+41 44 518 86 00
info@adminster.ch

Accounting & back office for startups

You have a startup - we take care of the rest.

Complete outsourcing made easy!

Whether it's financial accounting, taxes or social insurance: We offer you a full-service package that handles your back office efficiently and stress-free so that you can concentrate fully on your growth.

Book your appointment

Why we are the perfect solution for your startup:

  1. Everything from a single source - from accounting to back office
    With us, you have full support: from financial accounting and tax optimization to social insurance and back office management - we take care of everything.
  2. Digital tools that make the difference
    Thanks to the smart accounting tools Accounto and Bexio, you always have an overview. Your finances can be viewed in real time and everything is processed digitally and automatically.
  3. Full flexibility
    Is your startup growing? No problem. We scale our services with your company - flexibly, efficiently and always up to date.
  4. Full outsourcing for your back office
    We take over your entire back office, including personnel administration and social security, so that you can focus fully on your core competencies.

Your advantages

  1. Time saving
    1. We take care of the paperwork, you focus on your core business.
  2. Cost efficiency
    1. With our digital tools, you avoid unnecessary costs and create a structured, scalable solution.
  3. Transparency
    1. Real-time data and reports via Bexio and Accounto give you a clear overview of your finances at all times.
  4. Reliability
    1. You can rest assured that your accounting and taxes are in the best hands.

How does it work?

Your advantages

at a glance

  • Time saving:
    • We take care of the paperwork, you focus on your core business.
  • Cost efficiency:
    • With our digital tools, you avoid unnecessary costs and create a structured, scalable solution.
  • Transparency:
    • Real-time data and reports via Bexio and Accounto give you a clear overview of your finances at all times.
  • Reliability:
    • You can rest assured that your accounting and taxes are in the best hands.

Get started now!

Let us be your partner and make your back office as efficient and simple as possible. Write to us or give us a call to find out more!

Do you have any questions?
+41 44 518 86 00

We look forward to receiving your email
info@adminster.ch

adminster ag
Forchstrasse 60
8008 Zurich

adminster fiduciary gmbh
Baarerstrasse 94
6300 Zug

what customers say about us

"With humor and joy!"

I founded my company with adminster.
I am very satisfied!
Will now continue to work with them.

M
Michael Dettwiler

adminster then gave us a helping hand with their expertise and ensured that we no longer just had the right turnover, but that our accounting was also in line with legal requirements.

If you are looking for a partner in the area of finance and accounting who can ensure that everything in this area is as it should be in an uncomplicated and independent manner, then adminster is an ideal partner.

H
Hans Geeler

Very professional and reliable service. The adminster team works quickly and precisely and offers expert advice. We have been working with them since the beginning and have been able to see how a start-up has become a really great SME. I am very satisfied with the collaboration and can recommend the service without reservation!

M
Marco Licini

We have been working with adminster since this year and are surprised by the good quality. By quality we mean digital processes, direct communication and excellent advice at a fair price. Absolutely top!

P
Physio Schenk

Professional support in all areas with extremely friendly people. I can recommend adminster fiduciary who wants straightforward, competent, and reliable support.

M
Madleina Speich

I have been working with adminster for years and am completely satisfied. Whether accounting, payroll administration, taxes or business consulting - I always receive competent, fast and reliable support. The collaboration is personal, professional and solution-oriented. For me, they are the first port of call for all financial and administrative matters. Highly recommended!

S
Sat To

We have been working with adminster for over 1.5 years now. They do most of the bookkeeping for us. The cooperation with Simon and his team is very competent, reliable and on an equal footing. We are very satisfied!

J
Jesse Gerner

I've been working with Simon and his team for almost 3 years now. It has been a pleasant experience all the way. As a lean start-up, we try to do the maximum by our own (As it is the cheapest). Simon supported us in this effort and never gave me the feeling of being a complete newbie (despite making many and repetitive mistakes). I recommended Simon already to multiple other start-ups and companies and had great feedback from them as well.

C
Charly Stahl
Tired of bookkeeping?
We have an idea!
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Between Christmas and New Year, from 24.12-4.1.2026 we take a break and can only be reached in emergencies at info@adminster.ch.
Do you have any questions?
+41 44 518 86 00
We look forward to receiving your email
info@adminster.ch
Book your appointment
Zurich location
adminster ag
Forchstrasse 60
8008 Zurich
Location Zug
adminster fiduciary gmbh
Baarerstrasse 94
6300 Zug
Address
adminster ag
Forchstrasse 60
8008 Zurich
Second office
adminster treuhand gmbh
Oberallmendstrasse 18
6300 Zug
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