Inheritance Tax (United Kingdom) - Nil-rate Band

Nil-rate Band

The Chancellor of the Exchequer's Autumn Statement on 9 October 2007 announced that with immediate effect inheritance tax allowances (often referred to as the nil-rate band) were to be transferrable between married couples and between civil partners. Thus, for the 2007/8 tax year, a married couple will in effect have an allowance of £600,000 against inheritance tax, whilst a single person's allowance remains at £300,000. The mechanism for this enhanced allowance is that on the death of the second spouse to die, the nil rate band for the second spouse is increased by the percentage of the nil-rate band which was not used on the death of the first spouse to die.

For example, if in 2007/08 the first married spouse (or civil partner) to die were to leave £120,000 to their children and the rest of their estate to their spouse, there would be no inheritance tax due at that time and £180,000 or 60% of the nil-rate band would be unused. Later, upon the second death the nil-rate band would be 160% of the allowance for a single person, so that if the surviving spouse also died in 2007/08 the first £480,000 (160% of £300,000) of the surviving spouse's estate would be exempt from inheritance tax. If the surviving spouse died in a later year when the nil-rate band had reached £350,000, the first £560,000 (160% of £350,000) of the estate would be tax exempt.

This measure was also extended to existing widows, widowers and bereaved civil partners on 9 October 2007. If their late spouse or partner had not used all of their inheritance tax allowance at the time of the spouse's death, then the unused percentage of that allowance can now be added to the single person's allowance when the surviving spouse or partner dies. This applies irrespective of the date on which the first spouse died, but special rules apply if the surviving spouse remarries.

In a judgement following an unsuccessful appeal to a 2006 decision by the European Court of Human Rights, it was held that the above does not apply to siblings living together. The crucial factor in such cases was determined to be the existence of a public undertaking, carrying with it a body of rights and obligations of a contractual nature, rather than the length or supportive nature of the relationship.

Prior to this legislative change, the most common means of ensuring that both nil-rate bands were used was called a nil band discretionary trust (now more properly known as NRB Relevant Property Trust*). This is an arrangement in both wills which says that whoever is the first to die leaves their nil band to a discretionary trust for the family, and not to the survivor. The survivor can still benefit from those assets if needed, but they are not part of that survivor's estate.

• Finance Act 2006