Inheritance Tax Gifts from Surplus Income: Rules and Records

Inheritance tax gifts from surplus income are exempt from the moment you make them, with no seven-year survival period and no upper limit, provided three conditions are met: the gift fits a normal pattern of giving, it comes from your income rather than your capital, and you keep enough income to maintain your usual standard of living. The rule sits in Section 21 of the Inheritance Tax Act 1984, and it is one of the few ways to move substantial sums out of an estate immediately.¹ The catch is proof. You will not be there to explain your finances when the claim is made, so the records you leave behind decide whether the exemption holds.

The Three Conditions

All three must be satisfied. The gift has to form part of your normal expenditure. Taking one year with another, it has to be made out of income. And after making it, you must be left with enough income to maintain your usual standard of living.¹

Fail any one and the gift falls back to being a potentially exempt transfer. It only drops out of your estate if you survive seven years. Die inside that window, and once cumulative gifts pass the £325,000 nil-rate band, the excess is taxed at 40%.² That band is frozen at £325,000 until April 2030.³

The phrase “taking one year with another” gives you room. A lean year followed by a generous one is not fatal. HMRC looks at the pattern across multiple years, not a perfect surplus every single one.

What Counts as Income

Income here does not follow the income tax definition. HMRC applies normal accountancy principles to decide what is income and what is capital. Qualifying sources typically include salary, self-employment earnings, state and private pensions, rental income, savings interest, dividends, and income generated inside ISAs.⁴

Some receipts feel like income but are treated as capital. Withdrawals from investment bonds are taxed as income but classified as returns of capital for this exemption. The capital element of a purchased life annuity is the same. If you take money from a flexible pension, only the taxable portion counts; the tax-free cash element does not.

Income also loses its character if it sits around. HMRC’s internal guidance treats income that has been accumulating in an account for more than two years as capital. Let dividends pile up for three years and then hand over the balance, and HMRC will argue the money had become capital by the time you gave it away. Gift your surplus promptly.

What “Normal” Means

“Normal” is where most arguments happen. HMRC’s guidance, drawing on Bennett v Inland Revenue Commissioners, says expenditure is normal if it conforms to a settled pattern. That pattern can be shown two ways: an actual history of payments over time, or a firm commitment or resolution to give which you then followed through on.⁵

A commitment does not have to be legally binding. A standing order to a grandchild’s savings account, insurance premiums on a policy held in trust, or a written resolution to make annual payments can all establish the pattern. A single large gift can qualify if it clearly starts a genuine ongoing commitment, but proving that after your death is much harder than proving five years of monthly transfers.

Evidence that strengthens a claim: a letter of wishes explaining your gifting intentions, standing orders or direct debits, and contemporaneous notes recording your surplus calculation each year.

The Standard of Living Test

After the gifts, you must still have enough income to live the way you normally do. HMRC compares your pre-gifting lifestyle with your post-gifting one. If you had to cut back on holidays, downgrade your car, or dip into savings to cover everyday costs, the exemption fails.¹

Here is where the arithmetic bites. Suppose your net annual income is £60,000 and your normal living costs are £42,000. Your surplus is £18,000, and that is the ceiling of what this exemption can cover. Gift £25,000 in that year and HMRC will ask where the extra £7,000 came from. If it came from savings or the sale of an asset, that portion is capital and does not qualify.

A gift can be partially exempt. Give £25,000 with only £18,000 of genuine surplus, and HMRC can treat £18,000 as exempt under Section 21 while classifying the remaining £7,000 as a potentially exempt transfer subject to the seven-year rule.

Records to Keep Now

This is where the exemption lives or dies. Every year you gift from surplus, document three figures: total net income for the tax year, total expenditure for the same period, and the resulting surplus. A simple spreadsheet backed by bank statements is enough. What is not enough is nothing.

Income figures should cover salary, pensions, interest, investment income, rents, and the income element of any annuities, all net of income tax paid. Expenditure should cover mortgages, insurance, household bills, council tax, travel, entertainment, holidays, nursing home fees, and other regular costs. The difference is your surplus.

Executors who have to reconstruct these figures from bank statements years after the fact often struggle. Missing data invites HMRC queries, and incomplete evidence is the most common reason claims are cut down or rejected.

What Executors Do After Your Death

Your executors report gifting on Form IHT403, filed alongside the main inheritance tax account on Form IHT400.⁶ Page 8 of IHT403 has a dedicated section headed “Gifts made as part of normal expenditure out of income,” which requires a year-by-year breakdown of income, expenditure, and surplus.⁷

The forms must be submitted within 12 months of the date of death. Missing that deadline without a reasonable excuse can bring a penalty.⁸ HMRC reviews the schedules and may raise enquiries if the figures look inconsistent with the bank statements. Accepted gifts are removed from the estate. Rejected ones revert to potentially exempt transfers, taxed if you died within seven years.

Taper relief can reduce the rate on rejected gifts made between three and seven years before death, but only where cumulative gifts in the seven-year window exceed the £325,000 nil-rate band.²

Mistakes That Sink a Claim

The biggest is keeping no records. Executors carry the burden of proof, and family recollection does not satisfy HMRC. A close second is confusing capital with income: selling shares to fund a gift, drawing a lump sum from an investment bond, or emptying a savings account that had been building for years all produce capital, whatever the money’s original source.

Gifting more than the actual surplus is the next common problem. If your records show £12,000 of surplus but you gave away £20,000, the extra £8,000 came from somewhere else, and that somewhere is almost always capital. Erratic gifting patterns also draw scrutiny: a single large gift, then nothing for three years, looks less like normal expenditure and more like an opportunistic transfer.

Some donors undermine their own claim by visibly cutting back after they start gifting. Downsizing, cancelling holidays, or trimming discretionary spending at the same time as the gifts begin suggests the gifts are being funded at the expense of your lifestyle, which contradicts the third condition of Section 21.

How This Sits Alongside the Other Gift Allowances

The surplus income rule works with, not instead of, the other inheritance tax exemptions. Those others have fixed caps but need no proof of surplus, so use them first and apply the Section 21 exemption to everything above.

Annual exemption: £3,000 per tax year, with one year’s unused allowance carried forward, giving up to £6,000 in a single year.²
Small gifts: up to £250 to any number of individuals per tax year, so long as you have not used another exemption on the same person.²
Wedding and civil partnership gifts: £5,000 to a child, £2,500 to a grandchild or great-grandchild, £1,000 to anyone else.²

The difference that matters is the cap. Those allowances are limited by their fixed amounts. The surplus income exemption is limited only by how much of your income you genuinely do not need. For someone with a large pension and modest costs, that gap can run into tens of thousands of pounds a year, entirely free of inheritance tax, provided the records prove it.

1
Legislation.gov.uk. Inheritance Tax Act 1984, Section 21
2
GOV.UK. How Inheritance Tax Works: Thresholds, Rules and Allowances
3
GOV.UK. Inheritance Tax Thresholds
4
GOV.UK. Inheritance Tax Manual – IHTM14231
5
GOV.UK. Inheritance Tax Manual – IHTM14244
6
GOV.UK. Inheritance Tax: Gifts and Other Transfers of Value (IHT403)
7
HM Revenue & Customs. Gifts and Other Transfers of Value
8
GOV.UK. How to Value an Estate for Inheritance Tax and Report Its Value