Industry analysts believe Sky may be forced to put its prices up to pay for the bumper new TV rights deal agreed with the Premier League last week.
Sky will pay £4.2 billion over three years to cover 126 live top-flight matches per season from 2016-17.
The combined £5.136 billion TV rights deal - which includes the £960 million BT has committed for 42 games per season - is up significantly on the current £3 billion package, which applies until the end of the 2015-16 campaign.
Sky has paid 83 per cent more than in the last auction, which was carried out in 2012, for a similar number of Barclays Premier League games, reports the Daily Mail.
Toby Syfret of Enders Analysis said the firm has made clear it will do what it can to absorb the extra cost.
However, he said the additional expenditure is a "big sum to recover".
Mr Syfret explained that if Sky passed the cost on to Sky Sports subscribers in full, it would result in a £10 per month additional charge.
He predicted this will not happen, but suggested Sky may levy an extra £1 per month on all customers, in a bid to recoup some of the outlay.
Analyst Joshua Raymond, Chief Market Strategist at City Index, believes Sky may have paid more than necessary for Barclays Premier League coverage, fearing a challenge from BT Sport.
The TV rights were sold in a blind auction, meaning none of the parties knew how much their rivals were willing to pay for the same fixture packages.
Mr Raymond claimed BT gave the impression it was willing to outbid Sky, in order to push the price of the main fixture bundles upwards and increase Sky's costs.
"Sky has been duped into over-paying significantly and it's now likely that its subscribers will have to absorb at least some of the additional cost as a result," he warned.