debit networks market share report

According to a Federal Reserve report, Interlink, Star, Pulse, and NYCE have the largest the market share for PIN debit transactions. The shares are Interlink 37%, Star 29%, Pulse 11%, NYCE 8% and other 15%, as of 2007. The report calculations reference Nilson Report and other industry sources for the data.

This is good background information when looking at least cost routing.