What to do with a windfall

A windfall is the rare money problem people are happy to have. That's what makes it risky. Sudden money tends to get spent at the speed of good news, and the decisions that matter most are the dull ones.

This guide covers the tax rules for the common kinds of windfall, what usually comes first, where your money is protected, and why waiting is a perfectly good plan.

Is it taxed?

It depends where it came from. The good news is that for most windfalls, the answer is no, or not by you.

An inheritance

GOV.UK is clear that beneficiaries don't normally pay tax on things they inherit. Any Inheritance Tax is paid from the estate by the person dealing with it, before the money reaches you.

For context, there's normally no Inheritance Tax if the estate is worth less than £325,000, and the standard rate above that is 40%. Exemptions and allowances can change those figures for a particular estate, which is the executor's job to work out.

What you inherit can create tax later, though. GOV.UK gives the example of rental income from a house left to you in a will. The inheritance isn't taxed; the income it produces can be.

A gift

A gift from a living person usually isn't taxed when you get it. Inheritance Tax can come into it if the giver dies within seven years: GOV.UK says no tax is due on gifts if the giver lives for seven years after giving them. If they don't, tax is normally paid from their estate. The person receiving a gift only has to pay if gifts worth more than £325,000 were given in the seven years before the death.

Some gifts are outside Inheritance Tax altogether, like gifts up to £3,000 a year in total from one giver, small gifts of up to £250 per person, and wedding gifts of up to £5,000 from a parent.

A prize

Premium Bond prizes and National Lottery wins are on GOV.UK's list of income you don't pay tax on. Win £10,000 and you keep £10,000.

Then the interest is a different matter

Once a windfall is sitting in a savings account, the interest it earns is income, and it can be taxed. Most people have a Personal Savings Allowance: up to £1,000 of interest a year tax-free for basic-rate taxpayers, £500 at the higher rate and nothing at the additional rate. Some people on low incomes can also get up to £5,000 of interest tax-free through the starting rate for savings.

A large windfall in an ordinary savings account can go past those limits quickly. Interest in an ISA isn't taxed, and you can put up to £20,000 a year into ISAs in the 2026 to 2027 tax year. Our ISA guide explains the types.

What usually comes first

There's an order to this that holds for most people. It isn't exciting, which is how you know it's sound.

1. Expensive debt

Credit cards, overdrafts and loans usually cost far more in interest than savings or investments earn. The FCA puts it plainly: the interest on most short-term debt is likely to be many times higher than the return on any investment. Paying it off is a guaranteed return at that rate.

If debts are more than a windfall can clear, or you're not sure which to pay first, GOV.UK suggests speaking to a debt adviser, and points to free debt advice through MoneyHelper.

2. An emergency fund

Next, cash you can reach quickly when something goes wrong. The FCA notes that many experts suggest enough to cover three to six months of outgoings. That money lives in an easy-access savings account, not in investments. You'll find rates on our savings page.

3. Then the longer-term choices

After that, it depends entirely on you. Overpaying a mortgage, a deposit for a first home, pension contributions, investing for the long run, helping family, or a holiday you'll remember: all are reasonable, and none is right for everyone.

If you're thinking about investing it, the FCA's checklist applies: don't use your emergency fund, clear any debts first, and only invest money you won't need for years. Investments can fall in value, and a windfall invested the week before a fall feels very different from one invested slowly.

Keep it protected

Savings with a UK bank or building society are protected by the FSCS up to £120,000 per person, per bank. Some banks share a licence, and the limit covers them together, so check before you split money between two names that turn out to be one bank.

Some windfalls get extra protection for a while. The FSCS can protect temporary high balances of up to £1.4 million for six months in most cases, after certain life events. Its list includes inheritance, the sale of your main home, insurance payouts, redundancy, divorce and compensation payments. Lottery wins aren't on it.

Don't rush

Nothing about a windfall needs deciding this week. Put it in an easy-access account within the FSCS limits, let it earn some interest, and take your time. The money will still be there next month. A bad decision made in a hurry might not be undoable.

News of a windfall also travels, and not only to friends. Be wary of anyone who gets in touch offering an investment, especially with guaranteed high returns or pressure to act fast. Our adviser guide covers how to check a firm on the FCA register, and how to spot a clone.

And if the sum is large enough that the choices feel heavy, that's what regulated financial advisers are for. Advice costs money. On a big enough windfall, a bad decision costs more.