Builder-Buyer Agreement vs Loan Agreement: What to Compare

When you buy an under-construction flat with a home loan, you sign two separate contracts with two separate parties: the agreement for sale (builder-buyer agreement) with the builder, and the loan agreement with your lender. The key fact to understand is that your EMI duty to the lender does not pause if the builder is late, and the builder's duties are not the lender's responsibility. So compare the two documents line by line: the payment schedule, possession date, delay interest, cancellation and refund terms, pre-EMI period and who pays whom.

This guide shows what each document controls, a comparison checklist, a worked example of a delayed project, and where to complain, based on the RERA Act, 2016 and RBI rules as of October 2026. State RERA rules differ in details, so read your state's model agreement.

Two contracts, two sets of obligations

Many lenders also add a tripartite agreement between you, the builder and the lender. It usually says the lender pays the builder directly, the builder will not create another charge on your flat, and on cancellation the refund goes to the lender first.

What the RERA Act says about your agreement for sale

• Section 13: a promoter cannot accept more than 10% of the cost as advance or application fee before a written agreement for sale is registered. The agreement must state the payment dates and manner, the possession date, and the rates of interest payable on default.
• Section 2(za): the interest a promoter can charge you for a default must equal the interest the promoter pays you for its own default.
• Section 18: if the promoter fails to complete or give possession as per the agreement, you can withdraw and get your money back with interest, or stay and receive interest for every month of delay until possession. The rate comes from state rules; many states use SBI's highest MCLR plus 2%.
• Section 19(6) and 19(7): you must pay as per the agreement, and delayed payments can attract interest at the prescribed rate.
• Section 11(4)(h): after executing the agreement for sale, the promoter cannot mortgage or create a charge on your flat, and any such charge does not affect your rights.

Our guide to under-construction vs ready-to-move flats covers the wider trade-off.

What the loan documents control

• Sanction letter and KFS: RBI requires a Key Facts Statement for retail loans, including home loans, sanctioned since 1 October 2024. It shows the annual percentage rate (APR), fees and the repayment schedule. Charges not in the KFS cannot be levied without your explicit consent. Read our explainer on loan APR and total borrowing cost.
• Disbursement: for under-construction property, RBI has told banks to link disbursals to construction stages and not to pay upfront for incomplete projects. Sanction is not disbursement; see home loan sanction vs disbursement.
• Pre-EMI vs EMI: until full disbursement, many loans charge interest only on the amount released. The pre-EMI vs full EMI guide explains the choice.
• Penal charges: since 1 April 2024, RBI rules allow lenders to levy reasonable penal charges on overdue amounts, but not penal interest added to the rate, and these charges cannot be capitalised.

Comparison checklist before you sign

1. Payment schedule vs disbursement plan. Does each stage in the agreement for sale have a matching disbursement condition in the loan or tripartite agreement? Watch for heavy payments due at "booking" or "agreement" before any construction.
2. Possession date vs your cash flow. If possession slips by a year, can you pay pre-EMI and rent together? Plan for that, because the EMI does not wait for the keys.
3. Delay interest both ways. Check that the rate you pay the builder for delay equals the rate the builder pays you, as Section 2(za) requires.
4. Cancellation and refund. Note the builder's forfeiture or cancellation clause (it must follow RERA and state rules) and how the tripartite agreement routes the refund. Ask how interest you have already paid the lender will be treated; it is usually not refunded by the lender.
5. Subvention or "no pre-EMI" offers. Read who pays pre-EMI, until when, and what happens if the builder defaults. The loan stays in your name.
6. Payee account. The builder's account in the agreement should be the designated RERA project account or the account named in the tripartite agreement; money should never go to a personal account.
7. Extras and taxes. Parking, club, maintenance deposit and GST may fall outside the loan. Make sure you have cash for them.
8. Loan sanction validity. If construction is slow, your sanction may lapse before the last stage. Ask how the lender handles this.

Worked example: a 12-month possession delay

Arjun booked an ₹80 lakh flat with a ₹64 lakh loan at 8.5%. By the agreed possession date, he had paid ₹66 lakh in total: ₹16 lakh of his own and ₹50 lakh disbursed by the lender. Possession is delayed by 12 months and Arjun chooses to stay in the project. Rates are illustrative.

The two flows are separate. Arjun must keep paying the lender ₹35,417 a month while he pursues the builder for delay interest through the state RERA authority. If he stops paying the lender because the builder is late, he risks EMI bounce charges, penal charges and damage to his credit score. Model your own figures in the EMI calculator.

When things go wrong

• Builder delays or defaults: send a written notice under your agreement, then file a complaint with your state RERA authority under Section 31. Keep proof of all payments and the builder's communications.
• Builder stops subvention pre-EMI: inform the lender in writing at once, keep paying to protect your credit record, and include the amount in your RERA claim. In 2025 the Supreme Court ordered a CBI probe into alleged builder-bank collusion in subvention projects in NCR, which shows how risky these structures can be.
• Lender disburses beyond the stage reached or levies undisclosed charges: complain to its grievance redressal officer. After 30 days, banks and NBFCs go to the RBI Integrated Ombudsman (cms.rbi.org.in); housing finance companies are outside that scheme, so use the National Housing Bank's GRIDS portal (grids.nhbonline.org.in).

What not to do

• Do not sign a tripartite agreement without reading the refund and default clauses.
• Do not assume a "bank tie-up" means the lender guarantees the builder's delivery.
• Do not stop paying EMIs as leverage against the builder.
• Do not transfer money to an account given over phone or WhatsApp; verify with the builder's office and report fraud at cybercrime.gov.in or 1930.

Key takeaways

• The agreement for sale binds you and the builder; the loan agreement binds you and the lender. Neither excuses the other.
• RERA requires the payment schedule, possession date and default interest in the agreement, and equal interest both ways.
• Under Section 18 you can claim monthly delay interest or a refund with interest from the builder.
• Keep paying the lender during disputes; in the example, pre-EMI of ₹35,417 a month continues while ₹58,850 a month is claimed from the builder.
• Read tripartite and subvention terms closely, and escalate through RERA for the builder and the lender's grievance channel, then RBI or NHB, for the loan.