ANZ ranks lowest for business customers April 22, 2013 - 8:05AM The Commonwealth and Westpac rank highest for customer satisfaction among the big four banks, while ANZ and National Australia Banks are still languishing. A monthly survey of satisfaction among the big four's business customers shows the Commonwealth and Westpac tied for first place with an average satisfaction rating of 7.4 out of 10. By contrast NAB had an average satisfaction rating of 7.0, but ANZ ranked lowest with an average score of 6.9. The monthly DBM Consultants' Business Financial Services Monitor (BFSM) shows the Commonwealth had the highest satisfaction rating for small, medium and large businesses and was tied with Westpac among micro businesses. DBM Managing Director Dhruba Gupta said ANZ was still making up ground with business customers after a difficult 2012. Satisfaction with ANZ dropped sharply after the bank shifted the timing if its monthly interest rate decision away from the Reserve Bank of Australia's board meeting. Mr Gupta said the bank's recent pledge to lend $1 billion to start-up businesses over the next year may help to improve its standing. "It will be interesting to see if ANZ's pledge will impact positively on its business customers' satisfaction levels," he said. The BFSM is based on interviews with 20,000 businesses a year.