To address students’ challenges in business writing and bridge the gap between workplace demands and the skills of new professionals, this quasi-experimental study examined the effects of flipped-ARCS and face-to-face ARCS instruction on Pakistani undergraduate English as a Second Language (ESL) students’ business writing achievement and motivation in a business communication course. The findings indicated that the flipped-ARCS model was more effective in improving business writing, while face-to-face ARCS instruction better boosted students’ motivation, supporting the potential of innovative teaching strategies and providing valuable insights for educators and policymakers on integrating technology-based instructional methods into business writing education.