GSDP data from 2015 to 2025 reveals an acceleration in inter-state inequality — and the policy choices that are driving it.
India's national GDP growth story obscures a fracture running through its federal architecture. Between 2015 and 2025, Karnataka's per-capita GSDP grew at 9.2% CAGR. Bihar's grew at 5.8%. The gap is widening — and it is not explained by base effects alone.
GSDP Divergence Since 2015
DataDood compiled GSDP data from MoSPI's state-level accounts for all 28 states over the decade 2015–2025. The Gini coefficient of state-level per-capita GSDP has risen from 0.31 in 2015 to 0.39 in 2025 — a significant widening by any measure.
All GSDP figures are at 2011-12 constant prices. Source: MoSPI State Domestic Product statements, accessed July 2026. Population denominators from Census 2021 interpolated projections.
When the richest Indian state is 8x more productive per capita than the poorest, federation is doing something very different from redistribution.
The Manufacturing Cluster Effect
Tamil Nadu and Gujarat have both built manufacturing clusters that create self-reinforcing agglomeration effects. Tamil Nadu's automobile corridor between Chennai and Hosur has attracted ₹1.2 lakh crore in investment since 2018. This creates supplier networks, skilled labour pools, and infrastructure that make subsequent investment cheaper — a virtuous cycle that landlocked states cannot easily replicate.
Southern Outperformance
Every southern state — Tamil Nadu, Kerala, Karnataka, Andhra Pradesh, Telangana — ranks in the top 10 for per-capita GSDP. This is not coincidence. Higher literacy rates (driven by decades of education investment), better healthcare outcomes reducing productivity loss, and coastline access for trade all contribute. Telangana's IT-driven growth adds a replicable model: aggressive SEZ policy combined with urban infrastructure.
BIMARU States: Is the Narrative Stale?
Bihar's GSDP has grown faster than the national average for four consecutive years. Rajasthan and MP have both attracted significant manufacturing FDI post-2022. The BIMARU framing — Bihar, MP, Rajasthan, UP as structurally backward — may be increasingly misleading. But per-capita income gaps remain enormous: UP's per-capita GSDP is still less than a third of Maharashtra's.
Policy Levers
The Finance Commission's horizontal devolution formula, which weights inverse income for equalisation, is the primary federal redistribution mechanism. But its impact is limited: it cannot compensate for infrastructure gaps, geography, or institutional capacity differentials built over decades. The states pulling ahead are doing so through policy choices — land acquisition reform, single-window clearances, industrial corridor investment — that lagging states have been slower to adopt.
