This rise, signalled today in the latest Business Monitor from Bank of Scotland, followed a dip in turnover in the preceding three months. Both the services and production sectors enjoyed improved fortunes.
In the three months to August, 45% of firms surveyed by Bank of Scotland increased turnover, while 22% experienced a decrease and the remainder reported a static position.
The net 23% of firms reporting a rise in turnover marked a significant turnaround from respective balances of 8% and 3% recording a fall in revenues in the prior three months and in the same period of last year.
Official figures show that gross domestic product, in Scotland and the UK as a whole, remains significantly adrift of its peak ahead of the 2008/09 Great Recession.
Economic indicators have in recent months pointed to an acceleration of growth in output, although experts including Bank of England Governor Mark Carney have highlighted the fact that there is some way to go before regaining pre-Great Recession output levels.
In the latest Bank of Scotland Business Monitor, a net 24% of firms in the production sector reported an increase in turnover. A rise in turnover was reported by a balance of 22% of companies in the services sector.
However, the survey signalled a significant deterioration on the export front in the three months to August.
Of Scottish companies surveyed, 23% reported a fall in export activity and only 22% enjoyed an increase, with the production sector faring better than services on this front.
The net 1% of Scottish companies reporting a fall in export activity contrasted with a balance of 12% enjoying a rise in the preceding three months.
The survey showed that, overall, firms in both the production and services sectors predicted sharp increases in turnover over the next six months.
Donald MacRae, chief economist at Bank of Scotland, said: "The tentative rise in confidence identified in the previous business monitor has been realised with achievement in summer this year of the best quarter's results since 2007."