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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
2026 Edition
General corporate tax
Tier 1
56 firms ranked
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Baker McKenzie
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Studio Tributario e Societario Deloitte | STS Deloitte
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Tremonti Partners
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Tier 2

A&O Shearman
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Andersen
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Ashurst Perkins Coie
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Bird & Bird
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Clifford Chance
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DLA Piper
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Dentons
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Di Tanno Associati
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EY
7 practice areas
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Freshfields
5 practice areas
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Gatti Pavesi Bianchi Ludovici
7 practice areas
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Pirola Pennuto Zei & Associati
7 practice areas
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PwC TLS Avvocati & Commercialisti
7 practice areas
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Tax Bridge STP
4 practice areas
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Valente Associati GEB Partners / Crowe Valente
7 practice areas
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Tier 3

Belluzzo International Partners
7 practice areas
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CMS Adonnino Ascoli & Cavasola Scamoni
3 practice areas
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De Berti Jacchia Franchini Forlani
7 practice areas
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Eptalex Garzia Gasperi & Partners
6 practice areas
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Escalar & Associati
6 practice areas
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Fantozzi & Associati Studio Legale Tributario
3 practice areas
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Hager & Partners
7 practice areas
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LED Taxand
7 practice areas
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Legance – Avvocati Associati
3 practice areas
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Lipani Legal & Tax
3 practice areas
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McDermott Will & Schulte
7 practice areas
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Nctm Studio Legale
3 practice areas
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Pavia e Ansaldo
3 practice areas
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Studio Legale e Tributario Biscozzi Nobili & Partners
7 practice areas
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Studio Tributario Tognolo
4 practice areas
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WTS R&A Studio Tributario
7 practice areas
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Tier 4

Bernoni Grant Thornton
3 practice areas
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Cleary Gottlieb Steen & Hamilton
2 practice areas
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FIVERS Studio Legale e Tributario
3 practice areas
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Gianni Origoni Grippo Cappelli & Partners
3 practice areas
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Hogan Lovells Cadwalader
5 practice areas
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LifeCapital
3 practice areas
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Loconte & Partners
6 practice areas
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Tier 5

CBA Studio Legale & Tributario
2 practice areas
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Caravati Pagani
7 practice areas
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Giovannelli & Associati
2 practice areas
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Gitti and Partners - Studio Legale Associato
2 practice areas
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Jones Day
2 practice areas
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Paul Hastings
2 practice areas
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Other notable

Bureau Plattner
3 practice areas
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Fava & Partners
3 practice areas
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Masotti Cassella
3 practice areas
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Private client
Tier 2
18 firms ranked
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Tier 1

Belluzzo International Partners
7 practice areas
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Chiomenti
7 practice areas
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Gatti Pavesi Bianchi Ludovici
7 practice areas
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Maisto e Associati
7 practice areas
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Tier 2

DLA Piper
7 practice areas
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Hager & Partners
7 practice areas
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Loconte & Partners
6 practice areas
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PwC TLS Avvocati & Commercialisti
7 practice areas
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Studio Legale e Tributario Biscozzi Nobili & Partners
7 practice areas
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Studio Tributario e Societario Deloitte | STS Deloitte
7 practice areas
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Tier 3

Dentons
6 practice areas
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Eptalex Garzia Gasperi & Partners
6 practice areas
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LED Taxand
7 practice areas
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Pavia e Ansaldo
3 practice areas
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Valente Associati GEB Partners / Crowe Valente
7 practice areas
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Other notable

Masotti Cassella
3 practice areas
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Tax controversy
Tier 2
30 firms ranked
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Tier 1

Bonelli Erede Pappalardo Studio Legale
7 practice areas
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Maisto e Associati
7 practice areas
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PwC TLS Avvocati & Commercialisti
7 practice areas
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Tremonti Partners
7 practice areas
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Tier 2

A&O Shearman
7 practice areas
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Ashurst Perkins Coie
4 practice areas
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Baker McKenzie
7 practice areas
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Bird & Bird
5 practice areas
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Chiomenti
7 practice areas
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Clifford Chance
7 practice areas
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DLA Piper
7 practice areas
View profile
De Berti Jacchia Franchini Forlani
7 practice areas
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Dentons
6 practice areas
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Di Tanno Associati
7 practice areas
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Freshfields
5 practice areas
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Gatti Pavesi Bianchi Ludovici
7 practice areas
View profile
Studio Tributario e Societario Deloitte | STS Deloitte
7 practice areas
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Tax Bridge STP
4 practice areas
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Valente Associati GEB Partners / Crowe Valente
7 practice areas
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Tier 3

Belluzzo International Partners
7 practice areas
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Gianni Origoni Grippo Cappelli & Partners
3 practice areas
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LED Taxand
7 practice areas
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McDermott Will & Schulte
7 practice areas
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Pirola Pennuto Zei & Associati
7 practice areas
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Studio Legale e Tributario Biscozzi Nobili & Partners
7 practice areas
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Studio Tributario Tognolo
4 practice areas
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WTS R&A Studio Tributario
7 practice areas
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Transactional tax
Tier 1
28 firms ranked
View full list

Tier 1

A&O Shearman
7 practice areas
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Bonelli Erede Pappalardo Studio Legale
7 practice areas
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Chiomenti
7 practice areas
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EY
7 practice areas
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Maisto e Associati
7 practice areas
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Studio Tributario e Societario Deloitte | STS Deloitte
7 practice areas
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Tier 2

Andersen
7 practice areas
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Ashurst Perkins Coie
4 practice areas
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Baker McKenzie
7 practice areas
View profile
Belluzzo International Partners
7 practice areas
View full profile
Bird & Bird
5 practice areas
View profile
Caravati Pagani
7 practice areas
View full profile
Clifford Chance
7 practice areas
View profile
DLA Piper
7 practice areas
View profile
Dentons
6 practice areas
View profile
Di Tanno Associati
7 practice areas
View profile
Freshfields
5 practice areas
View profile
Gatti Pavesi Bianchi Ludovici
7 practice areas
View profile
Hager & Partners
7 practice areas
View full profile
LED Taxand
7 practice areas
View full profile
McDermott Will & Schulte
7 practice areas
View profile
Pirola Pennuto Zei & Associati
7 practice areas
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PwC TLS Avvocati & Commercialisti
7 practice areas
View profile
Valente Associati GEB Partners / Crowe Valente
7 practice areas
View full profile

Tier 3

Eptalex Garzia Gasperi & Partners
6 practice areas
View profile
Studio Legale e Tributario Biscozzi Nobili & Partners
7 practice areas
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Tier 4

FIVERS Studio Legale e Tributario
3 practice areas
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Transfer pricing
Tier 1
40 firms ranked
View full list

Tier 1

Bonelli Erede Pappalardo Studio Legale
7 practice areas
View profile
EY
7 practice areas
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Maisto e Associati
7 practice areas
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PwC TLS Avvocati & Commercialisti
7 practice areas
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Studio Tributario e Societario Deloitte | STS Deloitte
7 practice areas
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Valente Associati GEB Partners / Crowe Valente
7 practice areas
View full profile

Tier 2

A&O Shearman
7 practice areas
View profile
Andersen
7 practice areas
View profile
Baker McKenzie
7 practice areas
View profile
Bernoni Grant Thornton
3 practice areas
View profile
Bird & Bird
5 practice areas
View profile
DLA Piper
7 practice areas
View profile
De Berti Jacchia Franchini Forlani
7 practice areas
View profile
Fantozzi & Associati Studio Legale Tributario
3 practice areas
View profile
Freshfields
5 practice areas
View profile
Gatti Pavesi Bianchi Ludovici
7 practice areas
View profile
Hager & Partners
7 practice areas
View full profile
LED Taxand
7 practice areas
View full profile
Tax Bridge STP
4 practice areas
View full profile

Tier 3

Belluzzo International Partners
7 practice areas
View full profile
Chiomenti
7 practice areas
View profile
Di Tanno Associati
7 practice areas
View profile
Legance – Avvocati Associati
3 practice areas
View profile
Lipani Legal & Tax
3 practice areas
View full profile
McDermott Will & Schulte
7 practice areas
View profile
Nctm Studio Legale
3 practice areas
View profile
Pirola Pennuto Zei & Associati
7 practice areas
View full profile
Studio Legale e Tributario Biscozzi Nobili & Partners
7 practice areas
View full profile
Studio Musselli
3 practice areas
View profile
Studio Tributario Tognolo
4 practice areas
View profile
Tremonti Partners
7 practice areas
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WTS R&A Studio Tributario
7 practice areas
View full profile

Tier 4

CMS Adonnino Ascoli & Cavasola Scamoni
3 practice areas
View profile
LifeCapital
3 practice areas
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StudioTributarioTognolo
3 practice areas
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TPGS Transfer Pricing Global Solutions
3 practice areas
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Valdani Vicari & Associati
3 practice areas
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Other notable

Fava & Partners
3 practice areas
View profile
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
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
As recent surveys suggest a disconnect between AI adoption and employee engagement, the big four risk digging themselves into a strategic hole
As the firm embarks on a major shakeup of its EMEA partnerships, some staff will be watching nervously
Our first instalment features analysis of Deloitte’s landmark EMEA merger, Donald Trump’s Supreme Court tariff showdown and Venezuela’s tax evolution
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