The present invention extends to methods, systems, and computer program products for transferring digital receipt data to mobile devices. A point-of-sale (“POS”) system generates digital receipt data as part of a sales transaction. The point-of-sale (“POS”) system and a mobile device, possibly also along with a receipt data server, interoperate with one another to transfer digital receipt data generated to the mobile device. In some embodiments, the point-of-sale (“POS”) system transfers digital receipt data for a sales transaction to the receipt data server. An identifier, such as, for example, an application identifier or transaction identifier, is stored along with the digital receipt data to match the digital receipt data with the mobile device. The mobile device subsequently uses the identifier to access the digital receipt data from the receipt data server. In other embodiments, the point-of-sale (“POS”) system transfers digital receipt data directly to the mobile device.