Receiving a large sum of money comes with a raft of opportunities and one big question: how should I best use it? Should you spend it, keep it in cash, or put it to work through investing? For many people, investment is the obvious choice to make the funds work as hard for you as possible.
A lump sum could come from many sources: an inheritance, a work bonus, or proceeds from selling a business or property. Whatever its source, we have a pretty good idea of what your investment objectives around it might be:
- Preserve capital, so that the money works hard for you.
- Beat inflation to maintain real purchasing power.
- Use tax wrappers efficiently, ensuring that both growth and withdrawals are as tax efficient as possible.
In this guide, we’ll walk through several ways to handle a lump sum, starting with building a safety net, then exploring ISAs, pensions, and advanced options such as offshore bonds.
Establish a Financial Safety Net
Before you commit to investments, make sure you have an emergency fund covering at least 3-6 months of essential expenses. If you don’t already have one, set aside some of the funds from your lump sum for this purpose.
You should keep emergency funds in either fixed-rate savings or easy-access cash accounts – these funds are for a safety net, and the objective here is not growth. It is worth noting here that as of April 2027, those under 65 will only be able to contribute up to £12,000 per year to a Cash ISA (the current allowance is £20,000).
The Financial Services Compensation Scheme (FSCS) offers protection for up to £120,000 per bank account per person, adding extra security to your emergency funds. It’s always worth double checking that your account is covered by this protection.
Building this foundation means that you can turn your attention to investing your lump sum with greater confidence.
Understand Lump Sum Investment Strategies
Lump Sum vs Pound-Cost Averaging (PCA)
Timing is one of the first considerations when deciding how to invest your lump sum. You could invest the entire lump sum up front, or spread the investments over a longer period of time (known as Pound-Cost Averaging (PCA)). Both approaches have their benefits.
In rising markets, lump sum investments have historically outperformed PCA. However, the ‘drip feed’ approach can reduce the risk of putting a large sum of money into the markets right before a market dip and smooth out the effects of market volatility.
Of course, we cannot time the markets – without the gift of clairvoyance, it’s simply impossible to. This is a core tenet of our Investment Philosophy.
However, it is possible to benefit from both methods by taking a blended approach; invest part of the lump sum up front, and phase in the rest over time. This balances the opportunity for large gains with a healthy amount of caution, reducing your overall risk. At Tideway we are laser focused on balancing risk with reward. We take the stance that in most cases, you don’t need to take as much risk as many other firms or off-the-shelf investment products would have you believe.
An experienced and qualified wealth manager can help you to assess which strategy is best for you. They will plan out the best ratio split to make the most of a blended investment approach if this is the most appropriate route for you.
Utilise Traditional Tax-Efficient Wrappers
As a first port of call, there are a number of traditional tax-efficient wrappers which are easily accessible to you. They also carry generous tax reliefs and allowances. These tried-and-tested methods are an excellent place to start when deciding how to invest your lump sum.
Stocks and Shares ISA
There are many types of Individual Savings Accounts (ISAs) on the market, but for growth purposes a Stocks and Shares ISA is an excellent tax-efficient way to invest your money.
You can invest up to £20,000 per person per year tax free, making them ideal for long-term investing. You can split the allowance across multiple accounts, and all growth and withdrawals are free of tax.
Within the S&S ISA, you can then tailor your investment portfolio according to your needs. There are typically off-the-shelf products available within them, but for the best outcome we highly recommend speaking to a wealth manager.
Pensions and SIPPs
Another great option for investing your lump sum is making full use of pension contribution allowances, including Self-Invested Personal Pensions (SIPPs).
The current allowance is up to £60,000 per tax year (or 100% of earnings, whichever is the lower), with the option available to carry forward any unused allowance from the previous three tax years. If you are on a salary sacrifice scheme for your employer pension, tax-free contributions via this method will be capped at £2,000 from April 2029 – in the meantime, you might like to maximise this useful tax-relieving feature.
All growth inside a pension is tax free, although withdrawals are taxed as income, and the tax reliefs available mean that your investment is boosted immediately.
This is a great option if your primary objective is to save for retirement and you aren’t likely to need the funds in the meantime, as access to the funds is restricted until age 55 (rising to 57 in 2028).
It’s also worth noting that, as of 2027, pensions will be included in your estate for Inheritance Tax (IHT) purposes. Depending on your personal circumstances, this could complicate your estate planning. For many people, on balance it makes sense to continue maximising pension contributions.
Gilts
Gilts can be a great way to invest your money in exchange for tax-efficient savings. They are essentially Government Bonds – you loan the government a fixed sum, and in exchange you are paid interest and, eventually, the full value is returned to you when the bond matures.
Gilts are generally considered low-risk investments, as they are issued by the government and it is generally accepted that the government has a low risk of default. They can provide stable returns with lower volatility, which can be useful for short- to medium-term investment goals. That said, if you are a DIY investor it can be easy to make mistakes if you aren’t 100% sure what you’re looking for – it doesn’t take much to accidentally end up with more risk than you intended when working with gilts.
Discover Offshore Investment Bonds
Outside of traditional tax wrappers, there are other, more complex investment products that you may be less familiar with. Offshore bonds are one such example – they can be a powerful tool when used strategically and in the right way.
What are offshore bonds?
An offshore bond is an investment wrapper (often structured as a life policy) available in offshore jurisdictions. Investors can contribute a lump sum or make regular contributions and access a wide range of funds. There is no upper limit for how much you can invest in an offshore bond.
Their key feature is known as ‘gross roll-up’, which refers to the way that any investment growth accumulates inside the bond without becoming liable for UK tax until you withdraw it. This creates an excellent environment for growth, as the compounding returns are continually reinvested.
Key benefits
- The 5% withdrawal allowance per year provides an excellent opportunity to make flexible withdrawals without immediate tax liability. You can read more about this allowance here.
- You can segment the bond and assign sections to a spouse or beneficiaries without triggering a tax charge, which is useful for IHT planning. Read more about using offshore bonds for IHT planning here.
- ‘Gross roll-up’ is a powerful and unique tool for growth of the funds inside the bond.
Practical Uses of Offshore Bonds
There are plenty of scenarios in which using an offshore bond may be appropriate for you. For example, they can be used once your ISA and SIPP allowances have been maxed out, to allow you to access additional long-term growth.
Offshore bonds do not have an upper limit on the total amount you can invest. In this sense, they are ideal for those who are looking to invest either more than £80,000 per year (the combined ISA and pension allowance), or a lump sum of more than £80,000.
They can also be used to form part of a strategy for drawing flexible income. Additionally, offshore bonds have some excellent uses as part of estate planning and IHT planning (particularly when used within Trusts).
You can also integrate the PCA strategies we discussed earlier, by staggering fund deposits or withdrawals.
A real-life case study for using Offshore Bonds:
Investing funds from a business sale
Tim, in his late 50s, came to us after selling his business for £10 million. After he had helped his children onto the property ladder, bought property, and made some donations to charity, he had set aside £5 million to invest.
His main goals were to lower his income tax bill, invest his funds for long-term growth so he can draw upon them in the future, and to think ahead to mitigate his IHT bill.
We recommended a combination of products, one of which was an offshore bond. Tim put £2 million into this tax wrapper.
This section of his portfolio will create a large amount of flexibility for Tim in the future. He can use it to access up to £100,000 of his capital each year with no immediate tax triggered, and allow the funds to grow under the benefit of gross roll-up. Later on in life, he can segment the bonds and gift all or part of it to his children. This creates an IHT-efficient method to pass on his wealth.
Considerations & risks
As with any investment wrapper, offshore bonds carry their own risks as well as their advantages.
For example, offshore bonds may have higher fees than ISAs, which can push your overall costs up. You will want to be mindful of this when looking into an offshore bond. That said, you may well find that the higher fees are a small price to pay in exchange for the growth possibilities that they offer.
Additionally, the tax rules and reporting obligations around offshore bonds are especially complex. However, in the UK it is actually not possible to set up an offshore bond yourself. You are legally required to go via a professional financial advice company. In our view, this is for the best, as it enables you to make smart use of the rules – used wisely, they can be powerful. Misused, you might land yourself in hot water!
Compare Investment Wrappers
Here’s a helpful summary of the investment wrappers we’ve discussed, at a glance:
| Wrapper | Tax Treatment | Contribution Limit | Access & Flexibility |
| Cash | Interest taxed | No UK limit | Immediate Access |
| ISA | Tax-free growth and withdrawals | £20,000 per year | Flexible, any time |
| SIPP | Tax relief on contributions, tax-free growth, income tax on withdrawals | £60,000 per year | Locked until age 55 (age 57 from 2028) but then flexible after this point |
| Gilts | Interest taxed, no CGT on gains | No limit | Immediate Access |
| Offshore Bond | Tax-deferred, gross roll-up | No limit | 5% withdrawal allowance, assignable segments |
How to get started
Deciding how to invest a lump sum can be full of complexity. By combining traditional wrappers with advanced tools such as offshore bonds, you can balance security, growth, and tax efficiency – ensuring your lump sum works harder for you now and in the future.
It can be a minefield to navigate all the different products on offer, but having a professional in your corner can provide you with the much-needed clarity required to make shrewd investment decisions. A wealth manager can recommend a bespoke plan which takes into account your goals, personal circumstances, and your own appetite for risk.
We offer a free initial guidance meeting with one of our wealth managers. This gives you the opportunity to talk through your needs and to learn how you could personally benefit from a strategy to invest your lump sum. You will receive a recommended plan of action from a highly qualified professional, at no cost.
Get in touch with us to book your initial meeting. We will be happy to help you gain clarity on your options and the best course of action.
Get in touch
Any references to tax were correct as December 2025 and may be subject to change in the future.
