Embodiments of the present application relate to the technical field of communications, and disclose a method for billing international roaming short messages, an apparatus, an electronic device, and a storage medium. The method includes: obtaining a third-party registration message sent by a serving call session control function S-CSCF, the third-party registration message is configured to carry roaming network information of a user, and the third-party registration message is based on a user registration message generation sent from a proxy call session control function P-CSCF; analyzing the roaming network information from the third-party registration message; and in response to that a short message sent by the user is received, sending the roaming network information of the user to a billing system for the billing system to bill the user according to the roaming network information.

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