More families are choosing to handle probate themselves. Online guidance, government digital services, and the wish to keep legal costs down have made DIY probate easier to access than before. For some simple estates, it is manageable. But for many families, doing it alone ends up costing more in money, time, and stress than getting a professional involved from the start. Understanding what probate assistance involves, compared with what DIY probate requires, is the first step in making a sound decision.
The appeal makes sense. From the outside, probate can look like paperwork: forms to complete, accounts to close, assets to distribute. The reality is more demanding.
What DIY probate actually involves
Probate, or where there is no will, obtaining letters of administration, is a legal process governed by rules, procedural requirements, and statutory deadlines. An executor handling probate themselves is expected to:
- locate and authenticate the original will
- value every asset and liability in the estate as at the date of death
- submit the correct HMRC inheritance tax forms, IHT205 for simpler estates and IHT400 for complex ones or where tax is due
- pay any inheritance tax due within six months of the end of the month of death
- apply to the probate registry for a grant of probate
- notify all creditors and settle outstanding debts in the correct order
- collect in assets, transfer or sell property, and distribute the estate
Each of these steps requires legal and tax knowledge. A mistake at any stage can have consequences.
The mistakes people most commonly make
Incorrect estate valuations. HMRC expects estates to be valued accurately at the date of death. Undervaluing an estate, even by accident, can trigger an investigation, penalties, and interest on underpaid tax. Overvaluing assets can also cause problems, as it may create unnecessary tax liabilities. Professional valuations, particularly for property and business assets, are strongly recommended.
Missing the inheritance tax deadline. Inheritance tax must be paid within six months of the end of the month in which the death occurred. Interest starts from that point. Executors who do not know this deadline, or assume they can wait until probate is granted before paying, often face avoidable interest charges.
Failing to identify all assets and debts. Overlooking an asset, such as an old pension, a dormant bank account, or shares held with a forgotten broker, means the estate is administered incorrectly. Distributing assets before all debts and liabilities are settled can leave the executor personally responsible for the shortfall.
Not applying for the correct form of grant. There are several types of grant of representation, and applying for the wrong one causes delay and extra cost. An executor who has lost capacity, who renounces, or who has died creates further complications that need specialist handling.
Distributing assets too early. Distributing the estate before HMRC has confirmed there are no further inheritance tax liabilities, or before the creditor notification period has closed, is one of the most serious and common errors in DIY probate. If a creditor later comes forward and the estate has already been distributed, the executor may need to cover the shortfall personally.
The real costs of getting it wrong
The court application fee for probate is £300, plus £16 per certified copy of the grant. These fees are fixed and unavoidable. But they are only a small part of what probate can cost when things go wrong.
Professional probate fees, when a firm is involved from the start, typically range from £2,000 to £10,000 plus VAT, depending on the complexity of the estate. A simple probate with no inheritance tax and straightforward assets might cost £3,000 to £4,000. A more complex estate involving property, inheritance tax, and multiple beneficiaries could cost £8,000 to £12,000 or more.
Those costs look different when set against the mistakes DIY probate can produce: HMRC penalties and interest on late or incorrect tax payments, solicitor fees to correct errors already made, compensation to beneficiaries who have suffered financial loss, and litigation costs if a dispute follows poor administration. In contested cases, legal costs can run into tens of thousands of pounds, often paid from the estate.
Personal liability: the risk most people overlook
Every executor should know one fact above all others: executors are personally liable for mistakes made during the administration of an estate.
If an asset is distributed to the wrong person, if a debt is missed, if inheritance tax is miscalculated, or if assets are distributed before HMRC clearance is obtained, the executor can be held responsible and required to make good any loss from their own funds. This is a legal reality that appears in court cases every year.
When DIY probate makes sense, and when it does not
For a genuinely simple estate, such as modest savings in one or two accounts, no property, no inheritance tax, a clear will, and cooperative beneficiaries, DIY probate may be workable.
For anything more complex, professional support is a form of risk management. The executor’s role carries real responsibility, fixed deadlines, and legal consequences. Families who go to professionals after trying to handle probate themselves often find that fixing mistakes costs more than getting help from the beginning.