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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryFinance & InsuranceFiduciary OfficesRheinfeldenZumstein Treuhand
Zumstein Treuhand Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of "Zumstein Treuhand" is the provision of services in the areas of corporate consulting, accounting, and administration. Specifically, this includes: accounting with EDV for SMEs, company valuations, corporate restructuring, creation of business plans, contract management (creation of contracts such as loan and credit agreements, franchise agreements, etc.), personnel administration (payroll and salary calculations), and corporate consulting (advice on company formations, liquidations, changes in the board of directors, etc.). The company thus offers a comprehensive range of services for businesses to support them in their administration, accounting, and strategic decision-making.

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Products & services

Industry:Fiduciary Offices
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Zumstein Treuhand

12
IT-supported bookkeeping
Client bookkeeping for SMEs, periodic interim financial statements, annual financial statements, and subsidiary ledgers for wages/salaries, debtors, and creditors.
Tax returns and tax consulting
Tax returns for self-employed persons, employees and pensioners, tax planning and optimisation, review of assessments, as well as objections and special tax returns.
VAT returns
Preparation of VAT returns on a semi-annual or quarterly basis, using the Saldosteuersatz (flat-rate) or the effective method.
Company formations and liquidations
Formation of joint-stock companies (AG), GmbHs, cooperatives and articles of association/partnership agreements, as well as advice on amendments and liquidations.
Business plans
Creation of business plans with forecast figures, financial plan, projected balance sheet, projected profit-and-loss statement, and other analyses.
Business valuations
Valuation of companies using various methods, for example in connection with a sale or another transaction.
Company restructurings
Restructuring advice and measures for an underbalance (Unterbilanz), judicial or out-of-court composition (Nachlass), and mandates for the court-appointed trustee (Sachwalter).
Estate divisions and will executorships
Estate divisions, will executorships, and inheritance-law advice, including support in drafting a will.
Contract drafting
Preparation of contracts that do not require public notarisation, such as credit, loan, franchise, lease and shareholder lock-up agreements.
Personnel and payroll administration
Payroll and salary statements, insurance reporting, withholding tax statements, pay certificates, as well as recruitment and employment contracts.
Property management
Property management including rental collection, contracts, heating cost and operating expense statements, as well as budgeting and accounting for condominium associations (stockwerkeigentümer).
Debt collection under the DEBA (SchKG)
Debt collection with reminders, debt enforcement proceedings, removal of an objection (Rechtsvorschlag), action before the justice of the peace or court action, and continuation of enforcement proceedings.
Trust & reputation

ranQ Trust Score of Zumstein Treuhand: 3.7 out of 5.0

Trust Score3.7/ 5.0

Solid

x

Data basis 96% · As of October 2026

Zumstein Treuhand scores 49.8 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.68.224%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.17.610%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.35.08%
Zumstein Treuhand scores 78.5 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
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%
Zumstein Treuhand scores 83.3 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
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%
Zumstein Treuhand scores 0.0 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
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%
Qualifications+0.00

Zumstein Treuhand reaches a ranQ Trust Score of 3.7 out of 5.0 — rated «Solid». The rating draws, among other things, on 5.0 out of 5 stars from 1 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of October 2026.

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

Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 1 reviews across all connected sources

Sources
GGoogle51
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

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Location

Gartenweg 36
4310 Rheinfelden

At a glance

Legal form
Sole proprietorship
UID
CHE-107.952.830
Founded
1978 · 48 years
Last commercial register change
January 30, 2026
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.
67.0
6%
  • 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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