The private sector created 118,000 jobs in November, primarily thanks to service-related jobs, a number that missed expectations ahead of Friday's closely watched government report.
Economists had expected the report to show 125,000 total private jobs created as the effects linger from Superstorm Sandy and anxiety over the "fiscal cliff" negotiations in Washington.
ADP said the service sector created 114,000 new positions, while goods-producing businesses accounted for the balance of 4,000 jobs. Gains of 23,000 construction jobs offset a loss of 16,000 in manufacturing.
The report is often used as a precursor to the monthly nonfarms payroll report, which the government will release Friday. The economy is expected to have created 93,000 new jobs in November, with the unemployment rate likely to hold steady at 7.9 percent.
While the report can change economists' views, the ADP and government numbers often show wide differences.
As a result, ADP partnered last month with Moody's Analytics in an effort to provide a more accurate number.