Weak rupee, higher fuel costs, Iran war weigh on IndiGo's FY27 outlook

Geopolitical tensions, rising crude prices and rupee depreciation prompt brokerages to cut IndiGo's earnings estimates for FY27 despite stable demand outlook

The stock of InterGlobe Aviation (IndiGo), the country’s largest listed airline, has slipped 18 per cent to ₹3,943 a share since the start of the Iran war. While flight duty time limitation norms had already hit their 2025–26 (FY26) third-quarter (October–December/Q3) performance, the market leader now faces demand, cost, and revenue pressures in the fourth quarter (January–March/Q4) of FY26 and in 2026–27 (FY27), owing to hostilities in the Gulf. Reflecting this, brokerages have trimmed margin and net profit estimates for Q4 and FY27.

 

These pressures are likely to weigh on the stock, though the appointment of William Walsh as chief executive officer — replacing Pieter Elbers, who resigned on March 10 — could lend some stability.

 

 

The most immediate hit is to revenue. Analysts at Motilal Oswal Research, led by Meet Jain, observe that the escalation in the US-Iran conflict since late February, along with the continued closure of Pakistan’s airspace for Indian carriers, has effectively disrupted IndiGo’s West Asia operations and large parts of its European network. This has led to restrictions across a corridor that carries roughly a quarter of global international passenger traffic.

 

The suspension of Gulf routes — which contribute 18-20 per cent of annual revenue (₹14,500–16,000 crore) — not only affects current travel but also dents bookings, creating a revenue shortfall in Q4FY26.

 

Costs, meanwhile, are rising sharply. Brent crude prices have surged over 60 per cent, from under $70 per barrel earlier this year to above $115. Aviation turbine fuel prices, which track crude, rose in March after declines in January and February. Every $1 per barrel increase in crude trims profitability by about ₹360 crore, Motilal Oswal estimates, pegging the incremental fuel cost impact at around ₹1,600 crore. Fuel accounts for nearly a third of IndiGo’s total costs.

 

The cost pressure is compounded by a weaker rupee and higher non-fuel cost per available seat kilometre (CASK). ICICI Securities observes that CASK (excluding fuel) rose to ₹3.17 in the first nine months of FY26 from ₹3.09 in 2024-25. It estimates CASK at ₹3.54 for Q4FY26, moderating to ₹3.4 in FY27 and Rs 3.37 in 2027-28 (FY28).

 

Beyond inflation and currency weakness, higher capital expenditure and finance lease obligations are likely to limit gains in cash flows and margins, the brokerage said.

 

Accounting for higher fuel costs, rupee depreciation, and weaker international operations — which hurt operating leverage — Motilal Oswal has cut its FY26 and FY27 operating profit (before rentals) estimates by 7 per cent each. Net profit estimates have been lowered by 31 per cent for FY26, 15 per cent for FY27, and 10 per cent for FY28.

 

Even so, the brokerage has retained a ‘buy’ rating, though it has reduced its target price to ₹5,500 per share.

 

ICICI Securities also maintains a ‘buy’ call but has cut its target price to ₹5,210 from ₹5,680. It said higher crude prices and refining spreads, along with the rupee’s depreciation, have pushed up cost assumptions, partly offset by fare increases. Its FY27 estimates reflect a sharp downward revision, while FY28 projections remain unchanged on expectations of a partial recovery in spreads and volumes.