As of April 2026, several key changes to inheritance tax (IHT) have come into force, affecting how families approach their long-term financial security. While some thresholds have remained static for years, new caps on specific reliefs mean that even those with relatively straightforward affairs are finding themselves closer to the tax net than they expected.
In areas like Kensington and Chelsea, where property prices have consistently outpaced national averages, the fiscal drag of frozen tax bands is becoming more apparent. Many homeowners who previously didn’t consider themselves particularly wealthy now find that the value of their family home alone exceeds the available tax-free allowances.
This trend is driving a surge in people looking to update their wills and ensure their plans reflect the current reality of the 2026 tax regime.
The New Cap on Business Property Relief
One of the most talked-about updates this year is the introduction of a new cap on Business Property Relief (BPR). Since April 2026, a £2.5 million limit applies to the 100% relief that was previously unlimited for qualifying business assets. This change means that for larger family businesses or substantial unquoted shareholdings, any value exceeding this threshold will now attract a 20% effective tax rate.
For married couples and civil partners, this allowance is transferable, effectively allowing a combined £5 million of business assets to be passed on tax-free. However, for those with successful enterprises in West London, this cap is a significant departure from the old rules. It’s no longer enough to assume a business will pass to the next generation without a tax bill, making it necessary to restructure holdings or reconsider gifting strategies well in advance.
Rising Property Values and Frozen Bands
The standard nil-rate band has been frozen at £325,000 since 2009 and will remain at this level until at least April 2030, along with the residence nil-rate band of £175,000. When you combine these, a couple can potentially pass on £1 million tax-free, provided their main residence is left to direct descendants. However, in Kensington and Chelsea, the average property value often dwarfs these figures, leaving a substantial portion of the estate liable for the standard 40% IHT rate.
Because property values in prime London locations continue to climb while the thresholds stay still, more families are being pulled into the IHT bracket. It is worth pointing out that even if you’ve lived in your home for decades, the paper wealth generated by house price growth can create a massive tax liability for your heirs.
This has made the role of professional wealth managers more prominent, as they help families model different scenarios to understand how these frozen bands will affect their specific situation.
Strategic Planning for the Future
To manage the impact of these changes, many individuals are looking at more than just a simple will. Planning now often involves a mix of lifetime gifting, the use of trusts, and ensuring that all available allowances are being utilised effectively.
The changes are particularly notable for holders of AIM-listed shares, which have been moved to a flat 50% relief rate from April 2026, resulting in an effective 20% IHT charge. Unlike private company shares and agricultural assets, AIM shares do not benefit from the £2.5 million 100% relief allowance at all, making them a less effective IHT planning tool than they once were.
When looking at your options, you might consider some of the following steps to protect your estate:
- Reviewing your will to ensure it accounts for the £2.5 million BPR cap if you own a business.
- Utilising annual gifting exemptions to reduce the overall value of your taxable estate over time.
- Checking your eligibility for the residence nil-rate band, especially if your total estate value exceeds £2 million.
- Exploring life insurance policies written in trust to cover potential IHT bills without increasing the estate’s value.
Final Thoughts
The reforms introduced in April 2026 have fundamentally changed the rules of the game for many families in West London. Between the new limits on business reliefs and the ongoing freeze on personal allowances, the need for proactive estate planning has never been clearer. Taking the time to review your will and financial structure now can prevent a significant and unexpected tax burden for your loved ones later.
The value of your investments and the income from them may go down as well as up, and you could get back less than you invested. Past performance should not be seen as an indication of future performance.
