Marketing KPIs for eCommerce

Revenue Metrics (Board Level)

1. Revenue Growth Rate The percentage change in total revenue compared to the prior period (month-over-month or year-over-year). This is the first number your board will look at. Break it down by new customer revenue vs. returning customer revenue. If growth is primarily from new customer acquisition, you’re on a treadmill. If returning customers contribute 30%+ of revenue growth, you’re building durable value. 2. Average Order Value (AOV) Total revenue divided by the number of orders. The cross-industry average sits at $109 (Store Growers, 2026), but this varies dramatically by vertical. Luxury and jewelry averages can exceed $300, while food and beverage brands may see $40-60. AOV is one of the easiest levers marketing can pull through bundling, threshold-based free shipping, and upsell recommendations. 3. Gross Merchandise Volume (GMV) The total value of merchandise sold through your platform before deductions. GMV matters for marketplace models and investor conversations, but it overstates actual revenue. Always pair GMV with net revenue and gross margin to give leadership an honest picture. 4. Gross Profit Margin Revenue minus cost of goods sold, divided by revenue. A healthy eCommerce gross margin ranges from 40-60% for D2C brands and 20-35% for resellers. Marketing can protect margin by shifting spend toward channels with lower CAC and reducing reliance on discount-driven acquisition.

Customer Economics (Unit Economics)

5. Customer Acquisition Cost (CAC) Total marketing and sales spend divided by new customers acquired. The median eCommerce CAC is $156, though the average is skewed higher to $242 because premium verticals like consumer electronics reach $750 per customer (KPI Depot, 2026). Always report CAC by channel. Your Facebook CAC might be $40 while Google Shopping sits at $85. Those differences drive budget allocation decisions. 6. Customer Lifetime Value (LTV) The total revenue a customer generates over their entire relationship with your brand. Calculate as: Average Order Value x Purchase Frequency x Average Customer Lifespan x Gross Margin. For subscription-based eCommerce, use monthly revenue per customer divided by monthly churn rate. The LTV:CAC ratio should exceed 3:1 for sustainable growth. 7. LTV:CAC Ratio Customer Lifetime Value divided by Customer Acquisition Cost. Below 2:1 means you’re spending more to acquire customers than they’re worth. At 3:1, your acquisition is sustainable. Above 5:1 in eCommerce typically means you’re under-investing in growth and leaving market share on the table. Report this by acquisition channel so your board can see where each dollar works hardest.

Channel Efficiency Metrics

8. Conversion Rate The percentage of website visitors who complete a purchase. The global eCommerce average sits between 2.5% and 3.0% (Nector, 2026). Food and beverage leads at 6.2%, beauty and personal care at 4.9%, while luxury converts at just 0.9%. Desktop converts at 3.9% vs. mobile at 1.8%. If your mobile conversion rate trails desktop by more than 50%, you likely have a mobile UX problem, not a traffic problem. 9. Return on Ad Spend (ROAS) Revenue generated divided by advertising spend. A 4:1 ROAS is considered strong for most eCommerce verticals. Email marketing regularly delivers 6-10x ROAS, making it the most efficient channel for most brands (WebFX, 2026). Report blended ROAS alongside channel-specific ROAS. A blended ROAS that’s declining while channel ROAS stays flat usually means you’re shifting spend toward less efficient channels. 10. Cost Per Acquisition by Channel The cost of acquiring a customer broken down by marketing channel. B2C cost per lead averages $116 across eCommerce (WebFX, 2026). But cost per lead and cost per acquisition are different numbers. A channel with a $20 CPL and 5% lead-to-sale rate has a $400 CPA. A channel with a $50 CPL and 25% close rate has a $200 CPA. Always track CPA, not just CPL. 11. Cart Abandonment Rate The percentage of shoppers who add items to their cart but don’t complete the purchase. Industry average: 69-70% (Baymard Institute, 2025). That means for every 100 shoppers who add to cart, only 30 buy. Reducing abandonment by just 5 percentage points can increase revenue by 15-20% without any additional traffic spend. This is one of the highest-ROI optimization opportunities in eCommerce.

Retention and Loyalty Metrics

12. Repeat Purchase Rate The percentage of customers who make more than one purchase. For most D2C brands, a healthy repeat rate is 25-35%. Subscription models see 60%+. This metric determines whether your growth compounds or whether you’re constantly backfilling churned customers with expensive new acquisition. If your repeat rate is below 20%, your product or post-purchase experience needs work before you increase acquisition spend. 13. Return Rate The percentage of orders that are returned. eCommerce return rates average 20-30% for apparel, 5-10% for electronics, and 3-5% for consumables. Returns eat into revenue, increase logistics costs, and distort revenue reporting. Track net revenue (after returns) alongside gross revenue. A campaign that generates $100K in sales but 35% returns delivered $65K in actual revenue. 14. Customer Retention Rate The percentage of customers who return within a defined period (typically 12 months). Calculate as: ((Customers at end of period – New customers) / Customers at start of period) x 100. A 5% increase in retention can increase profits by 25-95% (Bain & Company). Marketing drives retention through post-purchase email sequences, loyalty programs, and personalized re-engagement campaigns. 15. Email Revenue Contribution The percentage of total revenue attributed to email marketing. For well-run eCommerce brands, email should contribute 25-40% of total revenue. This includes automated flows (welcome, abandoned cart, post-purchase, win-back) and campaign sends. If email contributes less than 20% of revenue, you’re leaving the most profitable channel underutilized. Email requires no media spend, you own the list, and the 6-10x ROAS benchmark makes it the efficiency anchor of your marketing mix.

Your board cares about three things: Is revenue growing? Is customer acquisition efficient? Are customers coming back? Frame your entire marketing presentation around these three questions. Don’t walk in with 40 slides of channel-level data.

The 4-slide board deck for eCommerce marketing

Slide 1: Revenue Performance Revenue growth rate (MoM and YoY), GMV, net revenue after returns, and AOV trend. Show these as a time series, not a single snapshot. A board wants to see trajectory, not a moment in time. Include the plan number alongside the actual so they can see variance. Slide 2: Customer Economics CAC by top 3 channels, LTV, LTV:CAC ratio, and repeat purchase rate. This slide answers the question: are we acquiring customers profitably, and are they sticking around? If your LTV:CAC is declining, explain what’s driving the change and what you’re doing about it. Slide 3: Channel Efficiency Blended ROAS, channel-specific ROAS for your top 3 spend channels, and email revenue contribution. Show how marketing spend translates to revenue. If you spent $500K last quarter and generated $2.5M in attributed revenue, that’s a 5:1 blended ROAS. Lead with the ratio, then break it down by channel. Slide 4: Forward Indicators Cart abandonment trend, new customer acquisition rate, email list growth, and conversion rate by device. These are predictive metrics. If new customer acquisition is slowing while repeat purchase holds steady, total revenue will plateau in 2-3 months. Show the board you’re watching the road ahead, not just the rearview mirror.

“The eCommerce CMOs who earn more budget are the ones who walk into the board meeting and say: ‘We acquired 12,000 new customers at $128 each last quarter. Their projected LTV is $410. That’s a 3.2:1 payback. Here’s where we want to invest next quarter to maintain that ratio while increasing volume by 20%.’ That’s a capital allocation conversation, not a marketing update.”

Hardik Shah, Founder of ScaleGrowth.Digital