South Suffolk MP Tim Yeo purchased two new computers and monitors at a cost of £1,319 – just months before he is set to leave Parliament.
Mr Yeo purchased the equipment at the end of August despite the fact he will no longer be an MP after the election in May.
He was deselected by the South Suffolk Conservative Association in February after being accused of not spending enough time in his constituency.
Mr Yeo has not broken any rules as the computers were bought before a September 30 deadline, which prevents public funds being used for expensive equipment six months before a general election.
MPs are advised to pass on IT equipment to their successors or to a charity, but this is only guidance.
Mr Yeo was unavailable for comment this week.