In Illinois, a landlord has 45 days from the move out date to return the security deposit. However, if the landlord intends to make deductions on the security deposit, the landlord must provide the tenant with the written statement of charges within 30 days of the move out date.
If the landlord fails to provide the written statement within the 30 days, the landlord forfeits the right to make deductions and must return the full security deposit within 45 days from the move out date as if there were no allowable deductions.
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The information for this answer was found on our Illinois Security Deposit Law answers.