Answers · UK 2025/26

How are accumulation funds taxed if I never receive any income?

Even though accumulation units reinvest income automatically, HMRC still treats the reinvested dividends or interest as taxable in the year they arise. You also add that reinvested income to your base cost to avoid being taxed twice when you eventually sell.

Last updated: 10 June 2026Last reviewed: 10 June 2026How we verify

Full answer

Accumulation (Acc) fund units roll income back into the fund instead of paying it out, but HMRC taxes the income as if you had received it. So a higher-rate investor holding accumulation units outside an ISA still owes dividend or savings tax on the notional distribution each year, despite seeing no cash. For 2026/27 dividend income above the GBP 500 dividend allowance is taxed at 10.75% basic, 35.75% higher and 39.35% additional; interest-type distributions are taxed as savings income. The fund's tax voucher or consolidated tax certificate shows the figures. Worked example: you hold accumulation units that generate a GBP 800 notional dividend in the year. The first GBP 500 is covered by the dividend allowance; the remaining GBP 300 is taxed at 35.75% for a higher-rate investor, costing GBP 107, even though nothing was paid to you. The crucial second step protects you on sale: that reinvested GBP 800 increases your acquisition cost, because you have effectively bought more of the fund with already-taxed income. Forgetting this means double taxation when you later compute the capital gain. Offshore reporting funds add 'excess reportable income' on similar principles. All of this disappears inside an ISA or pension, where accumulation income and gains are tax-free and need no reporting. Use the Dividend Tax calculator for the income side and the Capital Gains Tax calculator for the eventual disposal, and check fund taxation at gov.uk.