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The ISA-to-pension funnel: maximising your annual allowances before a business exit

4 Aug 26 Emily Malone

A business exit can change much more than your bank balance.

For years, your business has probably been the main place where wealth has grown. It might have funded your lifestyle, shaped your tax position, and given you a clear sense of what comes next. As a sale approaches, the focus begins to shift from building value in the business to turning that value into long-term personal wealth.

Annual allowances have an important role to play here. ISAs and pensions can each help you build wealth more tax-efficiently, but they do different jobs.

An ISA can provide accessible capital for the years after an exit. A pension can offer valuable tax relief and long-term retirement security. Using them well before a sale can give you more choice once the deal is done.

We think of this as an ISA-to-pension funnel.

This isn’t about chasing tax advantages for their own sake, it’s a way of thinking about how money moves from the business into your personal life, while making sensible use of the allowances available each tax year.

Why annual allowances matter before a business exit

A sale rarely happens overnight. Even when a buyer’s interested, deals can take time. There might be a period of preparation before the sale, followed by earn-outs, deferred consideration, reinvestment requirements or a slower-than-expected transition away from the business. And that makes planning ahead valuable.

Each tax year gives you a new opportunity to use your ISA and pension allowances. Missed ISA allowance can’t be carried forward. Pension carry forward can offer more flexibility, but it comes with its own conditions and limits.

For 2026/27, the ISA allowance is £20,000. The standard pension annual allowance is £60,000, although this may be lower if the tapered annual allowance or money purchase annual allowance applies.

Used consistently over several years, those allowances can make a meaningful difference to how much of your wealth sits in tax-efficient wrappers by the time you sell.

We explore the wider importance of starting early in What most founders get wrong about exit planning. A good exit plan gives you time to prepare the business, but it also gives you time to prepare your life beyond it.

What does the ISA-to-pension funnel mean?

The phrase is just a useful way to organise your thinking.

At one end, you have money you may need access to sooner. That might be for lifestyle spending after the sale, a property move, family support, future opportunities or simply the reassurance of knowing that some capital is available without restrictions.

At the other end, you have money you’re comfortable setting aside for later life.

An ISA and a pension can support both parts of the picture.

A Stocks and Shares ISA allows investments to grow free from UK Income Tax and Capital Gains Tax, with the option to withdraw money when needed. A pension can offer tax relief on contributions and tax-efficient growth, but the money is designed for retirement rather than short-term spending. From 6 April 2028, the normal minimum pension age will rise from 55 to 57 for most people. HMRC sets out the change here.

The aim is to avoid putting too much into either bucket. A plan made entirely of pensions might leave you short of accessible capital after an exit. A plan made entirely of ISAs might miss opportunities to build longer-term wealth through pension contributions.

The right mix gives you options.

Start with accessible capital

For many business owners, the ISA side of the funnel matters because life after an exit can be less predictable than expected.

You may take time before starting another venture. You may want to reduce your working hours. You may be dealing with an earn-out period or simply working out what you want your next chapter to look like.

An ISA can provide flexibility during that period.

The 2026/27 ISA allowance is £20,000 per person. For couples, that can mean up to £40,000 of annual ISA subscriptions between you, provided each person has the funds and uses their own allowance.

We cover the fundamentals in ISA fundamentals, including the fact that income and gains within an ISA are free from UK Income Tax and Capital Gains Tax.

That does not mean an ISA should automatically be filled before every other option. The investment risk still needs to be appropriate, and the money needs to have a purpose. But where you want tax-efficient access to capital after an exit, an ISA can be an important part of the plan.

Then look at pension contributions

Pensions can become especially valuable in the years before a business exit.

For 2026/27, the standard annual allowance is £60,000. Personal pension tax relief is usually available on contributions up to the higher of 100% of relevant UK earnings or £3,600, subject to the wider annual allowance rules.

For business owners, company pension contributions may also be worth considering. HMRC says employer contributions can be an allowable business expense where they form part of a remuneration package paid wholly and exclusively for the purposes of the trade. The facts matter, particularly for controlling directors, so this needs to be assessed carefully rather than treated as automatic. HMRC’s guidance for directors and shareholders explains the principle.

This is one reason the years before a sale can be useful.

While the business is still trading, there may be an opportunity to make employer contributions as part of a wider remuneration and extraction strategy. After the sale, that route may become less straightforward. Personal pension contributions may also be limited by the level of relevant earnings you have at that point.

We look at the broader picture in How to be tax efficient as a business owner, including the role pension contributions can play alongside salary, dividends and retained profit.

Carry forward can widen the window

Pension carry forward is often one of the most valuable planning tools for business owners approaching an exit.

If you have unused annual allowance from the previous three tax years, you may be able to carry it forward and use it in the current tax year. You must have been a member of a registered pension scheme in each year you want to use, and unused allowance is used from the earliest available tax year first. HMRC explains the rules here.

This can significantly increase the amount that may be contributed beyond the current year’s £60,000 allowance.

The detail matters. High earners may have been affected by the tapered annual allowance in one or more of the carry-forward years. Anyone who has flexibly accessed a defined contribution pension may have triggered the money purchase annual allowance, which can restrict future contributions.

We explain the practical steps in Pensions carry forward: a quick guide for 2025/2026. Our piece on the tapered allowance trap is also useful if your income has been high or variable in the run-up to a sale.

A simple example

Imagine a founder expects to sell their business in three years.

They know they will want accessible capital after the sale, but they also want to strengthen their long-term retirement position.

Over those three years, they could make use of their annual ISA allowance, building a personal pool of accessible, tax-efficient capital. If they are married or in a civil partnership, their partner may have their own ISA allowance too.

At the same time, they could review pension contributions through the company, alongside any unused annual allowance available through carry forward.

The objective isn’t to maximise every allowance available. It’s to ensure that, by the time you sell, more of your wealth already sits in the right place for the life you want afterwards.

By the time the sale happens, more of their wealth may already sit in the places they’re likely to need it: some accessible, some earmarked for later life, and some still available for whatever opportunities follow.

This isn’t a way to sidestep tax on the sale

It’s important to be clear about what this planning can and can’t do.

Using ISA and pension allowances doesn’t remove Capital Gains Tax on the sale of a business. It doesn’t create a shortcut around the rules on Business Asset Disposal Relief, which taxes qualifying gains at 18% for disposals from 6 April 2026. The value lies elsewhere.

Good allowance planning helps you prepare for what happens around the sale: how income is extracted beforehand, how wealth is structured afterwards, and how much flexibility you have once the business is no longer providing regular income.

A pension contribution may also be relevant in years where you have other taxable income or gains. We tackle that in Making pension contributions to reduce capital gains tax.

When the funnel can be especially helpful

When your exit is still a few years away

A longer runway gives you more annual allowances to use.

That matters because ISA allowances reset every year, while pension carry forward only reaches back three tax years. The earlier you start mapping the opportunity, the more choices you’re likely to have.

When most of your wealth is tied up in the business

Many founders reach a point where their business represents the majority of their net worth.

That can work well while the business is growing. Ahead of an exit, it can also be useful to build a stronger personal financial base outside the company.

ISAs and pensions can help diversify where your wealth sits and how easily you can access it later.

When you’re planning for a change in income

A business sale may bring a large amount of capital, but it can also bring a change in regular income.

Building accessible ISA savings before the sale can help create breathing room. Building pension savings can help support the longer-term version of the plan.

When cashflow is changing before completion

It’s common for founders to adjust salary, dividends, pension contributions or retained profit as a sale approaches.

These decisions should not be made in isolation. They need to work alongside the company’s cash needs, the transaction timeline, tax position and your plans after exit.

When it may not be the right approach

The ISA-to-pension funnel is not about maximising allowances at any cost.

It may be less appropriate where:

the business needs cash for growth or working capital
the sale is uncertain or still some distance away
you expect to need the money before pension age
pension contributions would leave too little personal liquidity
the tapered annual allowance or money purchase annual allowance restricts the available pension contribution
your priorities are changing quickly because of family, health or lifestyle needs

Tax efficiency matters, but it should support your life rather than dictate it.

A well-funded ISA can be more valuable than an additional pension contribution if you need flexibility. A pension contribution can be more valuable than an ISA if you have enough accessible capital and want to strengthen retirement provision.

The answer depends on the wider plan.

Planning a business exit?

We can help you look at your ISA and pension allowances alongside the sale timeline, company cashflow and the life you want after the business, so the decisions you make now still feel right once the deal is done.

Where we add value

Business exits create a lot of moving parts.

The transaction itself matters, of course. But so do the years around it: the build-up, the extraction decisions, the tax years you still have available, and the way your personal financial life changes afterwards. Our role is to bring those threads together.

That could look like reviewing ISA allowances, pension carry forward, company contributions and personal liquidity in one place. It may mean deciding that some allowances are worth using now, while others should be left alone. It could also mean prioritising flexibility over tax relief for a period of time.

Good planning is rarely about finding one perfect wrapper, but giving each part of your wealth a clear purpose. We can help you figure that out.

The bottom line

The ISA-to-pension funnel is a practical way to think about allowance planning before a business exit.

ISAs can help build accessible, tax-efficient personal capital. Pensions can support longer-term wealth and may offer valuable tax relief, including through employer contributions where the conditions are met. Carry forward can widen the pension opportunity, but it needs careful checking.

The important part is the balance.

A business exit should leave you with more freedom, not a new set of constraints. Planning your annual allowances ahead of time can help make that freedom feel more secure.

FAQs

What is the ISA-to-pension funnel?

It’s a practical way of balancing ISA and pension planning before a business exit. ISAs can provide accessible personal capital, while pensions can support longer-term retirement planning and may offer tax relief. The right balance depends on your goals, cashflow and timescales.

How much can I put into an ISA before selling my business?

For the 2026/27 tax year, you can put up to £20,000 into ISAs. This allowance is individual, so couples may be able to use two allowances where appropriate.

What is the pension annual allowance for 2026/27?

The standard annual allowance is £60,000. It may be reduced if the tapered annual allowance or money purchase annual allowance applies.

Can I use pension carry forward before a business exit?

You may be able to use unused annual allowance from the previous three tax years, provided you meet the conditions. You generally need to have been a member of a registered pension scheme in each relevant year. HMRC’s carry-forward guidance explains the rules in more detail.

Can my company make pension contributions before I sell it?

Potentially. HMRC says employer pension contributions can be allowable business expenses where they are paid wholly and exclusively for the purposes of the trade. The facts of the company, your role and your wider remuneration package all matter, so this should be reviewed carefully. HMRC’s guidance for controlling directors is helpful background.

Will making pension contributions reduce Capital Gains Tax on my business sale?

Not directly. Pension contributions do not reduce the gain on the business itself. Their value usually sits in wider tax and retirement planning, rather than changing the Capital Gains Tax calculation on the sale.

Should I use my ISA allowance or pension allowance first?

There is no universal answer. An ISA offers more access and flexibility. A pension can offer tax relief and long-term retirement value, but the money is less accessible. The right order depends on your cashflow, timescale, expected exit date and plans after the sale.

Sources

Articles on this website are offered only for general information and educational purposes. They are not offered as, and do not constitute, financial advice. You should not act or rely on any information contained in this website without first seeking advice from a professional.

Capital is at risk; investments and the income from them can fall as well as rise and investors may not get back the amounts originally invested.

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, tax planning or Will writing.

Links within this article will direct to a third-party website and Finura is not responsible for the accuracy of the information or content contained within linked sites.

Date written: 06/07/2026

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