Switzerland imposes Value Added Tax (VAT) at different rates as follows for various goods and services:
The standard VAT rate in Switzerland is applicable to all taxable goods and services, except when a specific measure allows for a reduced rate.
Hotel accommodation.
Food and drink (except that provided in hotels); agricultural supplies; water; printed materials; medicines; cultural and sporting events.
Exports; supplies of goods and services to airlines.
Sources: https://www.estv.admin.ch/estv/en/home/value-added-tax/vat-rates-switzerland.html
Art. 327a:
Source: https://www.fedlex.admin.ch/eli/cc/27/317_321_377/en
The mileage allowance that you can claim for the business use of your private vehicle amounts to CHF 0,70 per kilometer driven for business purposes and covers all costs such as fuel, repairs and insurance.
Touring Club Swiss (TCS) publishes a yearly overview of applicable rates based on the type of car. The average kilometre cost for 2025 is CHF 0,76 per kilometre.
Source: https://www.tcs.ch/de/testberichte-ratgeber/ratgeber/kontrollen-unterhalt/kilometerkosten.php
https://www.fedlex.admin.ch/eli/cc/27/317_321_377/en#art_327_b
The accounting records and the accounting vouchers may be retained on paper, electronically or in a comparable manner, provided that correspondence with the underlying business transactions and circumstances is guaranteed thereby and provided they can be made readable again at any time.
The accounting records must be kept and stored, and the supporting documents must be recorded and stored in such a way that they cannot be altered without such changes being detectable.
The following are permissible for the storage of documents:
a. Unalterable information carriers, namely paper, image carriers, and unalterable data storage media;
b. Alterable information carriers, provided that:
Technical processes are used that ensure the integrity of the stored information (e.g., digital signature methods),
The time of storage of the information can be proven to be tamper-proof (e.g., through a "timestamp"),
The applicable regulations in effect at the time of storage concerning the use of the relevant technical processes are complied with, and
The procedures and processes for their use are defined and documented, and the corresponding auxiliary information (such as logs and log files) is also retained.
Information carriers are considered alterable if the information stored on them can be changed or deleted without the change or deletion being detectable on the storage medium (such as magnetic tapes, magnetic or magneto-optical disks, hard or removable drives, solid-state storage).
Source: https://www.fedlex.admin.ch/eli/cc/27/317_321_377/en#part_4/tit_32/sec_1/lvl_C
https://www.fedlex.admin.ch/eli/cc/2002/216/de