Foreign currency (FX)‐based loans and deposits became very popular in Central and Eastern European countries (CEECs) over the 2000–2011 period. In this paper, I simultaneously examine the demand‐side (consumer‐related) and supply‐side (bank‐related) determinants of the quick spread of FX banking. I use a newly constructed dataset on FX and domestic currency loans, deposits and interest rates, covering 16 CEECs overtime. Local‐FX interest rate and market share spreads are: (1) lower in managed currency regimes; (2) strongly affected by the prevalence of FX funding, currency mismatch and FX banking restrictions, and (3) wider after economic crises.