Retail spending remained brisk last month, with electronic card transactions in the core retail sector, which excludes vehicle fuels, rising 0.8 per cent on February, seasonally adjusted.
For the March quarter as a whole core retail sales paid for by credit, debit or charge cards were up 2.7 per cent on the previous three months - the fastest quarterly growth since December 2006 - and up 7.2 per cent on the same quarter last year.
In real terms the growth is strong as estimates of annual inflation over the same period (to be reported on Monday) are very low, with ASB and Westpac economists picking 0.3 per cent, ANZ 0.2 per cent and the Reserve Bank zero.
"In the last six months consumers have come out of their shell after several years of fairly subdued growth," said Westpac economist Felix Delbruck.
"While it's a little surprising that this should have occurred so late in the piece, the stars are clearly currently aligned for stronger retail activity - petrol is cheap, mortgage rates are low, house prices are rising, and both migrants and tourists are arriving in high numbers."