Zakat on Security Deposits and Advance Rent

Short answer: (1) Refundable security deposit: it is your wealth — a receivable (strong debt) held by the landlord. If he is solvent and refund is assured, add it yearly to your own zakat reckoning. (2) Advance rent: upon payment it becomes the landlord's property — out of your books; he zakat-counts it with his cash. Details: Ownership draws the line: the deposit returns to you at contract's end, so it remains your receivable even while the landlord holds it; advance rent is final payment for the lease and is no longer yours. The same principle covers business security money, tender deposits and utility deposits: refundable = your asset; non-refundable = an expense. Evidence: Quran 9:103 (zakat on owned wealth); the athar of Uthman on receivables (Muwatta, Zakat) with the money-zakat principle of Sahih al-Bukhari 1454; the Permanent Committee and contemporary scholars on refundable deposits belonging to the depositor. For complex individual cases, consult a qualified scholar.