Planning a Financial Windfall: The First 90 Days After Receiving a Large Sum

Whether it comes from a business sale, an inheritance, a divorce settlement, a property transaction, a critical illness payout, a large bonus, a redundancy package, or a lottery win, a sudden large sum of money creates both an extraordinary opportunity and a significant set of risks.

Research consistently shows that a large proportion of windfall recipients — estimates vary, but some studies suggest 30–70% — end up worse off within a few years than they would have been had they received the money gradually. The reasons are well understood: hasty decisions, pressure from family and friends, poor investment choices, lifestyle inflation, fraud and exploitation, and failure to address the tax dimension.

This guide provides a practical 90-day framework for anyone receiving a large sum, covering what to do (and what to avoid) in the critical period after a windfall arrives.

The value of investments can fall as well as rise. Tax rules vary by circumstance and jurisdiction. This article is general guidance only — not advice specific to your situation.

Before Day One: Change Nothing

The single most important piece of advice for anyone who knows a large sum is coming — whether a business sale about to complete, an inheritance in probate, or a divorce settlement being finalised — is to change nothing about your daily financial life until professional advice is in place.

The time before the money arrives is the time to:

• identify and engage a qualified independent financial adviser
• take initial tax advice on the expected sum
• brief your existing accountant or tax adviser
• identify what legal documents may need updating (will, LPA)
• make a rough list of your existing financial position (assets, debts, income, commitments)

Arriving at Day One with a professional team in place — even if they have only had a brief initial briefing — puts you in a far better position than having to scramble for advice under pressure after the money lands.

Days 1–7: Immediate Safety and Liquidity

Park the Money Safely

On receipt of a large cash windfall, the immediate priority is capital safety:

FSCS protection. UK bank deposits are protected by the Financial Services Compensation Scheme (FSCS) up to £120,000 per person per institution (raised from £85,000 on 1 December 2025). For very large sums, spreading across multiple banks is essential. Under FSCS temporary high balance rules, balances of up to £1.4 million may be protected for six months following specific life events (property sales, divorce, redundancy, inheritance, insurance payouts, and a few others). Check whether your windfall qualifies for temporary high balance protection and notify your bank in writing.

Government-backed savings. National Savings & Investments (NS&I) accounts hold unlimited balances backed by the UK government — a safe temporary home for large sums while longer-term decisions are made.

Money market funds. Institutional money market funds invest in very short-term, high-quality instruments and provide security, liquidity, and a modest return. They are not deposit-protected but are widely regarded as very low risk. Available through major platforms.

Do Not Tell Anyone

One of the most reliable pieces of advice from wealth advisers working with windfall recipients is to avoid discussing the sum with family and friends in the immediate period. Not because secrecy is inherently desirable, but because:

• People's financial expectations and requests change fundamentally once they know you have money
• Gift or loan requests from well-meaning people create enormous pressure
• Fraud and exploitation often begins with information
• You need time to think clearly, which is difficult under social pressure

Report What You Need to Report

Depending on the source of the windfall, certain notifications may be required:

• HMRC self-assessment. If the windfall triggers a tax liability (e.g., CGT on a business sale), HMRC may need to be notified. In some cases (UK property disposals), reporting deadlines are 60 days after completion.
• Bank Suspicious Activity Reports. Banks receiving large incoming transfers may ask for source of funds documentation. This is normal anti-money-laundering procedure. Having documentation of the source ready avoids delays.
• Benefits notification. If you receive any means-tested benefits, you are legally obliged to notify the relevant authority of a change in capital.

Days 7–30: Understand What You Have

Establish Your Net Financial Position

Make a comprehensive list of:

• Total windfall received (net of any immediate payments already made)
• Tax likely to be due and when
• Existing savings, investments, pensions, property
• Debts — mortgage, personal loans, credit cards, student loans
• Committed expenditure — school fees, mortgage payments, maintenance, rent
• Any near-term large expenditure (home purchase, major renovation, education costs)

This gives you a total net worth picture and a cash-flow forecast, which is the foundation of any financial plan.

Understand the Tax Dimension

Different windfalls have very different tax profiles:

• Inheritance received: Typically not taxable on receipt (estate pays IHT); future income from inherited assets is taxable
• Critical illness payout: Tax-free
• Business sale proceeds: Subject to CGT (potentially at 18% with Business Asset Disposal Relief for 2026/27, up to a £1m lifetime limit; otherwise 18%/24%)
• Redundancy pay (first £30,000): Tax-free; excess is subject to income tax
• Divorce settlement lump sum: Generally not a taxable event for the recipient; future investment income is taxable
• Lottery or gambling winnings: Not subject to income tax in the UK; investment returns from these funds are taxable

In every case, future investment income, dividends, interest, and capital gains on the windfall will be taxable. Understanding this shapes the choice of investment wrapper.

Days 30–60: Address Immediate Priorities

Debts

High-interest debt should almost always be cleared promptly:

• Credit card debt (typically 20–30% APR) — always clear immediately
• Personal loans (typically 5–15% APR) — generally clear if no early repayment penalty
• Mortgages — more nuanced; overpayments reduce future interest, but if the mortgage is at a low fixed rate and early repayment charges apply, it may not be the best immediate use

Clearing debt provides a guaranteed return equivalent to the interest rate. This is risk-free, unlike investment returns.

Emergency Fund

Separate from the investment decision, establish a permanently accessible emergency fund of three to six months' essential expenditure. This exists for unexpected costs — not investment returns. A Cash ISA, easy-access savings account, or similar is appropriate.

Essential Insurance Reviews

A significant windfall changes your insurance needs:

• Life insurance. Increased net worth may mean existing life cover is redundant — or conversely, that dependants now need more protection.
• Income protection. Investment income may now supplement or replace earned income — does the income protection cover still make sense?
• Property and contents insurance. If purchasing a home or major assets, update coverage.
• Liability insurance. Significant wealth can increase the risk profile of personal liability claims.

Immediate Estate Planning

Update your will to reflect the new estate. Review and update:

• Beneficiary designations on pensions and life insurance
• Lasting Powers of Attorney (if not already in place)
• Any trust structures you hold or benefit from

Days 60–90: Investment Strategy

By this stage, the immediate pressures are managed. The focus is now on building a long-term investment strategy.

Set Objectives First

Before selecting investments, establish clear objectives:

• What is the primary purpose of this money? (retirement income, school fees, property purchase in five years, passing to children)
• What is the time horizon?
• What is your genuine risk tolerance — how would you feel if the portfolio fell 20% in a market correction?
• Do you have any income requirements from the portfolio now?
• Do you have any ethical or sustainability preferences?

Without clear objectives, it is impossible to determine the right strategy. Investment is a means to an end — not an end in itself.

Tax-Efficient Wrappers

Invest within the most appropriate tax-efficient wrappers first:

1. Pension (SIPP) — up to £60,000 per year plus carry-forward; highly efficient for those with earned income
2. ISA — up to £20,000 per year; permanently tax-free
3. Offshore investment bond — particularly suitable for non-UK residents, those planning to return to the UK, or those wanting long-term tax deferral
4. Onshore investment bond — similar but with UK-specific rules; can be suitable for basic-rate taxpayers
5. General investment account (GIA) — for amounts above wrapper capacity; use tax-loss harvesting and annual CGT allowance efficiently

Phased Investment

Investing a large lump sum immediately into markets exposes you to sequence-of-returns risk. Phasing investment over 12–18 months reduces this risk (though evidence shows that immediate investment statistically outperforms phased investment more often than not; the value of phasing is psychological as much as financial).

Diversification

A windfall should not be concentrated:

• Across asset classes (equities, bonds, property, alternatives)
• Across geographies (UK, developed international, emerging markets)
• Across managers and platforms
• Across currencies (if relevant to your situation)

Avoid being persuaded into a single asset class, a single manager's products, or any structure you do not fully understand.

What to Avoid

High-pressure investment opportunities. Financial fraudsters actively target known windfall recipients. If anyone approaches you with an investment offering exceptional returns with little or no risk, walk away. This is one of the most reliable indicators of fraud.

Rushing into property. A windfall prompts many recipients to buy property immediately. Property is illiquid; market timing matters; and it is not always the best investment compared to alternatives. Take time.

Over-generosity immediately. Giving money to family and friends before your own position is secure is a common and often regretted pattern. Your own financial security — long-term income, retirement provision, emergency fund — comes first.

Celebrity investment trends. Cryptocurrency, private investment rounds, exclusive funds — these may be perfectly legitimate but should be evaluated rigorously, not pursued on excitement or fear of missing out.

How Global Investments Can Help

Global Investments advises high-net-worth individuals and internationally mobile families navigating sudden wealth events. Our experience covers business sale windfalls, inheritance, divorce settlements, corporate transactions, and bonus events.

We provide a clear, structured approach: understanding your objectives, establishing the tax position, optimising wrapper selection, building a diversified investment strategy, and integrating the windfall into a comprehensive long-term financial plan.

For international clients, we bring cross-jurisdictional expertise across the markets in which Global Investments operates.

Speak with a Global Investments adviser in confidence. Early engagement — as soon as you know a windfall is coming — produces the best outcomes.

This article is for general information only and does not constitute financial or legal advice. Tax rules are subject to change. The value of investments can fall as well as rise. Seek independent professional advice.