Every marketing dollar should be accountable.
ROI Formula
Marketing ROI = (Revenue - Cost) / Cost × 100. Use our [Marketing ROI Calculator](/calculators/marketing-roi-calculator), [LinkedIn Calculator](/calculators/linkedin-marketing-calculator), and [Meta Calculator](/calculators/meta-marketing-calculator).
Key Metrics
CAC (Customer Acquisition Cost): Spend / Customers. LTV should be 3x+ CAC. CPL varies: SaaS B2B ₹2-10K, E-commerce ₹50-500. ROAS 4x+ is good for e-commerce.
Channel Benchmarks
Google Search: 3-5% CTR, 3-5% conversion. Meta: 0.5-1.5% CTR, 1-3% conversion. LinkedIn: 0.3-0.8% CTR, best for B2B.
Attribution
Last click is misleading. Use data-driven attribution in GA4 for accurate credit assignment across touchpoints.
Optimization
1. Cut bottom 20% performers monthly. 2. Scale winners (watch diminishing returns). 3. A/B test everything. 4. Optimize landing pages (10% conversion improvement = 10% lower ad costs). 5. Allocate 15-20% to retargeting.