HMRC's IHT400 Warning Sends an Important Message: Don't Guess.

HMRC has recently reminded advisers and executors that where there is any uncertainty over whether an estate qualifies as an excepted estate, the safer course may be to submit a full IHT400.

At first glance, this might appear to be nothing more than an administrative update. I believe it highlights a much wider issue within estate administration.

The Danger of "Probably"

Many estates sit close to one of the inheritance tax thresholds.

£325,000. £500,000. £650,000. £825,000. £1 million.

It is tempting to assume that because an estate appears to fall below one of these figures, there is no inheritance tax issue. Unfortunately, estate administration is rarely that simple. Property valuations may change. Reliefs may not apply as expected. Residence Nil Rate Band conditions may not be satisfied. Transferable allowances must be correctly claimed. Lifetime gifts may affect the available nil rate band. Business or agricultural relief may require detailed analysis.

One incorrect assumption can alter the tax position significantly.

Good Estate Planning Begins With Accurate Information

At iTrust121 we have always believed that inheritance tax planning starts with establishing the facts, not trying to fit the facts around a desired outcome. Before considering trusts, gifting strategies or succession planning, the estate itself must be properly understood.

That means obtaining accurate asset valuations, understanding ownership structures, reviewing lifetime gifts, considering available reliefs and assessing liabilities correctly.

Only then can advisers determine the appropriate reporting requirements.

Compliance Is Not Simply About Tax

Some advisers see the IHT400 as additional paperwork. I see it differently. The IHT400 creates a clear evidential record of how an estate has been assessed. If HMRC later reviews the estate, the executor is in a far stronger position to demonstrate that appropriate enquiries were made and reasonable care was taken.

That protects both the estate and those responsible for administering it.

Our View

This guidance is not really about forms, it is about professional judgement. As advisers, we should never allow administrative convenience to outweigh technical accuracy. Where there is genuine uncertainty, it is often better to disclose more rather than less.

The additional work involved in preparing a full inheritance tax account is insignificant compared with the cost, delay and stress that can arise if errors are discovered later.

Questions Every Executor Should Ask

• Have all assets been professionally valued?

• Have all available reliefs actually been considered rather than assumed?

• Have lifetime gifts been reviewed?

• Does the estate genuinely qualify as an excepted estate?

• Would additional disclosure provide greater certainty?

Final Thoughts

Estate administration is built on confidence, confidence comes from evidence. When it comes to inheritance tax, assumptions are rarely a substitute for proper analysis. Getting it right the first time is always preferable to explaining it later.

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James Berkeley

Senior Counsel

iTrust121 Ltd