Ratio of outstanding offshore bank loans to GDP. An offshore bank is a bank located outside the country of residence of the depositor, typically in a low tax jurisdiction (or tax haven) that provides financial and legal advantages. Ratio of outstanding offshore bank loans to GDP. An offshore bank is a bank located outside the country of residence of the depositor, typically in a low tax jurisdiction (or tax haven) that provides financial and legal advantages. Offshore bank loan data from October 2008 version of BIS Statistical Appendix Table 7A: External loans and deposits of reporting banks vis-à-vis all sectors. Bank for International Settlements) Source Code: GFDD.OI.09