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How to help with a first home deposit in a tax-smart way

4 Jun 26 Emily Malone

Helping your kids and grandkids take the next exciting step forward in their lives is one of the most common wealth decisions we see.

It’s also one of the easiest to get wrong, from a tax standpoint.

You want to give someone you love a stronger start, more stability, and the chance to build a home of their own sooner. But helping with a first home deposit is still a financial decision like any other, with tax, affordability, long-term security, and family dynamics to think through. The good news is there are several thoughtful ways to do it well.

A cash gift may be the simplest route. In some cases, regular gifts from surplus income can be more efficient. In others, saving into an ISA or Lifetime ISA over time may be the better answer. The right route depends on timing, your wider estate, your cashflow, and whether this is a one-off act of support or part of a broader family wealth plan. HMRC’s inheritance tax rules, ISA guidance and Lifetime ISA guidance all shape how this works in practice.

Let’s break it down.

What’s the most tax-efficient way to help with a first home deposit?

There isn’t one single best answer.

But there are usually four routes worth looking at first:

making a cash gift
using your annual gifting exemptions
making regular gifts out of surplus income
helping them save into tax-efficient wrappers such as an ISA or Lifetime ISA

Which route works best depends on the size of the help, how soon the deposit is needed, and whether you’re solving only the deposit problem or making a wider family wealth decision at the same time.

We tackle that broader question in our blog post Should you gift wealth while living or leave it in your will?.

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Option 1: Make a cash gift

For many families, this is the cleanest route.

You give money outright. Your child or grandchild uses it towards their deposit. The mortgage lender will usually want confirmation that it’s a genuine gift rather than a loan, often through a gifted deposit declaration. It’s worth checking the lender’s requirements early, as most will want written confirmation that the money doesn’t need to be repaid.

From a tax perspective, the key issue is usually inheritance tax rather than income tax or capital gains tax.

A straightforward gift to an individual is typically a Potentially Exempt Transfer. That means if you survive seven years from the date of the gift, it’ll usually fall outside your estate for inheritance tax purposes. We explain how that works in more detail in PETs vs CLTs: What You Should Know About Lifetime Gifts And Inheritance Tax.

That doesn’t mean every large gift is automatically a good idea. It may be tax-efficient. But that only matters if the gift doesn’t weaken your own financial position in the process.

Helping with a deposit is often easy to justify emotionally. Rebuilding your own future options later is much harder.

Option 2: Use your annual gifting exemptions

HMRC allows you to give away up to £3,000 each tax year without it being added to the value of your estate for inheritance tax purposes. If you didn’t use last year’s exemption, you can usually carry it forward for one tax year only. That means some people can give up to £6,000 this year before using the current year’s exemption.

On its own, that won’t cover a full deposit. But it can still be useful.

It may form part of a wider family contribution. It may help with fees and moving costs. Or it may be one layer in a more gradual plan, where parents or grandparents support a deposit over more than one tax year rather than in one large transfer.

We touch on this in How couples without children can pass on wealth tax-free, and it also fits neatly into broader allowance planning. If you’re reviewing that more generally, our Tax year end planning checklist for the 2025/26 tax year is a useful place to start.

Option 3: Make regular gifts from income

This is one of the most underused routes.

HMRC has a separate inheritance tax exemption for gifts made out of normal expenditure from income, provided the gifts form part of your normal spending pattern, come from income rather than capital, and leave you with enough income to maintain your standard of living.

In practice, that means regular gifts can sometimes fall outside your estate immediately, rather than relying on the seven-year clock that applies to many lump-sum gifts.

This can be especially useful for parents or grandparents with strong surplus income. Instead of making one large gift from capital, they might fund monthly contributions towards house savings over several years, provided the pattern and affordability are properly evidenced. The catch is record-keeping.

This exemption is only as strong as your ability to prove it. If you want to use it properly, document the intention, the amounts, the dates, and the fact that the gifts came from surplus income.

We come back to that wider question in Should you gift wealth while living or leave it in your will?, especially where family support sits inside a broader estate plan.

Option 4: Use a Lifetime ISA if the timeline allows

If the person buying the home is eligible, a Lifetime ISA can be one of the most efficient ways to build a first home deposit over time.

You can pay in up to £4,000 a year, and the government adds a 25% bonus, up to £1,000 per year. The account can be used towards buying a first home worth up to £450,000, provided it’s been open for at least 12 months and the purchase is made with a conveyancer or solicitor. The rules are set out in the government’s Lifetime ISA guidance.

This won’t always be the right answer. If the purchase is close, the timing rules may get in the way. If the property is likely to exceed the Lifetime ISA purchase cap, it may not be suitable.

But where there’s time to plan, it can be a smart way to support a deposit without the money simply sitting in cash.

It also gives the support a bit more structure. And in some cases, that’s exactly what makes it work.

A simple example

Let’s say parents want to help their daughter buy her first home in two years’ time.

They could simply give her a lump sum now. That may be the right answer. But they might also decide to use some of their annual gifting exemptions, fund part of the support through regular gifts from surplus income, and encourage her to keep building within a Lifetime ISA if she’s eligible.

The family outcome is the same: more help with the deposit.

But the route there is more deliberate. It can reduce future inheritance tax exposure, make use of available allowances, and avoid turning a generous act into a rushed or poorly documented transfer.

That’s often where the value sits. Not in finding a clever trick, but in using the rules thoughtfully.

What should you think about before gifting?

Tax matters. But it shouldn’t be the only filter.

Before making a large gift, it’s worth asking:

Will this affect your own retirement security?
Do you need access to this money later?
Are you all treating family members fairly?
Is this a one-off gift or part of a wider gifting strategy?
Have you documented the gift clearly?
Does the recipient’s mortgage lender have any requirements about the source of funds?

These questions matter because the most tax-efficient route isn’t always the best real-life route.

Sometimes a parent can afford to gift the deposit easily. Sometimes they can help, but not as much as they’d like without creating pressure on themselves later. Sometimes a phased gifting plan makes more sense. Sometimes a different structure is worth exploring.

The tax answer is only one part of the decision.

What this strategy doesn’t do

Helping with a deposit in a tax-smart way doesn’t mean trying to optimise every last detail.

It doesn’t mean giving away money you may later need.

It doesn’t mean the cheapest tax route is automatically the best family route.

And it doesn’t mean every parent or grandparent should rush into gifting as early as possible.

Tax should support the plan. It shouldn’t become the plan.

Where we add value

The technical rules matter. But on their own, they don’t make the decision.

What matters is how those rules apply to your life:

how much you can genuinely afford to give, and when
whether regular gifting from income is realistic
whether a lump sum creates inheritance tax exposure
how this fits alongside retirement planning and estate planning
whether this forms part of a broader next-generation wealth conversation

That’s where joined-up advice becomes useful.

Our role is to help you support family in a way that feels thoughtful, sustainable and properly structured, so the decision works not just now, but later too.

The bottom line

Helping with a first home deposit is one of the most meaningful ways to use your wealth. It’s a chance to give the next generation security, confidence, and a stronger start at the moment it matters most. And with the right planning, that support can also make thoughtful use of the tax rules around gifting and savings.

But the right answer depends on more than what’s technically allowed. It depends on affordability, timing, record-keeping and how the gift fits into your wider plan. HMRC’s rules on annual gifting, seven-year PET treatment and normal expenditure out of income are the key foundations here.

That’s why this works best as part of a wider family wealth strategy, not as a standalone transaction.

Thinking about helping family with a deposit?

We can help you weigh up the tax position, the gifting options and what feels sustainable for your own long-term plan.

Get in touch

FAQs

Can I gift money to my child for a house deposit?

Yes. Many parents and grandparents do. Inheritance tax may still be relevant depending on the size of the gift and how long you live afterwards, but outright gifts to individuals are a common way to help with first home deposits. We explain the inheritance tax side of that in PETs vs CLTs: What You Should Know About Lifetime Gifts And Inheritance Tax.

Do I pay tax if I give my child money for a deposit?

Usually, the person receiving the cash gift won’t pay income tax simply because they’ve received it. The main tax consideration is often inheritance tax for the donor, depending on the exemptions used and whether the gift remains within the estate. HMRC’s IHT403 form notes are helpful here.

What is the seven-year rule for gifted money?

Many gifts to individuals become exempt from inheritance tax if the donor survives for seven years after making the gift. We cover that in PETs vs CLTs: What You Should Know About Lifetime Gifts And Inheritance Tax.

Can regular gifts from income be inheritance tax-free?

They can be, if they meet HMRC’s conditions for normal expenditure out of income. The gifts must form part of a normal pattern, come from income rather than capital, and leave you with enough income to maintain your standard of living.

Is a Lifetime ISA a good way to help with a first home deposit?

It can be, especially if there’s time to plan. A Lifetime ISA offers a 25% government bonus on up to £4,000 of contributions each year, subject to the product rules and first-home conditions set out in the government’s Lifetime ISA guidance.

Sources

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