How is my reckonable residence calculated for Long Term Residency, and what about overlapping permissions?

Immigration Service Delivery calculates your residence by looking at the actual stamps endorsed in your passport and the validity dates of your IRP cards. Gaps where you held no valid permission are excluded.

If you held more than one permission at the same time, the overlapping period is counted only once rather than doubled. This means it is the continuous span of lawful residence that matters, so keeping your registration up to date and avoiding lapses is important.