Understand · Banking Products
What your bank offers you — and what it doesn't always tell you.
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Banking products are not all bad. Some fulfill a useful function. But understanding exactly how they work — their real fees, their taxation, their constraints — is essential for making an informed decision.
The Belgian savings account works with two components: a base rate (paid from the first day) and a fidelity premium (acquired only if the capital remains on the account for 12 consecutive months).
The fidelity premium is a behavioural mechanism: it penalises unforeseen withdrawals and secures low-cost financing for the bank. If you withdraw before 12 months, you lose the premium on the amount withdrawn.
Tax advantage
The first €1,020 of annual interest per person (amount for 2026 income, indexed annually) is exempt from withholding tax. Beyond that, each additional euro of interest is taxed at 15% — and not 30% like other mobile income: this is one of the rare tax advantages of the regulated savings account.
Verdict
The savings account has a precise and legitimate function: your emergency fund (3 to 6 months of expenses), available at any time without risk of capital loss.
For this function, it is irreplaceable. For everything else — medium or long-term savings — every year spent in a savings account is a year where your purchasing power stagnates or retreats against inflation.
These products lock your capital for a fixed duration (1 to 10 years) in exchange for a guaranteed rate. The certainty of the return is paid for in two ways:
Total absence of tax exemption
Unlike the savings account, all interest is subject to 30% withholding tax from the first cent. A displayed gross rate of 3.10% becomes 2.17% net.
Capital lock-up
Early withdrawal is generally impossible or penalised. Your capital is locked until the contractual maturity.
Verdict
In almost all cases, a savings bond or term account is inferior to a simpler alternative.
After the 30% withholding tax, a 3.10% gross rate becomes 2.17% net — all while locking your capital. A money market ETF like XEON offers a return close to the ECB policy rate — generally higher than the best term accounts after tax, while remaining totally liquid and without triggering annual withholding tax.
The only argument for a savings bond would be not wanting to open an account with a broker. In this case, a high-rate savings account (vdk Rythme, Belfius Flow) remains more flexible for the same risk profile.
Branch 21 is technically a life insurance contract offered by insurance companies, not a bank deposit — even if banks commonly distribute it. It offers a guaranteed interest rate, supplemented by a possible non-guaranteed profit sharing. Its taxation is specific:
The 8-year rule trap: a product presented as 'secure' actually locks your capital for 8 years to be tax-optimal. And the 2% tax on each premium immediately reduces your invested capital.
Concrete example
Out of €10,000 paid, only €9,800 is invested (after 2% tax). At a guaranteed rate of 2.50%, it takes about a year just to recover this initial tax.
Verdict
Branch 21 is structurally disadvantageous for the ordinary investor:
On a short horizon (<8 years), XEON is more profitable and liquid. On a long horizon (>8 years), an equity ETF structurally surpasses this guaranteed return.
Branch 21 wins on no horizon for an investor who accepts using a broker.
Pension savings appeal through their immediate tax advantage, available in two options:
Standard option
Up to €1,050/year paid → 30% tax reduction → up to €315 recovered.
Increased option
Up to €1,350/year paid → 25% tax reduction → up to €337 recovered.
Tipping point: the increased option only becomes advantageous from €1,260/year in payments. Below this, the standard option is preferable.
But three elements temper this enthusiasm:
Fees — the silent enemy
Belgian pension savings funds show TERs of 1.25% to 1.50%, to which are added entry fees of 0% to 3% depending on the institution. Over 30 years, these fees can erase a significant part of the initial tax advantage.
The exit tax — on a fictitious capital
At age 60, the state levies an anticipatory tax of 8% — not on your real capital, but on a fictitious capital calculated as if your fund (branch 23) had earned 4.75% per year from the start. This fictitious calculation applies to branch 23 pension savings funds only; branch 21 follows a different mechanism. If your fund underperformed the 4.75% threshold, your effective tax rate on the real return increases considerably.
Lock-up until age 60
Capital is locked until age 60. Early withdrawal triggers taxation at the personal income tax (PIT) rate of 33%, to which are added municipal surcharges — this is not a withholding tax, but a final tax that can exceed 35% depending on the municipality of residence.
Verdict
The 30% tax advantage seems considerable — but it is a one-time bonus, paid once a year, that does not compound.
Meanwhile, the performance gap between the pension fund (~4%) and an ETF (~8%) compounds every year for decades.
Our simulator demonstrates it concretely: over 30 years at €87.50/month (tax ceiling), an All-in-one ETF surpasses Argenta pension savings from the 11th year — and ends with €33,000 more at 30 years, despite the best fund on the market (0% entry fees) and the maximum tax advantage.
Added to this: capital locked until 60, an exit tax of 8%, and annual management fees of 1.25% to 1.50%.
Our conclusion: pension savings are not an investment strategy — they are a tax product that structurally underperforms over the long term. Keep your capital free and invest it in an ETF.
Active mutual funds are the most lucrative product for banks — and often the least advantageous for the investor.
Their economic model relies on retrocessions: the management company levies a TER of 1.50% to 2.50%, part of which is paid back to the distributing bank to remunerate its commercial effort. MiFID II (2018) imposed more transparency — banks must now publish a KID/DICI document mentioning total costs — and banned retrocessions for independent advisors. But traditional banking networks, which operate as tied distributors, can still receive these commissions. In practice, the network client remains exposed to a structural selection bias: recommended funds are those that generate the most retrocessions, not necessarily those that offer the best net return for the investor.
« Over 20 years, between 85% and 92% of active funds underperform their benchmark index after fees. This is not a question of incompetence — it is a mathematical reality linked to the cost of active management. »
Verdict
There is no general case where a bank active fund is the best choice for a long-term investor.
Between 85% and 92% of active funds underperform their benchmark index over 20 years, after fees. This is not an opinion — it is the documented result of decades of academic studies and Morningstar data.
An ETF with 0.17% TER versus an active fund at 1.73%: the difference seems small. Over 30 years, it often represents more than 30% of the final capital.
Want to see the real impact of fees on your situation?
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Last updated: March 2026