Can I use @Throws in multi-platform (common) code? EDIT: My code is 99% common (with the 1% being some platform-specific tweaks ). But I would still need to add @Throws annotations to several methods so that the iOS consumers of my iOS-generated library can try/catch these methods. Any idea how I could achieve this?

Yeah. Either use stately or just copy/paste expect actual code https://github.com/touchlab/Stately/blob/master/stately/src/commonMain/kotlin/co/touchlab/stately/annotation/Annotations.kt