An inheritance tax specialist is cautioning families that straightforward planning errors could result in losses running into hundreds of thousands of pounds. She explained that people frequently draft a will without simultaneously addressing inheritance tax considerations, a “critical oversight” given that HMRC’s tax demand can claim as much as 40 per cent of their entire estate.

More concerning still, the payment is typically required before relatives can gain access to bank accounts or property. During an already difficult period of bereavement, families may find themselves desperately attempting to raise substantial amounts simply to clear the tax liability.

Specialist Laura Rumsey, from solicitors Rogers and Norton, said: “I regularly see families caught out by the same avoidable mistakes. These are not complex loopholes; they are straightforward steps that many people just don’t realise they need to take. By understanding the rules and planning ahead, families can protect what they’ve worked hard for and avoid leaving their loved ones with an unexpected and potentially devastating bill.”

Unmarried status could cost your partner £100,000s

With UK marriages forecast to drop to record lows, with only three in 10 people anticipated to wed by 2050, Laura cautioned many couples may be unaware of the financial implications.

“If you are married and leave assets to your spouse, you are able to claim spousal exemption. This is important as the transfer between spouses on death means none of the estate is lost to tax,” she said. This enables assets to be transferred without tax implications, and “when the second spouse dies you will also have the availability of their unused tax-free bands”, potentially enabling families to transfer up to £1 million without incurring inheritance tax.

However, the law is unambiguous: “Being married really is beneficial for tax planning and remember that legally there is no such thing as a common law spouse.”

An unmarried partner receiving a £500,000 estate could be confronted with a demand of approximately £70,000, an expensive surprise many simply fail to anticipate.

The £1million tax-free loophole families forget

For numerous parents, the family residence represents far more than property and construction. It’s where offspring matured and cherished moments were created.

Understandably, most wish to hand it down. What they don’t necessarily appreciate is that doing so might unlock a substantial additional tax-free allowance.

“If you have a property that you are planning to leave to your children, you can claim up to an additional £175,000 each for you and your spouse, depending on the value of your property,” Laura said. When combined with the standard nil rate bands, “this could mean that, with a carefully planned will, married couples with children could claim up to £1million tax-free allowances on second death”.

Without adequate preparation, families risk forfeiting part of that allowance and potentially paying considerably more tax than required, she said.

The two-year rule that could save your family £100,000s

When fortunes transfer between generations, there exists a genuine danger that identical assets face taxation multiple times. However, numerous families remain unaware that a legitimate method exists to modify an inheritance following someone’s passing.

“Often people’s wealth can be generational and, to avoid double taxation of the same assets, it is possible to consider deeds of variation,” Laura said.

“These legal documents allow adult beneficiaries with capacity to change the distribution of their inheritance to other people, usually their children, for example. This means that the gift comes from the original deceased and can, for example, bypass a generation, ensuring that wealth is passed on efficiently.”

Crucially, “these deeds of variation can be considered and prepared up to two years after the date of death, which allows for careful planning before being actioned”, Laura added, concluding that for households prepared to seek professional guidance, that two-year period could deliver a considerable financial advantage.