Marketing measurement
Marketing ROI compares the profit attributable to a campaign with its full cost. Use consistent attribution and include staff, creative, platform and fulfilment costs before comparing channels.
ROI formula(Return minus cost) divided by cost, multiplied by 100.
Track consistentlyUse UTMs and conversion events for every channel.
Compare like with likeUse the same period and attribution rules.
Core calculation
ROI % = ((attributable return - marketing cost) / marketing cost) × 100
If a campaign costs £1,000 and produces £1,600 of attributable gross profit, ROI is 60%. If only revenue is available, label the result clearly because it ignores product and fulfilment costs.
Measure the full cost
Reliable attribution
Customers can encounter several channels before buying. Record your assumptions so comparisons remain meaningful.
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