Accountancy firm BDO has announced that its merger with rival PKF is now formally complete.

The merger, announced late last year, brings the two companies under the BDO brand as a global accountancy organisation aimed at the mid-market, with revenues of nearly £4m operating in 138 countries.

BDO ranked 6th in Charity Finance’s Audit Survey 2012, pulling in £1.28m of audit fees (including VAT) from a portfolio of 36 charity clients worth a combined £1.49bn. Twelfth-placed PKF brought in £644,485 worth of audit revenue from its £640m-earning 23 clients.

Combining the two companies’ 2012 results would move the collective body up to third in the table, with £1.92m of audit fees from a 59-strong client base worth £2.13bn.

Simon Michaels, managing partner of BDO, said of the merger: “It’s time for people to think again about BDO. Merging with a firm of the quality and size of PKF has created one of the strongest firms focused on the mid-market, with the breadth and depth to work with ambitious organisations that want exceptional service and access to impressive UK and worldwide networks."