Check the £100k tax threshold before it quietly costs more.
If your adjusted net income goes over £100,000, your Personal Allowance can start to reduce. This checker helps PAYE earners understand the pressure point before tax planning becomes urgent.
Use it if your PAYE income is near or above £100,000.
The £100k threshold can catch people by surprise because the issue is not only higher-rate tax. The real pressure comes from losing some or all of the Personal Allowance.
Estimate your Personal Allowance pressure.
Enter employment income, bonus/benefits, other taxable income and possible planning deductions.
Your check
This checker is designed for England, Wales and Northern Ireland planning. It does not replace a full tax calculation, Self Assessment review or personal tax planning advice.
Your result
Based on adjusted net income of £110,000.
This checker uses 2026/27 planning assumptions. If adjusted net income exceeds £100,000, the Personal Allowance reduces by £1 for every £2 above the threshold and is fully removed at £125,140. The checker is a planning tool only and is not personal tax advice.
The £100k issue is the allowance taper
Once adjusted net income goes over £100,000, the tax-free Personal Allowance starts to reduce. That can create a much higher effective tax pressure on income within the taper band.
Planning before year-end matters
Pension contributions, Gift Aid donations and accurate income forecasting can sometimes help manage the position, but the right approach depends on your full circumstances.
Useful tax tools to try next.
Want a PAYE £100k tax checklist?
Use the checker for a quick estimate, then use a checklist to think through payslips, pension contributions, Gift Aid, Self Assessment and year-end planning.
Quick questions before using the checker.
Need help understanding your PAYE £100k position?
The checker gives a useful estimate. A proper conversation helps you understand what the numbers mean for your tax code, Self Assessment position, pension planning and year-end decisions.
Check the threshold, then understand the tax planning options.
Income over £100,000 can affect Personal Allowance, tax code, pension planning, Self Assessment and year-end decisions. Use this as a starting point before acting.