Bharti Airtel's rating headroom will narrow due to lower cash generation and high capex requirements in the financial year ending March 2018 (FY18), says Fitch Ratings. However, some of the pressure on Bharti and other incumbent Indian telcos should begin to fade this year, as the intense competition sparked by Reliance Jio's 2016 market entry begins to ease.

We estimate Bharti's FFO-adjusted net leverage will deteriorate to around 2.1x-2.3x in FY18, from 1.9x at FYE17-excluding USD 7.2 billion in deferred spectrum costs. This would move it closer to the threshold of 2.5x, above which Fitch would consider negative rating action. Bharti remains committed to maintaining an investment-grade rating and plans to sell a larger stake in its tower arm, Bharti Infratel, in FY19. Over the last 12 months, it has sold a total of 18.5% in Infratel for about USD 1.9 billion.

We forecast annual negative free cash flow USD 600 million-800 million during FY18-19, as Bharti's cash flow from operations will be insufficient to fund large capex requirements. It increased its capex guidance by USD1 billion to around USD 4 billion to strengthen its network infrastructure, particularly 4G, and to compete against Jio. The regulator's decision in January 2018 to extend deferred spectrum liability payment to 16 years from 10 will only partially ease cash flow pressures.

We forecast Bharti's revenue and EBITDA to rebound in FY19 driven by a likely improvement in the blended average revenue per user (ARPU) in the Indian mobile sector as data usage and tariffs rise. FY18 revenue and EBITDA are likely to decline by 10% and 15%, respectively, reflecting unprecedented competition that pushed down blended ARPU by 29% to an all-time low of Rs 123 (USD1.9) in the quarter ended December 2017. The slide in ARPU was also driven by the regulator's decision to reduce voice mobile termination rate by 57%, and was despite a 37% increase in voice usage per user per month and a fivefold increase in per user data usage to 5.3 GB per month (9M2016: 972 MB).

In Africa, Bharti's strategy to be either the number one or a strong number two in each market will boost its position and profitability over the long term. Its African operation is already growing strongly, with EBITDA in the region up by 24% in 9MFY17, and higher voice and data usage are likely to drive further gains in 2018.

The outlook for the Indian telco sector is improving, which could mean that the results in the quarter ended December 2017 marked a low point for Bharti and other incumbents. We revised the sector outlook to Stable in 2018 from Negative in 2017, as we expect competition to ease now that industry consolidation is all but completed. Three large telcos - Bharti, Jio and merged entity of Vodafone-Idea - have emerged from the shake-out. Their combined revenue market share will increase to around 90% in 2018, from 80% in 2017, as smaller telcos continue to exit.

Industry revenue growth is likely to be in the mid-single-digits, after a decline in 2017. The current low industry tariffs are unsustainable, and we expect they rise in 2018, as Jio switches its focus from gaining customers to making reasonable returns on its USD 31 billion investment in the sector.