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Portrait of António Payan Martins

António Payan Martins


CMS Portugal
Rua Castilho 50
1250-071 Lisbon
Languages Portuguese, English, Spanish, French

António Payan Martins develops his activity mainly in banking and finance law, in particular in acquisition finance, leveraged & mezzanine finance, project and infrastructure finance, structured finance and products.

He also has extensive experience in special situations, restructurings, turn arounds and transactions involving distressed assets and non performing loans.

He specializes in regulatory and antitrust matters in the financial sector with particular focus on antitrust matters, horizontal agreements and collusive practices, vertical restraints, distribution and consumer products. He has extensive experience in advising on complex transactions involving Portuguese-speaking countries, in particular project and infrastructure financing and planning and structuring of foreign investments.

Joined CMS Portugal in 2007.

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Memberships & Roles

  • Member of the Portuguese Bar Association since 1997
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Lectures list

  • Visiting Professor at Faculdade de Direito, Universidade Católica Portuguesa: Banking Law, Economic Law and Competition Law, 2003-present
  • Assistant Professor at Faculdade de Direito, Universidade Católica Portuguesa, 1995 - 2003


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  • Law degree, Faculdade de Direito, Universidade Católica Portuguesa
  • Master of Laws (LL.M.) in Business Law, Faculdade de Direito, Universidade Católica Portuguesa
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Meet the Law - Profit Par­ti­cip­a­tion Loan
On 13 Janu­ary, entered in­to force the leg­al re­gime of the Profit Par­ti­cip­a­tion Loans (RJEP), ap­proved by De­cree-Law No. 11/2022, of 12 Janu­ary.The Profit Par­ti­cip­a­tion Loan (PPL) is presen­ted as an in­stru­ment...
An­tónio Pay­an Mar­tins fea­tured in The Law­yer
CMS Rui Pena & Ar­naut’s Bank­ing and Fin­ance Part­ner com­ments on the reg­u­lat­ory "sand­box" that will sur­round pro­jects such as fintech in a new art­icle of the Brit­ish magazine "The Law­yer".The art­icle...
Meet the Law - Amend­ment of the ex­cep­tion­al and tem­por­ary meas­ures con­cern­ing...
On 29 Septem­ber 2020, De­cree-Law 78-A/2020 amend­ing the ex­cep­tion­al and tem­por­ary meas­ures re­lat­ing to the COV­ID-19 pan­dem­ic was pub­lished. As a res­ult, De­cree-Law No. 10-J/2020 of 26 March, which es­tab­lishes...
IFLR1000 dis­tin­guishes CMS Rui Pena & Ar­naut
CMS Rui Pena & Ar­naut has just been high­lighted by the in­ter­na­tion­al dir­ect­ory IFLR1000.The firm is re­com­men­ded in the fol­low­ing areas:Bank­ing;Cap­it­al Mar­kets: Debt;Cap­it­al Mar­kets: Equity;M&A;Pro­ject...
New rules on cred­it agree­ments for con­sumers re­lat­ing to res­id­en­tial im­mov­able...
De­cree-Law no. 74-A/2017, pub­lished in the Por­tuguese Of­fi­cial Journ­al on 23 of June 2017 ("DL 74-A/2017"), trans­poses in­to the Por­tuguese jur­is­dic­tion part of the pro­vi­sions set forth in Dir­ect­ive no...
News about the pro­gram Direito a Falar ded­ic­ated to Com­pet­it­ive­ness Tax...
The con­cerns of cor­por­ate law­yers, pro­jects between AB­BC and DLA Piper com­pet­it­ive­ness and fisc­al and bank­ing were the themes of the first two pro­grams in June of­Direito a Falar, a part­ner­ship between...
Patrick Dew­erbe and Ant­o­nio Pay­an Mar­tins par­ti­cip­ate in “Direito a Falar”,...
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Patrick Dew­erbe and Ant­o­nio Pay­an Mar­tins par­ti­cip­ate in “Direito a Falar”,...
Por­tugal has a com­pet­it­ive tax policy? This is the motto for today's is­sue in "Direito a Falar". The CMS Rui Pena & Ar­naut law­yers Patrick Dew­erbe and An­tónio Pay­an Mar­tins will be at the stu­dio to com­ment...
Re­struc­tur­ing of Com­pan­ies in de­bate on "Direito a Falar", fea­tur­ing CMS...
In­ter­na­tion­al Ar­bit­ra­tion is the motto of the CMS RPA event
The in­ter­na­tion­al ar­bit­ra­tion un­der the Por­tuguese per­spect­ive is the theme of a sem­in­ar that CMS Rui Pena & Ar­naut pro­motes next Thursday, Septem­ber 20, at the Hotel Sheraton in Lis­bon. The sem­in­ar takes...