OPEC+ has delayed its review of oil production capacity after the recent Iran war disrupted expansion plans, according to sources cited by The Business Standard.

The producer group had been working through a long-running reassessment of member states' proven crude output capacity — an exercise that determines each country's quota baseline within the alliance's production agreement. That review is now off its earlier timetable, sources said, after the conflict involving Iran upended plans by several members to expand output.

The capacity review matters commercially because OPEC+ allocates production targets in part against each member's assessed sustainable output level. Any recalculation would shift quota entitlements across the group — relevant not only to the Gulf producers but to partners such as Russia, Kazakhstan, and several West African and Latin American members whose entitlements hang on the outcome.

Iran sits at the center of the disruption. The war interrupted Tehran's own capacity expansion ambitions and injected uncertainty into how the group benchmarks output potential in a period when export infrastructure and field operations in the region came under direct threat. Sources did not specify which other members' expansion programs were affected.

The Business Standard attributed the report to sources familiar with the matter; OPEC and the Iranian oil ministry have not published a revised schedule for the review. The delay leaves the existing quota architecture in place for now, even as several members press ahead with capacity growth projects that would, under a completed review, argue for higher baselines.

For crude markets, the timing question is a live one. A delayed review defers any decision on redistributing production entitlements — a decision that would bear directly on how quickly the group can bring barrels back after its series of output increases. Traders will treat the postponement as an analysis point, not a fact on supply: the physical impact depends on which expansion projects were actually slowed by the conflict and for how long.

No new date for the capacity review has been announced. Watch for the next OPEC+ ministerial gathering — and any ministerial committee meeting that precedes it — for word on whether the assessment resumes on a defined schedule, and for OPEC monthly reports that may quietly adjust member capacity figures in the interim.