Flat tax vs scaleFree · 2 minutes

French box 2OP simulator

Compare the French flat tax with progressive income tax on dividends, interest and capital gains using the 2026 brackets.

Household and investment income

Box 2OP is a global election. Include all eligible dividends, interest and securities gains for the household.

The model applies the standard 40% allowance under the progressive scale.

2026 comparison

The flat tax appears lower

Use the official DGFiP simulator before selecting box 2OP.

Flat tax

€1,727.00

31.4% model

Box 2OP

€2,433.00

Incremental income tax + social levies

Investment income under review€5,500.00
Taxable amount under scale€4,700.00
Incremental progressive income tax€1,410.00
Estimated difference€706.00

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French box 2OP simulator: flat tax or progressive rates? | FlashFiscal