The Flatmate Agreement in India: What to Put in Writing Before You Move Into a Shared Flat (2026 Guide)

Most flatmate disputes in India are not caused by bad people - they are caused by things that were never written down. A clear co-occupant agreement, covering rent split, deposit share, bills, house rules, and exit terms, takes an hour to prepare and can prevent months of awkward tension.

The flatmate agreement - sometimes called a co-occupant agreement or room-sharing agreement - is not a dramatic legal document. It is a one or two-page written record of things you and your flatmate have already agreed on, or need to agree on before moving in. Rent share, deposit contribution, who pays which bill, when guests are acceptable, what the notice period is if someone wants to leave early. These are conversations most flatmates have in passing. The ones that go smoothly are the ones where those conversations became a written record someone can refer back to.

India has no standard form for a flatmate agreement. Unlike the main rent agreement signed with the landlord, there is no government template, no mandatory registration requirement. That freedom is an advantage: you write exactly what works for your situation. This guide walks through what to include, in plain language, with particular attention to Bangalore - where deposit amounts and the cost-sharing math tend to be more complex than in most other cities.

Why "we'll sort it out" always fails

The most common flatmate arrangement in India is an informal one. Two colleagues decide to share a flat. They agree broadly on how to split the rent and say they will figure out the bills month by month. The first few months work fine because everyone is still being considerate. Then one flatmate starts working from home and the electricity bill doubles. One person's family visits for two months and the household expenses jump. One flatmate pays the Wi-Fi for three months and stops keeping track of who owes whom. Small resentments build quietly.

None of these problems requires a bad person to create. They are structural: when nothing is written down, each person operates from their own memory of what was agreed, and memory is unreliable and self-serving. A brief co-occupant agreement, signed by both parties before move-in, converts vague verbal commitments into a shared reference document that nobody can misremember.

This is especially relevant in Bangalore, where the 8-10 month security deposit means each flatmate is committing a significant sum of money upfront. Treating that commitment informally is a financial risk. If the arrangement falls apart six months in and there is nothing in writing about how the deposit is to be split or returned, the dispute resolution process is slower and more unpleasant than it needs to be.

The two documents in a shared flat: main lease vs. co-occupant agreement

Most shared flats in India involve two separate agreements, even if only one of them is formal. The main rent agreement is between the landlord and one or more named tenants. It covers the rent amount, security deposit, notice period, lock-in period, and any restrictions the landlord wants to include. This is the document that creates the legal tenancy relationship and is typically registered or stamped.

The co-occupant agreement (or flatmate agreement) is a separate, private document between the people actually living in the flat. It does not involve the landlord and does not need to be registered. Its purpose is to document how the flatmates have agreed to share costs, responsibilities, and space. If your name is the only one on the rent agreement, you are legally responsible to the landlord for the full rent and deposit - the co-occupant agreement distributes that responsibility internally and gives you a written record if you ever need to recover money from a flatmate.

Both documents can be kept short. A co-occupant agreement for two flatmates sharing a 2BHK might be no more than two pages. Have all parties sign it, ask a friend or neighbour to sign as witness, and each person keeps a copy. A photo on both phones is fine as backup. Under the Bharatiya Sakshya Adhiniyam 2023, electronic records including WhatsApp messages can be used as evidence in a civil dispute, so even a detailed written WhatsApp summary of agreed terms (confirmed by reply from both parties) has some evidentiary value - though a signed physical document remains stronger.

Note: This guide covers what to include in your co-occupant agreement. For general legal questions about your rights as a tenant, refer to the Model Tenancy Act 2021 or consult a legal professional. Rules vary by state.

What to write about rent and the security deposit

The rent and deposit section is the most important part of a flatmate agreement, and the place where disputes are most likely to arise if it is vague. Write down these specifics:

• Monthly rent split: The exact amount each flatmate is responsible for (for example, Flatmate A pays ₹18,000 and Flatmate B pays ₹14,000 towards a ₹32,000 rent). Not just "we'll split it."
• Who pays the landlord: One flatmate typically transfers the full rent to the landlord and the other flatmate pays them back. Document whose account the landlord's payment comes from, and by which date each person's share must be transferred.
• Late payment penalty (internal): If one flatmate is late transferring their share and it causes the overall rent to be delayed, you may want a small internal penalty or a clear rule about advance notice.
• Security deposit contribution: The exact rupee amount each flatmate is contributing to the total deposit paid to the landlord. In Bangalore, where 8-10 months of rent is normal, this could be ₹1 lakh or more per person - document it precisely.
• Deposit payment method: Both flatmates should pay their deposit share via bank transfer (not cash) so there is a digital record. Note the transaction dates and amounts in the agreement.
• When one flatmate leaves early: Who refunds the departing flatmate's deposit share, and from where? The landlord will not refund until the full tenancy ends, so the remaining flatmate typically refunds from their own funds and recovers the full amount from the landlord at the end of the lease. Write this down clearly.

If you are the flatmate joining a pre-occupied flat (rather than co-signing a new lease), the original tenant has already paid a full deposit to the landlord. In this case, the joining flatmate typically pays their proportional share of the deposit to the existing tenant, not to the landlord. Document this with a simple written receipt or UPI transaction with a note.

Bills and shared expenses: who pays what

Monthly bills are the most common source of low-level flatmate friction. The agreement should name every recurring expense and the split method for each:

The agreement should also specify the reimbursement date - for example, "Flatmate B transfers their share of all bills to Flatmate A by the 5th of each month." Keeping a shared expenses spreadsheet or using a split-expense app is useful in practice; the agreement just sets the rule.

For electricity, note who the registered consumer is with the BESCOM (Bangalore), BSES (Delhi), or relevant DISCOM. In most older properties only one name is on the account. The flatmate whose name is on the account is responsible for the bill; the agreement protects them internally by confirming the split.

House rules worth putting in writing

House rules are the section most flatmates skip because they feel awkward to raise before moving in. They are also the section whose absence causes the most awkward conversations three months after moving in. A written agreement normalises the discussion - both parties know these are standard questions, not personal criticisms.

Consider specifying:

• Guests and visitors: How often, for how long, and do they need to be registered with the RWA? Many Bangalore gated societies require prior intimation for guests staying more than a day or two.
• Overnight guests: Are they acceptable? For how many nights per month without prior discussion? This is worth a direct conversation, not an assumption.
• Noise hours: Most RWAs and Bangalore apartment complexes have informal quiet hours (typically after 10 PM). Write these in the agreement so there is a neutral reference.
• Kitchen use and cleanliness: Shared or assigned cooking time? Who cleans the kitchen after cooking? Refrigerator shelf allocation.
• Common area cleaning: Roster for cleaning shared bathroom, sweeping the living area, and disposing of wet waste and dry waste on the correct days (Bangalore BBMP mandates waste segregation).
• Personal items in shared spaces: No personal belongings left in the living room, hallway, or balcony without agreement.
• Parking: If there is one parking slot, who uses it? If there are two slots and one flatmate does not have a vehicle, can it be sublet to another society resident? (Check society rules.)
• Pets: Are pets allowed? This usually requires RWA consent under society bye-laws, and the existing tenant's agreement. If a new flatmate wants to bring a pet, this must be resolved before move-in.

We are now three months into the tenancy. No issues. Rent paid on time. The family has settled in well. The building watchman tells me they are good neighbours.

I am aware this is one experience, and good outcomes happen with brokers too. I am not suggesting the platform is magical or that every match will be seamless. What I am saying is that the information advantage alone is worth something significant. I knew who I was meeting before I met them. That changes the dynamic of the entire transaction.

The exit clause: what happens when one flatmate wants to leave

The exit section is the one most flatmates wish they had written when the time actually comes. The main lease with the landlord will have its own notice period (typically 30-60 days). The co-occupant agreement needs its own internal notice and process:

1. Notice period: How much advance notice must a flatmate give before leaving? Thirty days is common; some agreements use 45 or 60 days to give the remaining flatmate more time to find a replacement. Write this in the agreement.
2. Who finds the replacement: Is this the departing flatmate's responsibility, the remaining flatmate's, or shared? In practice, both parties usually help, but the agreement can specify who takes the lead and by what deadline.
3. Deposit refund mechanics: When the departing flatmate leaves, the landlord does not refund the deposit until the main lease ends. The remaining flatmate typically refunds the departing person's deposit share from their own pocket and recovers it from the landlord at lease end. The agreement should confirm this arrangement so there is no dispute about when payment is due.
4. Unpaid bills at exit: Any bills outstanding at the time of exit are settled before the departing flatmate receives their deposit share. Write this in to prevent a situation where one flatmate leaves without paying their portion of the last electricity or maintenance bill.
5. Condition of personal space: The departing flatmate leaves their room in the same condition as when they moved in. This mirrors the standard tenant-landlord principle of fair wear and tear under the Model Tenancy Act 2021.

A quick checklist: what your flatmate agreement should cover

Use this as a starting point before your first conversation with a potential flatmate:

• Names of all flatmates and start date
• Monthly rent split - exact amount per person and who pays the landlord
• Payment due date (to each other and to landlord)
• Security deposit - amount each person contributes, payment method, and what happens when one person leaves
• Electricity bill: account holder, split method, reimbursement date
• Internet: subscriber name and cost split
• Other bills: LPG, maintenance, water tanker, maid/cook
• Guest and overnight visitor policy
• Quiet hours and noise expectations
• Kitchen and common area cleaning arrangements
• Parking slot allocation
• Pet policy
• Internal notice period before exit
• Who leads on finding a replacement flatmate
• Deposit refund mechanics at exit
• Unpaid bill settlement before departure
• Signatures of all flatmates and date; witness signature optional but recommended

Finding the right flatmate in the first place

The flatmate agreement works best when the flatmate is the right fit to begin with. RenterFinder's platform now connects flatmate seekers directly - whether you have a spare room in a pre-occupied Bangalore flat or you are looking to join an existing household. Listings on RenterFinder go through AI and human moderated chat so both parties can have a detailed conversation before committing, without exchanging personal contact details until both sides show genuine interest. No broker involved, no commission on top of the arrangement.

Once you find the right flatmate, the co-occupant agreement is what keeps the arrangement running smoothly for the full lease period. An hour spent writing it down before move-in is worth considerably more than the months of awkward conversations it prevents.