Your Parents Think £1 Million Is Tax-Free. It Probably Isn't.

There's a number that's lodged itself in the British financial consciousness, and it's quietly causing problems.

£1 million. That's the figure most people think a couple can pass on free of inheritance tax. It comes up at dinner parties. It comes up when people are reassuring themselves about their parents' finances. It comes up in newspaper headlines.

It's also, for a significant chunk of the people relying on it, not actually their allowance. The number is real. The conditions to get it are real too — and people skip over those.

This is a small but very useful thing to understand, partly for yourself eventually, but mostly for the conversation with your parents that's increasingly worth having.

Where the £1m comes from

The maths is simple enough.

Every person in the UK gets a nil-rate band of £325,000. That's the amount you can pass on free of inheritance tax. Above it, the rate is 40%.

On top of that, there's a residence nil-rate band of £175,000 — an extra allowance for passing your main home to your children or grandchildren.

Add those up: £500,000 each. Times two for a couple: £1m. Hence the headline.

But that £1m is the maximum a couple can pass on tax-free. It's not the default. It's a conditional ceiling, and the conditions are doing a lot of work that nobody talks about.

The conditions nobody tells you about

There are four big ways the £1m allowance silently fails to apply.

1. You have to be married or in a civil partnership. The "transfer your unused allowance to your spouse" rule, which is what doubles the £325,000 to £650,000, doesn't apply to unmarried couples — no matter how long they've been together. Cohabiting partners are, for IHT purposes, legal strangers. So the £1m number assumes a marriage that not every couple has.

2. You have to have children. Or grandchildren. Or stepchildren, adopted children, or fostered children. The residence nil-rate band — the £175,000-per-person bit — only kicks in if you're passing your home to a direct descendant. No descendants, no extra allowance. A couple with no kids drops from a £1m ceiling to £650,000. That £350,000 gap, taxed at 40%, is £140,000.

3. Your estate has to be under £2m. Once a couple's estate goes over £2m total, the residence nil-rate band starts being clawed back — £1 of allowance lost for every £2 the estate is over the threshold. By £2.7m, the residence allowance is gone entirely. Given current property prices, this is much easier to hit than people realise. A paid-off house in London or the South East plus a couple of decent pensions and an ISA gets there without anyone feeling rich.

4. The home has to actually go to descendants in the will. Not via a trust that doesn't qualify. Not split awkwardly with a partner who isn't a parent of the children. The technical requirements aren't difficult to meet, but they require the will to be set up correctly. A lot of older wills aren't.

If any of these conditions don't apply, the £1m figure is fiction. And in plenty of cases, more than one of them doesn't apply.

Why this is going to get worse before it gets better

There's a complication coming.

From April 2027, unused pension pots fall inside the inheritance tax net for the first time. For decades, pensions have been outside it — which means leaving the pension untouched and drawing down other assets first has been the most tax-efficient way to pass wealth down.

That changes. And it means a lot of estates that previously sat just under the £2m threshold (where the residence allowance starts tapering away) will, overnight, be over it — because suddenly the pension counts. Couples who previously assumed they had the full £1m allowance may find that, as soon as the pension gets added in, they've lost some or all of the residence portion.

This is the bit that hasn't sunk in for most people. The April 2027 change isn't just "pensions will be taxed." It's "your whole estate now looks bigger to HMRC, and other allowances start eroding as a result."

What this means for the conversation with your parents

If your parents are in their fifties or sixties and have ever said anything along the lines of "we're fine, we're under the million," it's worth a gentle five-minute check.

Not "explain your finances to me." Just:

• Are you married? If they're not — long-term unmarried partners are common in this age group — the £1m number was never going to apply.
• Is your house going to a direct descendant? This nearly always means children or grandchildren. If the will is leaving the home to anyone else — a sibling, a friend, a charity — the residence allowance doesn't help.
• Roughly, what's the total estate worth, including the pensions? If the rough answer is "north of £2m once you count everything," they're already in tapering territory and probably have been for a while without knowing.
• When was the will last updated? This is the one that catches people. A will written in 2010 may have been drafted before the residence nil-rate band even existed (it was introduced in 2017) and may inadvertently structure things in a way that prevents it being claimed at all.

None of these are advice questions. They're prompt questions. The answers either reassure everyone, or they tell you where the gaps probably are.

A small thing about gifting

One of the things that comes up in any conversation about IHT planning is gifting — giving money away during your lifetime so it doesn't count as part of your estate.

The headline rule is the seven-year rule. Gifts you make are exempt from inheritance tax if you live for seven years after making them. Die within seven years, and the gifts get pulled back into your estate on a sliding scale.

This is mentioned a lot, but the implications are usually understated. The seven-year clock only works if there's seven years for it to work in. Starting at 65 gives you very different planning options to starting at 80. For families where there's plenty of wealth and plenty of time, the simple act of starting to gift earlier rather than later is one of the highest-leverage things to do.

There's also a less-known rule about "gifts out of surplus income" — regular gifts made out of income you're not spending, which can be IHT-exempt immediately rather than waiting seven years. It requires good record-keeping and a clear pattern. For parents with healthy pensions and lower spending in retirement, it's a quietly powerful tool that not many people use.

Both of these are conversations for them to have with a financial planner, not with you. But if they haven't had the conversation at all, that's the gap.

What this means for you, eventually

The £1m number is going to be relevant to you one day, probably twice — once when you inherit (or don't), and once when you start thinking about your own estate.

The unhelpful truth is that the rules will almost certainly look different by then. Frozen thresholds get unfrozen, reliefs get redrawn, governments change. What's worth knowing now isn't the specific numbers — those will move — but the principle: that any headline tax-free allowance comes with conditions, and the conditions usually matter more than the headline.

"We're under the million" is one of those phrases that sounds like a fact and is actually an assumption.

How LifeFolio™ helps

LifeFolio™ is a digital vault built around exactly this kind of mess. For £2.99 a month, you get:

• An actual map of the estate. All assets, debts, properties, pensions, policies, in one place. The first step in any IHT planning is "what do we actually own" — and it's the step most families have never properly done.
• A view of where the thresholds sit. Not advice, but a clear picture of which allowances are in play, which are at risk, and where the £2m taper might be biting.
• A shared family view, if you want it. So you and your parents (or you and your partner) can see the same picture, without anyone having to explain everything from scratch in a crisis.
• A proper home for the will. Encrypted, accessible, findable. So the document that controls the residence allowance actually does what it's supposed to.

We also do professionally reviewed, legally binding wills for £60. Often the single most useful piece of admin standing between a family and an avoidable IHT bill.

The bottom line

The £1m figure isn't wrong. It's just conditional, and the conditions are doing more work than the headline suggests. For couples without children, couples who aren't married, couples whose estate has quietly drifted over £2m, or couples with a will that hasn't been touched in fifteen years — the number that's been giving them peace of mind may not actually apply.

The good news is that almost all of this is fixable, if it's looked at early. The bad news is that "early" usually means a decade before anyone thinks they need to.

If you'd like a clearer view of where things actually stand — for you or, more likely, to prompt a useful conversation at home — take the Estate Readiness Assessment. It's a few minutes, and it tells you a lot more than the headline number ever will.

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Inheritance tax planning is highly individual. This article is for informational purposes only and does not constitute legal, tax, or financial advice. For specific situations, speak to a qualified financial planner or estate-planning solicitor.