The Australian Government Rebate on private health insurance is indexed over time; the percentage you receive depends on your age and income tier for MLS purposes. When adjustment factors change, your net premium after the rebate can move even if your insurer's headline rate stays flat.
April is a busy month in health insurance because premium changes and rebate settings often align with the policy year — it is a good moment to log in to your fund, download your tax statement, and confirm your tier.
If your income or family status changed, updating tier estimates helps avoid surprises at tax time.