It depends on whether you're already in the scheme.

If you're already an NDIS participant when you turn 65, you're in control. You can choose to stay with the NDIS or move to the aged care system. Your supports don't automatically stop.

If you're over 65 and not yet a participant, you can't apply for the NDIS. The aged care system is the pathway for support instead. My Aged Care (myagedcare.gov.au) is the starting point there.

If you're approaching 65 and think you might be eligible for the NDIS, apply before your birthday. Eligibility is assessed at the age you apply.