An automatic allowance, and the threshold to beat

Mr Charrier declares 42 000 € of salary. The administration takes off 4 200 € without his asking. Electing actual expenses, he will deduct 7 603 € — but had he misjudged and evidenced only 3 900 €, the election would have cost him 300 € of extra taxable base. Before you read on: what threshold has to be beaten?

An allowance applied without being asked for

Article 83 of the tax code lays down a standard allowance for professional expenses, computed on gross income after deducting certain contributions, and set at 10 % of that income.

It applies automatically, with no step by the taxpayer. It covers commuting between home and work, meals taken at the workplace and spending on professional documentation.

Two bounds frame it. The amount cannot be less than 509 € per household member, without exceeding the gross amount of salaries. It is capped at 14 555 € for the taxation of pay received in 2025.

The ceiling is revised each year in the same proportion as the upper limit of the first band of the income tax scale. It is therefore not a fixed amount but an indexed one.

An election, and person by person

A taxpayer may give up the standard allowance to deduct actual expenses, provided these are evidenced. It is an election, made on the annual return, and it binds only the year for which it is made.

The most often overlooked point is its reach. The election is INDIVIDUAL: each household member chooses for themselves. A couple may therefore declare actual expenses for one and leave the other on the standard allowance, which is frequently the better arithmetic.

No mixing is possible within the same pay, however. One does not combine the allowance on part of the salary with actual expenses on the rest: the choice covers all of that person's income.

The trade-off therefore reduces to a single, checkable comparison: do evidenced expenses exceed 10 % of the salary? Below that, the election loses the difference; above it, the election gains it.

Evidence, and three years of keeping it

Actual expenses must have been genuinely borne during the tax year, be necessary to carry on the occupation, and be capable of being evidenced. The three conditions are cumulative; the absence of any one rules the spending out.

Supporting documents are not attached to the return. They must, however, be kept and held at the disposal of the tax authorities for three years, a period matching the administration's window to reassess.

The breakdown of expenses does go on the return itself, in a dedicated section. An election made without that breakdown risks rejection, and the taxpayer then falls back onto the allowance they had set aside.

One last reflex avoids an expensive error. Exempt expense reimbursements paid by the employer must be added back into taxable salary where the taxpayer elects actual expenses, failing which the same spending would be counted twice.

One case makes the trade-off obvious with no arithmetic at all: an employee whose employer already reimburses every journey. Their actual expenses are close to zero, and the 10 % allowance gives them a deduction they never bore.

Conversely, an employee covering long distances in their own car almost always clears the threshold. The mileage scale alone is often enough to pass 10 %, before the first meal is even counted.

Between the two, the only reliable method is to total a year of receipts before deciding. Intuition errs mostly in one direction: it overrates small costs and forgets to compare them with what the allowance already grants.