The ACT was the only state or territory to record a fall in sales during November, according to a survey of credit card and EFTPOS transactions processed through a major bank.
The Commonwealth Bank has found sales figures in the ACT were down 0.1 per cent last month in trend terms.
That is compared with a 2.2 per cent rise nationally.
CommSec economist Savanth Sebastian says the weaker ACT figures for November are not a cause for concern.
"If you look at it from an annual perspective the ACT was actually the second strongest state behind South Australia, with sales up 9.9 per cent over the year," he said.
"So that certainly seems to suggest that overall the ACT economy is doing relatively well from a business activity sense."