A commonly cited benchmark is a 5:1 revenue-to-cost ratio, meaning $5 in revenue for every $1 spent. However, this varies widely by industry and channel, with some digital campaigns achieving 10:1 or higher while brand-awareness campaigns may show lower direct returns.

Use tracking tools like UTM parameters, promo codes, or dedicated landing pages to tie revenue back to specific campaigns. Multi-touch attribution models can also help distribute credit across multiple marketing touchpoints in the customer journey.

Yes, for an accurate ROI you should include all associated costs: ad spend, creative production, software subscriptions, and the portion of staff salaries dedicated to the campaign. Omitting labor costs can significantly overstate your true return.