Sole proprietorship accounting in Switzerland (2026): simplified log or double entry?
How to keep the books for a sole proprietorship in 2026: simplified log or double entry, CHF 100,000/500,000 thresholds, AHV, VAT and private withdrawals.
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Swiss businesses should create the full QR-bill, one document covering the line items, invoice number, VAT details per Art. 26 VAT Act, and the payment part with the Swiss QR code, rather than a bare QR payment slip. The slip carries only the payment data: enough to get paid, but not an invoice for your client’s books or your own.
How to keep the books for a sole proprietorship in 2026: simplified log or double entry, CHF 100,000/500,000 thresholds, AHV, VAT and private withdrawals.
In Switzerland you may start debt enforcement (Betreibung) against a non-paying client without sending any reminder (Art. 67 DEBA / SchKG). A reminder still matters: unless a calendar due date was agreed with the client beforehand, it is the reminder that puts the client in default (Verzug) and starts 5% default interest (Art. 102 and 104 CO / OR), and it is your dated proof if the debtor later objects
From day one, a Swiss GmbH keeps double-entry books and produces yearly statutory accounts (balance sheet, income statement and the notes), as Art. 957 ff. of the Code of Obligations (OR) prescribes; shareholders then have six months after the year closes to approve them.
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