How To Invest A Large Cash Lump Sum Safely

Investing a large cash sum safely in the short term – what are the options?

It’s a question we’re asked frequently. There could be any number of reasons for the windfall. It could be from the sale of a business, or an inheritance from a family member who’s recently passed away. A surplus left over after downsizing your property or a gift.

The receipt of a potentially life changing amount of money is clearly a big deal. It’s important to think carefully about your options, and how this money can best help you in life.

Benjamin Franklin, whose considered counsel urges us to ‘take time for all things: great haste makes great waste.’ When it comes to making decisions about money, never have truer words been spoken. We live our lives at such a frantic pace that stopping to take stock is a dying art. Making financial decisions in haste is unlikely to bring the best result so taking some time to think things through is essential. A good financial planner will always encourage you to take your time.

Invest in haste, repent in leisure

Whatever the source of a lump sum, people sometimes feel they need to make a decision there and then about what to do with the money, almost as if it’s a burden they need to unload immediately. There is a sense that the clock is ticking and making a decision – any decision – is better than doing nothing. It isn’t!

I think this response is rooted, at least in part, in a keenness to avoid the danger of losing any cash or savings that fall outside the Financial Services Compensation Scheme (FSCS) limit of £120,000 (see below for more details on this). You might find yourself with a large sum sitting in your current account and suddenly feel exposed, and that’s perfectly natural. But there’s a difference – and a middle ground – between wanting to protect your cash assets against another occurrence of global financial meltdown and hurriedly committing yourself to a financial course of action that you might regret.

Time, space, and your own pace

We can’t overemphasise the importance of thinking carefully about financial goals and ambitions, so helping clients find the time and headspace to do this is an important part of our service.

Bearing in mind that people often come into money after key events in their lives, such as the loss of a loved one, it is particularly important that they’re given the support and space to make decisions at their own pace.

There are several short-term options open to investing your cash safely while you think things through and make plans.

Before investing: account for tax first

Before investing or moving large sums of money, it’s important to understand whether any tax may be due on the proceeds. Depending on the source of the windfall, you could face a tax liability that ranges from relatively modest to substantial.

For example, the sale of a business or investment property could trigger Capital Gains Tax (CGT), while pension withdrawals may create an income tax liability. Understanding what proportion of the proceeds may ultimately belong to HMRC is a critical first step before deciding how much can safely be invested or committed elsewhere.

Holding back enough cash to cover any potential tax bill can help avoid unnecessary stress or the need to withdraw investments at the wrong time.

Making the most of the £120,000 per institution

Firstly, as noted above, the Financial Services Compensation Scheme (FSCS) ensures that individuals receive £120,000 of protection per UK-regulated financial institution in the event of another financial crisis (of the likes we saw in 2008).

This is a per-person and per-institution amount. If you have more than one account with the same bank, you’re still only protected up to £120,000.

For amounts larger than this, individuals can split their money between a number of institutions, with none holding more than the £120,000 limit, to ensure that all their money is protected. For joint accounts, each individual gets £120,000 of protection which means the total amount covered is £240,000.

Temporary £1.4 million protection

Regulations introduced in 2015 give savers protection for up to £1.4 million for six months after what are described as ‘life events’. This includes things like selling your house (although not a buy-to-let property or second home), inheritances, redundancy, or insurance and compensation payouts that could lead to you having a temporarily high savings balance. In this situation, the higher temporary balance protection and extra window of time can be very valuable.

On the other hand, while this can be useful for the ‘life events’ listed it doesn’t cover all eventualities and has an upper limit of £1.4 million.

In addition to this, once the six months have passed (measured from the date on which the money is transferred into the account, or the date on which the depositor becomes entitled to the amount – whichever is later), the cover no longer applies.

Hub Cash Account Services

In recent years we’ve seen a rise in the popularity of Hub Cash Account Services.

As the name suggests, the investor sets up a Hub Account and then uses this account to direct cash into a range of different bank accounts.

These platform accounts can either be accessed directly or via a financial adviser and can be set up for individual investors, businesses and charities. Providers include Insignis Cash Solutions, Flagstone Cash Management and Cascade Cash Management.

The Hub account setup can offer several potential benefits:

1. First, maximise interest rate returns. The cash platforms can offer access to market-leading and exclusive rates, empowering investors to earn more interest income.
2. Second, the spread of risk. By accessing several banks, investors can invest in a range of institutions, each with their own £120,000 limit.
3. Third, time and hassle savings. As we know, setting up a bank account can be a painful experience. To fully protect £1 million, for example, an individual would need to set up a minimum of 9 bank accounts; you get my point. Setting up a Hub account, and then directing funds via a streamlined application, therefore, has considerable time benefits.

There are annual costs associated with setting up these accounts, typically in the region of 0.25% per annum (obviously make sure you know the exact cost before proceeding). Plus, investors should also consider the potential drawbacks. In addition to ongoing platform fees, some providers may charge account setup, transfer or adviser-related costs, which can reduce the overall benefit of higher interest rates. Investors should also be aware that available rates can change over time, and while cash platforms can simplify administration, they introduce an additional layer of service provider risk and complexity compared with holding deposits directly with a bank.

That being said, for many investors, the additional interest earned, increased provider diversification, peace of mind and time saved may offset the annual costs and disadvantages.

UK government bonds (gilts) as a medium-term option

For investors with a slightly longer time horizon, perhaps one to three years, UK government bonds, known as gilts, can provide a useful middle ground between cash savings and stock market investing.

Gilts are loans issued by the UK government and are generally viewed as one of the lower-risk investments available because they are backed by the government. They are traded on the London Stock Exchange and can be bought directly or through investment platforms and portfolios.

One of the key attractions of gilts for higher and additional-rate taxpayers is their tax treatment. While the interest paid by gilts is taxed as income, any gains made on the sale of gilts are completely free from Capital Gains Tax (CGT). This can make them particularly attractive for investors who have already used their annual CGT allowance or who may otherwise face CGT at 24%.

Although gilt prices can still fluctuate in value, particularly when interest rates move sharply, they can offer a relatively secure home for money that may be needed in the medium term.

National Savings and Investments options

National Savings and Investments (NS&I) are not a bank, as such, but they do offer a range of cash savings and investment products that are useful places to keep your cash securely. As they are backed by HM Treasury, they offer maximum levels of security. As they say, themselves, all the money you invest with them is 100% secure, always, but there are maximum investment limits across their various products. Their offerings include:

Premium bonds: With NS&I premium bonds, you can contribute a minimum of £25 and a maximum of £50,000 and could receive tax-free cash prizes. Every £1 you invest buys a unique bond number. Instead of paying interest, the bond numbers are entered into a monthly prize draw for the chance to win tax-free cash prizes from £25 to £1 million. Your money is accessible to you whenever you need it.

Income bonds: NS&I offer several types of income bond. Some are fixed-term with a fixed rate, others are variable. With a minimum deposit of £500 and a maximum of £1 million, income bonds are a secure way to invest your money, but rather than prizes they offer interest paid to you as monthly income. The amount of interest you receive depends on the type of bond you choose. They are taxable, but depending on the bond you have, you can potentially access your money at any time, though there can be a minimum withdrawal amount of £500.

Further NS&I products: NS&I also offers a tax-free ISA and a savings account, both of which provide instant access to your money. As interest rates and product terms can change regularly, it’s important to check the latest rates directly with NS&I before investing. These can be found on the NS&I website.

When should you move from ‘parking’ cash to investing?

While keeping large sums in cash can provide peace of mind in the short term, it’s important to remember that cash is not usually the best long-term home for wealth. Inflation gradually erodes the spending power of cash over time and, historically, investments such as equities have significantly outperformed cash and bonds over longer periods.

For goals that are five years or more away — such as retirement planning, helping children later in life, or leaving a legacy — investing in the stock market may be worth considering. A longer time horizon gives investments more opportunity to recover from periods of market volatility and benefit from long-term growth.

Importantly, investing does not have to mean taking unnecessary risks. One of the key principles of investing a lump sum sensibly is diversification — spreading money across different asset classes, sectors and geographic regions. Equities, bonds, cash, property and alternative assets can all behave differently in different market environments, helping to reduce overall portfolio risk.

Investment ISAs and pension contributions as long-term destinations

Once you have clarity on your objectives and time horizon, tax-efficient investment wrappers such as ISAs and pensions can become valuable long-term homes for your money.

Investment ISAs allow your investments to grow free from both Capital Gains Tax and income tax. The annual ISA allowance is currently £20,000 per person and is a ‘use it or lose it’ allowance, meaning unused allowances cannot be carried forward into future tax years. For couples, this can allow £40,000 to be sheltered each year.

Pensions can also be highly tax-efficient. In many cases, individuals can contribute up to £60,000 per year or 100% of their UK relevant earnings (whichever is lower) and benefit from income tax relief on contributions up until age 75. It may also be possible to carry forward unused pension allowances from the previous three tax years, subject to eligibility and earnings rules. Pensions will become subject to inheritance tax however in 2027.

For many people, gradually moving surplus cash into ISAs and pensions over time can form part of a highly tax-efficient long-term investment strategy.

Lump sum investing vs phased investing

One of the biggest questions investors face after receiving a large cash windfall is whether to invest the money immediately or phase it into the market gradually over time.

Historically, research has shown that investing a lump sum immediately has generally produced stronger long-term outcomes than holding cash and drip-feeding investments into the market slowly. This is largely because markets have tended to rise over time, meaning earlier investment provides faster exposure to long-term growth.

However, the emotional side of investing matters too. For some investors, particularly those who are nervous about investing immediately before a market fall, pound-cost averaging — investing gradually over a period of months — can help make the process feel more manageable and reduce anxiety around timing.

Importantly, delaying investment is itself a form of market timing, and very few investors consistently succeed at predicting the perfect moment to invest. Remaining in cash for too long can create a significant opportunity cost if markets rise while you wait.

Three approaches to deploying a lump sum

Broadly speaking, there are three common approaches to investing a large lump sum:

1. Investing the full amount immediately
2. Phasing investments gradually over time (often called pound-cost averaging or dollar-cost averaging)
3. Waiting for a market correction or ‘better entry point’ before investing

Historical analysis suggests that investing immediately has typically produced the strongest long-term returns because markets tend to rise more often than they fall. By contrast, waiting in cash for a market dip has historically produced significantly weaker outcomes because those opportunities can take a long time to appear — and markets may continue rising while investors wait.

For investors who prefer to phase money into the market, there are several important trade-offs to understand:

• There is usually an expected cost to delaying investment, because cash has historically delivered lower long-term returns than investments such as equities.
• The longer the phasing period, the greater the potential opportunity cost. Phasing over three months is generally less costly than phasing over three years.
• Phasing investments does not eliminate the risk of market falls — it simply spreads the timing risk across multiple dates.

The emotional and psychological side of investing

Receiving a life-changing amount of money can be emotionally overwhelming, particularly when it follows a major life event such as bereavement, divorce, redundancy or the sale of a business.

That emotional context matters because the ‘right’ investment strategy is not purely about mathematics or market history. It is also about helping investors feel comfortable enough to stick with a long-term plan.

For a younger investor with a long time horizon and a higher tolerance for risk, investing a lump sum immediately may feel entirely appropriate. By contrast, someone approaching retirement or feeling particularly cautious after receiving an inheritance may feel more comfortable phasing investments gradually over time.

Ultimately, the best investment strategy is often the one that balances evidence-based decision-making with the emotional confidence required to stay invested through periods of uncertainty.

Take your time

If you have acquired some money and you’re unsure how you are going to use it, take your time to work through your options.

While these aren’t long-term options, there are plenty of places in which you can save or invest your lump sum while you make up your mind, where it will remain perfectly secure until you’ve found the time and space to make a plan.

And, if you are ever in doubt, remember Benjamin Franklin’s words: ‘Great haste makes great waste.’

If you would like some advice in investing your money for the short or long term, or in putting together a comprehensive financial plan for your future, please get in touch to find out how we can help.

• Other cash solutions are available. We do not recommend you utilise these services without seeking advice from a qualified financial advisor.

This article does not constitute tax, legal or financial advice and should not be relied upon as such. Tax treatment depends on the individual circumstances of each client and may be subject to change in the future. For guidance, seek professional advice. 

This document is provided for information purposes only and it is not intended as promotional material in any respect. The material is not intended as an offer or solicitation for the purchase or sale of any financial product. For guidance, seek professional advice. 

Past performance is not a guide to future performance and may not be repeated. The value of investments and the income from them may go down as well as up and investors may not get back the amount originally invested.

A pension is a long-term investment not normally accessible until 55 (57 from April 2028). The fund value may fluctuate and can go down, which would have an impact on the level of pension benefits available. Past performance is not a reliable indicator of future performance. 

The tax implications of pension withdrawals will be based on your individual circumstances. Thresholds, percentage rates, and tax legislation may change in subsequent Finance Acts.  

The Financial Conduct Authority does not regulate estate planning or tax planning.

This document is marketing material for a retail audience and does not constitute advice or recommendations. Past performance is not a guide to future performance and may not be repeated. The value of investments and the income from them may go down as well as up and investors may not get back the amount originally invested.