This is what the government says:
Gifts
There’s usually no Inheritance Tax to pay on small gifts you make out of your normal income, such as Christmas or birthday presents. These are known as ‘exempted gifts’.
There’s also no Inheritance Tax to pay on gifts between spouses or civil partners. You can give them as much as you like during your lifetime, as long as they live in the UK permanently.
Other gifts count towards the value of your estate.
People you give gifts to will be charged Inheritance Tax if you give away more than £325,000 in the 7 years before your death.
What counts as a gift
A gift can be:
anything that has a value, such as money, property, possessions
a loss in value when something’s transferred, for example if you sell your house to your child for less than it’s worth, the difference in value counts as a gift
Call the Inheritance Tax and probate helpline if you’re not sure.
Exempted gifts
You can give away £3,000 worth of gifts each tax year (6 April to 5 April) without them being added to the value of your estate. This is known as your ‘annual exemption’.
You can carry any unused annual exemption forward to the next year - but only for one year.
Small gifts up to £250
You can give as many gifts of up to £250 per person as you want during the tax year as long as you haven’t used another exemption on the same person.
The 7 year rule
If there’s Inheritance Tax to pay, it’s charged at 40% on gifts given in the 3 years before you die.
Gifts made 3 to 7 years before your death are taxed on a sliding scale known as ‘taper relief’.
Years between
gift and death
......................Tax paid
less than 3 - 40%
3 to 4 - 32%
4 to 5 - 24%
5 to 6 - 16%
6 to 7 - 8%
7 or more - 0%
Gifts are not counted towards the value of your estate after 7 years.