Firm profile

Guyer & Regules is proud to be considered as Uruguay’s blue chip firm and first choice for international and domestic complex legal, accounting and tax work. Such a reputation is grounded on the firm’s solid team of internationally trained professionals and the largest group of the most experienced partners in the country, who have become the clients’ trusted advisers through daily service excellence.

Guyer & Regules is the first Uruguayan firm to have been recognised as “Latin America Law Firm of the Year”, “Uruguayan Law Firm of the Year” for five years and to have received the “Client Service Award” by Chambers & Partners. The firm has also been granted the award “Uruguay Tax Firm of the Year” for three years by International Tax Review (Euromoney) and the award “Law Firm of the Year – Uruguay” by International Financial Law Review for two consecutive years.

Main International Areas of Practice

Banking & Finance

Guyer & Regules is the first choice in the banking and finance area and the most active player in the market; it is not by chance that competitors acknowledged that the firm is present in 80 percent of the deals. With a premium clientele of banks and financial entities, the firm participated in the first transactions in fields such as syndicated loans, investment funds, public work trust structures, issuance of preferred shares through ADR, US privately placed securities, venture capital structures, and others. The firm has participated in all of the Uruguayan debt issuances and exchanges in the international markets in the past decades, representing underwriters and lead managers.


The firm participated in the first merger of pension fund managers, in several mergers of banks, several companies’ spin-offs, transfer of assets, equity investments, private equity and companies’ acquisitions, including Stora Enso´s acquisition of ENCE´s forestry assets, being the largest M&A deal done in Uruguay. The firm also acted on several concession proceedings in different areas (port, oil & gas, airline, fuel, alcohol, cement, transport and airport).

Accounting & Tax

The Accounting & Tax Team has been chosen by many multinational corporations for the outsourcing of their local and international work in accounting, reporting, tax compliance, payroll and human resources management, tax advice, legal support and some administrative assistance, being our professionals trained to use the latest available software tools. The firm also has one of the strongest teams in international tax planning with highly personalised services.

Real Estate

As the largest and most experienced in the country, the Team has a very strong presence in agribusiness and forestry investments and is also extremely active in tourism and residential developments, especially in Punta del Este and its surroundings, where Guyer & Regules opened a new office.


The Team specialises in complex civil and commercial litigation and arbitration generally involving high-profile cases. Recent matters include carrying out a stalwart defence representing Philip Morris in the unconstitutionality action brought by the State Attorney against the Law which ratified the Swiss Uruguay bilateral investment protection agreement and the Law which ratified the ICSID Convention in lieu with the protection of Swiss investments, achieving an unanimous judgment from the Supreme Court rejecting the action.


The Team excels for its services both in advisory and litigious labour matters. It has represented all of the Uruguayan financial entities in the collective bargaining agreement negotiations with the banking union and the government and advises the Uruguayan Chamber of Pharmaceutical Laboratories.


The firm advises Telefónica since its entry in Uruguay, as well as several telecom entities: cellular, long distance and data transmission services; call centres; long distance carriers like Convergia; satellite operators like Star One and Eutelsat; data transmission operators; the only private teleport operator and Emergia which is the only underwater cable transmission system installed in Uruguay, among others.


The firm increasingly advises companies entering Uruguay in this booming sector. The firm advised the only natural gas transporter that transports NG from Argentina to Uruguay. It advises Tullow Oil, BG and Total on off shore exploration activities for the search of oil in Uruguay and GDF Suez on the BOOT agreement with Gas Sayago (state-owned company) regarding an LNG re-gasification floating plant. The firm has a vast experience in wind and solar farm developments, advising not only on foreign businesses trading electricity with the state-owned power company (UTE) but also in the development of biomass power plants.


The firm has vast experience on aviation matters, advising many international carriers on issues related to aeronautical permits, regulations, claims and aircraft financing.


Since the repeal of the State insurance monopoly, the firm has built a large portfolio of international clients.