Your accounting in Switzerland – personal, digital and on time.
You take care of your clients, we take care of your numbers: bookkeeping, annual accounts, VAT and payroll for SMEs, sole proprietors and freelancers. Get to know us – free of charge, without obligation and in English.
- Since 2012
- fiduciary in Winterthur
- Personal
- one contact person
- Digital
- send receipts with one click
- EN · DE · IT
- advice in three languages
The right accounting for your company.
A sole proprietorship needs something different from a GmbH with ten employees. We set up your accounting to fit your business – and grow with you.
Sole proprietors and freelancers
Simple, tax-compliant and paperless – so there are no surprises at year end.
Sole proprietorsGmbH and AG
Double-entry accounts, annual statements for the general meeting, VAT and taxes from a single source.
GmbH and AGChange accountant
Not happy with your current set-up? We take over your data and ensure a clean handover.
How switching worksEverything your numbers need.
You choose what we take on – from individual returns to complete accounting including payroll and taxes.
Bookkeeping
All receipts posted on an ongoing basis, bank and cash reconciled – your figures are always up to date.
Annual financial statements
Balance sheet, income statement and notes under Swiss law, including a closing meeting.
VAT
VAT returns filed on time and reconciled with the accounts – including VAT registration and deregistration.
Payroll and social security
Payslips, AHV, pension fund, withholding tax and salary certificates from a single source.
Receivables and payables
Open invoices under control, payments prepared, reminders on request.
Reporting and advice
Interim accounts and figures you understand – as a basis for your decisions and your taxes.
Four steps to accounting you no longer have to worry about.
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Get to know each other
In a free meeting – in Winterthur, by video or by phone – we discuss your company and your current set-up.
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Tailored quote
You receive a clear quote based on volume, number of receipts, payroll and VAT.
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Set-up
We set up your accounts, chart of accounts and interfaces and take over the data from your previous accountant.
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Ongoing support
You send receipts electronically; we post, file and close on time – with one fixed contact person.
ORSINI Treuhand AG in about a minute
A fiduciary firm in Winterthur handling accounting, payroll, taxes and company formations for businesses in Switzerland and abroad – personally and in three languages. (Video in German.)
Treuhandbüro in Winterthur: Was macht und wer ist die ORSINI Treuhand AG?
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Accounting that gives you time back.
One contact person
A dedicated specialist who knows your company – no hotline, no constant changes.
In Winterthur since 2012
Personally available at Pflanzschulstrasse 37 – or digitally when that is quicker.
English, German, Italian
Advice in three languages, with a long-standing focus on companies with links to Italy and Germany.
Everything in one place
Accounting, payroll, VAT and tax returns coordinated – no hand-offs between several firms.
Good to know about accounting in Switzerland
How much does accounting with ORSINI cost?
It mainly depends on the number of receipts, employees and VAT returns. That is why we do not quote a flat fee blindly: in the free introductory meeting we clarify your needs, then you receive a binding quote.
Does my company have to keep accounts?
A GmbH or AG must always keep full double-entry accounts. Sole proprietorships and partnerships only from CHF 500,000 turnover in the last financial year – below that, simplified records of income, expenses and assets are sufficient (Art. 957 CO).
How do I hand over my receipts?
The easiest way is electronically: as a scan or photo, by email or via a shared folder. You can also drop off paper receipts at our office in Winterthur. At the start we set up whatever works best for you.
Can I switch accountants during the year?
Yes. Switching at the start of a year or quarter is easiest, but it is possible at any time. We take over the data from your previous accountant and ensure a clean handover.
When does my company have to register for VAT?
As a rule, from CHF 100,000 annual turnover from taxable supplies. Voluntary registration can pay off, for example with large investments. We check this for you and handle registration and deregistration.
How long do I have to keep accounting records?
Books and vouchers for ten years (Art. 958f CO). Electronic storage is allowed as long as the records remain unaltered and readable.
Do you also work with small companies and sole proprietors?
Yes. We look after sole proprietors, small GmbHs and freelancers as well as larger SMEs. Clean accounts are especially worthwhile for small businesses because they feed directly into the tax return.
Do you work for companies from abroad?
Yes. We keep the accounts of Swiss companies and of foreign businesses with a subsidiary or branch in Switzerland – in English, German and Italian.
General information under Swiss law, as of 2026. It does not replace advice on your individual case.
Book a free introductory meeting
Tell us briefly about your company. We will contact you personally to arrange a meeting without obligation – at our office in Winterthur, by video or by phone. Afterwards you receive a clear quote.
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