£100k Abatement
Earning more than £100,000 a year in the UK brings significant financial implications due to the way Income Tax rules are structured. One of the most critical aspects to understand is the gradual loss of the personal allowance. The personal allowance, which is the portion of income that individuals can earn tax-free, begins to reduce once your adjusted net income (ANI) exceeds £100,000. For every £2 of income above this threshold, the personal allowance is reduced by £1. This creates a steep marginal tax rate and poses unique challenges for high earners.
This guide explores strategies to mitigate the financial impact of earning above £100,000, discusses how it affects childcare benefits, explains the so-called 60% tax trap, and outlines other important considerations for managing your finances effectively.
What is the Personal Allowance?
The personal allowance is the amount of income an individual can earn tax-free. For the 2024/2025 tax year, this allowance is set at £12,570. It is designed to benefit all taxpayers by reducing their taxable income. However, for individuals with adjusted net income exceeding £100,000, this allowance starts to taper off.
Adjusted net income includes all taxable income sources, such as salary, bonuses, dividends, and rental income, after deducting allowable reliefs like pension contributions and charitable donations.
How does the £100k abatement work?
When your adjusted net income surpasses £100,000, your personal allowance is reduced by £1 for every £2 over this threshold. This means that as your income increases within this range, you gradually lose the tax-free portion of your income.
By the time income reaches £125,140, the personal allowance is completely eliminated. This reduction means that every additional £2 of income between £100,000 and £125,140 is taxed not only at the higher rate of 40% but also carries an implicit 20% penalty from the lost allowance. Effectively, this creates a marginal tax rate of 60% on income within this band.
The 60% marginal trap
The so-called “60% tax trap” is one of the most insidious consequences of the £100,000 personal allowance abatement. The trap arises because the combined effect of losing £1 of personal allowance for every £2 of income, along with the 40% higher-rate tax, results in an effective marginal tax rate of 60% on income between £100,000 and £125,140.
- For every £1 earned over £100,000, you lose £0.50 of the personal allowance.
- That £0.50 is taxed at 40% under the higher rate of Income Tax.
- Combined with the standard 40% rate on income over £100,000, the effective rate becomes 60%.
This marginal rate can significantly erode income gains and serves as a financial disincentive for earning within this range. For individuals approaching or exceeding £100,000, careful planning is essential to minimise the impact of this high effective tax rate.
Impact on childcare benefits
The childcare benefits landscape in the UK is significantly influenced by the £100,000 income threshold. Two key schemes, childcare vouchers (now closed to new entrants) and Tax-Free Childcare, offer tax-efficient support to families, but eligibility for these benefits changes as income increases.
£? Childcare Vouchers
Childcare vouchers, available only to parents who joined the scheme before October 2018, allow salary sacrifice arrangements to fund childcare costs up to a certain limit. The savings from this scheme vary based on tax band but are generally more beneficial for higher-rate taxpayers.
£? Tax-Free Childcare
For new applicants, the Tax-Free Childcare scheme offers government support, contributing up to £2,000 per child annually. However, individuals or households where one parent earns over £100,000 lose eligibility for this benefit. This can create a financial cliff edge, especially for dual-income households where one parent’s earnings slightly exceed the threshold.
To mitigate this impact, some parents may consider using salary sacrifice arrangements to reduce ANI below the £100,000 threshold, thereby regaining eligibility. However, it is essential to weigh the benefits of such adjustments against other financial priorities.
Strategies to mitigate the impact
There are very few effective strategies that reduce the impact of the £100,000 personal allowance abatement:
£? Pension Contributions
Pension contributions reduce adjusted net income, potentially restoring lost personal allowance. For example, if your income is £110,000, contributing £10,000 to a pension could bring your income back down to £100,000, preserving the full personal allowance and saving significant tax. Additionally, pension contributions benefit from tax relief at your marginal rate, making them a doubly effective strategy.
This is the only strategy that has any material impact.
£? Gift Aid Donations
Charitable donations made under Gift Aid extend the basic tax rate band and reduce adjusted net income. This strategy can help to offset income above the £100,000 threshold while supporting worthwhile causes.
£? Defer Income
If you have control over when income is received, consider deferring payments into a future tax year where your income may be lower. This is particularly relevant for contractors or business owners who can adjust their remuneration schedules.
£? Tax-Efficient Investments
Investing in ISAs or similar tax-efficient vehicles allows for growth and income generation outside the scope of Income Tax. This strategy ensures that additional wealth does not contribute to your adjusted net income.
Long-term financial planning
Beyond immediate tax efficiency, the abatement emphasises the importance of holistic financial planning. High earners should consider working with financial advisers or tax specialists to develop strategies tailored to their circumstances.
For example, splitting income with a spouse or civil partner through shared assets or dividends may reduce individual taxable income, ensuring that neither party exceeds the £100,000 threshold.
Additionally, those nearing retirement should weigh the benefits of maximising pension contributions, particularly given the current £60,000 annual allowance for most individuals. Proper planning ensures that surplus income is effectively allocated without unnecessarily increasing tax liabilities.
Conclusion
The £100,000 personal allowance abatement is a significant tax trap for high earners in the UK, imposing an effective 60% marginal tax rate on income between £100,000 and £125,140. Understanding how the abatement works and implementing strategies to mitigate its impact is crucial for preserving income and minimising tax burdens.
By increasing pension contributions, utilising Gift Aid, deferring income, or leveraging salary sacrifice schemes, individuals can effectively manage their adjusted net income to maximise tax efficiency. However, given the complexities of the UK tax system, consulting with a qualified financial adviser or tax professional is highly recommended to ensure optimal outcomes.