ROI depends on your baseline and goals, but there are patterns. Offices often see improvements in utilization, time‑to‑onboard, and retention when daylight, acoustics, and choice of work settings are addressed. Retail and hospitality environments tend to lift average ticket and dwell time with better adjacencies, lighting, and material cues that match the brand promise. Across sectors, higher‑durability finishes and service‑friendly layouts cut maintenance and downtime.
If you want a rule of thumb, map the commercial interior design benefits you’re after (productivity, dwell, conversion, retention, upkeep) to the specific spatial moves that drive them (daylight access, seating density, queue design, resilient finishes). Then track before/after with a short list of KPIs: employee retention, revenue per square foot, energy intensity, average length of stay, or Google review ratings. The clearer the link, the clearer the return.