The West Bengal Premises Tenancy Act sets no rigid ceiling on the security deposit, but in practice an amount of two to three months' rent is treated as reasonable by the courts. An excessive demand can be objected to, and on vacating the premises the landlord must account for the deposit and refund it, subject only to legitimate deductions.
Rent increase is a frequent point of friction between the parties. Where the agreement fixes a rate, the landlord must follow the recorded terms, and where the Act applies, any enhancement of the rent is subject to the prescribed procedure rather than to an arbitrary demand that is supported by cutting off utilities or by creating harassment.
On termination the tenant should obtain a written acknowledgment of the keys being returned and of the premises being handed over in good condition. This protects the tenant against a later claim for damages, and the landlord avoids withholding the deposit without a documented reason, a step that so often leads to a recovery suit.