IFRS 15 is the IFRS standard that addresses revenue from contracts with customers.
The International Accounting Standards Board issued IFRS 15 in May 2014 to create a comprehensive framework for recognizing revenue. It applies the core principle that revenue should depict the transfer of promised goods or services to a customer in an amount reflecting the consideration an entity expects to receive.
Its model is commonly summarized in five steps: identify the contract, identify the performance obligations, determine the transaction price, allocate that price to the obligations, and recognize revenue when or as obligations are satisfied. IFRS 15 became mandatory for annual reporting periods beginning on or after January 1, 2018.
IAS 18 is a tempting answer because it was the older revenue standard, but IFRS 15 replaced it, along with IAS 11 and several interpretations. IFRS 16 covers leases, IFRS 9 covers financial instruments, and U.S. GAAP uses the closely related ASC 606 framework rather than an IFRS designation.