VWCE vs IWDA 2026: Which World ETF Wins for Belgians?

Part of:
ETF Investing in Belgium (Complete Guide)

📅 Last updated: 4 July 2026
· 🏷 Topic: ETF comparison, IWDA, VWCE
· 🇧🇪 For: Belgian investors

Two of the most-chosen world ETFs among Belgian investors are IWDA (iShares Core MSCI World UCITS ETF Acc) and VWCE (Vanguard FTSE All-World UCITS ETF Acc). At first glance they look interchangeable — both accumulating, broad world-equity ETFs. But there are some relevant differences for anyone investing in Belgium.

Table of Contents

Key differences at a glance

	IWDA	VWCE
Issuer	BlackRock (iShares)	Vanguard
ISIN	IE00B4L5Y983	IE00BK5BQT80
Domicile	Ireland	Ireland
Index	MSCI World (developed markets only)	FTSE All-World (incl. emerging markets)
Number of holdings	~1,300	~3,700
TER (annual management fee)	0.20%	0.19% (reduced from 0.22% to 0.19% on 7 October 2025)
Geography	~70% US, ~30% other developed	~62% US, ~10% emerging markets, rest other developed
Registered in Belgium?	No	Yes
TOB rate (per transaction)	0.12%	1.32%

The TOB impact

On a €1,000 buy:

IWDA: €1.20 TOB
VWCE: €13.20 TOB

On a complete buy-and-sell cycle, that’s a difference of €2.40 for IWDA versus €26.40 for VWCE on €1,000. On a long-term portfolio with periodic purchases, this can have a measurable impact — particularly if you contribute every month.

Note — TOB transaction caps: TOB is capped at €1,300 per transaction at the 0.12% rate (IWDA, EIMI) and at €4,000 per transaction at the 1.32% rate (VWCE). These caps only become binding on very large orders (above ~€1,083,000 for IWDA or ~€303,000 for VWCE).

The choice on substance: developed vs incl. emerging markets

IWDA (MSCI World) covers only developed markets — US, Europe, Japan, Australia. No China, India, Brazil, etc.

VWCE (FTSE All-World) covers developed + emerging markets — broader global exposure including the growth economies.

For anyone wanting the “complete world portfolio”: VWCE.
For anyone wanting developed markets only: IWDA — optionally combined with EIMI (iShares MSCI Emerging Markets, also 0.12% TOB) if you want to keep EM as a separate position.

The “IWDA + EIMI” combination

For anyone who wants the best of both worlds:

IWDA for 88% (developed markets)
EIMI for 12% (emerging markets)

Both are not registered in Belgium → both at 0.12% TOB. The combination gives you roughly the same geographic coverage as VWCE, but at much lower transaction costs.

Drawback: you have to rebalance between IWDA and EIMI yourself as they drift from your target ratio. For anyone who prefers simplicity, VWCE remains easier.

Which ETF fits whom?

Choose VWCE if:

You want one ETF and don’t want to rebalance.
You want emerging markets in your portfolio without extra work.
You find 1.32% TOB acceptable (typically with larger, less frequent purchases).

Choose IWDA (optionally + EIMI) if:

You want to minimise TOB.
You buy frequently / in small amounts periodically.
You’re willing to rebalance once a year.

💡 Important nuance: the Belgian registration status of an ETF can change. What’s at 0.12% today could be at 1.32% tomorrow if the issuer registers a sub-class in Belgium. Always check the FSMA databases or via tools like tobcalc.com before a large purchase.

2026 capital gains tax: what it means for IWDA and VWCE holders

Since 1 January 2026, Belgian individual investors pay a 10% capital gains tax (CGT) on realized gains from equity sales, including ETF sales. The rules are identical for IWDA and VWCE — neither gets a preferential rate — but the practical implications differ depending on your situation and broker.

The basics

Rate: 10% on net realized gains in a calendar year.
Annual exemption: The first €10,000 of net gains per person per year is tax-free. Couples each have their own €10,000 exemption.
Carry-forward: If you realize less than €10,000 in gains in a year, the unused portion carries forward — up to €1,000/year, maximum €5,000 cumulative.
Step-up basis: For positions held before the law took effect, the acquisition cost is stepped up to the market value on 31 December 2025. Only gains above that reference value count. Historical paper gains before that date are fully shielded for existing holders of both ETFs.
Net losses: Losses in the same year offset gains; remaining losses carry forward one year.

Source: Law of 6 April 2026, Belgian Official Gazette 21 April 2026; FOD Financiën.

How withholding works — and why your broker matters

From 1 June 2026, Belgian-licensed brokers (Bolero, Keytrade, MeDirect, Saxo Belgium) withhold 10% automatically on the gain portion of each sale that exceeds your remaining annual exemption. You do not file a separate declaration for those transactions.

Users of foreign brokers (DEGIRO, Interactive Brokers, Trade Republic) have no CGT withheld at source. You must self-declare all realized gains in your annual Belgian tax return and pay the 10% yourself. If you trade in USD (e.g., IWDA on the London Stock Exchange), your gain is calculated in EUR at the exchange rate on the trade date — exchange rate movements can create or inflate a taxable gain independently of the ETF’s index performance. This applies equally to IWDA and VWCE; it is not a differentiator between the two, but it is worth tracking per-trade if you use a foreign broker.

Partial sales: FIFO applies

If you sell part of your IWDA or VWCE position, Belgium uses FIFO (first-in, first-out): the oldest units are treated as sold first. For investors who have been buying periodically over years, this means partial sales will often crystallize the earliest-acquired (and potentially largest) gains first. The step-up basis on 31 December 2025 protects pre-2026 gains, but units purchased from 2026 onward are in scope at their actual purchase price.

Reynders tax: not a factor for IWDA or VWCE

The Reynders tax (30% withholding on the fixed-income component of accumulating funds) does not apply to either IWDA or VWCE. Both are pure-equity ETFs with no bond component. This is sometimes confused with the new CGT — they are separate taxes, and the Reynders tax is not relevant to this comparison.

TER and compound returns: what the numbers show

VWCE’s TER was reduced from 0.22% to 0.19% on 7 October 2025. It is now marginally cheaper than IWDA (0.20%). This is a recent reversal — older articles may still show IWDA as the lower-cost option. The gap is just 0.01 percentage points.

What that 0.01% difference actually means over time

Scenario	IWDA (TER 0.20%)	VWCE (TER 0.19%)	Difference
€10,000 start + €300/mo · 7% gross · 10 years	€70,665	€70,711	€46 (VWCE ahead)
€50,000 start + €500/mo · 7% gross · 20 years	€440,607	€441,264	€657 (VWCE ahead)

Assumptions: 7% annual gross return (approximate long-run global equity average — not guaranteed and not a prediction); monthly contributions added annually; TER deducted from return. Illustrative only. Past performance does not predict future results. Source methodology: MSCI and FTSE index historical data via iShares and Vanguard factsheets.

The conclusion: the TER gap is real but negligible in absolute terms. A €657 difference over 20 years is dwarfed by the TOB difference that accumulates from monthly purchases at 1.32% vs 0.12%. For frequent buyers making monthly contributions, the TOB saving from choosing IWDA remains the dominant cost factor by a wide margin.

Dividend leakage: both ETFs are equivalent

Both IWDA and VWCE are accumulating ETFs domiciled in Ireland. Ireland’s tax treaty with the US reduces the standard 30% US dividend withholding tax to 15% at the fund level — and this treaty rate applies equally to both funds. Because both are accumulating, no dividends are distributed to the Belgian investor, so there is no Belgian dividend withholding tax at the investor level. From a dividend-leakage standpoint, IWDA and VWCE are equivalent.

Sources: iShares IWDA KIID (iShares.com); Vanguard VWCE KIID (vanguard.co.uk); Ireland–US Double Tax Convention.

Switching between IWDA and VWCE in 2026: full cost breakdown

Some investors who started with IWDA wonder whether to switch to VWCE (or vice versa). The 2026 tax environment adds a significant new cost to any switch for investors with unrealized gains above the step-up basis.

Full cost of switching a €50,000 IWDA position to VWCE

Example: you hold €50,000 of IWDA, with a step-up basis of €30,000 (the position was worth €30,000 on 31 Dec 2025 and has grown to €50,000 — a €20,000 gain above step-up).

Cost component	Amount	Notes
TOB on IWDA sell (0.12%)	€60	IWDA not registered in Belgium
CGT on gain (€20,000 gain, €10,000 exempt)	€1,000	10% × €10,000 taxable; assumes no other gains/losses that year
TOB on VWCE buy (1.32%)	€660	VWCE registered in Belgium
Total one-time friction	€1,720

That €1,720 is a permanent cost that must be recovered from future advantages. Given that the TER differential between IWDA and VWCE produces only €657 over 20 years on a €50,000 starting position, switching purely for cost reasons is not mathematically justified in most scenarios.

When switching might make sense

Your gain above the step-up is under €10,000 — no CGT is triggered, and the switch cost shrinks to TOB only (€60 sell + €660 buy = €720 on €50,000 — still meaningful but lower).
You have realized losses elsewhere that offset the gain, reducing CGT to zero.
You are starting fresh (no existing position) — no switch cost at all; simply choose whichever ETF suits your buy frequency.
Switching VWCE → IWDA if you buy very frequently in small amounts — the 1.20% per-round-trip TOB saving compounds over many transactions and may justify it.

Out-of-market risk during a switch

Selling IWDA and buying VWCE requires two separate transactions with Euronext Amsterdam settlement at T+2. You are out of the market for approximately two business days. On a €50,000 position, a 1% market move during that window equals €500 — small relative to transaction costs in most scenarios, but worth acknowledging around volatile periods.

Decision rule

If you already hold one of these ETFs and your gain above the step-up basis exceeds €10,000, the CGT cost of switching almost certainly exceeds any rational benefit from the TER difference. The cleanest path for most investors is: stay in whichever ETF you hold, keep contributing, and do not switch. Both ETFs are well-run, low-cost, and appropriate for Belgian long-term investors.

If you are starting from zero, the decision simplifies: choose IWDA (or IWDA+EIMI) if you buy monthly, VWCE if you prefer simplicity and buy quarterly or less frequently.

Frequently asked questions

Is IWDA or VWCE better for Belgian investors?

There is no universal winner. VWCE is a single ETF that already includes emerging markets and is the simplest to hold, but it carries 1.32% TOB because it is registered in Belgium. IWDA covers developed markets only at 0.12% TOB — cheaper to buy frequently — and can be paired with EIMI for emerging-markets exposure. Frequent monthly buyers usually favour IWDA (optionally + EIMI); investors who want one-fund simplicity favour VWCE.

What is the TOB on IWDA versus VWCE?

IWDA is taxed at 0.12% per transaction because it is not registered in Belgium; VWCE is taxed at 1.32% because it is. On a €1,000 purchase that is €1.20 versus €13.20. These rates can change if a fund’s Belgian registration status changes — always verify via the FSMA database or tobcalc.com before a large order.

Is IWDA or VWCE cheaper on the annual fee (TER)?

Since 7 October 2025, VWCE’s TER is 0.19% versus IWDA’s 0.20%, so VWCE is marginally cheaper. But the 0.01 percentage-point gap — roughly €657 over 20 years on a €50,000 position — is far smaller than the TOB difference for anyone buying monthly.

Should I switch from IWDA to VWCE (or vice versa) in 2026?

Usually not. Since 1 January 2026 a switch can trigger the 10% capital gains tax on gains above your €10,000 annual exemption, plus TOB on both the sell and the buy — often more than €1,000 of one-time friction that the tiny TER difference never recovers. If you already hold one of them, the cleanest path is to keep contributing and not switch.

Do IWDA and VWCE fall under the new Belgian capital gains tax?

Yes. Both are equity ETFs, so realized gains are subject to the 10% capital gains tax that applies since 1 January 2026, with a €10,000 annual exemption per person and a step-up basis on 31 December 2025. Neither ETF receives a preferential rate.

Can I combine IWDA and EIMI instead of buying VWCE?

Yes. IWDA (~88%) plus EIMI (~12%) gives roughly the same global coverage as VWCE, with both taxed at 0.12% TOB, but you have to rebalance the two yourself about once a year.

Sources

iShares — IWDA factsheet and KIID
Vanguard — VWCE factsheet and KIID
Curvo — TOB rates 2026
FSMA — Database of registered funds
FOD Financiën — Belgian tax authority
Belgisch Staatsblad — Law of 6 April 2026 on capital gains tax (Belgian Official Gazette 21 April 2026)
Wikifin.be — Belgian financial literacy platform (FSMA)

IWDA vs VWCE 2026: Which ETF Wins for Belgian Investors?

Key differences at a glance

The TOB impact

The choice on substance: developed vs incl. emerging markets

The “IWDA + EIMI” combination

Which ETF fits whom?