Under IFRS 9, a financial asset passes the Solely Payments of Principal and Interest (SPPI) test when its contractual cash flows represent payments of principal and interest on the outstanding principal amount only — a prerequisite for classification at amortised cost or fair value through other comprehensive income (FVOCI).
The IFRS 9 SPPI test is one of two mandatory gates for financial asset classification. The other is the business model test. Both must be assessed at initial recognition (IFRS 9.4.1.1).