What happens if I earn over 125k?

What Happens If You Earn Over £125,000 in the UK?

Reaching an income over £125,000 is a milestone many work toward, but it comes with a significant tax consequence that’s often overlooked. The UK’s personal tax allowance—the amount you can earn before paying income tax—starts at £12,570. But here’s the catch: once you earn over £100,000, that allowance begins to disappear.

For every £2 you earn above £100,000, you lose £1 of your personal allowance. This means the tax-free amount shrinks faster as your income climbs. So, if you earn £120,000, your personal allowance drops to just £2,570. And if your income hits £125,140, it vanishes completely—meaning you’ll pay Income Tax on every single pound you earn.

This effectively creates a marginal tax rate of over 60% on the income between £100,000 and £125,140, which surprises many high earners. It’s not an additional tax band, but the gradual withdrawal of the allowance that makes it feel like one. National Insurance contributions still apply on top, though they taper off at higher earnings.

The impact is especially noticeable for freelancers, contractors, or professionals in high-paying industries like finance or tech. Many don’t realize how quickly the loss of the personal allowance can affect their take-home pay. Smart tax planning—such as pension contributions or using salary sacrifice schemes—can help mitigate some of these effects, especially if you're approaching or above the £100,000 threshold.

While earning over £125,000 reflects financial success, it also brings greater tax responsibilities. Understanding how the personal allowance phases out ensures you’re not caught off guard by a larger-than-expected tax bill.