UK Tax on Investment Income: Dividends, Interest, Capital Gains

UK investment income runs through three separate tax regimes: dividends, savings interest, and capital gains. Each has its own allowance, its own rates, and its own reporting threshold. For most UK residents holding investments outside an ISA or pension, the interaction of the three regimes determines the actual tax bill on a portfolio.

This guide covers the 2026/27 figures, the way allowances stack with employment income, the reporting routes, and the role of the ISA wrapper in removing investments from the UK tax framework altogether for retail investors.

Dividends: rates, allowance and stacking

Dividends from UK and foreign companies received by a UK resident are taxed under sections 384 to 396 of the Income Tax (Trading and Other Income) Act 2005 (ITTOIA). The dividend allowance is GBP 500 for 2026/27, reduced from GBP 1,000 in 2023/24 and GBP 2,000 in 2022/23. Dividends within the allowance are not taxed but still use band capacity for the rate that applies to other income.

Above the allowance, dividend rates are 8.75% at basic rate, 33.75% at higher rate, and 39.35% at additional rate. The applicable rate depends on the band into which the dividend income falls after stacking on top of other taxable income. Dividends sit at the top of the income tower, after employment income and savings interest, when applying the band structure.

Worked example: a higher-rate taxpayer with GBP 80,000 of salary receives GBP 4,000 of dividends. After the GBP 500 allowance, GBP 3,500 of dividend is taxable. The taxpayer is above the GBP 50,270 higher-rate threshold, so the dividend falls into the higher-rate dividend band at 33.75%, a dividend tax of GBP 1,181.

Reporting is on the Self-Assessment return if total dividends exceed GBP 10,000 or if HMRC has issued a notice to file. Below GBP 10,000 and within total taxable income that does not require SA for other reasons, HMRC normally collects the dividend tax through PAYE by adjusting the tax code on employment or pension income.

Savings interest: PSA and the starting rate

Savings interest is taxed under sections 369 to 381 ITTOIA 2005. The Personal Savings Allowance gives GBP 1,000 of tax-free interest to basic-rate taxpayers, GBP 500 to higher-rate taxpayers, and nil to additional-rate taxpayers. The starting rate for savings adds a GBP 5,000 band at 0% but is reduced GBP 1 for every GBP 1 of non-savings non-dividend income above the Personal Allowance.

The starting rate is therefore only useful for taxpayers whose other income is below GBP 17,570 (PA plus GBP 5,000). A retiree with GBP 13,000 of pension income and GBP 4,500 of savings interest could find the full GBP 4,500 falls in the remaining starting-rate band (GBP 4,570 of capacity), taxed at 0%.

Banks and building societies no longer deduct tax at source from savings interest. HMRC receives an annual data feed from banks for taxable interest paid, and adjusts the PAYE code accordingly. Where adjustments are insufficient or where the taxpayer's position requires SA for other reasons, the interest is reported on the relevant SA section.

Worked example: a basic-rate retiree on GBP 30,000 of pension has GBP 1,800 of bank interest. The PSA of GBP 1,000 covers the first slice; the remaining GBP 800 of interest is taxed at 20%, a savings tax bill of GBP 160. The starting rate does not apply because pension income is well above the GBP 17,570 cap.

Capital gains and the AEA

Capital gains are taxed under TCGA 1992. The annual exempt amount is GBP 3,000 for 2026/27. Above the AEA, rates from 30 October 2024 are 18% for basic-rate taxpayers and 24% for higher and additional-rate taxpayers across all asset classes (residential, non-residential, listed shares, cryptoassets, unit trusts).

Gains stack on top of income for band purposes. A basic-rate taxpayer with significant gain can have part taxed at 18% (within remaining basic-rate band capacity) and part at 24% (above the GBP 50,270 threshold once the gain pushes the stacked total over). The mechanics mirror dividends but with different rates.

Reporting is on the Self-Assessment return where gains exceed the AEA or where proceeds exceed four times the AEA (GBP 12,000 for 2026/27). UK residential property disposals also require a separate 60-day return through the HMRC CGT on UK property account, with the tax paid by the same deadline.

Worked example: a basic-rate taxpayer with GBP 35,000 of income realises a GBP 25,000 gain on shares. After the GBP 3,000 AEA, GBP 22,000 is taxable. Basic-rate capacity remaining is GBP 15,270 (GBP 50,270 less GBP 35,000), so GBP 15,270 of gain is taxed at 18% (GBP 2,749) and the remaining GBP 6,730 at 24% (GBP 1,615). Total CGT is GBP 4,364.

ISAs and the wrapper effect

Individual Savings Accounts wrap investments in a tax-free container. Interest, dividends and capital gains within an ISA are exempt from income tax and capital gains tax, and do not need to be reported on the Self-Assessment return. The annual allowance is GBP 20,000 for 2026/27 across cash, stocks and shares, innovative finance and lifetime ISAs combined.

For a regular saver who maxes the GBP 20,000 ISA allowance each year, a substantial portfolio can be built entirely outside the tax framework over time. After 10 years of full subscriptions, the ISA pot could hold GBP 200,000 of contributions plus accumulated returns, all sheltered.

The ISA wrapper does not change the underlying investment characteristics. Stocks and Shares ISAs are subject to market risk; Cash ISAs depend on interest rate movements; Innovative Finance ISAs (peer-to-peer lending) carry default risk and limited FSCS protection. The tax benefit is a constant against those underlying risks, not a substitute for considering them.

Practical action: where a taxpayer holds both ISA and non-ISA investments, prioritising dividend-paying and interest-bearing assets inside the ISA maximises the tax shelter; growth-oriented assets that produce gains rather than income are easier to manage outside the wrapper using the GBP 3,000 AEA each year.

Foreign investments and double tax credit

Foreign dividends, interest and gains received by a UK resident are taxable at UK rates on the arising basis since 6 April 2025 (the residence-based regime that replaced the remittance basis). Where foreign withholding tax has been deducted, a credit is available against the UK tax under the relevant double taxation agreement.

US dividends typically carry 15% US withholding for UK residents who have filed Form W-8BEN with the broker. The 15% is creditable against the UK dividend tax. A higher-rate UK taxpayer pays 33.75% on the gross dividend, less the 15% US credit, leaving 18.75% of net UK tax to pay.

Worked example: USD 1,000 of US dividend received with USD 150 withheld. The gross dividend in GBP terms (say GBP 780 at an exchange rate of 1.28) is taxable. After the GBP 500 allowance, GBP 280 is at the relevant dividend rate. At higher rate the UK tax is GBP 94.50 less the GBP 117 US credit (GBP 150 USD at the same rate); the credit is capped at the UK tax due, so no further UK tax is payable.

Edge case: the four-year transitional exemption for new arrivals to the UK (non-resident for the prior 10 years) removes foreign income and gains from UK tax for the first four tax years of residence. After year four, full residence basis applies and foreign holdings are reportable. New arrivals should diary the transition end date carefully.

Frequently asked questions

How much can I receive in dividends tax-free?

GBP 500 a year for 2026/27 under the dividend allowance, reduced from GBP 2,000 in 2022/23. Within this allowance no dividend tax is due, though the dividends still use band capacity for the rate that would apply to other income above. Dividends within an ISA are entirely tax-free and outside the allowance entirely. Above the GBP 500 allowance, dividend rates are 8.75% basic, 33.75% higher, and 39.35% additional.

Do I have to report savings interest to HMRC?

Banks and building societies report taxable interest annually to HMRC under the Reporting of Savings Income Information Regulations. HMRC adjusts the PAYE code to collect any tax due. Where interest exceeds the Personal Savings Allowance and other Self-Assessment triggers apply, the interest is reported on the SA return. For most basic-rate taxpayers with modest interest the PAYE adjustment handles the position without action by the taxpayer.

How does the Personal Savings Allowance work?

Basic-rate taxpayers receive GBP 1,000 of tax-free savings interest a year; higher-rate taxpayers receive GBP 500; additional-rate taxpayers receive nil. The allowance is an allowance not a band: interest within the PSA is taxed at 0% but still counts when working out which other bands apply. The Starting Rate for Savings adds a GBP 5,000 band at 0% but is reduced GBP 1 for every GBP 1 of non-savings non-dividend income above the Personal Allowance, limiting it to taxpayers with low earnings.

Are ISA returns tax-free?

Yes. Interest, dividends and capital gains within an Individual Savings Account are exempt from UK income tax and capital gains tax, and do not appear on a Self-Assessment return. The annual ISA allowance is GBP 20,000 for 2026/27 across Cash, Stocks and Shares, Innovative Finance and Lifetime ISAs combined. The shelter is permanent: returns earned inside an ISA remain tax-free indefinitely, even after withdrawal in retirement, and ISA balances can be inherited as Additional Permitted Subscriptions by a surviving spouse.

What's the tax on foreign dividends?

UK residents pay UK dividend rates on the gross foreign dividend on the arising basis from 6 April 2025. Foreign withholding tax already deducted is creditable against the UK tax under the relevant double taxation agreement, capped at the UK tax due. US dividends typically carry 15% withholding for UK residents with a W-8BEN on file; that 15% credits against UK tax. Reporting is on the Foreign pages of the Self-Assessment return where total foreign income exceeds the de minimis levels in HMRC's guidance.