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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,952 companies indexed · Last updated: today
DirectoryFinance & InsuranceAccountantRafzProrest Treuhand Pia Widmer
Prorest Treuhand Pia Widmer Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Prorest Treuhand Pia Widmer provides fiduciary and business consulting services, with a particular focus on the hospitality industry. Its services include bookkeeping and year-end closing advice, payroll administration, tax consulting, budgeting and controlling, as well as support with Abacus, AbaWeb and AbaNinja.

AI-generated
Presence

Service area

Offering

Products & services

Industry:Accountant
✓ Offered9
Bookkeeping and financial statement advisory
Bookkeeping, advisory for financial statement preparation, annual accounts and analysis of KPIs for companies; fiduciary solutions tailored to individual needs.
Payroll administration
Payroll administration with specialization in the hospitality industry, including L-GAV compliance and the associated administrative processing.
Tax advisory
Tax advisory for companies and administrative support with tax matters and obligations.
Business consulting for gastronomy
Business consulting specifically for gastronomy, supplemented with individual advice in special situations and support close to operations.
Planning, budgeting, controlling and reporting
Planning and budgeting, controlling and reporting for business management; complemented by analysis of KPIs.
Accounting organization
Accounting organization for companies as a fiduciary and administrative service.
Business start-up
Company start-up with fiduciary support and administrative assistance in setting up the business.
Training and coaching
Training and coaching for clients on fiduciary, administrative and business management topics.
IT consulting and support
IT consulting and support, including Abacus support and WebTreuhand solutions such as AbaWeb and AbaNinja.
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3.8/5

Prorest Treuhand Pia Widmer

Trust & reputation

ranQ Trust Score of Prorest Treuhand Pia Widmer: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of November 2026

Prorest Treuhand Pia Widmer 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%
Prorest Treuhand Pia Widmer 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%
Prorest Treuhand Pia Widmer scores 86.7 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).86.722%
Prorest Treuhand Pia Widmer scores 5.4 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 35.5.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Prorest Treuhand Pia Widmer reaches a ranQ Trust Score of 3.8 out of 5.0 — rated «High». 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 November 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

Bahnhofstrasse 88
8197 Rafz
Opening hours
Mon
09:00 - 12:00, 14:00 - 17:00
Tue
09:00 - 12:00, 14:00 - 17:00
Wed
09:00 - 12:00
Thu
09:00 - 12:00, 14:00 - 17:00
Fri
09:00 - 12:00, 14:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Sole proprietorship
UID
CHE-104.578.824
Founded
1998 · 28 years
Last commercial register change
July 15, 2019
Employees
1 to 10

Active in 1 of 26 cantons

  • ZHZurich
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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