Excess Reportable Income — the silent UK ETF tax

What is Excess Reportable Income?

Excess Reportable Income (ERI) is income an offshore fund earns but doesn't distribute as a cash dividend. For a UK taxpayer, HMRC still wants the tax on it — in the year the fund's reporting period ends, even though no money has hit your bank.

It applies to accumulating UCITS ETFs domiciled outside the UK that have HMRC Reporting Fund status (the status that lets gains be taxed as CGT rather than income). Virtually every popular UK retail ETF — VWRP, VUAG, CSPX, IWDA, SWDA, VFEM-equivalent acc share classes, AGGG etc. — falls into this category.

The mechanic in one sentence: the income the fund retained instead of distributing is treated as if it had been distributed to you, taxed as a dividend, and reinvested. No cash changes hands. HMRC taxes the deemed distribution.

Why ERI exists — the policy logic

Without ERI, every UK investor would buy accumulating offshore funds, never receive a dividend, never declare any dividend income, and only ever be taxed when they finally sold — at CGT rates, which are lower than dividend tax rates for higher earners. That would be a huge tax break for accumulating offshore funds vs UK-domiciled funds or distributing funds, and would create an obvious incentive to push everyone offshore.

HMRC's solution: if the fund earns income, you pay tax on it now, at dividend rates, regardless of whether the fund distributes it. The "Reporting Fund" regime makes the fund tell HMRC what its income was each year, and HMRC publishes the figures.

Who ERI affects — and who it doesn't

• Affected: GIA holders of accumulating offshore ETFs. Anyone holding VWRP, VUAG, CSPX, IWDA, SWDA, AGGG etc. outside a tax wrapper.
• Not affected: ISA holders. Inside an ISA, dividends (including ERI deemed dividends) are tax-free. You can ignore ERI entirely.
• Not affected: SIPP / pension holders. Same logic — pension wrappers shelter all dividend income.
• Not affected: holders of distributing ETFs (VWRL, VUSA, IUSA etc.) in a GIA. You receive a real dividend, you pay tax on the real dividend, no extra reporting beyond the normal dividend. No ERI by design.
• Not affected: holders of UK-domiciled OEICs / unit trusts. Those distribute (or notionally distribute) in line with UK tax rules, not the offshore reporting fund regime.

How to find your ERI figure

Your platform almost certainly does NOT send you an ERI statement. You have to find it yourself. The standard process:

1. Identify the fund's reporting period end. This is usually NOT 5 April. Vanguard Ireland funds typically have 30 June year-ends. iShares Ireland funds typically have 28/29 February or 30 November year-ends. The fund's KIID or annual report tells you.
2. Wait six months from period end. The fund has six months to publish its Reporting Fund data. So a 30 June year-end means data appears around late December.
3. Look up the per-share ERI figure. Each fund publishes a per-share Excess Reportable Income figure on its website, typically buried in the "investor information" or "Reporting Fund status" section. For Vanguard, see global.vanguard.com. For iShares (BlackRock), see ishares.com. For Invesco see invesco.com.
4. Multiply by the number of shares you held on the "reporting date". The reporting date is the day six months after the fund's period end. Critically: this is NOT how many shares you held during the year. It's how many you held on one specific day.
5. That product is your taxable ERI for that fund for that period. Declare it as foreign dividend income on Self Assessment (SA106 supplementary form).

Worked example: VWRP in a GIA

Say you bought 500 shares of VWRP (Vanguard FTSE All-World Acc) on 10 January 2026 at £130/share, total cost £65,000. You held all 500 shares throughout the period.

• VWRP fund year-end: 30 June 2026
• Reporting date: 31 December 2026 (six months after year-end)
• Published ERI per share (illustrative figure): £0.80 per share
• Shares held on 31 December 2026: 500
• Your ERI for 2026: 500 × £0.80 = £400

This £400 is taxed as a foreign dividend in your 2026/27 Self Assessment return. If you're a higher-rate taxpayer with no spare Personal Savings Allowance and strong>£135<, the dividend tax is £400 × 33.75% = £135. You pay that £135 in cash to HMRC by 31 January 2028, even though VWRP didn't pay you a penny in dividends.

The basis adjustment — how to avoid paying CGT on the same income twice

Here's the part most UK retail investors miss entirely. Because the £400 has been treated as a deemed distribution and you've been taxed on it as income, that £400 is treated as if it had been reinvested. It becomes additional cost base for CGT purposes.

Continuing the example: when you eventually sell your 500 VWRP shares, your cost base is NOT just £65,000. It's £65,000 + £400 (the ERI you were taxed on) = £65,400. If you hold for several years and accumulate more ERI each year, this matters increasingly.

If you skip this adjustment when you sell, you'll pay CGT on the gain calculated from the ORIGINAL purchase price — effectively paying tax on the same £400 twice (once as ERI income, once as CGT). The basis adjustment is your defence.

Practical tip: keep a running spreadsheet for every offshore accumulating ETF you hold in a GIA. Each row: fund year, reporting date, shares held that day, ERI per share, total ERI, dividend tax paid. Total ERI is your accumulated basis uplift when you sell.

How to declare ERI on Self Assessment

ERI is foreign dividend income. It goes on the SA106 supplementary form (Foreign income).

1. Enter the total ERI per fund in the foreign dividend section, country code IRL (most reporting funds are Ireland-domiciled).
2. No foreign tax credit is available for ERI — the fund didn't withhold UK tax. You simply declare the gross amount.
3. The Dividend Allowance (£500 in 2026/27) applies — it's lumped with your other dividend income.
4. The tax rates are the standard dividend rates: 8.75% basic, 33.75% higher, 39.35% additional — above your Dividend Allowance.

Accumulating vs distributing — the GIA decision

Many UK retail guides say "Acc is more tax-efficient than Dist because you don't pay tax on dividends you reinvest." For a GIA holder, that's wrong. ERI means you pay the dividend tax anyway, you just have to find it yourself and there's an admin burden.

For a GIA, distributing ETFs are usually simpler:

• Cash dividends arrive in your account — your platform sends you a statement
• You declare what you received — no hunting through fund websites for ERI
• The cash is available; you choose whether to reinvest

Inside an ISA / SIPP, the choice is between accumulating (auto-compound, no admin) and distributing (cash to reinvest at your timing). Both are tax-free. Inside a GIA, distributing is usually less painful.

Key deadlines

What if you've never reported ERI but should have?

If you've held offshore accumulating ETFs in a GIA for years and never declared ERI, you've potentially under-reported foreign income. The right thing to do is to:

1. Look up the ERI for each prior year from the fund manager's website (most publish back-history)
2. Calculate the tax due for each year, with interest
3. Use HMRC's >HMRC has been increasingly a (digital service) to disclose voluntarily — lower penalties than waiting for an enquiry

HMRC has been increasingly active on offshore reporting fund discrepancies, partly via the OECD Common Reporting Standard data feeds. The platform you bought the ETFs through reports your holdings to HMRC under CRS — HMRC can see you held them.

Frequently asked questions

Related guides

• UK ETF Reporting Fund status — the most-confused area in offshore fund tax
• Accumulating vs distributing ETFs — UK 2026/27 decision framework
• ETF fund domicile — why Ireland beats Luxembourg for UK investors
• ISA vs GIA calculator — the wrapper decision
• CGT on shares calculator — remember to apply the ERI basis uplift
• All UK Tax Drag ETF tools and guides