ANZ is still making up ground among business customers, almost a year after its controversial decision to shift the timing of its monthly interest rate decision.
The monthly DBM Consultants Business Financial Services Monitor (BFSM) shows the bank has improved its standing among business clients over the past four months but continues to languish behind the Commonwealth Bank, Westpac and National Australia Bank (NAB).
ANZ's average satisfaction rating rose 0.1 points 6.9 in October, on DBM's scale of 0-10.
But it was still below its average rating of 7.0 a year earlier.
The bank's satisfaction rating dived in December 2011 after it announced it would break with the three other major banks by reviewing its interest rates on the second Friday of the month.
Most banks announce any rate changes in the days following the Reserve Bank of Australia's interest rate decision, held on the first Tuesday of every month.
The BFSM - which surveys around 20,000 business decision makers annually - showed Westpac had the highest satisfaction rating among customers overall in October, with an average rating of 7.4.
CBA had the highest satisfaction rating among large and medium-sized businesses - with average ratings of 7.8 and 7.7 respectively.
DBM managing director Dhruba Gupta said Westpac had lifted its rating among large businesses significantly over the past six months but had lost ground among smaller businesses.
"What Westpac has picked up in the Large business sector, it has lost in the small (business) sector," he said.
"That would not be pleasing to the company's management team."
However, he said the bank retained the highest satisfaction in the micro-business sector (those with an annual turnover of less than $1 million), which accounts for the vast majority of businesses.