Every year, the income tax declaration features dozens of pre-filled boxes in the section for capital income. Among them, box 2BH often goes unnoticed, even though it directly affects the amount of deductible CSG from your tax. Understanding its role helps avoid losing a tax advantage or triggering an inconsistency with the administration.
Check the IFU before validating box 2BH on the declaration
Before even looking at form 2042, open the unique tax form (IFU) provided by your bank or broker. This document summarizes all the capital income received during the year: dividends, interest from term accounts, bond coupons.
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Box 2BH is included with a specific amount. This amount corresponds to the income already subject to social contributions with deductible CSG. In practice, your financial institution has already deducted social contributions from this income over time.
The online declaration automatically includes this figure in the pre-filled box. The trap lies here: the pre-filled amount may differ from that of the IFU. A discrepancy sometimes occurs when you hold multiple accounts in different institutions, or when a partial redemption of life insurance has been miscategorized. To know precisely what box 2BH is for and to avoid common pitfalls, this detailed guide is worth a look.
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Compare line by line. If the IFU indicates one amount and the declaration shows a different figure, correct it manually before validation. An error in reporting on 2BH skews the calculation of the deductible CSG for the current year, but also potentially for the following year.
Box 2BH and the option for the progressive scale: the link with box 2OP
Box 2BH has no tax effect if you remain under the flat tax (PFU). You may have heard of the flat tax at 30%: it combines 12.8% income tax and 17.2% social contributions. Under this regime, the CSG is not deductible. Thus, box 2BH has no consequence on your taxation.
The deduction of CSG only activates if you check box 2OP, which triggers taxation under the progressive scale for all your capital income and capital gains.
By checking 2OP, you waive the PFU. Your dividends and interest join your other income to be taxed according to your marginal rate. In return, a portion of the CSG already paid (the rate of 6.8%) becomes deductible from your overall income. It is this portion that box 2BH allows you to calculate.
Are you hesitating between PFU and the scale? The answer depends on your marginal tax rate:
- If your marginal rate is lower than the flat rate of 12.8%, the progressive scale with CSG deduction via box 2BH reduces your tax bill.
- If your marginal rate exceeds this threshold, the PFU generally remains more advantageous, and box 2BH does not come into play.
- If you receive dividends, the 40% allowance (boxes 2DC/2FU) adds to the scale and may shift the interest in favor of box 2OP, even with an intermediate marginal rate.
A point often overlooked: if you checked 2OP the previous year, the box is automatically pre-checked for the following declaration. Without action on your part, you remain under the scale. Check each year that this option still corresponds to your situation.
Capital income concerned by box 2BH
Not all income listed in section 2 ends up in box 2BH. Only those that have actually been subject to social contributions with a portion of deductible CSG are included.
In practice, the most common incomes in this box are:
- Dividends from French and European stocks paid into a standard securities account.
- Interest from term accounts, taxed PELs, and non-exempt bank savings accounts.
- Income from bonds and negotiable debt securities.
Interest from regulated savings accounts (Livret A, LDDS) never appears in 2BH as they are exempt. Gains from a PEA over five years are also not included: they escape income tax and follow a different route for social contributions.
Life insurance products have their own logic. Redemptions from contracts over eight years feed into boxes 2DH or 2CH depending on their payment date, not directly into 2BH. Do not mix these lines: each box corresponds to a distinct tax regime.
Case of foreign income
If you receive dividends from foreign companies through a French broker, social contributions are generally withheld at source, and the amount appears on the IFU. The reporting in 2BH follows the same logic. However, if social contributions were not withheld (foreign broker without a convention), box 2BH should not be filled for these incomes: they will be subject to social contributions during the tax settlement.
Common mistakes regarding box 2BH and how to correct them
The most common mistake is to modify box 2BH without touching box 2OP. You fill in an amount in 2BH while remaining under the PFU: the deduction does not apply, and the administration may follow up with you for inconsistency.
Another trap: adding amounts from several IFUs yourself instead of checking that the pre-filled declaration has already consolidated them. The duplicate artificially inflates the deductible CSG and triggers an automatic check.
If you spot an error after validation, the online correction service remains accessible for several weeks after the deadline. Correct box 2BH and box 2OP together so that the calculation remains consistent. The administration will then automatically recalculate the amount of deductible CSG.
Box 2BH concerns only a specific mechanism, but its impact reverberates on the overall taxable income as soon as you opt for the scale. Take a few minutes to cross-check your IFU with the pre-filled declaration: it is the most profitable gesture of your tax declaration.