India's Bitumen Imports Face Disruption Risk from Gulf Tensions

India's road construction sector faces mounting supply chain pressure as geopolitical tensions in the Gulf region raise concerns over the availability and pricing of bitumen, a petroleum-derived material central to road surfacing and pavement works, according to a note published Friday by India Ratings and Research (Ind-Ra).

The agency flagged that nearly 40% of India's bitumen is now sourced from imports, up from 30% at the start of the FY21–FY26 period, reflecting a structural shift in the country's supply base. Over 95% of those imports originate from Gulf suppliers — primarily the UAE, Oman, Iraq, and Iran. Any sustained disruption to shipping through the Strait of Hormuz, a narrow but strategically critical waterway through which a large share of global energy trade passes, could tighten supply and drive up costs for road contractors across the country.

The concern is not limited to price. Supply availability itself could be affected, particularly if disruptions are prolonged. Domestic bitumen production in India is directly linked to refinery crude throughput, meaning a fall in crude imports — itself a potential consequence of Gulf tensions — would simultaneously reduce domestic output. This removes a fallback option that contractors might otherwise turn to in the event of import shortfalls, compressing availability from both directions at once.

State Projects Most Exposed

State and regional road projects carry the highest vulnerability to these developments. Unlike projects under the National Highways Authority of India (NHAI), which benefit from better access to domestic supply networks and more structured procurement arrangements, state-level contractors typically maintain limited material inventories. Storage capacity constraints and working capital pressures mean many contractors keep only enough bitumen for immediate construction needs, leaving little buffer against supply shocks.

This structural difference in procurement capacity means that even a brief interruption in import flows could cause material shortages at project sites, stall pavement works, and disrupt construction schedules. The ripple effects could extend to state budget utilisation, as unspent funds tied to delayed projects create fiscal complications for state governments with fixed annual road expenditure targets.

National highway contractors, by contrast, have historically maintained stronger supply relationships and access to domestic refineries, reducing their dependence on imported material. Ind-Ra noted that national highway projects have minimal reliance on imported bitumen, providing a degree of insulation that state-level projects do not enjoy.

Peak Season Timing Adds Pressure

The timing of the current geopolitical uncertainty makes the supply risk more acute. India's peak road construction season runs from February to June, when dry weather conditions allow for intensive pavement work and bitumen demand surges across project sites. The current period of elevated tension in the Gulf coincides almost precisely with this window, leaving little room for contractors to absorb delays.

If supply constraints materialise during these months, construction progress could fall behind schedule in ways that are difficult to recover from within the same financial year. For state projects operating against annual budget cycles and contractor deadlines, delays during peak season carry a disproportionate impact on overall project timelines.

Cost Escalation Risk for Fixed-Price Contracts

On pricing, imported bitumen is currently 20–25% cheaper than domestically produced supply. This cost differential has been a key driver of the rise in import dependence over recent years. If import routes are disrupted and contractors are forced to shift to domestic sources — or if rising crude prices push up production costs globally — the landed cost of bitumen could increase significantly.

Ind-Ra estimates that a sustained 20% increase in bitumen prices would raise overall project costs by 1.5–2.5% for NHAI's hybrid-annuity model (HAM) contracts, where bituminous works account for 8–12% of total costs. While this is a meaningful increase, NHAI HAM projects carry structural protections that limit the financial damage. Their inflation-linked payment mechanisms allow a portion of cost increases to be passed through to project revenues, offering contractors some recovery against price shocks. Additionally, these contracts typically include a contingency buffer of up to 1% of total project cost, which Ind-Ra says largely offsets the near-term impact of a bitumen price rise at this scale.

State and regional projects do not benefit from comparable protections. Most operate under fixed-price arrangements, which means cost overruns are absorbed directly by contractors rather than shared with project authorities. Given that many contractors have bid on recent state project awards at narrow margins — a consequence of competitive tendering conditions in recent years — a sustained rise in input costs could erode project viability. In more severe scenarios, Ind-Ra warned that contractors could seek time extensions or that states may be forced to re-tender projects if cost structures become unworkable.

Broader Context: India's Road Infrastructure Push

The risk emerges against the backdrop of India's sustained investment in road infrastructure. The government has significantly scaled up highway construction targets over the past decade, with NHAI and state road agencies collectively awarding large volumes of construction contracts annually. Bitumen, as a core paving material, sits at the heart of this construction effort, and any sustained disruption to its supply or affordability has the potential to slow progress across a broad base of projects.

The sector has also seen increased participation from mid-sized contractors in state-level projects, many of whom have less financial depth than the large infrastructure groups that typically dominate national highway contracts. These smaller players are likely to be the first to feel the strain of margin compression if bitumen costs rise and supply tightens.

Bitumen accounts for only 0.23% of India's Wholesale Price Index basket, which limits the degree of inflation compensation available under index-linked contracts. Even where such mechanisms exist, as in NHAI HAM contracts, the compensation may not fully offset sharp, commodity-specific price spikes that are not broadly reflected in headline inflation.

Ind-Ra did not provide a timeline for when the current risks might ease, noting that the outlook depends on the duration and severity of geopolitical developments in the Gulf region. The agency indicated it would continue to monitor the situation, particularly as the construction season progresses into the coming months.