Good to know. I'm in this position for 2025 (previously was chargeable for 2024 but no longer in scope but haven't deregistered). If I remember I'll report back on whether this is auto-applied in the Form 11 even after I've ticked that I'm only voluntarily filing Form 11 for 2025.Yes, you will become a 'chargeable person' if you submit a Form 11/Self-assessment return for any reason.
A person is not a 'chargeable person' if their unearned income is less than €5,000 and this income is taxed under the PAYE system (Form 12/myAccount).
People aged under 16 and over 70 are exempt from PRSI and are not liable for the charge.