This stud.v is pmlllfll!'d /Jy tt desire to .find out the impact qf' internal control
system on external audit fee determination, based on the experience in Nigeria.
The design and technique employed in data collection are cross - sectional
\'1/rvey research design and data collecthm .fimn secondary source. Tile
Ordinary Least Square (OLS) was used to estimate tile independent variables
(INAUDITC, INTAUOBJ, INTNATU) and analyse data collected. It was found
that illfernal control system (in terms of quality/competence, objectivity and
nature r~f' work carried olll ll'itl!in tile system) is i111·ersely related to external
auditors' fee. Following .fi'Oin this finding, it is recommended that, the internal
control system r~f' c01porate bodies should constantly be monitored by their
managements for e.flective auditing. Also, external auditors should appropriately
rely on their cliellf's internal control system when making decisions on the extent
of reliance on the internal colllrol system and ll'hen determining their audit fee
