The PlayStation Network hack will cost Sony £105.5 million this year, the company has predicted.
Sony's PlayStation Network was hacked last month, leaving as many as 100 million accounts vulnerable. The attack left the PSN service down for several weeks, with Sony offering customers additional weeks of free access in compensation.
"Based on information currently available to Sony, our currently known costs associated with the unauthorised network access are estimated to be approximately 14bn yen in the fiscal year ending 31 March 2012," the company said in a forecast update ahead of its results later this week.
Analysts had estimated the total bill for the network breach to Sony could be as much as $24bn including legal charges, and could cost credit card companies and banks up to $300 million.
It wasn't clear if Sony was including any potential lost sales or lawsuits in its estimate.
Sony also laid out the potential cost of the Japanese earthquake. From the date of the disaster to the end of the fiscal year 20 days later, Sony chalked up charges of 12bn yen - mostly on life insurance and closed factories - as well as 5bn yen in lost sales.
Clean up and restoration of damaged buildings was estimated at 11bn yen, but Sony said its insurance would mostly cover those costs.
Over the next year, Sony expects the earthquake to knock its operating income by 150bn yen. However, Sony still expects sales to increase and operating income to be flat, while profit "is expected to be positive".
This article originally appeared at pcpro.co.uk