A question we’re often asked is: do you pay tax on accumulation funds?
The short answer is yes, if you hold them outside an ISA or a pension such as a SIPP. The income an accumulation fund reinvests for you is taxed as if you’d received it, even though no cash reaches your account. When you sell, any gain may be subject to Capital Gains Tax.
Inside an ISA or SIPP, you pay no tax on income or gains, whichever type of fund you hold.
This article explains the rules for the 2026/27 tax year. It’s general information, not tax advice.
What are accumulation funds?
Many funds come in two versions, or “share classes”:
- Accumulation (Acc): income from dividends or interest is automatically reinvested in the fund. You don’t receive cash. Instead, the price of each unit rises to reflect the reinvested income.
- Income (Inc), or distributing: the fund pays the income out to you as cash.
Accumulation funds suit investors who want growth and don’t need an income. But for tax, HMRC treats both versions the same way: the income counts as yours in the year the fund earns it.
How income from funds is taxed
The tax depends on whether the fund pays dividends or interest.
Dividend distributions (most equity funds)
The first £500 of dividends you receive in a tax year is tax-free under the dividend allowance. Above that, the rates for 2026/27 are (GOV.UK):
| Income tax band | Dividend tax rate |
|---|---|
| Basic rate | 10.75% |
| Higher rate | 35.75% |
| Additional rate | 39.35% |
The basic and higher rates rose by 2 percentage points from 6 April 2026.
Interest distributions (bond and cash funds)
If more than 60% of a fund is invested in bonds, cash or other interest-paying assets, its income is paid as interest and taxed as savings income. Basic-rate taxpayers can earn £1,000 of savings interest a year tax-free under the Personal Savings Allowance, and higher-rate taxpayers £500. Additional-rate taxpayers get no allowance.
How accumulation income is taxed
With an accumulation fund, the manager reinvests the income for you. HMRC treats this as a “notional distribution”. You must include it in your income for the year, in exactly the same way as a cash dividend or interest payment.
Example: you’re a basic-rate taxpayer and hold an equity accumulation fund outside an ISA. This year, the fund reinvests £1,500 of dividend income for you, and you have no other dividends. The first £500 is covered by the dividend allowance. You pay 10.75% on the remaining £1,000: £107.50.
Your platform sends you an annual tax certificate (often called a consolidated tax voucher) showing the accumulated income for each fund. Use it for your Self Assessment tax return. If your dividends are over £10,000 a year, you must file a Self Assessment return. Below that, you can usually ask HMRC to collect the tax through your tax code.
Capital Gains Tax on accumulation funds
When you sell fund units for more than you paid, the profit may be subject to Capital Gains Tax (CGT). In 2026/27, the first £3,000 of gains is tax-free. Above that, you pay 18% if you’re a basic-rate taxpayer and 24% if you’re a higher or additional-rate taxpayer.
The accumulated income you’ve already been taxed on is added to your purchase cost for CGT. Otherwise, you’d pay tax on the same money twice.
Example: you invest £10,000 in an accumulation fund. Over the years, £1,500 of income is reinvested and taxed as above. You sell for £15,000. Your cost for CGT is £11,500, not £10,000, so your gain is £3,500, not £5,000.
Keep records of every notional distribution. Many investors forget to add them to their cost and end up overpaying CGT.
Reinvesting dividends from income units
This is different from holding accumulation units. If you hold income units and use your platform’s dividend reinvestment service to buy more units, each purchase is a new acquisition at the price on that date. For CGT, it’s added to your existing holding in the same fund (the “section 104 pool”) at its cost.
Equalisation
The first distribution you receive after buying a fund may include an “equalisation” payment. This is a return of part of the price you paid, not income, so it isn’t taxable. Instead, you deduct it from your purchase cost for CGT. Your tax certificate shows the amount.
Offshore funds and ETFs
Many ETFs bought by UK investors are based in Ireland or Luxembourg. The tax rules for these depend on whether the fund has “reporting fund” status with HMRC:
- Reporting funds: gains are taxed as capital gains when you sell. But you may have to pay income tax each year on “excess reportable income”, which the fund reports even if it’s an accumulating fund.
- Non-reporting funds: any gain when you sell is taxed as income, at your income tax rate, rather than as a capital gain. That’s usually much more expensive.
Check that a fund has reporting status on HMRC’s list of reporting funds before you buy.
How to avoid tax on funds
The simplest way to avoid this paperwork is to hold your funds in a tax-free account:
- Stocks and Shares ISA: you can pay in up to £20,000 a year. Income and gains are tax-free, and you don’t need to report them to HMRC.
- SIPP or workplace pension: income and gains are tax-free while invested, and you get tax relief on what you pay in. You can’t usually access the money until 55, rising to 57 from April 2028.
If you’ve used your ISA allowance, you can also reduce tax by using your dividend allowance and CGT allowance each year, or by transferring investments to a spouse or civil partner who pays a lower rate of tax.
Tax rules depend on your circumstances and can change. If you’re unsure, check HMRC’s guidance or speak to a qualified tax adviser.
Disclaimer: This is not tax or financial advice. When investing, your capital is at risk.
Pedro is passionate about finance, marketing, and technology. He is a growth manager at several online projects and a former digital marketer for a fintech company.
