The 90/180 visa-free rule for Serbia + visa-run strategy

Formula: rolling window of last 180 days ≤ 90 days total stay.

If near the cap: plan a visa-run or file Residence Permit.

Popular visa-run destinations: Hungary (Horgos/Kelebija), Montenegro, N.Macedonia, Romania, Bulgaria, Croatia.

A full 90-day absence resets the cycle.