Interpay owned the payment systems PIN, Chipknip, Acceptgiro and Incasso.

In 2005, they spun off Currence which in 2006 merged with German company Transaktionsinstitut für Zahlungsverkehrsdienstleistungen AG to form Equens.

[5] In September 2003, Interpay started together with Banksys and SSB the company Sinsys for credit cards, to reduce costs.

[9] The Netherlands Competition Authority fined Interpay for 30 million euros because their tariffs were 5 to 7 times too high.

[13] Interpay had two subsidiaries: Paysquare which facilitated the acceptance of credit cards, and InterEGI which distributed the prepaid Chipknip.