Discuss how the horizontal devolution criteria balance equity and efficiency among States.

Horizontal devolution decides how the States' 41% share of the divisible pool is split among them. The 16th Finance Commission (FC), set up under Article 280, recommended this share for 2026-31 [1]. The formula has two aims: closing the fiscal-capacity gap of poorer States (equity) and rewarding States that grow and govern well (efficiency).

Equity-oriented criteria

• Income distance has the largest weight, at 42.5% [2]. States whose per-capita GSDP is furthest below the top States get more.
• Population (Census 2011) and area measure how much it costs a State to deliver services. Large, poor States therefore receive more.
• In the October 2026 advance instalment, Uttar Pradesh (₹19,208 cr) and Bihar (₹10,845 cr) received the most, while Sikkim received ₹365 cr [3].

Efficiency-oriented criteria

• Demographic performance rewards States that brought down fertility. Without it, southern States would lose out for controlling population.
• Contribution to national GDP is a new criterion. It replaces "tax and fiscal effort" [2] and rewards economic dynamism, which partly answers the complaint that richer States subsidise poorer ones.
• Forest cover rewards States for the ecological services they provide to the whole country, which mostly brings them development costs.

Where the balance strains

• Equity still dominates. High-contributing States say they get back much less than they generate. This erodes their sense of fiscal fairness.
• Perverse incentive: a State that grows faster narrows its income distance, so its share falls.
• Outdated data: a population base from 2011 may misstate current need.
• More pressure on the formula: the 16th FC recommended no revenue deficit grants [1]. The devolution formula now carries most of the equalisation burden, so the weights matter more than before.

Way forward

• Gradually shift weight towards efficiency criteria, while giving a minimum floor to special-category and small States.
• Revise the population and income data once the next Census is available.
• Link part of the transfers to outcomes, as the 16th FC already does for local body grants [2].

The criteria form a calibrated compromise: equity sets the base and efficiency adds incentives. Revising the weights periodically, based on evidence, can keep both convergence among States and their competitiveness intact. This would serve the spirit of cooperative federalism and SDG-10 (reduced inequalities).