Banks are generally open Tuesday to Friday, 09:00 to 16:00, and on Mondays from 13:00, although some may open longer hours than this. Leading banks include ABN-AMRO, ING and Rabobank which are among the top 20 banks in the world. Postbank is the cheapest place to convert currency. ABN-AMRO have a specific expat service (www.yourexpatbank.com).