Fiduciary Offices in
Winterthur

121 companies in Fiduciary Offices based in Winterthur — name and year of registration from the commercial register.

Companies

50 of 121 companies

Taxalis Revisions GmbH

Since 1949

Audit / Financial auditTrust servicesTax advisory

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Bolli Treuhand AG

Since 1967

Real estate management servicesCondominium ownership managementRenovations and conversions

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Consultive Treuhand AG

Since 1974

Finance and accountingTax consulting / tax representationPayroll and personnel administration

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Taxalis Treuhand AG

Since 1977

Fiduciary servicesTax advisoryInheritance law / estate planning / estate executor

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S + C Unternehmensberatung AG

Since 1978

Accounting workLegal advicePayroll processing and HR deputies

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Eisele & Partner Treuhand AG

Since 1979

Trust services, accounting, financial reportingTax and inheritance planningHR administration and payroll accounting

View profile4.7(3)

Comes Treuhand AG

Since 1980

Business consultingBookkeeping / financial statement advisoryTax planning and advice

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A + B Revisions AG

Since 1982

Tax advisory and inheritance tax advisoryFiduciary services, accounting and financial reportingAuditing

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Diener Partner AG Treuhand und Recht

Since 1985

Tax advisoryFinance and accountingHR administration

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Ruedi Niederhauser

Since 1989

AccountingTax servicesFinancial auditing

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Bischof Treuhand AG

Since 1989

Fiduciary servicesAccounting mandatesVAT advice

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CBC Treuhand AG

Since 1993

Fiduciary & ComplianceFinance & AccountingTax Advisory

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Treuhanddienst Steiner

Since 1996

Correspondence, Accounting, Financial Statements & TaxesIT Consulting & Support

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Adiuva Treuhand GmbH

Since 1996

Tax advisory, tax planning and tax optimisationBookkeepingBusiness consulting

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C+T Management AG

Since 1997

ControllingAccountingSetup and support with accounting software

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PRT Revisions & Treuhand AG

Since 1999

SME Fiduciary ServicesTax ConsultingSME Consulting

View profile4.3(6)

Pauli & Partner Treuhand AG

Since 1999

Hospitality trust & accounting servicesPayroll accountingEezyTool® software solution

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Crea Treuhand AG

Since 2000

Fiduciary servicesManagement consultingPrivate financial planning

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Merz Consulting GmbH

Since 2001

Financial ConsultingFutureEd-, Digital Leadership Solutions

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Findea AG

Since 2003

Accounting servicePayroll accounting serviceTax advisory

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Futura Consulting Switzerland GmbH

Since 2003

Tax returnTrust, consulting and training servicesReal estate accounting

View profile2.7(20)

pamo treuhand pascale moser

Since 2004

AccountingTax advisoryVAT advisory

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Müller & Schuhmacher Treuhand und Immobilien AG

Since 2005

Property saleProperty managementTrust services

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CORTI SPLEISS Management AG

Since 2006

Main construction services

View profile3.9(12)

Blum Immobilien Treuhand GmbH

Since 2006

Real estate managementLetting of rental propertiesForms and documents for tenants and applicants

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itb treuhand ag

Since 2006

Company formationBookkeepingTax consulting and tax planning

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topserve.ch GmbH

Since 2006

Donations, financial and payroll accountingManagement of secretariats & officesProduct and market statistics

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Corbié GmbH

Since 2007

AccountingTaxesControlling

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ATAXA GmbH

Since 2007

Tax advisoryFiduciary services

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DCL Concept, Daniel Spadin

Since 2007

Personal tax returnCorporate tax returnCompany formation

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websoft AG

Since 2007

Company formationTrust servicesTax return

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AHL Treuhand GmbH

Since 2007

Accounting and payroll accountingTax consulting and tax planningTax returns and tax consulting for foreign employees (expatriates)

View profile4.5(8)

Aurelia Treuhand AG

Since 2008

Accounting / Financial statementsControlling / Reporting / Budgeting / PlanningPayroll administration

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Sinixt GmbH

Since 2008

ICT Consulting & Business ConsultingICT Security & Risk ManagementBookkeeping and Personnel Administration

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WPD Niederhauser

Since 2008

AccountingTaxAuditing

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Isler-Consolis AG

Since 2009

Family and inheritance lawFiduciary services: Taxes / AccountingChild and adult protection law

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schwabkuster gmbh

Since 2009

AccountingTax returnsSocial insurance

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Scoppetta & Merkt Treuhand GmbH

Since 2010

BookkeepingTax advisoryPayroll Services

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Optiwin Consulting, Inhaber S. Zuffi

Since 2011

Trust servicesAccountingControlling

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Hermann Treuhand GmbH

Since 2011

AccountingPayrollTax return and tax advisory

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Cawi Treuhand, Brigitte Gallucci-Widmer

Since 2012

Tax advice and tax returnsFiduciary servicesInheritance advisory

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Expat Tax Consulting GmbH

Since 2014

Tax and social security advisory for individualsHR services for international assignees and global mobilityAdvisory on employee participation plans

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CASA Group GmbH

Since 2016

Accounting for businessesTax advice and tax preparationRetirement planning

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kr-fibu schweiz, kathrin ruesch

Since 2017

BookkeepingVAT returnsAnnual and interim financial statements

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SHEvision Treuhand KmG

Since 2017

BookkeepingPayrollTaxes

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Zahlenschmiede GmbH

Since 2017

Finance and accountingPayroll accounting and HR administration

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Trösch Frey Treuhand und Beratung

Since 2017

Fiduciary servicesTaxesBusiness consulting

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Susanna Keller GmbH

Since 2018

AccountingYear-end accounts – tax-compliantTaxes: Tax return

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clawyss treuhand gmbh

Since 2018

AccountingPersonnelTaxes

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SCC Treuhand Elmazi

Since 2018

Tax advisoryBookkeepingCompany formation

View profile5(24)

Show 38 more companies

Fiduciary Offices in Winterthur

121Fiduciary OfficesCommercial register (Zefix) · as of August 26, 2026

2008Median year of registrationCommercial register (Zefix) · as of August 26, 2026

2,343in the Canton of ZurichCommercial register (Zefix) · as of August 26, 2026

13,213in SwitzerlandCommercial register (Zefix) · as of August 26, 2026

Locations

Fiduciary Offices in the region

Point size by number of companies per place.

Source: commercial register (Zefix) · as of August 26, 2026

Largest places

Zurich843 Dübendorf60 Dietikon50 Uster41 Volketswil34 Wallisellen34 Thalwil33 Meilen31 Kloten31 Horgen27

Industry axis

Fiduciary Offices in other places

Fiduciary Offices across Switzerland

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Place axis

Other industries in Winterthur

All companies in Winterthur

IT Consulting & Services246 Management Consulting226 Software Development203 Restaurants203 Coaching & Personal Development158 Technical Consulting & Engineering155 Architecture Firms154 Advertising Agencies134 Property Management125 Facility Management & Cleaning123 Online Shops88 Hair Salons86 Continuing Education Institutes85 Painting & Plastering83 Auto Repair Shops79 NGOs & NPOs76 Real Estate Brokerage76 Beauty Salons74 Real Estate Project Development70 Holding Companies63 Automotive & Vehicle Trade63 Psychiatry & Psychotherapy60 Cultural & Educational Organizations58 Recruitment & HR Consulting56 Logistics & Transport Companies56 Flooring & Tiling54 Trade Fair & Event Organizers52 Sports & Recreation Instruction52 General Contractors51 Other Service Industries50 Construction & Project Management49 Film & TV Production48 Electrical Planning & Installation47 Plumbing & Building Services46 Retail - Textiles & Clothing46 Clubs, Bars & Event Venues46 Photography44 Wellness & SPA Facilities43 Horticulture & Landscaping42 Interior Construction42 Housing Cooperatives41 Textile & Clothing Industry40 Retail - General Specialty Trade40 Mechanical Engineering Industry39 Naturopathic Clinics38 Web Portals & Platform Companies38 Sealing & Insulation37 Non-Medical Healthcare Professions37

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Fiduciary Offices inWinterthur

50 of 121 companies

Fiduciary Offices in the region

Fiduciary Offices in other places

Other industries in Winterthur

Fiduciary Offices in
Winterthur