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An Indian real estate developer selling residential apartments must apply either 1% GST (affordable housing under Notification 3/2019-CTR — carpet area ≤ 60 sq m metro / 90 sq m non-metro AND gross amount ≤ ₹45 lakh) or 5% GST (non-affordable) with a strict no-ITC condition under Section 17(5), while SRA and PMAY-CLSS projects also qualify for 1% irrespective of the general limits — and a single flat that breaches either boundary by a small margin jumps 5× in GST liability, exposing the developer to reclassification if the carpet-area register, agreement value and GSTR-1 filing do not reconcile.
For every registered flat, capture RERA carpet area (net usable floor area per Section 2(k), excluding balconies and shafts) and gross amount charged (agreement value inclusive of preferential location, car parking and one-time deposits) at the moment of booking; test both against the metro/non-metro carpet limit and the ₹45 lakh value limit; classify the flat as affordable (1%) or non-affordable (5%) and lock the classification in the flat master; apply the classification consistently across every milestone invoice; block all input tax credit on real-estate inputs against real-estate output; and reconcile the per-flat classification against GSTR-1 line-items and against the RERA-registered carpet area at every quarter.
Flat master keyed by RERA registration + tower + flat number with RERA carpet area in sq m, agreement value in ₹, metro/non-metro city classification, SRA/PMAY-CLSS flag, affordable/non-affordable classification and locked GST rate; boundary rule engine that applies Notification 3/2019-CTR conditions and flags flats within ±5% of either limit for review; invoice engine that reads the classification from flat master and forces 1% or 5% on every milestone invoice; ITC blocking rule at project level with real-estate output tag; GSTR-1 line-item reconciliation to flat-master classification; RERA carpet-area cross-check at quarter close.
A per-flat GST classification register with RERA carpet area, agreement value, metro/non-metro flag, SRA/PMAY-CLSS flag, resulting classification and applicable rate, and a boundary-proximity flag on flats within ±5% of either affordability limit; a monthly reconciliation of invoice GST rates to classification with drift alerts; a per-project blocked-ITC register showing input GST claimed vs blocked; a quarterly GSTR-1 vs flat-master classification tie-out; an audit-ready evidence trail per flat linking carpet-area certificate, agreement, invoice and GSTR-1 line-item.
A Bengaluru-headquartered developer closes a 240-unit residential tower and the CFO pulls the GST classification: 156 units at 1% affordable and 84 units at 5% non-affordable. Two units sit at 60.5 sq m carpet area with agreement value ₹44 lakh — booked as affordable, invoiced at 1%. The internal auditor flags them: RERA carpet area 60.5 sq m breaches the 60 sq m metro limit by 0.5 sq m, and the correct classification is non-affordable at 5%. On ₹44 lakh per unit the correction is ₹44,000 → ₹2,20,000 per unit — a ₹1.76 lakh GST liability increase per unit, ₹3.52 lakh across two units, with interest and penalty exposure under Section 74 if the misclassification is treated as suppression. Affordable housing 1 percent GST 5 percent real estate India is one of the highest-swing reconciliation surfaces in Indian real estate — the same flat carries either 1% or 5% GST depending on two simple lines that must be drawn per flat, per invoice, per GSTR-1 filing.
Quick reference
| Item | Value |
|---|---|
| Governing notification | Notification 3/2019-Central Tax (Rate) dated 29 March 2019 |
| Effective date | 1 April 2019 |
| Affordable rate | 1% (0.5% CGST + 0.5% SGST), no ITC |
| Non-affordable rate | 5% (2.5% CGST + 2.5% SGST), no ITC |
| Carpet area limit — metro | 60 sq m |
| Carpet area limit — non-metro | 90 sq m |
| Value limit | ₹45 lakh (gross amount charged) |
| Metros (per notification) | Bengaluru, Chennai, Delhi-NCR, Hyderabad, Kolkata, Mumbai |
| SRA / PMAY-CLSS | 1% irrespective of general limits |
| ITC condition | Blocked (Section 17(5) reinforced by notification) |
| Post-completion certificate sale | Nil GST (Schedule III Entry 5) |
| GSTR-1 filing | Line-item classification affordable vs non-affordable |
The reconciliation in one paragraph
Every residential flat sold pre-completion-certificate in India carries GST under Notification 3/2019-CTR at either 1% (affordable) or 5% (non-affordable), with no input tax credit on either rate. Affordable is defined by two hard conditions that must both be met: RERA carpet area not exceeding 60 sq m in a metropolitan city or 90 sq m in a non-metropolitan city, AND the gross amount charged for the apartment not exceeding ₹45 lakh. Breach either condition — a 60.5 sq m carpet area, or a ₹45.5 lakh agreement value — and the same flat jumps to 5% GST, a five-fold swing on the tax on that flat. SRA and PMAY-CLSS projects enjoy the 1% rate irrespective of the general limits under a separate paragraph of the notification. Reconciliation must tie, per flat: the RERA carpet area, the agreement value, the classification applied on every milestone invoice, the GSTR-1 line-item, and the RERA registration carpet-area record. Post-completion-certificate sales are outside GST altogether under Schedule III Entry 5 — those flats do not enter this reconciliation.
What the affordable-vs-non-affordable classification looks like in India
The 1% / 5% structure applies to almost every residential real-estate developer with under-construction inventory. In practice the split by portfolio value looks roughly like this — illustrative, not sourced from a specific developer’s disclosures.
Large listed developers with mixed portfolios. A developer like DLF, Godrej Properties, or Prestige Estates typically runs multiple projects across metros — Delhi-NCR, Mumbai, Bengaluru, Hyderabad — with the majority of units in the non-affordable 5% band and a smaller affordable-housing pool. A luxury tower in South Delhi at ₹4 crore for 145 sq m carpet area is clearly non-affordable — 5% GST applies, ITC blocked. An affordable-housing tower in Sohna sector at ₹41 lakh for 58 sq m — 1% GST applies, ITC still blocked. The classification is stable across the project and locked into every milestone invoice from booking through handover.
Mid-market developers with concentrated affordable inventory. Developers like Puravankara (under its Provident brand for affordable) and Brigade Enterprises (under its BrigadeCornerstone label for value housing) run affordable towers within larger master-plans. The classification is set at project registration, and units are priced to stay within the ₹45 lakh gross-amount ceiling to protect the 1% treatment. A ₹43 lakh unit at 55 sq m — affordable, 1% GST. A ₹47 lakh unit at 60 sq m in the same tower — non-affordable, 5% GST — even though carpet area is within the limit, because the value threshold is breached.
SRA developers in Mumbai / MMR. Slum rehabilitation projects under the MahaRERA-aligned SRA framework in Mumbai qualify for the 1% treatment under Notification 3/2019-CTR paragraph 4 (xvi). Developers like Macrotech/Lodha and Sunteck operating SRA components within larger developments must tag the SRA-portion units separately in the flat master so the 1% rate can be applied irrespective of carpet-area / value limits.
Boundary-edge developers. The riskiest classification is at the boundary — a developer with a project priced at ₹42-44 lakh per unit at 58-61 sq m carpet area. Some units qualify, some don’t, and even a small architectural change during construction (a re-measurement showing 60.5 sq m instead of 59.5 sq m) can swing an affordable-classified flat into the non-affordable band. Reconciliation must monitor these flats specifically.
The regulatory overlay
Notification 3/2019-Central Tax (Rate) dated 29 March 2019. Effective 1 April 2019. The notification recast the GST treatment of real estate under-construction inventory. The old 12% rate (with ITC) was withdrawn for residential apartments booked on or after 1 April 2019. Replaced by two concessional rates: 1% affordable and 5% non-affordable, both without ITC. Ongoing projects at 1 April 2019 got a one-time option to continue with the old scheme (12% with ITC) or migrate to the new scheme (1% or 5% without ITC); post-2019 projects are all under the new scheme.
Affordable residential apartment definition. Paragraph 4 of the notification. Two conditions, both must be met: (a) carpet area does not exceed 60 sq m in metropolitan cities (defined as Bengaluru, Chennai, Delhi-NCR, Hyderabad, Kolkata, Mumbai) or 90 sq m in other cities and towns; and (b) gross amount charged by the builder is not more than ₹45 lakh. Carpet area follows the RERA definition — Section 2(k) of the RERA Act 2016 — which is the net usable floor area, excluding external walls, service shafts, balconies and open terraces. Super built-up area is not the measurement used.
Gross amount charged. Includes the base sale price plus preferential location charges, car parking charges attributable to the flat, one-time maintenance deposits, and any other charges attributable to the apartment. Does not include stamp duty or registration charges paid separately by the buyer. Developers who price units at, say, ₹42 lakh base but add ₹4 lakh in PLC and car parking should check that the ₹46 lakh gross amount does not breach the ₹45 lakh ceiling — if it does, the affordable classification is lost.
Slum Rehabilitation and PMAY-CLSS. Notification 3/2019-CTR paragraph 4 (xvi) extends the 1% rate to notified affordable housing schemes including SRA projects and PMAY-CLSS apartments, irrespective of the general 60/90 sq m and ₹45 lakh limits. The developer must maintain the state scheme notification reference and the beneficiary list.
Blocked ITC. Both the 1% and 5% rates come with a strict condition: no input tax credit. This is not a compliance option — the notification denies credit outright, and Section 17(5) of the CGST Act 2017 backs it up for construction of immovable property on own account. Cement GST, steel GST, contractor GST — all blocked. The 1% or 5% is effectively the net rate the developer collects and pays; there is no offsetting input credit to reduce cash outflow.
Post-CC sale — no GST. Under Schedule III Entry 5 of the CGST Act 2017, sale of a building where the entire consideration is received after the issue of a completion certificate (or after first occupation, whichever is earlier) is neither supply of goods nor supply of services — and therefore not subject to GST at all. See Completion certificate flat sale — no GST under Schedule III. This is a separate rail from the 1% / 5% reconciliation.
A worked example — illustrative numbers
Consider an illustrative developer running a project in Bengaluru (metropolitan city for the affordable test). Three units in the same tower, three different classifications.
Unit 1 — Clear affordable. Carpet area 58 sq m (below the 60 sq m metro limit). Agreement value ₹42 lakh (below the ₹45 lakh ceiling). Gross amount ₹42 lakh (no PLC, base parking included in base price). Classification: affordable. GST rate: 1% (0.5% CGST + 0.5% SGST). GST on ₹42 lakh = ₹42,000. ITC on cement/steel/contractor GST: blocked. Invoice line-item at 1%, GSTR-1 reports it under the affordable rate table.
Unit 2 — Clear non-affordable (luxury). Carpet area 145 sq m (well above 60 sq m). Agreement value ₹4,00,00,000 (well above ₹45 lakh). Classification: non-affordable. GST rate: 5% (2.5% CGST + 2.5% SGST). GST on ₹4 crore = ₹20,00,000. ITC on inputs: blocked. Invoice at 5%, GSTR-1 reports it under the non-affordable rate.
Unit 3 — Boundary breach. Carpet area 60.5 sq m (breaches the 60 sq m metro limit by 0.5 sq m). Agreement value ₹44 lakh (below the ₹45 lakh ceiling). Because both conditions must be met and the carpet-area condition is breached, Unit 3 falls into the non-affordable band. Classification: non-affordable. GST rate: 5%. GST on ₹44 lakh = ₹2,20,000. If the developer had misclassified this unit as affordable at 1%, the invoice would show ₹44,000. The under-collection is ₹1,76,000 per unit — plus interest under Section 50 at 18% per annum from the invoice date, plus penalty under Section 73 (non-fraud, 10% of tax) or Section 74 (fraud, 100% of tax) depending on the department’s characterisation. Across 10 boundary-breach units the exposure is ₹17.6 lakh plus interest and penalty.
Unit 4 — SRA rehabilitation component. Same project has an SRA component under the state slum rehabilitation scheme. Carpet area 62 sq m, allotment consideration ₹28 lakh. Under the general test, 62 sq m breaches the 60 sq m metro limit and the unit would be non-affordable. But under Notification 3/2019-CTR paragraph 4 (xvi), SRA notified projects qualify for the 1% rate irrespective of the general limits. Classification: affordable (SRA). GST rate: 1%. GST on ₹28 lakh = ₹28,000. Documentation: state SRA scheme notification reference, beneficiary list, unit allotment order.
Common reconciliation breakages
Super built-up area used instead of RERA carpet area. The single most common misclassification. A flat sold on 78 sq m super built-up (with a 30-35% loading factor) has a RERA carpet area of around 58 sq m — well inside the 60 sq m metro limit. But a flat sold on 82 sq m super built-up may still be within limits at 60 sq m carpet — or may be at 62 sq m carpet and out of limits. The GST test uses RERA carpet area only. The reconciliation must pull carpet area from the RERA registration / approved building plan, not from the marketing brochure.
PLC and car parking not added to gross amount. A ₹43 lakh base price plus ₹2.5 lakh preferential location charges plus ₹2 lakh car parking gives a gross amount of ₹47.5 lakh — above the ₹45 lakh ceiling. The classification is non-affordable. Developers who price the base low to stay under ₹45 lakh but then add PLC and parking often trip this — the affordable classification is lost on the gross amount test even when the base was within limits. See Preferential location charges (PLC) — GST treatment and Car parking charges — GST treatment.
Metro vs non-metro classification error. Delhi-NCR is a metropolitan city — that includes Gurgaon, Noida, Ghaziabad, Faridabad. A developer treating a Ghaziabad project as non-metro (and applying the 90 sq m limit) would misclassify a 78 sq m flat as affordable when the correct limit is 60 sq m and the flat is non-affordable. The notification-specified metros are the six listed — everything else is non-metropolitan and gets 90 sq m.
ITC not blocked. Some developers, particularly those with mixed inventory (commercial + residential), fail to project-level block the input tax credit. Cement GST claimed against affordable output invites Section 74 proceedings. The ITC block must be at project level with a real-estate output tag — commercial-project ITC is separately admissible.
GSTR-1 line-item classification drift. The invoice may correctly apply 1% but the GSTR-1 line-item entry may be booked under the wrong rate table. This is a filing error rather than a rate error, but it surfaces in Form GSTR-9C annual reconciliation and in Section 61 scrutiny. The reconciliation control is a per-flat classification lock feeding both invoice and GSTR-1 from the same flat master.
Boundary-breach reclassification during construction. An architectural change during construction — moving a wall, adjusting the balcony, altering the shaft position — can change the carpet area of a specific flat. A flat originally at 59.5 sq m may re-measure at 60.5 sq m after the change, breaching the affordable limit. Reconciliation must re-test classification against RERA re-registration carpet area and either re-invoice remaining milestones at 5% or absorb the difference.
Ongoing-project scheme election drift. Projects that were ongoing at 1 April 2019 had a one-time option to continue with the old 12%-with-ITC scheme or migrate to the new 1%/5%-without-ITC scheme. Some developers filed the migration option but continued to claim ITC operationally — a mismatch that surfaces in audit. Reconciliation must record the scheme election per project and enforce it.
Continue reading — Real estate cluster
- Completion certificate flat sale — no GST under Schedule III — the other side of the residential GST rail; post-CC sales exit the 1%/5% regime altogether
- Redevelopment project — alternate accommodation GST for existing tenants — SRA-adjacent redevelopment mechanics
- Real estate developer revenue recognition under Ind AS 115 — POC computation feeding into GST invoice cadence
- RERA escrow account reconciliation — 70% rule — the ring-fenced cash rail on the same registered units
- Preferential location charges (PLC) — GST treatment — PLC enters the gross-amount test
- Car parking charges — GST treatment — parking enters the gross-amount test too
- CAM common area maintenance GST — ₹7,500 threshold — post-handover society GST
- Stamp duty and registration reconciliation — outside the GST rail but ties to the sale record
How a reconciliation platform handles this
Running per-flat affordable-vs-non-affordable classification across a multi-project, multi-city portfolio is a data problem stacked on a compliance problem. Each project has hundreds of units, each unit has a RERA carpet-area record, an agreement value, PLC and car-parking add-ons that enter the gross amount, a metro / non-metro classification, potentially an SRA or PMAY-CLSS tag, and a locked GST rate that must flow into every milestone invoice through handover. Manual reconciliation across this surface — usually maintained in project-specific spreadsheets — fails at boundary flats where the classification is tight and at scheme-elected projects where the ITC block must be enforced. Purpose-built real estate reconciliation software India treats each flat as a keyed master with RERA carpet area, gross-amount composition, metro/non-metro flag, SRA/PMAY-CLSS flag, and locked classification; runs a boundary-proximity rule on flats within ±5% of either limit for review; and reconciles invoice GST rates to the classification at every milestone before invoice release. TransactIG carries presets for Notification 3/2019-CTR classification logic, RERA carpet-area cross-check, blocked-ITC project-level block, GSTR-1 line-item tie-back, and SRA / PMAY-CLSS scheme flags. Customer outcomes include match-rate improvement from 51% to 88% across GST rail reconciliations, with build in two-to-four weeks on AWS Mumbai (ISO 27001:2022). For the broader GST reconciliation surface across GSTR-1, GSTR-2B and GSTR-3B, see reconciliation software India.
Content authored by practitioners with experience at Amazon India, Intuit QuickBooks, and the Tata Group. Meet the team →
- ▸ CBIC — Notification 3/2019-Central Tax (Rate) — Notification 3/2019-CTR dated 29 March 2019 — effective 1 April 2019; residential apartment other than affordable at 5% (CGST 2.5% + SGST 2.5%) and affordable residential apartment at 1% (CGST 0.5% + SGST 0.5%), both with input tax credit not admissible
- ▸ CBIC — definition of affordable residential apartment — Notification 3/2019-CTR, paragraph 4 — carpet area not exceeding 60 sq m in metropolitan cities and 90 sq m in non-metropolitan cities, and gross amount charged not exceeding ₹45 lakh
- ▸ Central Goods and Services Tax Act, 2017 — Section 17(5) — Section 17(5) — blocked credits, including construction of immovable property (other than plant and machinery) on own account, which supports the no-ITC condition attached to the 1% and 5% concessional real estate rates
- ▸ Real Estate (Regulation and Development) Act, 2016 — Section 2(k) — Section 2(k) defines carpet area as the net usable floor area of an apartment, excluding external walls, service shafts, balconies and open terraces — this is the measurement the GST affordable test uses (not built-up or super built-up area)
- ▸ CBIC — Notification 3/2019-CTR paragraph 4 (xvi) — Slum Rehabilitation Authority (SRA) projects and PMAY-CLSS schemes qualify for the 1% affordable rate irrespective of carpet area / value limits, subject to state approvals and scheme-specific conditions