A Bengaluru buyer taking a loan on an under construction flat expected to sign two documents, a builder agreement and a loan agreement, and was surprised when the bank produced a third that all three parties had to sign together. He had not heard of a tripartite agreement, yet it was the document doing the quiet work of protecting everyone at once. During construction he would not yet hold the flat's title, the bank would be releasing money against a building that did not fully exist, and the builder would be relying on that money arriving on time. The tripartite agreement is what makes those three interests fit together, and skipping past it is skipping the safeguard built for exactly his situation.

The short answer. A tripartite agreement is signed by the buyer, the bank and the builder when you take a home loan on an under construction property. It exists because, until the flat is built and registered, you do not yet hold the property documents, so the builder has to be brought into the arrangement between you and your lender. The agreement defines how the loan money flows, usually released to the builder in stages as construction progresses, how the flat secures the loan, and what happens if the builder or the buyer defaults. The trade off is nothing but reading it: the tripartite agreement is protection, not paperwork for its own sake, and understanding what it says tells you exactly how your money and your flat are secured.

What is a tripartite agreement?

It is a single agreement signed by three parties, the buyer, the lending bank and the builder, that governs a home loan taken on an under construction property. Where a completed flat can be bought and mortgaged with just you and the bank, an under construction flat cannot, because the thing being financed is still being built and its title has not yet come to you. The builder therefore has to join the arrangement, both to confirm the flat exists in the project and is allotted to you, and to accept the bank's interest in it. The tripartite agreement records that three way relationship: your purchase from the builder, your loan from the bank, and the bank's security over a flat that the builder is still constructing. It is standard for under construction purchases funded by a loan, and its whole purpose is to make a financing that would otherwise have gaps hold together cleanly. In practice the builder also uses this document to give its consent to the flat being mortgaged to the bank, which the builder must do because the unit is still legally within the project until it is conveyed to you. That consent, sometimes issued as a separate permission to mortgage, is part of what the tripartite structure delivers, and its absence is one reason a lender may decline to fund an otherwise attractive under construction unit.

Why does an under construction loan need three parties?

Because during construction the buyer holds a contract and a promise, not the property itself, so the lender needs the builder inside the arrangement to make its security real. When you buy a ready flat you can mortgage a property you own; when you buy one that is still going up, there is no completed asset yet in your hands to secure the loan. The builder is the party who controls the unit until it is delivered, so the bank needs the builder to acknowledge the loan, confirm your allotment and agree how the flat will be dealt with. For you, this closes a gap that two separate documents would leave open, since your builder agreement and your loan agreement each cover only two of the three parties. The tripartite agreement is the piece that binds all three, which is why lenders insist on it for under construction funding rather than treating it as optional.

What does the agreement actually protect?

The agreement protects each of the three parties in a different way, and it is worth seeing what each gets. The table below sets it out.

Read together, the agreement is a balancing of three interests that would otherwise pull against each other. The buyer wants the flat and safety for their money, the bank wants its loan secured, and the builder wants funding certainty, and the tripartite agreement gives each of them enough to proceed with confidence.

How does the loan money reach the builder?

The bank usually releases the loan to the builder in stages tied to construction progress, rather than paying the whole amount at the start. This staged, or tranche based, disbursement means money is advanced as the building reaches agreed milestones, so the bank is not funding a flat that has not been built and the buyer is not paying interest on a full loan long before the home is ready. The tripartite agreement is where this flow is set out, including that the funds go towards the construction of your specific unit rather than into the builder's general use. For a buyer, the practical point is to understand that disbursement is linked to progress, so delays in construction can delay disbursement, and to know that the staged structure is itself a protection, since it stops the entire loan being handed over before the building justifies it. Ask how the tranches are defined, because that schedule shapes both your interest and your exposure. It is also worth clarifying whether you pay only the interest on the amount disbursed so far during construction, a common arrangement, or the full instalment from the outset, since the two paths feel very different on a monthly budget while the flat is still being built.

What happens if the builder or I default?

The agreement sets out both situations, and each is the reason the other two parties wanted it signed. If the builder defaults or fails to deliver, the tripartite agreement gives the buyer and the bank a defined position rather than leaving them to argue from separate documents, which is a large part of the buyer's protection. If instead the buyer defaults on the loan, the agreement typically allows the lender to step into the buyer's allotted flat as its security, and the builder is bound to recognise the lender's claim rather than resist a change of owner. This is uncomfortable to read but important to understand, because it is precisely the clarity that makes the loan possible in the first place. Knowing in advance how a default by either side is handled lets a buyer weigh the commitment honestly, rather than discovering the terms only when something has already gone wrong.

What should a buyer check in a tripartite agreement?

Read it as carefully as the loan itself, because it governs what happens to both your money and your flat.

1. Confirm the flat, its number and the project are correctly identified as your allotment.
2. Check how and when the loan is disbursed to the builder in stages.
3. Confirm the funds are tied to the construction of your specific unit.
4. Read what happens if the builder delays or fails to deliver the flat.
5. Understand the lender's rights over the flat if you default on the loan.
6. Match the agreement's terms against your builder agreement and loan agreement.
7. Have a lawyer confirm the document protects your position before you sign.

How does this fit the EMI and subvention decisions?

The tripartite agreement is part of the machinery of an under construction loan, so it connects to the wider financing choices a Bengaluru buyer makes. Because disbursement is staged and interest builds as the loan is released, our guide to home loan EMI math at the current repo rate helps you see what the loan will actually cost, and our note on the no EMI till possession subvention scheme covers a related structure where the builder and bank arrangement shifts when you start paying. If you are financing an under construction project such as Sobha Oakshire in Devanahalli, read the tripartite agreement alongside your loan terms so you know how the money moves and how your flat is secured. The three documents, builder agreement, loan agreement and tripartite agreement, together describe your purchase, and none of them should be signed unread.

Frequently asked questions

What is a tripartite agreement in a home loan? It is an agreement signed by the buyer, the bank and the builder when you take a home loan on an under construction property. It exists because you do not yet hold the flat's title, so the builder must join the arrangement between you and your lender. It defines the loan disbursement, the security and what happens on default.

Why is the builder a party to my home loan? Because on an under construction flat there is no completed property yet to secure the loan, so the bank needs the builder, who controls the unit until delivery, to acknowledge the loan and your allotment. The builder joining the agreement is what lets the lender treat a flat that is still being built as security for your loan.

How is the loan disbursed on an under construction flat? Usually in stages tied to construction progress, rather than all at once, with the bank releasing money to the builder as agreed milestones are reached. The tripartite agreement sets out this staged flow and that the funds go towards your specific unit. Because disbursement follows progress, construction delays can delay the release of your loan.

What happens if I default on the loan? The tripartite agreement typically allows the lender to step into your allotted flat as its security, and the builder is bound to recognise the lender's claim. This is uncomfortable but it is what makes the loan possible, so it is worth understanding in advance how a default is handled rather than meeting the terms only after something goes wrong.

Last updated 2026-08-30. PropNewz Team.