The residence nil-rate band — currently £175,000 per spouse, transferable on first death — is one of the more valuable inheritance tax reliefs introduced in the past decade. For a married couple, it raises the effective IHT-free threshold to £1,000,000 in the right circumstances. But the eligibility conditions are stricter than the headline figure suggests, and we see the same three problems most years.
One: leaving the home to a discretionary trust
A standard discretionary will trust — the kind that has been a planning workhorse for thirty years — does not by itself qualify for the residence nil-rate band. The property must pass to "direct descendants" (children, grandchildren, step-children, adopted children, foster children) for the relief to apply.
If a discretionary trust includes direct descendants as discretionary beneficiaries, there are routes to retain the relief through appointments out of the trust within two years of death, but the planning needs to be set up correctly during the will-drafting and the executors need to be aware of the timeline. We have seen estates lose the relief simply because the executors did not know they had a two-year window to act.
Two: tapering for larger estates
The residence nil-rate band tapers away at £1 for every £2 by which the estate exceeds £2 million. For a client with a net estate of £2.35 million, the relief is fully extinguished. The taper is calculated on the gross estate before any reliefs (other than spousal exemption), so business relief and agricultural relief do not help here.
Where clients are close to the tapering threshold, modest lifetime gifting — using the annual exemption, the £3,000 carry-forward, and gifts out of normal income — can preserve a meaningful chunk of the band. We do this in small, defensible steps, documented at the time, so the relief is not lost if the gifts are challenged.
Three: downsizing during retirement
Clients who downsize during retirement — moving from a £900,000 family home to a £500,000 town house, say — sometimes worry they have lost the right to the residence band on the value of the property they no longer own. The downsizing addition exists precisely for this case, but its application is more intricate than most planning summaries suggest.
To claim it, the executors must identify the "former residence value", the value at the date of disposal, and the value of any qualifying replacement. They must also identify what portion of the qualifying residential property is closely inherited. The calculation is not difficult, but it is not the kind of thing you want your executors discovering for the first time at probate. We document the position annually, so the paper trail is in place if needed.
What we do at each review
At every annual review, for every client likely to be in IHT territory, we run a short standing checklist:
- Does the current will leave the home (or a share in it) to direct descendants in a way that qualifies for the band?
- Is the gross estate likely to be within tapering range, and if so, are there lifetime-gifting steps we should consider this year?
- For clients who have downsized: is the downsizing position documented and supported?
It is plain, careful work. The residence nil-rate band rewards exactly this kind of attention.