Excess Reportable Income (ERI) — What UK ETF Investors Need to Know

If you hold popular ETFs like Vanguard’s VWRL, VUSA, or VFEM — or any other Irish-domiciled UCITS ETF — there’s a tax wrinkle that most people don’t know about until an accountant mentions it. It’s called Excess Reportable Income, and it can affect your Capital Gains Tax calculation.

What is Excess Reportable Income?

Offshore funds (including Irish-domiciled ETFs — which covers most ETFs available on UK platforms) are required to report any income to HMRC, even if they don’t distribute it. This is the “reporting fund” regime.

For distributing ETFs (ones that pay dividends to you), the income comes to you as cash. You declare it as dividend income. No CGT complication.

For accumulating ETFs (ones that reinvest dividends internally), you never receive the cash — but HMRC still treats it as if you did. The income you’re deemed to have received is called Excess Reportable Income (ERI). It’s reported per share, usually as a tiny amount like £0.004231 per unit.

Here’s the twist: because you’ve already been taxed on this deemed income (or should have been), it gets added to your Section 104 pool cost. This prevents you from being taxed twice — once as income, and again as a capital gain when you eventually sell.

Why this matters in practice

Let’s say you hold 1,000 units of an accumulating ETF. The fund reports ERI of £0.05 per share for the year. That’s £50 of reportable income you should declare — and £50 that gets added to your S104 pool cost.

Without the pool adjustment: when you sell, your pool cost is too low, and your capital gain is overstated. You end up paying CGT on income that was already taxable as income. Double taxation.

With the adjustment: the pool cost goes up by £50, reducing your eventual capital gain by £50. The income is taxed as income, and only the genuine capital growth is taxed as capital gains.

Which funds does this affect?

Any offshore fund that’s on HMRC’s list of reporting funds and that retains income rather than distributing it. The most common ones UK retail investors hold:

For distributing funds, the ERI amount is usually very small or zero — because the fund pays out most of its income. For accumulating funds, the ERI amount is more significant because the income is retained.

How to find your ERI figure

This is the annoying part. You need to look at the fund manager’s annual reportable income document. For Vanguard funds, this is published on their website under “Reportable Income” or in their tax documents section.

The document will list the ERI per share for each reporting period (usually once per year). You need:

The report date: The end of the fund’s reporting period.

The ERI per share: The excess reportable income per unit, in GBP (or the currency of the share class).

How many shares you held on the report date: This determines your total ERI for the period.

Your total ERI = shares held × ERI per share.

This amount should be declared as income (typically in the “Foreign” section of your tax return). And the same amount gets added to your S104 pool cost.

What if you’ve been ignoring ERI?

Most retail investors have. The amounts are often small — a few pounds per year. For a modest portfolio of accumulating ETFs, we’re talking single-digit or low-double-digit ERI annually.

Strictly speaking, you should report it and adjust your pool. In practice, HMRC is unlikely to query missing ERI declarations of a few pounds. But for larger holdings (hundreds of thousands in accumulating funds), the ERI adds up and failing to adjust the pool could mean overpaying CGT when you sell.

If you want to get it right — and you should — the adjustment is easy. It’s just an addition to the pool cost.

ERI in TaxBull

TaxBull supports ERI adjustments. On the rates page (Step 2), there’s an ERI section where you can enter: the ticker, the report date, and the ERI per share. The calculator looks up how many shares you held on that date from your transaction history, computes the total adjustment, and adds it to your Section 104 pool cost automatically.

You’ll see the adjustment noted in the warnings with the exact amount added. This gives you a proper audit trail for your records.

ERI vs equalisation — they’re different things

People sometimes confuse ERI with equalisation payments. They’re related but distinct:

ERI (Excess Reportable Income): Applies to all holders of a reporting offshore fund. It’s the income the fund earned but didn’t distribute. Affects accumulating funds most.

Equalisation: A mechanism some funds use to ensure that when you buy units partway through an income period, you’re not taxed on income that accrued before you bought. The “equalisation” portion of your first dividend is actually a return of capital, not income. It reduces your acquisition cost rather than being taxable income.

Equalisation is more complex and varies by fund. If your dividend confirmation shows an “equalisation” amount, that’s a partial return of capital that should reduce your pool cost. Most UK CGT calculators (including TaxBull, at present) don’t handle equalisation automatically — it typically requires manual adjustment.

This is a technically complex area of UK tax law. The interaction between income tax (on ERI) and CGT (on pool adjustments) depends on your specific circumstances. We strongly recommend consulting a tax professional if you hold significant amounts in offshore accumulating funds.