For many professionals, earning six figures once felt like a major financial milestone. But increasingly, people crossing the £100,000 income mark are finding themselves asking the same question:
“Why doesn’t it actually feel like I’m taking home that much more?”
The answer often comes down to something many people don’t realise exists until they’re already caught by it: the £100k tax trap.
Thanks to frozen tax thresholds, salary inflation and larger bonuses in some sectors, more people are drifting into it without fully realising the impact.
What Actually Is the £100k Tax Trap?
Once your income goes above £100,000, you begin to lose your personal allowance, which is the amount of income you can earn before paying tax.
For every £2 earned over £100,000, £1 of your personal allowance is removed, and by the time income reaches £125,140, the allowance disappears entirely.
The result is an effective tax rate that often catches people off guard.
For many people, a pay rise, bonus or additional income suddenly creates far less extra take-home pay than expected. In some cases, it can even affect things like childcare support and other allowances, too.
That’s why many professionals are finding themselves earning more on paper, while wondering why their monthly finances don’t feel significantly different.
Why More People Are Being Affected
One of the biggest reasons this issue is becoming more common is something called fiscal drag. In simple terms, tax thresholds have remained frozen while wages have gradually increased.
A few years ago, earning over £100,000 may have felt relatively unusual. Today, more professionals in sectors like finance, law, technology, healthcare, and business ownership are crossing that threshold through normal career progression rather than dramatic wealth increases.
The problem is that many people still associate “higher earners” with lifestyles far wealthier than their own.
In reality, someone earning just over £100,000 while managing a mortgage, childcare costs, pension contributions and rising household expenses may not feel particularly wealthy at all.
That’s part of what makes the tax trap so frustrating. It often catches people during years when financial commitments are already at their highest.
Why Planning Matters More Than Ever
The good news is that falling into the £100k tax trap doesn’t automatically mean you’re stuck with it. For many professionals, proactive financial planning can significantly reduce the impact.
This is where areas such as pension contributions, salary sacrifice arrangements, bonus planning and tax-efficient structuring can be particularly valuable.
Often, small adjustments can make a meaningful difference, especially when coordinated properly alongside longer-term retirement and investment planning.
The key is recognising the issue early rather than discovering it after the tax year has already passed.
It’s Not Just About Tax
Interestingly, the conversation around the £100k threshold is rarely just about tax itself. For many people, it becomes a wider financial planning moment.
Questions start appearing around whether they’re contributing enough to pensions, whether bonuses are being structured efficiently, whether their investments are aligned properly, and whether they’re making the most of the allowances and planning opportunities available to them.
In that sense, the £100k tax trap often highlights something bigger: the point at which finances become more complex and benefit from more joined-up planning.
Why Proactive Planning Matters More Than Ever
Crossing six figures should feel like progress, not confusion.
But as tax rules become more complex and thresholds remain frozen, more professionals are discovering that higher earnings don’t always translate into significantly higher take-home income.
That’s why proactive planning is becoming increasingly important in 2026, particularly for professionals whose income is creeping into higher tax bands without them fully realising the consequences.
If you’d like to review your current financial position and understand whether you could be affected by the £100k tax trap, our team is here to help.
📞 Call 020 8366 4400 or 📧 email enquiries@cedarhfs.co.uk to see how we can help you out.