H1B AC21 Portability Checker

Check if AC21 portability applies to your job change. Keep your green card priority date when switching employers after I-140 is approved 180+ days.

What This Tool Shows You

AC21 §106(c): approved I-140 with 180+ days pending protects priority date
New job must be same or similar SOC occupational classification
Old I-140 remains valid — new employer does not need to re-file I-140
New employer files H1B transfer petition — gap in employment allowed
I-485 pending applicants can also use AC21 portability with different rules

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