You want to invest your savings in the stock market without spending your evenings on it. ETFs (index trackers) are the simplest, cheapest and most diversified way for most Belgians. This guide covers everything: why ETFs, how to choose a broker, build a portfolio adapted to your horizon, and manage Belgian taxation in 2026 — TOB, Reynders tax, and the new 10% capital gains tax. For the full tax context, read our pillar guide on the 2026 capital gains tax.
Why ETFs in 2026
An ETF (Exchange Traded Fund, or "tracker") is a stock-listed fund that replicates the performance of an index — for example the MSCI World, which includes around 1,500 large companies from 23 developed countries. By buying a single ETF share, you become an owner of a fraction of all these companies at once.
ETFs have become the go-to vehicle for passive investing over the last 20 years, because they combine three structural advantages:
ETF vs active management: what the numbers say
Over 10-15 year horizons, around 80 to 90% of active funds underperform their benchmark index after fees. The cause is mathematical: an active fund must beat the market by more than its fees (often 1.5 to 2% per year) to genuinely benefit the investor. Very few do so consistently.
For a Belgian investing for retirement or a 10+ year project, the "buy and hold" strategy of accumulating global ETFs remains the simplest and most efficient.
Choosing a broker in Belgium: 6 options in 2026
To buy ETFs, you need a broker. In Belgium in 2026, six options dominate the market. The right choice depends on a simple trade-off: fees vs administrative burden.
| Broker | ETF fee (€1,000) | Auto TOB | BE account | Best for |
|---|---|---|---|---|
| MeDirect | €0 (free) | ✅ Yes | ✅ Yes | Best simplicity/cost ratio for most |
| Bolero (KBC) | ~€5 | ✅ Yes | ✅ Yes | KBC clients, looking for reliability |
| Saxo Bank Belgium | ~€2 | ✅ Yes | ✅ Yes | Pro platform, low fees |
| DEGIRO | ~€1 (Core ETF) | ✅ Yes | ❌ NL | Low fees, NBB declaration required |
| Trade Republic | €1 + manual filing | ❌ No | ❌ DE | Monthly savings plans, mobile-first |
| Interactive Brokers | ~€1-3 (variable) | ❌ Partial | ❌ IE | Advanced investors, multi-currency |
MeDirect — the unbeatable value
Since August 2025, MeDirect made all ETF transactions free. Transaction fees drop to €0. Even better: MeDirect has a Belgian branch, automatically withholds the TOB, the withholding tax on dividends and the Reynders tax. The platform is protected by the Belgian deposit guarantee fund (up to €100,000). Only downside: 0.5% currency conversion fee (double the average) if you buy ETFs not listed in euros — so prefer EUR-listed ETFs on Euronext Amsterdam or Xetra.
Bolero (KBC) — the safe choice
Bolero is one of the oldest Belgian brokers. About €5 fees for €1,000 invested in an ETF, but everything is handled for you: TOB, dividends, Belgian taxation. No foreign account declaration. Ideal if you're already a KBC client or want absolute peace of mind.
Saxo Bank Belgium — the pro platform
Saxo Bank has a Belgian branch that automatically handles all taxation. About €2 fees for €1,000 on an ETF like IWDA — among the lowest of Belgian brokers. Good web and mobile platform. A solid compromise for those who want to go beyond ETFs (individual stocks, options) without tax complexity.
DEGIRO — low fees, NBB declaration
DEGIRO offers a "Core ETF" list with €1 transactions (sometimes free once a month). It's one of the cheapest brokers in Europe. DEGIRO automatically withholds the TOB, but as it's a Dutch broker, you must declare your account once with the National Bank of Belgium (NBB) and yearly in your tax return.
Trade Republic — savings plans and mobile
Trade Republic offers free monthly savings plans from €1 on hundreds of ETFs, with fractional shares. That's unique on the Belgian market. But Trade Republic is German: you must calculate and pay the TOB yourself via MyMinFin every month (before the end of the 2nd month following the transaction). Forgetting = fine. And you must declare the account with the NBB.
Interactive Brokers — for advanced users
Interactive Brokers (IBKR) is powerful: multi-currency, near-zero FX fees (0.002%), access to all global stock exchanges. But the interface is complex and Belgian tax handling is partial. Reserved for investors who know what they're doing.
Any account at a broker established outside Belgium (DEGIRO, Trade Republic, IBKR, MEXEM…) must be declared once at the National Bank's Central Point of Contact (CPC), and every year in your tax return (section XIII for foreign accounts). Forgetting can lead to administrative penalties. Belgian brokers (Bolero, MeDirect, Saxo Belgium, Keytrade, Belfius Re=Bel) are not concerned.
ETF taxation in Belgium 2026 — the 3 taxes to know
Investing in ETFs from Belgium involves three tax layers, plus the classic withholding tax on dividends. Here's the full picture as of 1 January 2026.
1. The TOB — stock exchange tax
The TOB is levied on every purchase AND sale on the stock market. For ETFs, the rate depends on two criteria: registration in Belgium or not, accumulating or distributing.
| ETF type | TOB rate | Example |
|---|---|---|
| Accumulating, registered in EEA but outside Belgium | 0.12% | IWDA, SWRD, EMIM, IMIE |
| Accumulating, registered in Belgium | 1.32% | VWCE with some brokers |
| Distributing (pays dividends) | 0.35% | VWRL, SPYL |
The TOB is capped at €1,300 for accumulating at 0.12% and €4,000 for accumulating at 1.32%. Practical conclusion: prefer accumulating ETFs at 0.12% domiciled in Ireland or Luxembourg.
2. The Reynders tax — 30% on the bond component
If your ETF contains at least 10% bonds (case of mixed or bond ETFs), the Reynders tax applies on sale: 30% on the gain of the bond component only. It is automatically withheld by Belgian brokers.
For a 100% equity ETF like IWDA or VWCE, the Reynders tax does not apply at all. This is one of the reasons most Belgians who want a simple portfolio prefer pure equity ETFs.
3. NEW: the 10% capital gains tax
Since 1 January 2026, any realised gain on the sale of an ETF (above the annual exemption of €10,000) is taxed at 10%. This is the biggest structural change for Belgian investors.
- Annual exemption of €10,000 per person (€20,000 for a couple)
- Historical gains exempt: the value of your ETFs as of 31 December 2025 serves as the reference acquisition price
- FIFO method: shares bought first are sold first for tax purposes
- Losses deductible in the same year (with opt-out)
For full details (opt-in/opt-out, FIFO method, optimisation strategies), read our pillar guide on the 2026 capital gains tax.
4. Dividend withholding tax — still there
If you hold a distributing ETF, every dividend paid is subject to the 30% withholding tax. First structural reason to prefer accumulating ETFs in Belgium.
Accumulating or distributing? The default choice
All major global ETFs come in two versions: accumulating (Acc) and distributing (Dist). The choice has a major tax impact in Belgium.
| Criterion | Accumulating (Acc) | Distributing (Dist) |
|---|---|---|
| Dividends | Reinvested in the fund, invisible | Paid to your account every quarter |
| 30% withholding on dividends | ❌ No | ✅ Yes (on every payment) |
| TOB on buy/sell | 0.12% (typical) | 0.35% (typical) |
| Capital gains on sale | 10% above €10,000/year | 10% above €10,000/year |
| Snowball effect | ✅ Maximal | ❌ Reduced (manual reinvest after tax) |
For the accumulation phase (before retirement), almost always take the accumulating version. You avoid the 30% withholding on dividends and maximise compound interest. The distributing version only becomes interesting in the consumption phase (retirement, supplementary income) where you want regular payouts.
Building your DIY portfolio — 3 simple models
No need for 15 different ETFs. Three approaches cover 95% of a Belgian investor's needs.
Model 1 — Ultra-simple: 1 single global ETF
One ETF that covers the whole world economy. Ideal if you want maximum simplicity.
| ETF | ISIN | Index | TER | TOB |
|---|---|---|---|---|
| IWDA (iShares Core MSCI World) | IE00B4L5Y983 | ~1,500 companies, developed markets | 0.20% | 0.12% |
| SWRD (SPDR MSCI World) | IE00BFY0GT14 | ~1,500 companies, developed markets | 0.12% | 0.12% |
| VWCE (Vanguard FTSE All-World) | IE00BK5BQT80 | ~3,700 companies, whole world (incl. emerging) | 0.22% | 1.32% (often) |
| IMIE (SPDR MSCI ACWI IMI) | IE00B3YLTY66 | ~3,000 companies, whole world (incl. emerging and small caps) | 0.17% | 0.12% |
For a beginner, IWDA remains the most solid default choice: huge liquidity (over €100 billion under management), TOB at 0.12%, accumulating, domiciled in Ireland. IMIE is an excellent alternative that includes emerging markets and small caps in a single fund.
Model 2 — The world combo: IWDA + EMIM
To add emerging markets (China, India, Brazil…) without paying the high TOB of VWCE.
- 88% IWDA (developed markets)
- 12% EMIM (iShares Core MSCI EM IMI, ISIN IE00BKM4GZ66) — emerging markets, TER 0.18%, TOB 0.12%
Global coverage equivalent to VWCE, but with a TOB of 0.12% instead of 1.32%. The downside: 2 transactions instead of 1, hence twice the brokerage fees. This becomes advantageous if you make few large buys rather than many small ones.
Model 3 — Allocation by horizon (with bonds)
The closer you are to your goal (retirement, property purchase), the more bond allocation should rise to dampen volatility.
| Horizon | Equity (global ETF) | Bonds | Profile |
|---|---|---|---|
| 30+ years (young saver) | 100% | 0% | Maximum growth |
| 15-25 years | 80-90% | 10-20% | Dynamic balanced |
| 10-15 years | 60-70% | 30-40% | Balanced |
| 5-10 years | 40-50% | 50-60% | Cautious |
| < 5 years | 0-20% | 80-100% + cash | Capital preservation |
For the bond allocation, two reference ETFs: AGGH (iShares Core Global Aggregate Bond EUR Hedged, ISIN IE00BDBRDM35) or EUNA (iShares Euro Aggregate Bond, ISIN IE0073IZBT0). Watch out: the 30% Reynders tax applies to the bond component on sale.
Rather than investing a large amount all at once, many Belgians invest a fixed amount every month (e.g. €200, €500 or €1,000). That's DCA. Benefits: you smooth your average purchase price, you avoid mistiming the market, and you build discipline. Trade Republic, MeDirect (via MeManaged plans) and some other brokers automate this.
How to buy your first ETF — step by step
The 7 pitfalls to avoid as a beginner
1. Buying a US-domiciled ETF (ISIN code "US…")
ETFs listed in New York (VOO, VTI, SPY…) have not been available to European investors since the PRIIPS directive in 2018. And even via a broker that would allow it, you'd pay 30% US withholding tax on dividends (vs 15% for an Irish fund). Always prefer ETFs with ISIN IE (Ireland) or LU (Luxembourg).
2. Forgetting the TOB at Trade Republic
Trade Republic does not withhold the TOB. You must calculate, declare and pay it yourself via MyMinFin by the end of the 2nd month following the transaction. Repeated forgetfulness = fines. Keep a spreadsheet if you use this broker.
3. Ignoring the NBB declaration of the foreign account
DEGIRO, Trade Republic, IBKR, MEXEM… Any account outside Belgium must be declared once at the Central Point of Contact (NBB), and yearly in the tax return. It takes 5 minutes but skipping it is sanctioned.
4. Confusing TER and TOB
The TER (Total Expense Ratio) is what the fund manager takes every year (0.12% to 0.25% generally). The TOB is what the Belgian state takes on every buy/sell (0.12% to 1.32%). Both matter.
5. Buying a distributing ETF by default
Many beginners buy VWRL (distributing) instead of VWCE (accumulating), or IWDA in distributing version (TIWD), because it shows up first. That's suboptimal in Belgium: you pay 30% withholding on every dividend. Always check "Acc" or "Capitalising" before buying.
6. Multiplying overlapping ETFs
Buying IWDA + an S&P 500 ETF + a European ETF + an MSCI World ETF is diversifying in appearance and concentrating in reality. You own Apple, Microsoft, Nestlé, etc. three times over. Keep 1 to 3 ETFs, not more.
7. Selling in panic during a crash
Over the long horizon, the worst enemy of returns is not taxation, it's the investor themselves. Selling everything after a 20% drop turns a fluctuation into a permanent loss. Build your allocation so you can hold even through a 40% crash.
Since 1 January 2026, selling your ETFs triggers the 10% capital gains tax above €10,000/year. If you plan to sell over multiple years (e.g. to prepare a property purchase), spread sales to use the exemption every year — a couple can realise €20,000 in gains per year tax-free. See our complete capital gains tax guide.
What next? Moving forward calmly
Once your first ETF is bought, the hardest work is done. The rest is discipline:
- Invest regularly — every month or every quarter, regardless of market level
- Rebalance once a year — if your equity/bond allocation drifts more than 5% from target
- Increase the invested amount with every salary raise
- Don't watch your portfolio value too often — once a quarter is plenty
- Keep an investing journal — especially in the early years, to understand your emotional biases
For 2026 taxation, two essential internal references: our complete guide on the capital gains tax, and our Savings & taxation hub to compare ETFs with other savings products (savings account, government bonds, pension savings).