Embodiments of the invention are directed to a computer-implemented expense splitting method and system for allowing a payer to divide expenses among multiple purchasers with merchant integration. The method may include storing, in at least one computer memory, payer data and expense splitting instructions and accessing the computer memory with at least one computer processor and executing the instructions to perform multiple steps. The steps may include converting a captured receipt image to purchase data and providing a user interface displaying entries corresponding to purchases, and further providing a tagging option for tagging each of the entries with an indicator of at least one purchaser identity. The steps may also include storing the receipt data and format for easy receipt capture on a subsequent purchase.