The Bank of Mum and Dad: 8 Costly Mistakes to Avoid

In last month’s blog, we explored the Bank of Mum and Dad  -  the good, the bad and the potential pitfalls. We looked at how helping children or grandchildren financially can be incredibly positive when done properly, but also how easily things can go wrong without some planning.

Since then, we’ve had a number of conversations with families who recognised themselves in those scenarios.

Helping family financially is one of the most generous things parents can do. With rising house prices and tightening mortgage criteria, the Bank of Mum and Dad has become a familiar part of modern family life.

But in our experience, it is also one of the easiest ways for well-meaning families to fall into avoidable legal and tax traps.

Based on what we advise on, and see day to day, here are the top eight mistakes families make when supporting loved ones financially (and why they matter more than you might expect).

1. Assuming trust removes the need for paperwork

“We trust each other -  we don’t need anything formal.”

The difficulty is that trust doesn’t help when:

1. HMRC ask questions
2. relationships change
3. or an estate is being administered years later

Without clear documentation, money intended as a loan may be treated as a gift, or simply disputed.

Paperwork doesn’t denote mistrust. It provides clarity, protection and avoiding future conflict.

2. Treating a loan like a gift (or a gift like a loan)

This often sounds familiar: “It’s just a loan for now.” “We’ll sort it out later.”

Unfortunately, that uncertainty creates risk.

1. If it’s a loan, it needs proper terms
2. If it’s a gift, the inheritance tax position needs to be understood

Blurring the two can:

1. increase the taxable value of an estate
2. create disputes between beneficiaries
3. undermine wider estate planning

HMRC will look at what actually happened, not what was intended.

3. Falling into the gift with reservation of benefit trap

This commonly arises where property is involved.

For example:

1. gifting a home but continuing to live there
2. or not paying full market rent after the gift

In these situations, HMRC may treat the asset as still part of the estate for inheritance tax purposes.

In other words, the planning simply doesn’t work.

We regularly see this - often long after the decision was made.

4. Believing gifting a property will avoid care fees

This is one of the most persistent misconceptions.

“If I give my house away, it won’t be counted.”

In reality, local authorities can look at why an asset was transferred.

If they consider it to be a deliberate deprivation of assets, the property may still be taken into account for care fee assessments, even if ownership has changed.

Families can end up:

1. losing control of the property
2. without achieving the protection they expected

5. Forgetting inheritance tax altogether

Inheritance tax is often overlooked at the point of giving.

Common assumptions include:

1. “It will be outside my estate anyway”
2. “It won’t matter by the time it’s relevant”

In reality:

1. gifts may still fall within the estate
2. loans can increase estate value
3. informal arrangements can unravel careful planning

Done properly, family support can form part of a sensible inheritance tax strategy. Done informally, it can create unexpected liabilities.

6. Overlooking capital gains tax for the next generation

Inheritance tax gets the attention,  but capital gains tax (CGT) is often missed.

Where assets are given during lifetime:

1. there is no CGT uplift on death
2. CGT may arise when the recipient sells
3. the tax bill can be significantly higher than expected

We often see cases where a well-meaning gift creates a problem that could have been avoided entirely.

7. Assuming it can all be sorted out later in the Will

“We’ll balance things in the Will.”

Unfortunately, Wills don’t  always fully fix unclear lifetime arrangements.

By the time an estate is being administered:

1. intentions are harder to prove
2. beneficiaries may disagree
3. executors are left interpreting what was “meant”

Clarity during lifetime avoids difficulties later.

8. Leaving it too late to get advice

Unfortunately, it is not unusual to find that by the time we are asked to help:

1. money has already been transferred
2. documents are missing or unclear
3. options are more limited

Early advice, and action is therefore the only way of avoiding problems that are much harder (and more expensive) to fix later.

The common thread

All of these issues stem from the same underlying problem:

Good intentions without joined-up advice.

Helping family financially isn’t just about transferring money. It engages property law, tax, trusts and long-term planning.

That’s where things can quietly go wrong.

Final thought

Helping family should feel positive, not uncertain.

The Bank of Mum and Dad works best when:

1. expectations are clear
2. arrangements are documented
3. and future consequences are properly considered

If you’re thinking about helping a child or grandchild, a short conversation at the outset can make all the difference.

Thinking about helping family financially?

Before making decisions about gifting, loans or property, it is worth taking advice so everything is done properly from the start.

A small amount of planning now can avoid significant cost, stress and uncertainty later.