Inheritance and estate planning help you decide how your property, money, and personal affairs will be managed during your lifetime and after your death. This guide explains what an estate plan includes, how to avoid common mistakes during estate planning, and why mental capacity plays an important role in making valid, legally binding decisions. Whether you’re writing a Will, preparing a Lasting Power of Attorney (LPA), or planning for future care needs, understanding the process ensures your estate is protected and distributed according to your wishes.
What Is Inheritance Planning, and Why Does It Matter?
Inheritance planning refers to the steps you take to organise what happens to your property, savings, investments, and personal belongings when you die. It also involves preparing for situations in which you may temporarily or permanently lose the ability to make important financial or welfare decisions.
A well-structured inheritance plan helps you:
- Decide who inherits your money, property, and possessions
- Reduce inheritance tax where appropriate
- Prevent disputes between family members
- Make financial and welfare decisions easier for your loved ones
- Ensure your wishes are respected even if you lose capacity later in life
Without a clear plan, your estate may fall under the rules of intestacy, which decide who inherits if you die without a valid Will. These rules rarely reflect personal wishes and can leave unmarried partners, children, carers, and close friends with no legal entitlements. A solid plan protects both your wishes and the people who rely on you.
If you’re new to this topic, you may want to read our companion guide on inheritance tax bands, which explains how tax thresholds affect the value passed to your beneficiaries.
What Are the Key Elements of a Good Estate Plan?
Estate planning covers far more than writing a Will. A complete plan brings together several legal, financial, and personal decisions. Below are the core components most people should consider.
Writing a Legally Valid Will
A Will is the foundation of your estate plan. It is a legally binding document that sets out:
- Who inherits your assets
- Who acts as executor
- How property, money, and personal items should be distributed
- Who cares for any minor children
- Whether you have any specific funeral or religious wishes
To write a valid Will in the UK, you must:
- Be aged 18 or over
- Make the decision voluntarily
- Understand what you own and who might reasonably expect to inherit
- Sign the Will in the presence of two witnesses
A clear and up-to-date Will also makes the probate process smoother, helping your executors administer the estate without unnecessary delays. Moreover, you should update or amend your Will after major life events, such as marriage, divorce, the birth of a child, or the purchase of new property. A Will can also be revoked entirely if your circumstances change.
If there is ever doubt about whether someone understands the implications of making a Will, solicitors may request a testamentary capacity assessment to ensure the decision is valid and legally sound.
Lasting Powers of Attorney (LPAs)
A Lasting Power of Attorney allows you to appoint someone you trust to make decisions if you lose the ability to do so. There are two types of LPAs:
- Property and Financial Affairs LPA covers money management, bills, property, pensions, and investments
- Health and Welfare LPA covers medical treatment, daily care, and living arrangements
Without a Lasting Power of Attorney, your family may need to apply to the Court of Protection for a deputyship order, which is often more time-consuming and expensive.
Creating an LPA while you still have capacity prevents confusion and protects your preferences if you develop dementia, experience a brain injury, or lose decision-making abilities for any reason.
If you’re preparing or reviewing LPAs, our LPA Assessments guide explains the exact capacity requirements.
Trusts and Protective Arrangements
Trusts can be used to manage assets for children, vulnerable adults, or family members who may not be ready to handle inheritance themselves. They may also form part of tax planning, especially for large estates or complex family structures.
Common types of trusts include:
- Bare trusts
- Discretionary trusts
- Life interest trusts
Trusts should be drafted with legal advice to ensure compliance with UK inheritance law and to achieve the intended protection.
Tax Planning and Financial Strategy
Inheritance tax (IHT) can significantly reduce the value of an estate, particularly for individuals who own property in areas with high house prices. An estate plan may include:
- Making permitted lifetime gifts
- Using the annual gift allowance or small gift exemptions
- Reviewing the value of property and investments
- Considering charitable donations
- Exploring business or agricultural relief
Structuring assets early in your estate planning can minimise inheritance tax liability and protect the inheritance left to beneficiaries.
For a deeper breakdown of tax thresholds, you can read our full guide on inheritance tax bands and allowances.
Planning for Loss of Capacity
No estate plan is complete without considering what happens if illness, accident, or age affects your decision-making ability. This may include:
- Setting up LPAs
- Using advance decisions or advance statements
- Communicating long-term care preferences
- Documenting financial and welfare wishes
The Mental Capacity Act 2005 sets out how decisions should be made for individuals who lack the capacity to decide for themselves. Planning early ensures your preferences are respected and helps avoid conflict between family members.
What Are Some Common Mistakes People Make in Inheritance Planning?
Many people assume inheritance planning is straightforward, but small oversights can quickly create challenges during probate. Knowing what tends to go wrong helps you build a plan that protects your assets and reduces uncertainty for those you care about. Below are the most frequent issues seen by solicitors, executors, and probate professionals.
Writing a Will without legal guidance
Homemade or online Wills often contain errors, unclear wording, or incorrect signing procedures. These issues can make the Will invalid or lead to disputes between beneficiaries.
A solicitor can help you ensure your Will reflects your wishes and complies with inheritance law in the UK. Solicitors also help streamline the probate process by ensuring documents are drafted correctly, reducing the risk of challenges later on.
Failing to update your Will or estate plan
A Will written 15 years ago may no longer reflect your circumstances. Common triggers for review include:
- Marriage or civil partnership
- Divorce or separation
- The birth or death of a family member
- Buying or selling property
- Changes in financial situation
Forgetting to update a Will is one of the most common and most avoidable estate planning mistakes. Regularly review your Will and keep it up to date.
Not considering the rules of intestacy
If you die without a valid Will, your estate is distributed according to the rules of intestacy. These rules prioritise spouses, civil partners, and biological children but exclude:
- Unmarried partners
- Stepchildren
- Friends
- Carers
- Charities
More importantly, the rules of intestacy may not regard your actual wishes. This can create major distress, especially in blended families or where long-term partners live together but are not legally married. Intestacy can also complicate the probate process, particularly when the estate includes property, business assets, or estranged family members.
Overlooking tax implications
Many people underestimate how inheritance tax bands affect their estate. Rising property values in the UK have pushed more estates into taxable thresholds, catching families off guard.
Simple planning, such as gifting or using allowance thresholds, can reduce exposure.
Forgetting to document lifetime gifts
Improperly recorded gifts can lead to disputes with HMRC, delays during probate, and unintended tax charges. Executors need evidence to apply exemptions correctly. Ensure you document any gifting activities thoroughly.
If you’re considering gifting as part of your strategy, our dedicated article on lifetime gifting and tax planning explains the seven-year rule and taper relief in detail. Or, if you want to understand the risks of gifting in more detail, our guide on when generosity becomes risky outlines how to protect vulnerable donors.
Ignoring concerns related to mental capacity
Estate planning decisions rely on the person’s ability to understand, retain, and weigh relevant information. If capacity is questionable, decisions such as writing a Will, making gifts, or signing an LPA can be challenged later.
Solicitors often request a testamentary capacity assessment or a capacity to gift assessment to confirm that a person understood their decisions at the time they made them.
How Does Capacity Affect Your Will and Long-Term Decisions?
The legal test for testamentary capacity comes from a well-established case: Banks v Goodfellow (1870). It requires the person writing a Will to:
- Understand the nature and effect of making a Will
- Understand the extent of their estate
- Consider those who may have a reasonable claim
- Retain and weigh key information, and communicate their decision
- Not be affected by mental illness that influences their decisions or undue pressure from others
This test is still used today, and professionals rely on it when deciding whether a capacity assessment is needed.
Here’s a practical example. Imagine Mr Thompson, aged 82, wants to amend his Will. He has early dementia, a complex family structure, and significant financial assets. Before proceeding, his solicitor may request a formal capacity assessment to confirm that he understands:
- The value of his property and money
- The people who might expect to inherit
- The changes he wishes to make
- The consequences of those changes
This assessment protects both Mr Thompson and his beneficiaries from future challenges.
What Happens If Someone Lacks Capacity to Manage Their Inheritance?
When an individual lacks the capacity to manage money or property, several safeguards apply:
- A Deputy may be appointed by the Court of Protection
- Their inheritance may be managed in a trust
- A property and financial affairs LPA may already be in place
- Significant decisions may require a COP3 capacity assessment
- Trustees or attorneys must act in the person’s best interests
If someone inherits money but cannot manage it safely, the Court of Protection may intervene to ensure the funds are used appropriately and protected from exploitation.
You can also read our in-depth guide on Court of Protection assessments, which explains the process and legal thresholds in more detail.
Why Do Solicitors Often Request Capacity Assessments Before Will-Making?
Solicitors frequently request capacity assessments in situations where:
- A person has dementia, a brain injury, or cognitive decline
- There are concerns about undue influence
- A large estate or complex family structure increases dispute risk
- A Will is being amended late in life
- Previous Wills and gifts have been contested
A capacity assessment provides independent, objective evidence that the testator understood their decisions. This reduces the likelihood of challenges, supports the probate process, and strengthens the validity of the Will.
Mental capacity assessors working at OFH Care can conduct capacity assessments for:
- Writing or amending a Will
- Capacity to make a gift
- Signing a Lasting Power of Attorney
- Court of Protection applications
These assessments can give people confidence that important decisions are made safely and in line with UK inheritance law.
Conclusion
Inheritance and estate planning are two of the most important steps you can take to protect your finances, your property, and the people you care about. By writing a valid Will, planning for loss of capacity, and preparing your affairs early, you give your loved ones clarity and security during what can be a difficult time.
If you need support with decisions involving mental capacity, OFH Care provides assessments for Wills, gifting, LPAs, and Court of Protection applications. These assessments ensure your choices are valid, safe, and fully aligned with UK inheritance law.