Compound interest after tax: gross vs net
The projection you see in most calculators is gross: the tax office never shows up. Enter your capital-gains rate and compare both curves — the gap between them is what never reaches your pocket.
Deferral: the money compounds gross and you pay once when you sell. This is the case for an ETF or a stock you hold.
Final value after tax
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Final value before tax
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Total tax cost
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Total contributed
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Equivalent net return
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And inside the app…
The app's tax module does this on your real data: it applies the AEAT savings brackets, offsets losses and estimates your tax bill before you sell.
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