How much notice does a tenant or landlord have to give?
Whatever the agreement says — most commonly one to three months, and the same obligation usually runs both ways.
The notice period is set by the agreement, and one month is the most common for residential tenancies, with two or three months typical for commercial ones. Read your own agreement first: it governs, and it may require the notice in writing rather than by message or call.
A lock-in period is separate from notice. If the agreement has one, leaving inside it can mean paying rent for the remainder even after vacating, regardless of notice given. Lock-ins are common in commercial agreements and in residential ones where the landlord paid brokerage.
Where a state has adopted the Model Tenancy Act framework, a landlord must also follow its process to recover possession, and cannot simply cut utilities or change the locks. Self-help eviction is not lawful anywhere in India — possession is recovered through the agreed process and, if necessary, the courts or the rent authority.
General information about renting in India, not legal advice. Rules differ by state — check with your local Sub-Registrar office or a lawyer before acting on this.