How much of an inheritance should I invest?

After holding 3–6 months of expenses in cash, money for goals within 5 years in savings, and clearing high-interest debt, most UK guidance suggests investing the remaining long-term portion in tax-efficient wrappers.

Should I invest a lump sum or drip-feed it?

Lump-sum investing wins on average historically, but phased investing over 6–12 months reduces timing risk and emotional stress — particularly for larger sums or volatile markets.

What percentage of an inheritance should be in cash?

There is no fixed rule. A common starting point is 10–25% in cash for emergencies and short-term needs, with the rest allocated by time horizon and risk tolerance.

Is it risky to invest the whole inheritance?

Investing money you may need within 5 years carries genuine sequence-of-returns risk. Keeping near-term needs in cash and investing only the long-term portion is the standard UK approach.

How Much Of Your Inheritance Should You Invest? UK Guide

Reviewed for accuracy and UK relevance by the Inheritance Money Advice editorial team· Last reviewed May 2026

Quick answer

How do you decide how much of an inheritance to invest?

1
Subtract 3–6 months of essential expenses for an emergency fund.
2
Subtract money needed for known goals within 5 years.
3
Subtract any high-interest debt you plan to clear.
4
From the remainder, allocate to ISAs and pensions first.
5
Decide between a lump-sum invest or 6–12 month phasing based on comfort.

The four-bucket framework

Bucket 1 — Emergency fund: 3–6 months' essential expenses in easy-access savings
Bucket 2 — Short term (0–5 years): savings, fixed-term bonds, NS&I
Bucket 3 — Long term (5+ years): diversified investments in ISA / pension
Bucket 4 — Optional: debt clearance, mortgage overpayment, gifting

Wondering what split makes sense for your inheritance?

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Worked example — £100,000 inheritance

A typical UK split for a £100,000 inheritance might be: £15,000 emergency cash, £20,000 ISA contribution, £30,000 pension top-up, £15,000 toward mortgage overpayment, £20,000 General Investment Account or Stocks & Shares ISA in subsequent tax years.

Lump sum vs phased investing

Lump-sum investing tends to win on average over decades, but phased investing — splitting over 6–12 months — reduces timing risk and is often easier emotionally for larger inheritances.

How risk tolerance changes the split

A higher cash allocation suits anyone who would lose sleep at a 20–30% market drop. A higher invested allocation suits long horizons and steady temperaments. Most UK investors land somewhere in between.

Educational · UK-focused

Wondering what people in your situation typically do?

A 60-second planner shows the considerations and common next steps for your position — no calls unless you ask.

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Where to read next

See should you invest or save, how to build an investment plan, and the full complete guide.

Published January 2025 · Last reviewed May 2026

How Much Of Your Inheritance Should You Invest?