Melanie Giang
Co-founder
Swiss Certified Accountant (eidg. dipl. Wirtschaftsprüferin), licensed audit expert (RAB)

About our accounting firm in Dübendorf
Onaccounting AG is your accounting firm in Dübendorf: bookkeeping, payroll, taxes and audit for owner-managed Swiss SMEs. Digitally organised, personally looked after.

Personally at your side
Three people, an office dog and some digital reinforcement. You know the people who look after your accounting.
Co-founder
Swiss Certified Accountant (eidg. dipl. Wirtschaftsprüferin), licensed audit expert (RAB)

Co-founder
Business Economist HF (dipl. Betriebswirtschafter HF)

Accounting & Payroll
Finance and accounting specialist (Sachbearbeiterin Finanz- und Rechnungswesen)

AI on the team
Many arms for the routine work. We double-check.

AI illustration
Chief Happiness Officer
Office dog with a nose for good closings. And treats.

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AI works alongside us so that more time is left for your questions. Professional judgement and personal contact stay with our team.
How it came about
Melanie Giang worked as a Swiss Certified Accountant (eidg. dipl. Wirtschaftsprüferin) at one of the four large international audit firms and knows what a set of accounts looks like that stands up to an audit. Silvio Börlin comes from industry and knows the other side: the owner who sorts receipts on a Friday evening because there was no time during the week.
Onaccounting AG grew out of these two perspectives in the summer of 2023. Professionally at the level an audit demands, and in our dealings the way an owner would wish: reachable, clear and without an invoice for every query.
What we do is therefore not ‘offering bookkeeping’, but taking over your finance administration: receipts, payroll, VAT, payments, closing and taxes. We do not just solve today’s task; we build processes that will still hold up in two years. And if we are not the right people for an engagement, we would rather say so in the initial meeting.

How we work
Four commitments that can be checked. If we do not keep them, it shows, and that is exactly why they are written here and not only mentioned in the initial meeting.
You have one person who knows your engagement, and a named deputy. No ticket system, no changing clerks, no starting again from scratch when someone is on holiday.
We tell you the amount before we start, and what it covers. If something comes up that was not agreed, we ask first. Nobody receives an invoice from us that they did not expect.
Receipts arrive digitally, the accounts run in the cloud, and you can see the reports yourself. Even so, we are based at Kriesbachstrasse, and you can drop by. One does not rule out the other.
If your bookkeeping is behind, if bexio would be the wrong choice for your business, if we are not the right people for an engagement, you will hear it from us. Better in the initial meeting than in the second year.
Trust
We handle your figures and your data with care. What is with us stays with us.
Quality
As a licensed audit expert, we audit according to the Swiss standard for the limited audit (eingeschränkte Revision, SER) and the Swiss Standards on Auditing (SA-CH). We apply the same standard to our accounting engagements.
Regional ties
We are at home in Dübendorf and look after businesses from the Zurich Oberland and the Zurich region.
Reliability
We comply with legal requirements and deadlines. When you have a question, you get an answer, not a queue.
Client reviews
Genuine Google reviews
4.9 out of 5 from 26 Google reviews, as of 10 October 2026
Reviews in German, as published on Google.
Platinum and implementation partner
bexio’s highest partner level, which comes with ongoing certification. Listed in the official directory of accounting firms.
Platinum partnerListed in bexio’s directory of accounting firmsRAB505484Licensed audit expertIn the register of the Federal Audit Oversight Authority (RAB)Both entries are public. One click is enough to check them.
Location
Dübendorf combines the advantages of a growing town with its closeness to Zurich. Short distances, good transport links and surroundings that are home to many of the businesses we look after.
We work digitally, but not anonymously. If you would rather come by in person: there is parking, and public transport stops nearby. Just arrange an appointment beforehand, and we will take our time.

The initial meeting
The initial meeting is free and without obligation. Together we look at where your business loses time today and which of that work we can take on. Afterwards, you know where you stand.
Who would you like to talk to?
30 minutes, without obligation, by video or at our office in Dübendorf. Both of them hold the initial meeting personally.
Prefer email? info@onaccounting.ch
Questions and answers
A dedicated person from the team, whom we name in the initial meeting, with a deputy who is also named. For questions about audits or the closing, Melanie Giang joins in. She is a Swiss Certified Accountant (eidg. dipl. Wirtschaftsprüferin) and a licensed audit expert. For anything to do with processes in your business, it is usually Silvio Börlin, who comes from industry and knows what an SME looks like from the inside.
Then your deputy, who is named from the start and knows your engagement, takes over. Deadlines run regardless of our holiday schedule, and that is also why we do not run one-person engagements.
We work digitally because it is faster and less prone to errors, not because we dislike paper. You can photograph receipts, email them or drop them off in a pile. For meetings, we are available by video, by phone or at our office in Dübendorf. We come to your premises when something can only be resolved on site. Keeping that the exception is what keeps the fixed price stable.
Gladly, but please let us know briefly beforehand. Then the person who knows your engagement will be there, and we will have time for you instead of fitting you in between two appointments. Parking is available, and public transport stops nearby.
No. We decline when we realise that we are not the right people, for example when someone is mainly looking for the lowest-priced provider, or when a business has requirements that we cannot serve properly. That is more honest for both sides than an engagement that ends again after a year.
Onaccounting AG was founded in the summer of 2023 out of two perspectives on the same set of accounts. Melanie Giang worked as a Swiss Certified Accountant at one of the four large international audit firms and knows what a set of accounts looks like that stands up to an audit. Silvio Börlin comes from industry and knows the other side: the owner who sorts receipts on a Friday evening because there was no time during the week. That is why we work professionally at the level an audit demands, and in our dealings the way an owner would wish: reachable, clear and without an invoice for every query.
Melanie Giang is a Swiss Certified Accountant (eidg. dipl. Wirtschaftsprüferin) and a licensed audit expert, Silvio Börlin is a Business Economist HF (dipl. Betriebswirtschafter HF). Emilia is a finance and accounting specialist (Sachbearbeiterin Finanz- und Rechnungswesen) and has many years of experience in independently running financial accounting and payroll, closings and VAT returns.
Yes. Onaccounting AG is licensed by the Federal Audit Oversight Authority (Eidgenössische Revisionsaufsichtsbehörde), RAB no. 505484, and the audit is led by Melanie Giang as licensed audit expert. However, we only audit companies whose accounts we do not keep. If we keep yours, we refer you to an independent statutory auditor (Revisionsstelle).
We are at home in Dübendorf, and many engagements come from Zurich and the Zurich Oberland. But we can look after you from anywhere in Switzerland, because receipts and reports are handled digitally. For meetings, we are available by video, by phone or at our office in Dübendorf.
Yes. We are growing and are looking for a client manager (Mandatsleiterin or Mandatsleiter), including at junior level, who enjoys working with figures and with clients. Please send your application to info@onaccounting.ch.