MathIsland
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▲%Progressive Tax Lab

Crossing a tax bracket never hurts you

Why does this exist?

'A raise means a tax bomb' is the most widespread money myth — brackets slice your income; they don't replace the rate.

🔬 The interactive lab is live — currently in Korean

Sliders and simulations speak every language. Most visitors can follow the experiment even without reading Korean — and a full English version of this lab is on the way.

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