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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryFinance & InsuranceFiduciary OfficesMännedorfErwin Koller Wirtschaftsprüfung & Wirtschaftsberatung
Erwin Koller Wirtschaftsprüfung & Wirtschaftsberatung Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of the company "Erwin Koller Wirtschaftsprüfung & Wirtschaftsberatung" is the provision of services in the field of auditing and business consulting, particularly for financial institutions, non-financial sector companies, as well as retail chains, processing industries, hospitality, travel organizations, and service companies. The specific activities include: Auditing and business consulting, Auditing of banks, securities dealers, and pension funds, Regulatory support and IKS for the establishment, mergers, reorganizations, etc. of banks/securities dealers and pension funds, Expert auditing activities at the Revision Supervisory Authority (RAB), Recognized audit manager at the VSV Association of Swiss Asset Managers. The company thus offers a comprehensive range of services in the field of auditing and business consulting, with a focus on financial institutions and companies from various industries.

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Products & services

Industry:Fiduciary Offices
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Erwin Koller Wirtschaftsprüfung & Wirtschaftsberatung

✓ Offered5
Financial audit / Statutory audit
Financial audit and statutory audit for financial companies, pension funds, foundations and SMEs; personal management and performance of audit mandates.
Business consulting
Business consulting for financial companies, pension funds, foundations and SMEs; advice focused on operational and financial matters.
Support in accounting, risk control and the internal control system
Support in accounting, risk control and the internal control system for financial companies, pension funds, foundations and SMEs.
Mandates as board of directors member or foundation board member
Assumption of mandates as member of the board of directors or foundation board for companies and foundations.
Chairing / serving on the Audit Committee
Chairing or serving on the Audit Committee, or on the audit and risk committee.
Trust & reputation

ranQ Trust Score of Erwin Koller Wirtschaftsprüfung & Wirtschaftsberatung

Trust Score

No score yet

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A published score requires a data basis of at least 50% and data from at least two criteria groups other than identity. Missing evidence: Review quality, Review volume, Review recency, Media authority

Data basis 54% · As of October 2026

Erwin Koller Wirtschaftsprüfung & Wirtschaftsberatung has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
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CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Erwin Koller Wirtschaftsprüfung & Wirtschaftsberatung scores 78.5 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.55.07%
Erwin Koller Wirtschaftsprüfung & Wirtschaftsberatung scores 83.3 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).83.322%
Erwin Koller Wirtschaftsprüfung & Wirtschaftsberatung scores 0.0 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.0.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%

The data basis is 54%, below the threshold at which ranQ publishes a score. Evidence is missing for: Review quality, Review volume, Review recency, Media authority. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

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Location

Leisibüelstrasse 32
8708 Männedorf

At a glance

Legal form
Sole proprietorship
UID
CHE-112.471.915
Founded
2005 · 21 years
Last commercial register change
August 11, 2005
Employees
1 to 10
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.67.06%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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