What is an ETN, and how does it differ from an ETF?

An ETF is a fund; an ETN is a debt

The names look alike and the price chart behaves the same way, but legally these are two different objects.

An ETF — exchange-traded fund — is a fund. Your money goes into a collective investment undertaking that buys securities. You hold units and therefore an indirect share of that basket. The basket is legally ring-fenced from the manager's own assets.

An ETN — exchange-traded note — is a debt security. An issuer, usually a bank, promises to pay you the return of an index. There is no basket that belongs to you. What you own is a claim on that issuer.

The distinction is not academic. It determines three things: what you own, what happens in an insolvency, and which tax reaches your return.

What happens if the issuer fails

In an ETF the basket is ring-fenced. If the fund manager collapses, the underlying securities in principle remain the property of the fund, and so of its unitholders.

In an ETN there is nothing to ring-fence. You are a creditor. If the index performs superbly but the issuer goes bankrupt, you lose money — the promise is worth only as much as whoever made it.

On top of that, an ETN is usually not UCITS. The diversification rules, the depositary and the obligations attached to a European harmonised fund do not apply. That is precisely why ETNs exist: they can deliver exposures a UCITS fund cannot reach — single commodities, exotic markets, volatility indices.

Three tax questions that fall out differently

The stock-exchange tax

For funds the TOB rate follows from two characteristics taken together: is the fund registered in Belgium, and is the share class accumulating or distributing? That combination yields 0.12% or 1.32%. The mechanics are in how the TOB rates are determined.

An ETN is not a fund, so that test does not apply to it. One thing can be said with confidence: the registration × share-class test that makes ETFs so unpredictable plays no role for an ETN. Which rate takes its place depends on the characterisation of the instrument, and that is a question to ask per ETN.

Is the return interest or a capital gain?

This is the most important question in the whole subject, and it is almost never asked.

Since 1 January 2026 realised gains on financial assets are taxed at 10%, with an exempt first tranche. Interest and other movable income are taxed at 30%, with no such tranche. See the 30% withholding tax.

An ETN is a debt instrument. For a debt instrument it is not self-evident that the difference between purchase and sale price is treated as a capital gain rather than as interest — on bonds that boundary has long been contested, and the stake here is 10% against 30%.

We are not putting an answer here, because we have no primary source for one. What we will do is state the question sharply: ask about this before you buy an ETN, and treat any article that attaches a rate to it without citing a source with appropriate suspicion.

The Reynders tax

The Reynders tax — 30% on the bond component of a fund — attaches to funds with a given proportion of debt claims. An ETN is not a fund, so that particular rule does not attach to it. This is not an exemption: it means only that the question above — interest or capital gain — becomes decisive in place of the Reynders calculation. For funds that are in scope, the tax did not disappear with the capital gains tax — the article on the Reynders tax covers how the two now combine.

The ETC: the case in between

An ETC — exchange-traded commodity or certificate — is usually also a debt security, but almost always collateralised. Behind a physically backed gold ETC there really is allocated gold in a vault.

That substantially reduces counterparty risk without removing it: the backing is a contractual arrangement, not a fund structure. Read, ETC by ETC, what exactly is backed and who holds it.

Physical gold is separately subject to its own tax regime, distinct from the treatment of an ETC that tracks it.

What you can check before buying

1. Find the legal form in the factsheet or KID. Fund, SICAV, ICAV, UCITS means a fund. Note, certificate, debt security, senior unsecured means it is not.
2. Identify the issuer. In an ETN that is the party you hold a claim on. In an ETF the manager matters less.
3. Check whether it is collateralised, and with what.
4. Check whether it is UCITS. If not, the diversification rules are absent.
5. Ask your broker for the TOB rate, and keep the answer.

The eight points that differ between two funds tracking the same index are in what to check before buying an ETF. To put two concrete funds side by side, use the ETF comparison.

Why there is no rate table here

For ETFs we can reduce the rate to a rule — registration multiplied by share class — and that rule we publish.

For ETNs and ETCs that clarity does not exist to the same degree. The Belgian consumer sources that list the stock-exchange tax by instrument type do not name ETNs or ETCs separately. Building a table by guessing would only move the problem onto your tax return.

As soon as the characterisation can be drawn from a primary source, it will be here — with its source and date, like every other figure on this site.

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This is general information on Belgian taxation, not tax or investment advice. Where this article gives no rate, that is a deliberate choice and not an omission.