Captive and Group Captive Power Plants in India: A Complete Legal, Financial, and Operational Guide
Captive and Open Access
Captive and Group Captive Power Plants in India: A Complete Legal, Financial, and Operational Guide
Captive and Group Captive Power Plants in India: A Complete Legal, Financial, and Operational Guide
Captive power is the cheapest large-scale clean energy a C&I consumer can buy in India today. Done right, it cuts your landed power cost by ₹2 to ₹4 per kWh against grid tariffs, locks that price for 25 years and shields you from cross-subsidy surcharge and most additional surcharge. Done wrong, it loses captive status, triggers retrospective surcharge demands and turns a savings plan into a liability.
The difference is almost entirely legal structuring. This guide walks through how the captive route works, the two ownership tests that decide everything and what changed under the Electricity (Amendment) Rules, 2026.
How does a captive or group captive power plant work in India?
A captive power plant is a generating station set up by a consumer to produce electricity primarily for its own use. Under Section 9 of the Electricity Act, 2003, a captive generator can supply power to itself without holding a distribution licence and is exempt from cross-subsidy surcharge on that power.
A group captive power plant lets multiple consumers share one plant. Several C&I units hold equity in a special purpose vehicle that owns the generator, then draw power against their shareholding. This is what makes captive viable for consumers who cannot fund a whole plant alone.
The entire model rests on two numerical tests in Rule 3 of the Electricity Rules, 2005. Meet both, every year, and you keep captive status. Miss either, and you lose the surcharge exemption for that year.
The two rules that decide everything
The 26 percent equity rule
The captive users, taken together, must hold not less than 26 percent of the equity share capital of the company that owns the plant. This is the ownership test. It proves the consumers genuinely own the generation, not just buy from it.
The 51 percent consumption rule
The captive users must collectively consume not less than 51 percent of the electricity generated, measured on an annual basis. This is the usage test. It stops the structure being a disguised power sale.
For group captive there is a third, tighter condition. Each individual captive user's consumption is capped at 100 percent of its proportional consumption, calculated against its share of total captive ownership in the plant. Draw more than your proportional share and the excess is treated as a supply of electricity by a generating company, attracting cross-subsidy surcharge and additional surcharge on that excess. This treatment is set out expressly in the Electricity (Amendment) Rules, 2026.
The amendment does drop the old rigid proportionality band for a consumer who crosses the 26 percent ownership threshold in the plant. Where a captive user holds at least 26 percent ownership in the plant, the proportional consumption condition does not apply to that user. That is a meaningful relaxation for anchor consumers who take a large stake.
Where ownership shifts during the year, each captive user's proportional consumption is worked out on its weighted average shareholding across the financial year. Design your offtake to that reality, not to a static year-end snapshot.
What changed under the Electricity (Amendment) Rules, 2026
The Electricity (Amendment) Rules, 2026, notified on 13 March 2026, replaced Rule 3 of the Electricity Rules, 2005 in full. Most provisions took effect on the date of gazette publication. The clauses covering individual proportional consumption, the 26 percent ownership exemption and the verification process took effect on 01 April 2026. The changes that affect your structuring:
Verification of captive status is now a formal process. Where the plant and the captive user sit in the same state, verification follows the procedure issued by the state-nominated nodal agency. Where they sit in different states, verification is done by the National Load Despatch Centre, run by Grid-India, under a procedure issued with central government approval.
Pending verification does not trigger surcharge automatically. Subject to a declaration filed by the captive user with the nodal agency or NLDC, cross-subsidy surcharge and additional surcharge are held off while verification is pending. If the plant then fails verification for that year, the applicable surcharges apply with late payment interest.
A grievance redressal committee constituted by the appropriate government now hears appeals against a verification outcome.
The practical effect: captive status is now audited harder and against a defined procedure. You cannot fix a broken consumption ratio in March. You design the offtake to hold through the year and you file the declaration on time to keep the surcharge exemption alive while verification runs.
Subsidiaries and holding companies can now aggregate captive demand
This is the single most useful structural change in the 2026 amendment for corporate groups. The amended Rule 3 now states that where a captive user is a company, its subsidiary or subsidiaries, its holding company and any other subsidiary of that holding company are all treated as a single captive user.
That matters in two ways.
First, for the 26 percent equity test and the 51 percent consumption test, the whole corporate group is counted together. A holding company can hold the equity while its subsidiaries consume the power, and both tests are assessed on the combined position. You no longer need each legal entity to independently satisfy the ownership and consumption arithmetic.
Second, in a group captive structure, the proportional consumption calculation treats a captive user, its subsidiaries, its holding company and that holding company's other subsidiaries as one captive user. So a group with three manufacturing subsidiaries can pool their draw against a single equity stake held anywhere in the group.
The definitions track the Companies Act, 2013, using Section 2(87) for subsidiary and Section 2(46) for holding company. If your operations run through multiple SPVs or plant-level entities under a common parent, this lets you build one captive plant against the group's aggregate load rather than fragmenting it. Model your consumption on the consolidated group draw, then decide where in the group the equity sits.
Inter-state group captive: now managed through Grid-India
Inter-state group captive lets you site a plant in a high-resource state, say Rajasthan or Gujarat solar, and supply consumers in a different state through inter-state open access. The economics can be excellent. Solar tariffs in resource-rich states run materially below what you would pay for the same captive plant near a low-irradiation load centre.
The complexity sits in coordination. Where the plant and captive users are in more than one state, captive status verification is now done by the NLDC at Grid-India under a central-approved procedure. This is cleaner than the earlier grey zone but it adds an interface. Budget for the scheduling discipline and the deviation settlement exposure that comes with inter-state drawal.
The financial case for captive
The saving comes from avoiding charges, not from a promotional tariff. As a captive user you avoid:
Cross-subsidy surcharge, often ₹1 to ₹2 per kWh depending on state and consumer category.
Additional surcharge in most states, subject to the prevailing state regulation.
Against a grid tariff of ₹8 to ₹10 per kWh for many industrial consumers, captive solar can land power in the ₹3.50 to ₹5 per kWh range over a long horizon, including wheeling and applicable charges. The exact number depends on your state, resource and structure, so model it; do not assume it.
Solar is where most of this capacity is now being built. Solar accounted for 56.4% of India's renewable capacity in the second quarter of 2026, per Mercom India (27 July 2026). EPC pipelines are deep too, with Waaree Renewable Technologies securing orders for 1,082 MWp of solar projects (SolarQuarter, 27 July 2026). Capacity and contractors are available. The bottleneck for C&I consumers is structuring, not supply.
Storage is increasingly part of the captive design. For a captive plant chasing higher self-consumption and firmer supply, paired storage is moving from optional to standard. The 2026 amendment recognises this, defining captive use to include electricity drawn through an energy storage system used to store the plant's output.
Captive solar plant regulations: the practical compliance checklist
The structuring matters more than the megawatts. Before you sign:
Lock the equity at 26 percent or above across captive users, and keep documentary proof of holdings.
Stress-test the 51 percent consumption test against your worst plausible production year.
For group captive, model each user's drawal against its proportional cap through seasonal swings, remembering that a user holding 26 percent or more of the plant is exempt from the proportionality condition.
Aggregate subsidiary and holding company demand where you have a group structure, and decide where the equity sits.
File the captive declaration with the nodal agency or NLDC to hold off surcharge while verification is pending.
For inter-state structures, map the Grid-India and state agency interfaces and the open access charges before you commit to a site.
Get these wrong and the surcharge exemption falls away. The financial model that looked like a winner becomes a retrospective demand notice.
What to do this week
Pull your last three years of monthly consumption data and your current all-in grid tariff including cross-subsidy and additional surcharge. Run a captive structure against it at a conservative ₹4 per kWh landed cost. If the gap is above ₹2 per kWh, captive is worth a formal feasibility study, and the consumption design is where you should spend your diligence. If you run a corporate group with multiple entities, map the aggregate group load first, because the 2026 amendment now lets you build one plant against the combined demand. If you are evaluating a group captive consortium, get the proportional consumption modelling done before you discuss equity, because that is the test that breaks most deals.
FAQ
What is the difference between captive and group captive?
A captive plant is owned and used by a single consumer. A group captive plant is owned by a special purpose vehicle in which multiple consumers hold equity and each draws power against their shareholding, subject to the 26 percent equity and 51 percent consumption tests in the Electricity Rules, 2005 as amended in 2026.
What is the 26 percent equity rule for captive power?
Captive users must collectively hold at least 26 percent of the equity share capital of the company owning the plant. For group captive, each user's consumption is capped at 100 percent of its proportional share, though a user holding 26 percent or more of the plant is exempt from that proportional cap under the Electricity (Amendment) Rules, 2026.
Can subsidiaries and holding companies pool their captive requirement?
Yes. Under the 2026 amendment, a captive user's subsidiaries, its holding company and that holding company's other subsidiaries are treated as a single captive user. The group's combined equity and combined consumption are assessed together for both the 26 percent and 51 percent tests.
Do captive power plants pay cross-subsidy surcharge?
No. Power consumed by a qualifying captive user is exempt from cross-subsidy surcharge under Section 9 of the Electricity Act, 2003. Most states also exempt qualifying captive consumption from additional surcharge, subject to state regulation.
Can a captive plant supply consumers in another state?
Yes. Inter-state group captive is permitted, with the plant in one state and consumers in another, using inter-state open access. Captive status verification for these arrangements is done by the National Load Despatch Centre run by Grid-India.
What happens if I miss the 51 percent consumption test?
The whole electricity generated is treated as a supply by a generating company for that year, and cross-subsidy surcharge and additional surcharge apply on that consumption. This is why the consumption ratio must be designed and monitored, not assumed.
How does Ampera Energy help structure a group captive deal?
Ampera Energy structures both inter-state and intra-state group captive arrangements end to end. We size the plant against your consolidated group load, design the equity and offtake so the 26 percent and 51 percent tests hold through the year, and file the verification declarations with the nodal agency or Grid-India. For consortium deals we also source the missing side of the table, matching creditworthy anchor consumers with vetted developers and SPV capacity so the proportional consumption modelling and equity split work before anyone signs. Talk to us at www.amperaenergy.in before you commit to a site or a stake.
