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Studio Diaferia has been established in 1997 by Dr. Roberto Diaferia Chartered Accountant enrolled in Milan Chartered Public Accountants and Tax Advisers Register and in the National Register of Accounting Auditors.

Since 1998, Studio Diaferia is founding partner of Studio Associato Legale Tributario e del Lavoro, a professional association of tax advisers, labor consultants and lawyers based in Milan and Varese.

The professional activity of the firm is supported by linked service companies supplying bookkeeping and accounting services to small and medium sized companies, payroll service, workplace safety and health, privacy, management control and planning.

With a professional experience gained in more than 20 years, Studio Diaferia and Studio Associato Legale Tributario e del Lavoro are highly specialized in the assistance of non-resident companies with subsidiaries, branches or rep. Offices in Italy. Fiscal representation or assistance in applications for Direct VAT Identification are also possible on request.

The partners can either work independently in the respective areas of specialization or all together any time a multidisciplinary analysis or consulting is required by the customer. Starting from the default of two important air carriers in 2001 and 2002, the international activity of the firm has developed acquiring many airline carriers for payroll and accounting services as well as tax, labor and business consulting. This enabled the firm to cumulate experience so acquiring further international customers of manufacturing, trade, services sectors.

We currently provide accounting services to approximately 30 international customers, going from a few dozens of booking entries to more than 20.000 entries per year. Our services include assistance for the start-up of rep-offices/branches/subsidiaries, fiscal representation or assistance for direct VAT identification for EU member countries, as well as any mandatory tax return or fiscal accomplishments.

The firm currently provides

  • Accounting, business and fiscal consulting to 12 international airlines with branch or fiscal representation in Italy
  • Payroll service and labour consulting to 15 international airlines
  • Accounting, business and fiscal consulting to a group of companies operating in pulp, paper and chemical products trade
  • Accounting, business and fiscal consulting to the Italian subsidiary of US listed group, data processing sector Italian subsidiaries (2) of UK listed group, metal heat treatments
  • Italian subsidiary of a UK listed company – sector of print management and services
  • Italian subsidiary of German group (total appr. 600 employees) – sector: packing machines
  • Italian branch of US software company (appr. 250 Million USD group income)
  • Italian branch of German company – aviation and tourism sector (80 Million Euro group income)


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