allowance
• Bereavement Support Payment
• Housing Benefit
• Pension Credit
• Winter Fuel Payments & Christmas Bonus
• Child Benefit (Note: may be subject to the High Income Child Benefit Charge if your income exceeds £60,000)  
Reference: HMRC – Tax-free and taxable state benefits
Understanding the tax implications of these benefits ensures compliance with HMRC regulations and aids in accurate financial planning.