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Anatomy of a payslip: what each line commits
The module’s worked examples, then cases to attempt before revealing their solution · 4 sections · 524 words · 6 min
Worked example
Léa's payslip from above
Gross: 2 600 €. Grouped employee contributions: about 542 €, of which 248 € of social contributions and 294 € of pension and protection cover. Net before tax: 2 058 €. Employer contributions shown separately: around 1 090 €, never deducted from the net but genuinely paid out.
Worked example
What Léa actually costs
Gross: 2 600 €. Employer contributions shown, relief deducted: about 1 090 €. Monthly cost: close to 3 690 €, or 44 300 € across the year. The 2 058 € she receives is 56 % of that spend — a ratio neither party guesses without the payslip.
Practical case
Karim's payslip: two figures, two uses
Karim's payslip shows six useful lines: base salary €2,400.00; total employee contributions €499.20; reimbursement of 50 % of his transport pass €37.50; employer's share of the health top-up €26.00; non-deductible CSG/CRDS €68.38; withholding tax €74.60. How much reaches his bank account, and how much will be pre-filled on his income tax return? Work out both figures before opening the solution.
Hint: Two of these lines travel in one direction only: one reaches the account without being taxable, the other is taxable without ever reaching the account.
Show the solution
Start from the net before tax, common to both figures: 2,400.00 − 499.20 = €1,900.80. For the bank account, subtract the withholding tax and add the transport reimbursement, which is neither pay nor taxable income: 1,900.80 − 74.60 + 37.50 = €1,863.70. For the tax return, start again from the same net before tax, then add back the non-deductible share of social contributions and the employer's health top-up share, a taxable benefit: 1,900.80 + 68.38 + 26.00 = €1,995.18. The transport reimbursement enters neither addition; the employer's top-up share enters neither subtraction. That asymmetry, not a rate, explains the €131.48 gap between the two figures.
Answer: Net paid €1,863.70; taxable net €1,995.18.
Practical case
June's year-to-date totals do not add up
At the end of June, Léa's payslip shows her totals since January: gross to date €15,600, taxable net to date €12,400, withholding tax to date €550. Her current month is the one you know: €2,600 gross and €2,132.23 of taxable net. Only one of those three totals is inconsistent. Which one, and by how much?
Hint: A running total is checked without recalculating anything: multiply the current month by the number of months elapsed, then compare.
Show the solution
Six months have passed. The expected gross to date is 6 × 2,600 = €15,600: that one is right, the salary has not moved. The expected taxable net to date is 6 × 2,132.23 = €12,793.38, whereas the payslip shows 12,400: €393.38 is missing, roughly a fifth of a month. The withholding tax total cannot be checked that way — the rate may have changed during the year, and a gap there is normal. So the anomaly sits on the only total whose check is legitimate. It counts twice over: December's cumulative taxable net is exactly what will be pre-filled on the tax return, and a base understated by €393 is far easier to fix in June than after the return has been filed.
Answer: The taxable net to date, €393.38 below six times the current month.
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