The former Chancellor received more than £30,000 for addressing two meetings in a single day in May.
His most recent paid speaking engagement was at the end of last month, when he was paid £10,200 for speaking at an event organised by Menzies Accountants. In September he received £7650 for speaking at an event organised by Ashurst LLP.
He has also spoken at events organised by the banking giants JP Morgan and Bank of America and accountancy firm PricewaterhouseCooper. One event took place in Monaco.
The Edinburgh South West MP is in demand for his insight into how the Treasury dealt with days and months around the global financial crisis in 2008.
His book on the subject, titled Back From the Brink: 1000 Days at Number 11, was published in 2011.
Mr Darling is represented by the same after dinner speaking company as the comedian Jimmy Carr and the BBC Newsnight presenter Jeremy Paxman.
The Labour MP has led Better Together, the campaign for a 'No' vote at the independence referendum, for more than a year. The position is unpaid.
All of the speaking payments were declared in the House of Commons register of members' financial interests.