Fiduciary Offices in
Winterthur

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

Companies

50 of 165 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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Treuhandbüro Werner Eicher Verwaltungs- und Treuhand AG

Since 1990

AccountingTax Advisory and Tax ReturnsCompany Formation and Advisory

View profile4.8(4)

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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Cawi Treuhand, Brigitte Gallucci-Widmer

Since 1997

Tax advice and tax returnsFiduciary servicesInheritance advisory

View profile5(3)

PricewaterhouseCoopers AG

Since 1998

Fiduciary ServicesAudit and AssuranceTax Advisory

View profile1(1)

PRT Revisions & Treuhand AG

Since 1999

SME Fiduciary ServicesTax ConsultingSME Consulting

View profile4(8)

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 profile2.6(20)

Kaiser Buchhaltungen AG

Since 2004

Financial accountingManagement accountingAnnual financial statements

View profile4.6(9)

pamo treuhand pascale moser

Since 2004

AccountingTax advisoryVAT advisory

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Müller Schuhmacher AG

Since 2005

Property saleProperty managementTrust services

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CORTI SPLEISS Management AG

Since 2006

Main construction services

View profile4.1(14)

Blum Immobilien Treuhand GmbH

Since 2006

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

View profile3.4(21)

itb treuhand ag

Since 2006

Company formationBookkeepingTax consulting and tax planning

View profile4.8(5)

topserve.ch GmbH

Since 2006

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

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proSaldo. Für Zahlen und mehr. Verena Kaspar-Dolder

Since 2006

Financial Accounting and Annual Financial StatementsPayroll and HR AdministrationTax Advisory and Returns

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Corbié GmbH

Since 2007

AccountingTaxesControlling

View profile1(1)

ATAXA GmbH

Since 2007

Tax advisoryFiduciary services

View profile5(4)

DCL Concept, Daniel Spadin

Since 2007

Personal tax returnCorporate tax returnCompany formation

View profile1(1)

Renox Treuhand GmbH

Since 2007

Tax AdvisoryAccountingPayroll Administration

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websoft AG

Since 2007

Company formationTrust servicesTax return

View profile3(2)

AHL Treuhand GmbH

Since 2007

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

View profile4.6(9)

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

View profile4.3(6)

schwabkuster gmbh

Since 2009

AccountingTax returnsSocial insurance

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Scoppetta & Merkt Treuhand GmbH

Since 2010

BookkeepingTax advisoryPayroll Services

View profile5(2)

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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JurConsult GmbH

Since 2012

Asset ProtectionTax AdvisoryLegal Advice

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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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Taxwerk, Adriane Hayn

Since 2014

Tax advisory and tax return preparationFinancial and accounting servicesHR administration and payroll

View profile5(4)

Breitenmoser Treuhand GmbH

Since 2015

AccountingTaxesTax return

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Fiduciary Offices in Winterthur

165Fiduciary OfficesCommercial register (Zefix) · as of September 23, 2026

2009Median year of registrationCommercial register (Zefix) · as of September 23, 2026

3,231in the Canton of ZurichCommercial register (Zefix) · as of September 23, 2026

17,103in SwitzerlandCommercial register (Zefix) · as of September 23, 2026

Locations

Fiduciary Offices in the region

Point size by number of companies per place.

Source: commercial register (Zefix) · as of September 23, 2026

Largest places

Zurich1,160 Dübendorf74 Dietikon68 Uster54 Thalwil46 Wallisellen46 Volketswil43 Zollikon42 Kloten41 Küsnacht ZH40

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 & Services356 Management Consulting352 Restaurants327 Software Development284 Coaching & Personal Development234 Property Management224 Technical Consulting & Engineering211 Architecture Firms189 Advertising Agencies189 Facility Management & Cleaning179 Holding Companies154 Online Shops131 Real Estate Project Development123 Trade Fair & Event Organizers121 Real Estate Brokerage114 Automotive & Vehicle Trade110 Painting & Plastering109 Other Service Industries107 Continuing Education Institutes106 Hair Salons105 NGOs & NPOs102 Auto Repair Shops101 Beauty Salons93 General Contractors91 Cultural & Educational Organizations88 Building Maintenance84 Construction & Project Management83 Wholesale - General Specialty Trade81 Psychiatry & Psychotherapy79 Catering78 Recruitment & HR Consulting74 Logistics & Transport Companies70 Flooring & Tiling69 Non-Medical Healthcare Professions69 Web Portals & Platform Companies66 Retail - Food & Luxury Items66 Wholesale - Food & Luxury Items66 Photography64 Sports & Recreation Instruction60 Retail - Textiles & Clothing60 Film & TV Production59 Retail - General Specialty Trade59 Electrical Planning & Installation58 Food Processing58 Plumbing & Building Services57 Clubs, Bars & Event Venues57 Sealing & Insulation54 Financial Services53

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Fiduciary Offices inWinterthur

50 of 165 companies

Fiduciary Offices in the region

Fiduciary Offices in other places

Other industries in Winterthur

Fiduciary Offices in
Winterthur