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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryFinance & InsuranceFiduciary OfficesUsterMellarius Treuhand AG
Mellarius Treuhand AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Mellarius Treuhand AG and Mellarius Immobilien AG encompasses a wide range of services, including: Financial and accounting services (e.g. accounting, annual financial statements, payroll accounting); Tax consulting (e.g. tax returns, tax planning, VAT declarations); Personnel administration; Corporate consulting (e.g. company formation, conversion, restructuring, succession planning); Inheritance and law (e.g. advice on inheritance law, last will and testament, advance care directive); Real estate (e.g. marketing and brokerage of real estate, management of rental properties, creation of rental agreements); Software (e.g. knowledge of various accounting products). The company thus offers a comprehensive range of services for companies and private individuals, focusing on the areas of finance, taxes, personnel, law and real estate.

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Offering

Products & services

Industry:Fiduciary Offices
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4.2/5

Mellarius Treuhand AG

✓ Offered7
Finance & Accounting
Bookkeeping, annual and interim financial statements, payroll accounting, accounts receivable and accounts payable, budgeting, liquidity and financial planning, payment processing, digitisation in accounting.
Taxes
Tax returns for individuals and legal entities, tax advice, tax planning and tax optimisation, VAT declarations, real estate capital gains tax, representation in assessment and appeal procedures.
HR Administration / Payroll
Payroll accounting, payslips, wage statements, social insurance declarations, withholding tax and allowance forms, employment contracts, expense regulations, support with labour law matters.
Business Consulting
Company incorporation, conversion, restructuring and liquidation, succession planning, business valuation, advice on buying and selling companies, due diligence.
Inheritance Matters & Law
Advice on inheritance law and matrimonial property law, wills, precautionary mandates, inheritance contracts and marriage contracts, executorship, estate division, estate bookkeeping and representation in estate divisions.
Real Estate
Marketing and brokering of real estate, management of rental properties, rental agreements, partial management services, regulations for condominium and co-ownership, legal advice in rental and STWEG disputes.
Software
Consulting and deployment of accounting and real estate software such as ABACUS, Swiss21.org, bexio, INFONIQA ONE 50, Dr. Tax Professional and W&W ImmoTop.
Trust & reputation

ranQ Trust Score of Mellarius Treuhand AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

Mellarius Treuhand AG scores 70.2 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.84.124%
  • 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.65.210%
  • 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%
Mellarius Treuhand AG scores 89.3 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.70.07%
Mellarius Treuhand AG scores 85.0 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).85.022%
Mellarius Treuhand AG scores 31.4 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 35.31.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Mellarius Treuhand AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 out of 5 stars from 12 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 12 reviews across all connected sources

Sources
GGoogle512
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Imkerstrasse 7
8610 Uster
Opening hours
Mon
08:00 - 12:00, 13:30 - 17:00
Tue
08:00 - 12:00, 13:30 - 17:00
Wed
08:00 - 12:00, 13:30 - 17:00
Thu
08:00 - 12:00, 13:30 - 17:00
Fri
08:00 - 12:00, 13:30 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-110.480.607
Founded
2004 · 22 years
Last commercial register change
May 28, 2025
Employees
11 to 20
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.
100.0
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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