Real expenses & working days calculator
Calculate in 2 minutes your real working days, professional mileage and deductible expenses. Compare with the 10% standard deduction and declare the right number on your tax return.
Your work rhythm
Telework days count as "worked" days but are deducted from your home-to-work commute.
Commute & vehicle
Distance over 40 km
The deduction is capped at 40 km (i.e. 80 km round-trip), unless you have a legitimate reason (spouse’s job, hardship, etc.).
Enter the exact rate matching your vehicle according to the official scale.
Replaces the mileage-based calculation entirely.
Add only if you keep all the receipts (do not add fuel).
10% standard deduction comparison
Required to compare the 10% automatic deduction with your real expenses.
Annual summary
Your real expenses are lower than the automatic deduction. Don’t declare anything extra on your tax return.
Audit trail & receipts
Save
Go deeper
Why calculate your real expenses before checking the box?
Every year, millions of employees leave hundreds of euros on the table by keeping the automatic 10% deduction when their actual professional expenses are far higher. On the flip side, some declare miscalculated real expenses and risk a tax adjustment. This tool gives you in 2 minutes a solid, defensible figure, calculated to the day.
The calculation relies on the official mileage scale published by URSSAF / the BOFiP, updated every year. It includes the specific rules: 40 km cap, 20% premium for 100% electric vehicles, exclusion of fuel when using the scale, and so on.
Interactive calendar
Visualise your real year: PTO, RTT, telework, sick days. No more rough "5 days × 52 weeks" estimates.
Up-to-date official scale
Car, motorcycle, moped, electric: every tier and bonus is built in and applied automatically.
10% comparator
An instant gauge tells you whether you should declare real expenses or keep the automatic deduction.
How many days do you really work?
The golden rule with the tax authorities is simple: you can only deduct what reflects the strict reality. Many taxpayers roughly declare 5 days × 52 weeks (260 days). It is one of the main causes of tax adjustments during an audit.
In reality, a standard full-time year with 5 weeks of PTO is around 210 to 218 working days. You need to remove weekends, public holidays, paid leave, RTT, sick leave and any unpaid absence. Our interactive calendar does this for you, day by day.
Concrete example for a typical employee
- 365 days a year
- − 104 weekend days, − 10 public holidays ≈ 251 working days
- − 25 PTO − 10 RTT − 3 sick days ≈ 213 actual working days
- − 90 telework days (2 d/wk) ≈ 123 commute days
Telework: the costly mistake
If you work from home 2 days a week, those days count as "worked" for your salary but generate no commute. The tax office requires them to be deducted from the mileage calculation. Our tool separates these two notions automatically to prevent any overstatement.
The 40 km rule
The tax authority considers that living more than 40 km away from work is a personal choice. By default, the deduction is capped at the first 40 km (i.e. 80 km round-trip per day). To deduct the full distance, you must justify a specific circumstance: failed local job search, spouse working in the same area, health condition, serious family constraints, etc. Keep any document proving it (job ads, certificates, correspondence).
What the scale includes (and what it doesn't)
Already included in the scale
- • Fuel (petrol, diesel, electricity)
- • Car insurance
- • Maintenance and repairs
- • Tyres
- • Vehicle depreciation
Add separately (with receipts)
- • Toll fees
- • Workplace parking
- • Vehicle loan interest (pro rata)
- • Annual garage rental
Keep your receipts for 3 years
The tax authority can ask you to prove your expenses up to 3 years after your declaration. The copyable summary from the tool acts as your audit trail: it gathers the key figures (working days, mileage, final amount) which you can archive together with tolls, parking receipts and vehicle registration.
FAQ
How does the tool calculate my working days?
The tool starts from the full calendar year (365 or 366 days) and automatically removes weekends and French public holidays (including Easter, Ascension and Pentecost). You then enter your PTO, RTT, sick days and telework days. The interactive calendar lets you place each absence month by month, or you can pick a preset profile (standard employee, 4-day week, hybrid). The result reflects your actual on-site working days.
Which mileage scale is used?
We use the official scale published in the BOFiP, 2026 version applicable to 2025 income. Three vehicle types are supported: car (3 to 7+ HP), motorcycle (1-2 / 3-5 / 5+ HP) and moped. A 20% automatic premium is applied if you check "100% electric". You can also enter a manual per-km rate or annual flat amount for atypical situations.
Can I combine the scale with my fuel receipts?
No. The official scale already covers fuel, insurance, maintenance, depreciation and tyres. You can only add toll fees and workplace parking on top, provided you keep the receipts. Combining both would be a double deduction and would jeopardise the entire claim during an audit.
I live more than 40 km from work, is the full distance deductible?
By default, the deduction is capped at the first 40 km (i.e. 80 km round-trip). To deduct more, you need a legitimate reason: no job available closer, spouse's job in the same area, health issue, serious family constraints, forced relocation, etc. Tick the option in the tool and keep all written evidence (job ads, certificates, correspondence) for at least 3 years.
How does the 10% deduction comparison work?
The 10% automatic deduction applies by default on your net taxable salary, with a floor of €509 and a ceiling of €14,555 (figures for 2025 income). The tool calculates this deduction from the income you enter, then compares it with your total real expenses (mileage + tolls + parking). If your real expenses are higher, declare them. Otherwise, do nothing: the standard deduction is better and is applied automatically.
What if I carpool?
If you use your own vehicle while carpooling, you can deduct your expenses with the standard scale — passengers don't change the calculation. If you contribute to another driver's expenses (BlaBlaCar Daily, neighbour, etc.), you can deduct the exact amount paid, with bank statements or invoices as proof. Keep records for 3 years either way.
Is my data stored online?
No. All inputs (calendar, distance, salary, etc.) stay in your browser through local storage. No figures are sent to any server. You can export a JSON backup to keep offline and reimport it next year or on another device. To clear your data, empty your browser cache or click "Reset the year".
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