Inheritance disputes in the UK are rising sharply, and poor estate administration is behind many of them. When the probate process is handled carelessly, with documents mismanaged, beneficiaries left in the dark, or assets distributed without proper legal authority, the damage can turn into costly litigation. Families who get professional probate assistance early are in a much better position to avoid the kinds of disputes now reaching the courts in record numbers.
The scale of the problem is growing. More than 1,200 disputed probate cases were filed at the High Court in 2025, according to data from legal analytics platform Solomonic, an increase of 13% year on year. Since 2019, contentious probate disputes have risen by 56%. Behind each number is a family that has broken apart over someone’s estate.
What is driving the increase?
Several factors are pushing up the number of inheritance disputes, and most of them show no sign of easing.
Rising property values. Across the UK, property values have increased substantially over the past two decades. When a family home forms the bulk of an estate, and in many parts of England it does, the sums involved make litigation more financially viable. A dispute over £50,000 might not be worth pursuing in court. A dispute over £500,000 often is.
The complexity of modern families. Blended families involving stepchildren, children from previous relationships, and new partners are increasingly common. The intestacy rules, and even carefully drafted wills, can struggle to deal with these situations, leaving multiple parties unhappy with the result.
Challenges to testamentary capacity. As the UK’s population ages and dementia becomes more common, more wills are being challenged on the basis that the deceased lacked the mental capacity to make them. In 2023, will challenge claims at the High Court stood at 122, up from 77 in 2016.
DIY or poorly drafted wills. The growth of online will-writing services has produced many wills that are technically valid but badly thought through, unclear in their terms, or missing provisions for specific circumstances. These documents often become the subject of disputes.
Claims under the Inheritance (Provision for Family and Dependants) Act 1975. More people, including adult children, cohabiting partners, and financial dependants, are bringing claims under the 1975 Act arguing that a will or the intestacy rules fail to make reasonable financial provision for them. These claims have grown steadily year on year.
How disputes most commonly arise
Research published by legal practices in 2024 indicates that 33.6% of inheritance disputes stem from perceived legal unfairness in how the estate was divided, while 31.3% involve direct legal challenges to the validity or terms of a will. Trust disputes account for a further 22.4% of cases.
This shows that most disputes are not random outbursts of family conflict. They come from predictable situations: unclear estate planning, poor communication, lack of professional oversight, and beneficiaries who feel shut out of the process.
An executor who fails to communicate with beneficiaries, delays distribution without explanation, or makes decisions that appear self-interested will often trigger complaints that grow into formal disputes. A disagreement over a few thousand pounds can end in legal costs running into tens of thousands.
The role of probate in dispute prevention
One of the most effective tools for preventing inheritance disputes is a well-run probate process. When the estate is administered properly, with clear records, proper valuations, timely HMRC filings, and open communication with beneficiaries, there is far less room for suspicion, resentment, or legal challenge.
In practice, this means:
- keeping beneficiaries informed at each stage of the administration
- getting professional property and asset valuations to reduce the risk of later claims of undervaluation
- paying creditors and outstanding debts in the correct order before making any distributions
- completing and submitting HMRC inheritance tax forms accurately and on time
- keeping financial accounts that can be shared with all parties
Professional estate administrators can also play a neutral role in families where tensions already exist. A third party acting in the interests of the estate, rather than any one beneficiary, can reduce mistrust and stop minor disagreements from hardening into formal disputes.
What to do if a dispute is already developing
If tensions are building within your family over an estate, early intervention is usually more effective and less expensive than waiting for matters to get worse. Mediation between beneficiaries, led by an independent professional, resolves many estate disputes without court proceedings.
Where a will is being challenged on grounds such as lack of capacity, undue influence, or failure to meet legal formality requirements, specialist legal advice is needed quickly. There are strict time limits on some estate claims, and delay can damage a valid case.
What you can do now
For those who have not yet made a will, or whose existing will was drafted years ago without professional review, the time to act is before a dispute starts. A properly structured will, clearly written and regularly reviewed, is the strongest preventive tool available.
For executors already administering an estate, the main priority is to manage the process openly, keep accurate records, and seek professional support when the estate is complex or family relationships are strained. The cost of professional probate management is often a fraction of the cost of litigation, and the damage to family relationships can be far greater than the legal bill.