ANZ statistics for newspapers and internet sites show decline of 2.9 per cent for September.
Declines in job advertisements suggest the unemployment rate could creep higher, ANZ says.
ANZ's total job ads series, which counts vacancies advertised in seven daily newspapers and the internet sites Seek and Trade Me, fell 2.9 per cent last month, seasonally adjusted, to its lowest level since April.
Auckland recorded a 3.6 per cent fall in total job ads, on top of a 2 per cent fall in August, but Canterbury rose 1.9 per cent.
ANZ's composite series, which weights newspaper and internet ads so as to give a better indicator of unemployment ahead, fell 4 per cent. "This continues to suggest the unemployment rate will rise towards 7 per cent [from 6.8 per cent now] over the next six months," ANZ economist Sharon Zollner said.