International Tax Review is part of Legal Benchmarking Limited, 1-2 Paris Garden, London, SE1 8ND

Copyright © Legal Benchmarking Limited and its affiliated companies 2026

Accessibility | Terms of Use | Privacy Policy | Modern Slavery Statement


Key contacts
Country Tax Leader: Alessandro Lualdi
Tax Partner – Head of Transfer Pricing: Aldo Castoldi
Quick facts
Network memberships

Deloitte

Key practice areas
General corporate tax
Indirect tax
Private client
Tax
Tax controversy
Transactional tax
Transfer pricing
Firm overview

Supported by the international, multidisciplinary Deloitte network, about 700 Tax professionals in thirteen Italian cities (Bologna, Genova, Padova, Catania, Milano, Roma, Firenze, Napoli, Torino, Parma, Treviso, Varese, Bari) and desks in New York and Hong Kong, combining a broad range of professional experience with industry-specialist knowledge. STS Deloitte is able to provide its clients with advice and assistance on both Italian matters and cross borders matters with a complete range of services, paying attention to the technical aspects, in the following areas:

  • Business Tax
  • International Tax
  • VAT & Global Trade Advisory
  • Global Employer Services (GES)
  • Transfer Pricing
  • Mergers & Acquisitions
  • Tax Controversy
  • IT Tax tools (TMC)
  • Business Process Solutions (BPS)
  • Global Investment and Innovation Incentives (Gi3)
  • Private Client Services

Since a few years now, STS Deloitte (part of the Deloitte Network) has become the largest tax practice in Italy in terms of the number of full-time dedicated transfer pricing professionals (tax specialists, lawyers, analysts and economists), grouped in one national service line (set up in 1999). The team located in five different geographical locations in is led by Aldo Castoldi.

STS-Deloitte transfer pricing SL:

  • has a “passion” for innovation and assisted in the negotiation and conclusion of the first Italian Advance Pricing Agreement (APA), in the first settlement of an Italian transfer pricing case through the European Union Mutual Agreement and Arbitration Convention;
  • assisted clients in the two first ever contemporaneous multilateral audits jointly carried out by the Italian and German Tax Authority;
  • have been developing and implementing IT Tools and solutions for TP Documentation and Analytics projects.
Key practice areas
  • Compliance Management
  • Business Model Optimisation
  • Economic Modelling
  • Policy Design
  • IP Management
  • Corporate Tax Matters
  • Restructuring
  • APAs
  • M&A
  • Financial Services
  • Corporate Taxes
  • Technology
  • Cryptocurrency
  • Dispute Resolution
  • Pre-litigation
  • MAPs/ADRs
  • Litigation
  • Tax Advisory
  • Tax Consulting
  • International Tax Advisory
  • US Inbound
  • Indirect Tax
  • VAT
  • Customs
Sector expertise
  • Automotive
  • Aviation
  • Banking
  • Consumer Goods and Services
  • Energy
  • Financial Services
  • Food and Beverage
  • Gaming
  • Healthcare
  • Insurance
  • Media
  • Natural Resources
  • Oil and Gas
  • Pharma and Life Sciences
  • Real Estate
  • Shipping
  • Tech and Telecoms
  • Tourism
Key practice contacts and recent matter highlights

Business Tax
Stefano Mazzotti
smazzotti@sts.deloitte.it

International Tax
Luca Bosco
lubosco@sts.deloitte.i

Transfer Pricing
Aldo Castoldi
acastoldi@sts.deloitte.it

Global Investment and Innovation Incentives (GI3)
Ranieri Villa
ravilla@sts.deloitte.it

Indirect Tax
Antonio Piciocchi
apiciocchi@sts.deloitte.it

Global Trade Advisory
Pier Paolo Ghetti
pghetti@sts.deloitte.it

Global Employer Services
Simone Viligiardi
sviligiardi@sts.deloitte.it

Tax Controversy
Matteo Costigliolo
mcostigliolo@sts.deloitte.it

It Tax Tools (TMC)
Stefano Mazzotti
smazzotti@sts.deloitte.it

Mergers & Acquisitions
Francesco Saltarelli
fsaltarelli@sts.deloitte.it

Business Process Solutions (BPS)
Roberto Rocchi
rrocchi@sts.deloitte.it

Offices
  • Milano
  • Bologna
  • Firenze
  • Genova
  • Padova
  • Roma
  • Torino
  • Napoli
  • Catania
  • Parma
  • Bari
  • Varese
  • Treviso
  • Parma
  • Bari
  • Varese
  • Treviso
Address:
Via Tortona 25
Milano, 20144
Tel: +39 02 83324111 Email:Contact Us Web Address:http://www.deloitte.com

World Tax Sponsored

  • Sponsored by Deloitte
  • Sponsored by Deloitte
  • Sponsored by Deloitte
2027 Edition
General corporate tax
56 firms ranked
View full list

Tier 1 ...


Unlock this content.

These rankings will be officially released on October 29. Subscribers can view the rankings now through exclusive early access.

To unlock this content:

Request Early Access or Login
Private client
19 firms ranked
View full list

Tier 1 ...


Unlock this content.

These rankings will be officially released on October 29. Subscribers can view the rankings now through exclusive early access.

To unlock this content:

Request Early Access or Login
Tax controversy
35 firms ranked
View full list

Tier 1 ...


Unlock this content.

These rankings will be officially released on October 29. Subscribers can view the rankings now through exclusive early access.

To unlock this content:

Request Early Access or Login
Transactional tax
33 firms ranked
View full list

Tier 1 ...


Unlock this content.

These rankings will be officially released on October 29. Subscribers can view the rankings now through exclusive early access.

To unlock this content:

Request Early Access or Login
Transfer pricing
43 firms ranked
View full list

Tier 1 ...


Unlock this content.

These rankings will be officially released on October 29. Subscribers can view the rankings now through exclusive early access.

To unlock this content:

Request Early Access or Login
Linked Reviews
Tax

The international, multidisciplinary Deloitte network supports the firm, with about 700 Tax professionals in 13 Italian cities (Bologna, Genova, Padova, Catania, Milano, Roma, Firenze, Napoli, Torino, Parma, Treviso, Varese, Bari) and desks in New York and Hong Kong, combining a broad range of professional experience with industry-specialist knowledge. As a result, STS Deloitte can provide its clients with advice and assistance on Italian matters and cross-border matters with a complete range of services, paying attention to the technical aspects. Stefano Mazzotti is a key individual at the company.

During the research period, the firm supported an Italian software firm in quantifying the advantage of the Patent Box. In addition, the team helped the Italian private equity group WISE on the sale of 100% of Tap to the international private equity firm Stirling Square Capital Partners.

Giovanni Battista Beccari, a manager from Studio Palazzo, and Luca Gasparrini, a director, joined the firm during the research period.

10 results10 results
The big four firm allegedly reviewed backdated documents and signed off on accounts that removed hundreds of millions of dollars of Abramovich’s assets
Death, taxes and Deloitte hoovering up trophies at an ITR awards night. Isn’t that the saying?
Awards
It was another banner year for Deloitte, which picked up more awards than any other firm at a gala ceremony held at The Londoner in Leicester Square
Ethics seems to be playing a subservient role to an entitlement culture borne out of a pervasive ‘revenue at all costs’ mentality at the big four
Tom Goldstein’s attempt to overturn his tax conviction was shot down; in other news, Deloitte promoted several tax partners in Italy
The big four spin-off firm becomes Taxand’s second UK member; in other news, Haynes Boone launched a UK tax practice
Following Richard Houston’s switch to the newly formed Deloitte EMEA, Graves has the opportunity to bring Deloitte’s tax practice up to speed with its rivals
Darren Graves will succeed Richard Houston, who is set to lead Deloitte EMEA; in other news, Morgan Lewis hired a three-partner tax team in New York
Sponsored

Sponsored

ITR Sponsored

should have bg #f6f8fb but is leaving an artifact

World Tax Sponsored