The European Bank for Reconstruction and Development (EBRD) has extended a 57.786.842 euro loan to Zagreb Airport to support the financial restructuring of the concession. In a statement, the EBRD said, "The Bank's financing would contribute towards the strengthening of the balance sheet structure of the company as part of a wider refinancing package, with a view to ensuring the airport's financial sustainability in the longer term". It added, "Successful balance sheet restructuring of Zagreb Airport will improve the sustainability of the concession arrangements in the medium to longer term, permitting further private concessions and efficient operations by commercial parties. The contribution to the restructuring is expected to maintain confidence in the operation and keep a key infrastructure run by the private sector".

Late last year, the Croatian government gave its approval for Zagreb Airport's operator to refinance some 198 million euros of debt from 2013 under more favourable terms. "Conditions have been met for the refinancing of existing debt which will enable the concessionaire to further strengthen the stability of the project, pave way for investments into the expansion of the passenger terminal and lower future business risks", the Croatian Minister for Sea, Transport and Infrastructure, Oleg Butković, said at the time. Under the agreement between operator Zagreb Airport International Company (ZAIC) and the Croatian government, the concession holder cannot amend or in any way alter the financing agreement prior to approval from the state.

ZAIC is expected to launch the second phase of the airport's terminal expansion in the year it anticipates handling five million passengers. According to the airport operator, the milestone will be reached in 2026. At this point, the main project for the second phase is yet to be finalised, as the airport's masterplan is being updated. Based on the previous model, the second phase will involve an investment of 75 million euros. ZAIC is made up of six shareholders, including Aeroports de Paris Management (20.77%), Bouygues Batiment International (20.77%), Fond Marguerite (20.77%), IFC (17.58%), TAV Airports (15.0%) and Viadukt (5.11%). Viadukt, which is in liquidation, unsuccessfully attempted to sell its stake in the consortium earlier this year.