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Calculate an illustrative delay-interest amount using the State/UT rate and convention you have verified, while preserving the section 18 remedy context.
Enter the facts and calculate. The result appears here.
Calculate an illustrative delay-interest amount using the State/UT rate and convention you have verified, while preserving the section 18 remedy context.
Section 18 of the Real Estate (Regulation and Development) Act gives important remedies where the promoter fails to complete or give possession in accordance with the agreement/Act. The applicable interest rate is prescribed through the relevant rules, which can differ by State/UT.
For that reason, this calculator does not publish one “India RERA interest rate”. The user must enter the rate and convention verified from the applicable State/UT rules, authority order or case documents.
The correct delay start date can also be disputed. Agreement possession date, grace period, force-majeure extensions, revised regulatory timelines and the relief chosen can affect the period. The tool therefore exposes dates rather than hiding assumptions.
Treat the amount as a working paper for negotiation, complaint or professional review. It is not an order of the RERA Authority and does not decide entitlement, refund, possession or compensation.
Every field below changes the result. They are listed exactly as the form asks for them.
| Field | Type | What it controls |
|---|---|---|
| Amount paid to promoter | Number | |
| Delay start date used for your case | Date | |
| Calculate through | Date | |
| Verified applicable annual interest rate (%) | Number | |
| Calculation convention verified for the case | Choice | 2 options: Daily simple interest / 365; Completed calendar-anniversary months / 12 (end-of-month clamped) |
Illustrative interest = amount paid × verified annual rate × verified delay convention. Daily mode uses elapsed days/365; monthly mode counts only completed full months between the entered dates. The rate and convention are not hard-coded nationally because State/UT rules and case context matter.
The engine validates required values before calculating and rejects impossible combinations instead of converting them to zero silently. Dates, thresholds and category switches that drive the result remain visible to the user.
The logic on this page is built from the instrument(s) below. Where a rule did not clearly cover a scenario, that scenario is excluded rather than estimated.
The most common error in regulated calculations is not arithmetic; it is putting the facts into the wrong legal or product category. Check the transaction, entity, holding, policy or taxpayer classification before relying on the number.
Keep statements, acknowledgements, invoices, policy schedules, complaint IDs, tax workings or orders that support the inputs. A number without an evidence trail is difficult to defend in a complaint, return, claim or review.
Rules can change. This page records a source-check date, not a fabricated professional review date. If the event belongs to an older period, confirm that the rule version used here applies to that period.
Because the prescribed interest framework is implemented through State/UT rules and must be verified for the relevant jurisdiction.
Use the legally relevant date from the agreement/orders and consider valid extensions; the calculator cannot decide that dispute.
It contains remedy consequences relating to failure to complete/give possession; exact relief depends on whether the allottee withdraws and the facts.
No. Select the convention supported by the applicable rule/order or professional calculation.
It can produce a transparent arithmetic working, but entitlement and the accepted period/rate are legal issues.
Source links below are the authority trail used to design the current rule logic. They remain more important than a generic secondary explainer.
Source checked: 14 August 2026. This denotes source verification for the package, not CA/legal review or approval of the individual case.
These cover adjacent decisions. Each owns a different question, so use the one that matches your actual event.
This calculator is published for general information and educational purposes only. It is not legal, tax, accounting or investment advice, is not personalised to your circumstances, and is not a substitute for reading the governing instrument or taking professional advice on your facts. Finin2min records a source-check date, which denotes verification of the authority trail and not a professional review or approval of any individual case.
Scope: Computes interest on delayed GST tax payment under Section 50 of the CGST Act.
Review status: reviewed and approved by CA Nikhil Gupta on 19 July 2026.
Background, worked examples and the rules behind these numbers.