Erste Group Bank (>> Erste Group Bank AG), Raiffeisen Bank International (>> Raiffeisen Bank International AG), Raiffeisen Zentralbank Oesterreich [RZB.UL] and UniCredit Bank Austria (>> UniCredit SpA) have to start with a raise of 0.25 percent as per Jan. 2016, which must be doubled every January until 2019.

Austrian banks have bemoaned additional requirements weighing on their results, such as a special banking levy which the government is set to change next year, which are in addition to European demands on the sector.

"The aim is to increase the ability of these lenders to resist their specific systemic risks," FMA said in a statement.

It added the requirement for banks to boost their buffer in core equity comes on top of their SREP (Supervisory Review and Evaluation Process) ratio.

The decision was based on a recommendation from Austria's Financial Market Stability Board, which will in future assess the need for further capital buffers on a quarterly basis, FMA said.

Also affected are Bawag PSK [CCMLPB.UL][CBS.UL], Hypo NOe [NLSBHY.UL], Hypo Tirol [HYTBK.UL], Oberoesterreichische Landesbank [OBERL.UL], Raiffeisenbank Niederoesterreich [RHNDWR.UL], Raiffeisenlandesbank Oberoesterreich (>> Raiffeisenlandesbank Oberoesterreich AG), Sberbank Europe and Vorarlberger Landes- und Hypothekenbank [VORARL.UL].

The latter have to add a maximum of 1 percent to their buffer by 2019.

(Reporting By Shadia Nasralla, editing by William Hardy)