Yes, it's a good idea to put it in the lease. Remember that the deposit must be put in an interest-bearing account for the duration of the lease and given back to your tenant, plus the interest it has earned, when the tenant moves out. If, however, your tenant still owes you money on moving out, or if the property has been damaged beyond normal wear and tear, you can use the deposit to pay for repairs or to cover the money owed to you.