Use the Same Period and Source Data
Comparisons are unreliable when one result uses final records and the other uses entries from before corrections. A change in allowances or overtime can also explain a difference without an application error. Agree the basis for comparison first.
We help select the sample period, employee groups, and source records. Previous results provide a comparison, while confirmed company rules determine what is correct. Record any planned policy changes so the expected differences are not mistaken for migration issues.