Henry Tattersall was told he would not get any Christmas presents when he mistakenly downloaded Xbox games worth 420 pounds last November, an inquest was told.
Minutes before hanging himself, the boy spoke to his girlfriend on Facebook and said: "I'm going to kill myself."
His mother, Eve, from Newchurch, Lancashire, told the inquest her son was "genuinely stunned" by the amount of money he had spent.
He even suggested that his mother take the money out of his savings account.
"He was very upset that I was upset," she was quoted as saying by 'metro.co.uk'.
Coroner Richard Taylor, sitting in Burnley, said Henry's death was the "unexpected conclusion of an intended action," with a verdict of death by misadventure recorded.