The seasonally-adjusted Absa Purchasing Managers' Index (PMI) fell to 54.1 points in December from 57.2 points in November, remaining above the 50-point mark that separates expansion from contraction.

Absa said in a statement accompanying the survey's findings that a drop in exports impacted sales orders in December.

"While it is not clear what drove the notable export easing, slower services sector activity in the Eurozone amid a surge in COVID-19 infections and an associated tightening in lockdown restriction in several countries at the end of 2021 may have contributed," Absa said.

The employment index dropped to 42.4 in December from 50.6 in November.

"Although we would caution not to read too much into a single month's print, the employment dynamics need to be watched," Absa said. "The weakness in the employment indicator could be seen against the backdrop of reduced optimism about future business conditions."

The South African economy has long suffered from high levels of joblessness, contributing to poverty and inequality that persist nearly three decades after the end of white minority rule.

The unemployment rate hit a new record high of 34.9% in the third quarter of 2021.

(Reporting by Olivia Kumwenda-Mtambo; Editing by Promit Mukherjee)