Leaving Children Unequal Shares of Your Estate: Fair or a Recipe for Dispute?

There is no requirement to leave children equal shares of an estate. For some families, an unequal division may feel fairer, particularly where one child has already received substantial financial support.

The difficulty is often not the split itself, but the reasoning behind it. If one child receives significantly less without understanding why, or the decision comes as a surprise after a parent’s death, questions can follow. The more useful issue is how that decision fits into the wider estate plan.

How lifetime gifts can affect an unequal inheritance

Lifetime gifts are one of the most common reasons a parent may decide against an equal split. A parent might have given one child £100,000 towards a house deposit and later decide that another child should receive more from the estate. From their perspective, they may simply be balancing the support each child has received.

Years later however, the intention behind that gift may be less clear. One child may regard it as unconditional, while another may believe it was always meant to be taken into account.

If previous financial support is influencing how an estate will be divided, it is worth discussing that when the Will is prepared and keeping a clear record.

Should you record why children are being treated differently?

Where an unequal division is deliberate, recording why the decision has been made can be valuable. A solicitor may recommend a detailed file note or a separate letter of wishes alongside the Will. This can provide useful context without trying to include every family circumstance within the Will itself. It will not prevent somebody from questioning the estate or bringing a claim, but it can help show that the decision was considered.

Can an unequal inheritance be challenged?

Treating children differently does not, by itself, make a Will invalid. Children are among those who may be able to bring a claim under the Inheritance (Provision for Family and Dependants) Act 1975 if reasonable financial provision for them has not been made. Whether a claim succeeds depends on the individual circumstances, not simply on the percentages inherited. An unexpected change can also prompt questions about capacity or undue influence.

When should you review a Will?

A decision that feels fair today may not produce the same result ten years from now. Financial circumstances change, relationships develop and the estate itself may look very different.

Where a Will deliberately treats children differently, reviewing it periodically gives the person making it an opportunity to consider whether the reasoning still stands and whether the outcome remains the one they want.

Equal does not always mean fair, and unequal does not automatically mean unfair. What matters is that the decision reflects the individual’s circumstances and intentions, with enough context to reduce unnecessary uncertainty later.

MLP Law’s Private Client team can advise on Wills and estate planning. Where a disagreement has already arisen following a death, our Dispute Resolution team can also advise executors and beneficiaries on inheritance disputes.