WW LIVE
GGN·SEC43₹8,200/sqft▲ +2.3%│GGN·DLF-5₹14,400/sqft▲ +0.8%│NOIDA·SEC137₹6,800/sqft▲ +1.1%│NOIDA·SEC150₹9,200/sqft▲ +3.2%│DELHI·DWARKA₹12,500/sqft▼ −0.8%│DELHI·VASANT₹18,000/sqft▲ +0.5%│DELHI·ROHINI₹9,800/sqft▲ +1.4%│FARIDABAD₹4,800/sqft▼ −0.3%│GHAZIABAD₹5,400/sqft▲ +1.8%│REPO RATE6.50%RBI│DELHI·CIRCLE₹67,200/sqmFY25-26│GGN·CIRCLE₹55,000/sqmFY25-26│CRE·YIELD7.2–8.8%▲ NCR avg│WW·REPORTS50K+ sims▲ IRR avg│GGN·SEC43₹8,200/sqft▲ +2.3%│GGN·DLF-5₹14,400/sqft▲ +0.8%│NOIDA·SEC137₹6,800/sqft▲ +1.1%│NOIDA·SEC150₹9,200/sqft▲ +3.2%│DELHI·DWARKA₹12,500/sqft▼ −0.8%│DELHI·VASANT₹18,000/sqft▲ +0.5%│DELHI·ROHINI₹9,800/sqft▲ +1.4%│FARIDABAD₹4,800/sqft▼ −0.3%│GHAZIABAD₹5,400/sqft▲ +1.8%│REPO RATE6.50%RBI│DELHI·CIRCLE₹67,200/sqmFY25-26│GGN·CIRCLE₹55,000/sqmFY25-26│CRE·YIELD7.2–8.8%▲ NCR avg│WW·REPORTS50K+ sims▲ IRR avg│

Open Methodology

Methodology Errata & Changelog

Every change to the White Warp engine methodology is logged here, dated, and tied to the SHA-locked engine version. We publish errata when we find a bug or improve a calculation — including which past reports were affected.

Date
Engine
Change
Reports affected
Action
2026-05-13
v2f40ab9
True IRR replaces money-multiple CAGR
Pre-T288 reports used (revenue/cost)^(12/months) − 1 which overstated IRR by 2–44 pts depending on presale schedule. Reverted deterministic IRR to CAGR after T291 verifier showed MC IRR diverged.
All reports prior to 2026-05-13
Re-run via Portal
2026-05-13
v2f40ab9
Cashflow + RERA escrow
Added scientific curve selector (4 RERA-compliant presale curves) and 70% RERA escrow ring-fence per §4(2)(l)(D). Lowered headline IRR from ~67% to ~39% for typical NCR builder floor.
All builder-floor reports prior to T288
Fixed
2026-05-13
v2f40ab9
LTCG rate corrected to Finance Act 2024
Pre-T288 used 20% with linear-heuristic indexation. Post-Finance Act 2024 default is 12.5% no-indexation for transfers ≥ 23 Jul 2024. Pre-2024-07-23 acquisitions retain the option of 20%+CII.
Post-tax IRR in all reports prior to T288
Fixed
2026-05-13
v2f40ab9
Affordable housing carpet cap reversed
Pre-T288 notes said metro 90sqm / non-metro 60sqm; correct is metro 60sqm / non-metro 90sqm. Affected GST classification for Delhi/Gurugram/Noida small units.
Sub-90sqm unit reports in NCR
Fixed
2026-05-13
v2f40ab9
Stamp duty Haryana / UP
Pre-T288 used 5% (Haryana, UP); correct is 7%. Understated exit transaction cost by ~2pp.
Exit cost in Haryana / UP reports prior to T288
Fixed
2026-05-13
v2f40ab9
Gurugram DLF circle rates
Pre-T288 used ₹80,000/sqm; correct per Haryana 2025 notification is ₹127,000/sqm (DLF Phase 1–5) / ₹140,000/sqm (Golf Course Road). Premium-Gurugram comps understated 40%.
DLF / Golf Course Rd reports prior to T288
Fixed
2026-05-13
v2f40ab9
Delhi → UP IGRS routing bug
Circle-rate citation for Delhi projects accidentally routed to UP IGRS portal (Noida) due to substring match. Fixed in Session 3. Numeric value was still correct — only the citation source URL was wrong.
Delhi reports run between 2026-05-13 morning and afternoon
Fixed

Methodology

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