A Property Index Number, or P.I.N., is a unique 14-digit number assigned to your property in Cook County.
It is used to:
Identify your property’s legal description
Track your assessed value
Process property tax bills
File property tax appeals
You can find your P.I.N. on:
Your property tax bill
Your assessment notice
Official county property records
Using the correct P.I.N. is critical when filing an appeal. Errors can delay or invalidate a submission.
If you need help with your P.I.N. for an appeal, you can get assistance. Visit Cook County Tax Appeals for help with the Cook County process.