"This high cost is credit negative for the country's telecom operators because it will increase their debt and costs and reduce their ability to fund future expansion," said the global credit rating agency.
"Although we expect that the companies will raise tariffs in an effort to recover their spectrum costs, we believe the increases will be gradual, leaving the companies' debt levels bloated for some time," Moody's said in its March 30 issue.
Moodys also said that the growing demand for 3G data services will continue to drive companies' spectrum cost recovery and it expects operators to maintain rational pricing, rather than cutting prices in an effort to increase volumes quickly.
Government received total payment commitment of Rs 1,09,874.91 crore from seven leading telecom operators in spectrum auction which ended on March 25.
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"These payments will cause debt levels to rise significantly for most operators, including Bharti Airtel Ltd. (Baa3 stable) and Reliance Communications Limited (RCom, Ba3 stable), and will limit their ability to make additional investments over the next 12-24 months, possibly slowing the rollout of 3G/4G networks in India," Moody's said.
The rating firm said the companies will likely opt to defer their spectrum payments as it mitigates the effect on their cash flow.