Per diems and allowances

Per-diems are an excellent fiscal lever… when used wisely.
As a self-employed person, you can also claim additional expenses for meals on a business trip as a lump sum, just like employees:
– for an absence of 8 to 24 hours from the first place of work 14 Euro
– if you are absent for more than 24 hours, 28 euros can be claimed

If you bill for exactly eight hours, you get nothing. The journey must last more than eight hours, for example eight hours and eight minutes.