Fiduciary Offices in
Winterthur
166 companies in Fiduciary Offices based in Winterthur — name and year of registration from the commercial register.
50 of 166 companies
ORSINI Treuhand AG
Since 2017 · 11–20 empl.4.5(66)
The core activity of ORSINI Treuhand AG is the provision of services in the areas of trust, tax consulting, business consulting, auditing and financial and payroll accounting for Swiss and foreign companies, organizations and private individuals.
SCC Treuhand Elmazi
Since 2018 · 1–10 empl.5.0(37)
The core activity of SCC Treuhand is the provision of services in the field of tax consulting and accounting, including the preparation of tax returns, accounting, company formation, business consulting and property management.
Kaiser Buchhaltungen AG
Since 2004 · 1–10 empl.4.6(9)
The core activity of Kaiser Buchhaltungen AG is the provision of services in the field of accounting, tax returns and corporate consulting, particularly for company start-ups and business planning. The company also offers trust services, taking into account not only financial aspects but also other important aspects of entrepreneurship.
CORTI SPLEISS Management AG
Since 2006 · 11–20 empl.4.1(14)
CORTI SPLEISS Management AG offers construction-related services across the project lifecycle, including project development, building execution as builder and general contractor, construction management, planning and consulting.
Conomic GmbH
Since 2019 · 1–10 empl.5.0(6)
The core activity of Conomic GmbH is the provision of services in the areas of trust, taxes, and consulting, particularly for small and medium-sized enterprises (SMEs) and private individuals. The specific activities include: accounting and control (general ledger, accounts receivable, accounts payable); tax returns and optimization (for companies and private individuals); payroll accounting and management; annual financial statements and preparation; consulting in various legal areas (employment contracts, collective labor agreements, etc.); and general business consulting and support. Overall, Conomic GmbH offers comprehensive financial and legal consulting services for SMEs and private individuals.
PRT Revisions & Treuhand AG
Since 1999 · 21–50 empl.4.0(8)
The core activity of PRT Revisions & Treuhand AG is the provision of trust, consulting and auditing services for companies, particularly SMEs, as well as for private individuals. This includes, among other things: accounting and payroll administration, tax consulting and planning, auditing and revision, consulting for company formation, sale and succession, financial planning and reporting, and communication with tax authorities and legal proceedings. The company thus offers a comprehensive range of services for companies and private individuals in the areas of finance, taxes and accounting.
Isler-Consolis AG
Since 2009 · 11–20 empl.4.3(6)
The core activity of Isler-Consolis AG encompasses consulting and services in the following areas: * Inheritance law and estate planning * Tax planning and consulting * Real estate law and administration * Mandates and guardianship * Notary and land registry services * Foundation establishment and administration * Execution of wills The company thus provides comprehensive solutions for private individuals and companies in the areas of asset planning, inheritance law and taxes.
Kanzlei im Turm AG
Since 2016 · 11–20 empl.5.0(8)
The company provides legal advice and representation in various areas, particularly in corporate law, financial market law, inheritance law, labor law, and tax law. The core activity consists of comprehensive advice and representation of companies, especially SMEs and startups, as well as private individuals in legal matters.
Treuhandbüro Werner Eicher Verwaltungs- und Treuhand AG
Since 1990 · 11–20 empl.4.8(4)
The core activity of the company 'Treuhandbüro Werner Eicher' encompasses the provision of services in the field of administration and trust, particularly: accounting and financial and accounting services, tax returns and tax optimization, company formation and consulting, personnel and payroll administration, and inheritance and adult protection law. The company thus provides comprehensive support for small and medium-sized enterprises, associations, foundations, and private individuals in tax and legal matters.
Winco Treuhand AG
Since 2019 · 11–20 empl.4.8(5)
Winco Treuhand AG provides fiduciary, business consulting and audit services for small and medium-sized enterprises and private clients. Its services include accounting and payroll, VAT and tax filings, corporate transactions (formations, conversions, liquidations), audit engagements, and hosted IT solutions such as AbaWeb and DeepBox for bookkeeping and secure file exchange.
Taxalis Revisions GmbH
Since 1949 · 1–10 empl.
Taxalis Revisions GmbH performs audit and statutory examination assignments; its auditors, licensed by the Federal Audit Oversight Authority (RAB), carry out limited and ordinary statutory audits, incorporation audits for qualified formations, audits of capital increases, audits of early asset distributions in liquidation, and special audits.
Bolli Treuhand AG
Since 1967 · 1–10 empl.
The core activity of Bolli Treuhand AG encompasses the following areas: commercial administration, corporate consulting, management and marketing of real estate, as well as financial and tax consulting for private individuals and companies. The company thus offers a wide range of services in the fields of trust and consulting, with a focus on real estate and finance.
Consultive Treuhand AG
Since 1974 · 21–50 empl.
Consultive Treuhand AG provides fiduciary services to companies and private clients, including accounting, e‑accounting, payroll and personnel administration, tax advisory and general business consulting. The firm’s offerings also include succession planning, support for company formation and sector-specific advisory services.
Taxalis Treuhand AG
Since 1977 · 21–50 empl.
Taxalis Treuhand AG provides fiduciary and advisory services for individuals and corporate clients. Services include tax consulting, auditing, estate planning, and property management and sales.
S + C Unternehmensberatung AG
Since 1978 · 1–10 empl.
The core activity of S+C Unternehmensberatung AG encompasses the provision of services in the following areas: accounting, legal consulting, human resources, taxes, backoffice software, absence management (PERDOC), and payroll certificates (LgAus). The company thus offers a comprehensive range of consulting and services for businesses, particularly in the areas of finance, human resources, and law.
Diener Partner AG Treuhand und Recht
Since 1985 · 1–10 empl.
Diener Partner AG Treuhand und Recht provides tax, fiduciary and legal services as well as real estate administration and property sales mandates. Services include tax consulting, accounting and financial statements, payroll and social security filings, estate and corporate law advice, and property management and sales.
Ruedi Niederhauser
Since 1989 · 1–10 empl.
Ruedi Niederhauser provides services in accounting, tax advisory and statutory audit. Offerings include bookkeeping and financial statements, tax returns, VAT filings, payroll and social‑insurance accounting.
Bischof Treuhand AG
Since 1989 · 1–10 empl.
Bischof Treuhand AG is a fiduciary services firm for companies and private individuals. The company provides services in bookkeeping, tax matters, debt collection, payment transactions and insurance-related matters.
C+T Management AG
Since 1997 · 1–10 empl.
The core activity of C+T Management AG is the provision of controlling and accounting services for small and medium-sized enterprises, particularly in the areas of financial management, accounting and data management. The company also offers external controller services and supports customers in the financial management and control of their business.
Crea Treuhand AG
Since 2000 · 1–10 empl.
Crea Treuhand AG provides fiduciary and business consulting services, including financial and management accounting, accounts receivable/payable, VAT and tax advisory, payroll processing and personnel administration. Services also include company formation, audit coordination with partner firms, financial planning, business plan preparation, valuations, restructuring and succession advice.
Merz Consulting GmbH
Since 2001 · 1–10 empl.
Merz Consulting GmbH provides consulting services in educational innovation, digital leadership and financial consulting. Services include FutureEd and Digital Leadership solutions, change-management support, teacher training and project management, as well as financial services such as bookkeeping, tax advice, real-estate brokerage and corporate advisory.
Findea AG
Since 2003 · 101–500 empl.
Findea AG provides digital fiduciary and financial services for start-ups and SMEs, including bookkeeping, payroll administration, tax filing and advisory, and audit services. The firm also offers cloud-based tools, domiciliation services, fiscal representation and management/board mandates.
pamo treuhand pascale moser
Since 2004 · 1–10 empl.
The core activity of Pamo Treuhand is the provision of trust services, including accounting, tax consulting and other related services.
Müller Schuhmacher AG
Since 2005 · 21–50 empl.
Müller & Schuhmacher Treuhand und Immobilien AG provides real estate and fiduciary services, including property sales, property management and construction management. Its fiduciary offerings include bookkeeping, annual financial statements and tax-related assistance.
topserve.ch GmbH
Since 2006 · 11–20 empl.
The core activity of topserve.ch is the provision of trust services, particularly in the areas of financial and payroll accounting, statistical services, management of secretariats and business offices, consulting and coaching, as well as product and market statistics. The company supports its customers in these areas and offers high-quality work at fair prices.
Renox Treuhand GmbH
Since 2007 · 1–10 empl.
The core activity of Renox Treuhand GmbH is the provision of services in the fields of accounting, auditing and taxation, particularly for small and medium-sized enterprises as well as for private individuals with high demands. The specific services include: accounting, tax planning, payroll administration, value-added tax, incorporations, auditing, and corporate consulting. The company positions itself as a trust company and is a member of TREUHAND-SUISSE, the leading professional association for experts in accounting, auditing and taxation in Switzerland.
Aurelia Treuhand AG
Since 2008 · 1–10 empl.
The core activity of aurelia Treuhand AG is the provision of services in the areas of corporate consulting, trust and administration, particularly in the fields of accounting, controlling, payroll administration, taxes, and consulting. The company offers these services to various target groups, including private individuals, companies, non-profit organizations, and social institutions.
Sinixt GmbH
Since 2008 · 1–10 empl.
The core activity of Sinixt GmbH encompasses three main areas: 1. **ICT Consulting & Business Consulting**: Strategic ICT planning, efficient and cost-optimized use of ICT resources, expert advice, technology scouting, management support, and system and network architectures. 2. **ICT Security & Risk Management**: Security consulting, risk management, business continuity management, emergency exercises, training, and coaching for ICT security, SWOT and risk analyses, as well as security analyses of company networks. 3. **Accounting and Personnel Administration**: Financial accounting, budget consulting, tax returns, liquidity planning, administrative accounting clarifications, and HR administration. Overall, Sinixt GmbH offers comprehensive services in the areas of information and communication technology (ICT), security and risk management, as well as financial and personnel management.
WPD Niederhauser
Since 2008 · 1–10 empl.
WPD Niederhauser provides accounting and tax services for SMEs and other organizations. Its services include financial accounting and balance-sheet preparation, VAT returns, tax declarations, audit/revision services, payroll and social-insurance accounting, business consulting and company formation.
schwabkuster gmbh
Since 2009 · 1–10 empl.
schwabkuster gmbh provides bookkeeping, tax return preparation and social-insurance administration for sole proprietorships, GmbHs and small corporations. Its services include specialist support for the creative industries (design, film, visual arts, architecture), financial administration for associations and foundations, as well as board mandates and real-estate advisory.
Hermann Treuhand GmbH
Since 2011 · 1–10 empl.
The core activity of Hermann Treuhand GmbH is the provision of services in the field of finance and accounting, including trust services, consulting and services for companies and private individuals.
Breitenmoser Treuhand GmbH
Since 2015 · 1–10 empl.
Breitenmoser Treuhand GmbH provides fiduciary and advisory services to businesses and private clients. Services include accounting, payroll administration and outsourcing, as well as tax returns, tax consulting, corporate law and financial planning.
Schwab & Kuster AG
Since 2015 · 1–10 empl.
Schwab & Kuster AG invests in multi-family residential properties and manages them as rental housing. The properties are renovated gently with respect for the original architecture, and the company seeks long-term tenancies.
neidhart rüttimann & partner ag
Since 2017 · 11–20 empl.
The company provides comprehensive consulting and services for entrepreneurs and self-employed individuals, particularly in the areas of company formation, management and succession. The core activities include the creation of business plans, legal advice, support in choosing the legal form, contract review, risk analysis, pension planning, corporate financing, accounting and tax returns. The company offers holistic support by providing all necessary services from a single source, providing customers with comprehensive support.
Treuhand mit Herz GmbH
Since 2019 · 11–20 empl.
Treuhand mit Herz GmbH is a fiduciary firm providing bookkeeping, tax, payroll and trust services to businesses, private clients and organizations. Its services include bookkeeping and VAT reporting, payroll and HR administration, tax return preparation, company formation support and administrative assistance for Spitex organizations.
JAWI Treuhand AG
Since 2022 · 1–10 empl.
JAWI Treuhand AG provides fiduciary and advisory services. The Treuhand Suisse directory lists Janine Arpagaus as the contact person.
Cavalli Treuhand
Since 1988 · 1–10 empl.
The core activity of Cavalli Treuhand is the provision of trust services, including: tax law consulting, corporate consulting, finance and expertise, and trust and estate services. The company thus offers a wide range of services tailored to the needs of companies and individuals in the areas of finance, taxes, and law.
m&F Treuhand Winterthur AG
Since 2009 · 1–10 empl.
The company's core activities include auditing, tax consulting, business consulting and trust services. The company supports companies and individuals in accounting, tax planning, succession planning, company valuation and other economic matters. It also offers services such as group accounting, operational analysis, rationalization measures and asset management.
itb treuhand ag
Since 2006 · 1–10 empl.4.8(5)
itb treuhand ag is a fiduciary services firm that advises companies and private clients on tax, accounting and payroll matters. Services include company formation, bookkeeping, payroll administration, tax planning, preparation of financial statements and controlling.
AHL Treuhand GmbH
Since 2007 · 1–10 empl.4.6(9)
The core activity of AHL Treuhand AG is the provision of services in the areas of trust and taxes, in particular: accounting and payroll accounting, tax consulting for individuals and companies, including taxes for foreign workers (expatriates), inheritance law and advance directives, company formations and business consulting, and software solutions for accounting and taxes. The company thus offers comprehensive services for individuals, SMEs, sole proprietorships, foundations, and associations in the areas of finance, taxes, and law.
Ricas Treuhand- und Steuerrechtspraxis GmbH
Since 2018 · 1–10 empl.5.0(6)
The core activity of RICAS Treuhand- & Steuerrechtspraxis GmbH is the provision of tax and accounting services for private individuals and small and medium-sized enterprises (SMEs). This includes, in particular: Tax returns: Preparation of tax returns for employees and pensioners; Accounting: Taking over or supporting the structuring of accounting; Insurance: Consulting and creation of insurance declarations, including social insurance (AHV, SUVA, etc.); Business consulting: Evaluation and consulting of small and medium-sized enterprises (SMEs); Start-ups: Business plan and consulting for start-ups.
Pauli & Partner Treuhand AG
Since 1999 · 1–10 empl.5.0(2)
Pauli & Partner Treuhand AG specializes in accounting for the hospitality and hotel sector. It provides bookkeeping, interim and annual financial statements, VAT filings, payroll processing and management reports, and offers installation, training and support for the EezyTool accounting/data-capture software.
A + B Revisions AG
Since 1982 · 11–20 empl.5.0(1)
A + B Revisions AG provides services in taxation, fiduciary/accounting and statutory audit. Its offerings include tax advisory, accounting and financial statement preparation, payroll administration, property management and business consulting, and it collaborates with specialist partners when needed.
Comes Treuhand AG
Since 1980 · 11–20 empl.5.0(1)
Comes Treuhand AG provides fiduciary and advisory services for SMEs, including accounting, financial statement preparation and review, tax planning and VAT matters. The firm also handles company formation and corporate-law services such as capital increases, restructurings, mergers and the preparation of business plans.
Powertreuhand für KMU GmbH
Since 2019 · 1–10 empl.5.0(8)
The core activity of Powertreuhand für KMU GmbH is the provision of administrative and financial services for small and medium-sized enterprises (SMEs). This includes, in particular: accounting and financial accounting, payroll accounting, financial planning and consulting, tax consulting and planning, social insurance consulting, organizational support, troubleshooting and setting up administrative structures. The company offers customized solutions tailored to the needs of its clients and supports SMEs in their founding, setup and consolidation phases.
Eisele & Partner Treuhand AG
Since 1979 · 11–20 empl.4.7(3)
The company's core activity is the provision of services in the following areas: * Trust and accounting * Tax and inheritance consulting * Personnel administration and payroll accounting * Real estate management and administration * Auditing * Business consulting. The company thus offers comprehensive services for companies and private individuals in the areas of finance, taxes and law.
Trösch Frey Treuhand und Beratung
Since 2017 · 1–10 empl.
The core activity of Trösch Frey Treuhand und Beratung is the provision of services in the field of business economics, particularly in the areas of: * Trust services (accounting, financial statement preparation, tax administration) * Taxes (tax planning, optimization and administration for private and legal entities) * Consulting (company formation, restructuring, merger, liquidation, company valuation, financial planning) * Accounting and controlling (implementation of asset accounting, administrative solutions) The company positions itself as a personal and reliable partner for companies and private individuals in all business-related matters.
websoft AG
Since 2007 · 11–20 empl.3.0(2)
The company provides trust and legal services, particularly in the areas of corporate administration, tax consulting and accounting. It supports founders and companies with administrative tasks, enabling them to focus on their core business. Through the digitization of processes, the company offers efficient and innovative solutions for complex legal and fiduciary services.
Treuhand Tsalapatanis
Since 2017 · 1–10 empl.
The core activity of Treuhand Tsalapatanis Winterthur is the provision of financial and accounting services, particularly for small and medium-sized enterprises (SMEs) and private individuals. This includes: tax returns and tax optimization, financial and accounting services, administration and management, budgeting and consulting, and document destruction. The company positions itself as a competent trustee and partner for SMEs and private individuals, offering individual solutions and consulting services.
H&C Treuhand AG
Since 2021 · 1–10 empl.
The core activity of HC Treuhand AG is the provision of services in the field of financial and corporate consulting, particularly in the areas of: financial accounting, payroll accounting, tax consulting, digitalization, corporate consulting, and real estate. The company thus offers comprehensive consulting and services for companies and private individuals in the areas of finance, taxes, and corporate management.
Fiduciary Offices in Winterthur
Fiduciary Offices in the region
Point size by number of companies per place.
Source: commercial register (Zefix) · as of October 10, 2026
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