firecalc

Starting balance (EUR)

What the portfolio is worth today, before this year's contributions.

Contribution per period (EUR)

Cash committed each period, before the stock-exchange tax is taken off the top. Only what is left over is invested.

How often you buy Monthly, 12 buys a year Yearly, 1 buy a year

Monthly buying pays the stock-exchange tax 12 times a year instead of once.

When the contribution lands End of the period Start of the period

End of period is the ordinary annuity. Start of period gives every contribution one extra period of growth: on yearly buys at 7% that is exactly 7% more at the end.

Contribution over time Same euro amount every year Raised each year by inflation

Fixed means 750 a month is still 750 a month in year 30. Raised means it climbs with the inflation rate below, holding its buying power.

Horizon (years)

How far to project. Year 0 is today; the chart runs to this year.

Target balance (EUR)

A balance you want to hit, 100000 for instance. Empty it to drop the target row.

Annual spend in retirement (EUR)

What the portfolio has to cover each year. 24000 is 2000 a month.

Withdrawal rate (% per year)

The FIRE number is annual spend divided by this rate: 24000 at 3,5% needs 685714. Bengen and the Trinity study put the range at 3 to 4, both from US data.

Expected return (% per year)

Nominal, before inflation. 7 is the long-run global-equity average; the next 30 years are not obliged to repeat it.

Inflation (% per year)

Used to deflate every figure to today's euros. The ECB targets 2; Belgian realised inflation has run a little above it.

Sub-annual compounding Effective rate Divide by 12

Effective turns 7% a year into 0,5654% a month and keeps the rate you typed. Dividing by 12 returns 7,229% a year instead, a gap of 1016,54 euro over a 10-year plan at 500 a month.

Stock-exchange tax, TOB (% per transaction)

0,12 for an accumulating fund not registered in Belgium, which covers most Irish-domiciled UCITS ETFs. 0,35 for individual shares. 1,32 for an accumulating fund registered here with the FSMA. Your fund's registration decides it, so it is typed in rather than guessed.

TOB cap per transaction (EUR)

1300, 1600 and 4000 for the three bands above, in that order.

Fund type Accumulating Distributing

An accumulating fund pays out nothing, so the dividend withholding line stays at zero.

Bond share of the fund (%)

Share held in debt claims. Past the threshold below, the Reynders tax applies to that share of the gain. A pure-equity ETF sits at 0.

Reynders rate, art. 19bis (%)

Charged on the bond part of the gain. 30 in 2026.

Reynders threshold (%)

Debt-claim share that switches the Reynders tax on. 10 in 2026.

Dividend withholding (%)

Withheld at source on any distribution. 30 in 2026.

Dividend reclaim tranche (EUR)

First slice of dividends you can claim back on your return. 859 for tax year 2026, reindexed every year.

Capital-gains tax (%)

Flat rate on realised gains, in force since 1 January 2026. 10.

Capital-gains exemption (EUR per year)

Per person, per year, before the 10% applies. 10000 in 2026, rising to 15000 with unused amounts carried forward.

Value on 31 December 2025 (EUR)

The step-up basis. Gain below this line is pre-2026 and stays untaxed. Leave it at 0 if the position started after that date.