Know Your True Ecommerce Unit Economics
Calculate your first-order contribution margin, customer acquisition cost payback, and profitability score in 60 seconds.
💰 Revenue & Pricing
💸 Cost Structure
📊 Acquisition Metrics
🔄 Retention (Optional)
Ecommerce Margin & CAC Calculator
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Your First-Order Unit Economics
Based on your inputs, here's a comprehensive view of whether your first customer is profitable in the short term and whether your unit economics support scaling with paid acquisition.
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Detailed Calculation Breakdown
Learn the Fundamentals
Contribution margin is the revenue left after subtracting all variable costs associated with fulfilling an order. It represents what's available to cover customer acquisition costs and contribute to profit.
Formula: (AOV × Gross Margin%) - Payment Processing - Fulfillment - Other Costs
For a $100 order with 60% gross margin ($60), if you spend $3 on payment processing and $8 on fulfillment, your contribution margin is $49 per order. This is the ceiling for how much you can afford to spend acquiring that customer while still being profitable on the first order.
Why it matters: Many DTC brands focus on ROAS (return on ad spend) alone, but that ignores the cost of fulfillment and processing. You could have a 4:1 ROAS and still lose money after accounting for all your variable costs. Contribution margin reveals your true unit economics.
CAC Formula: (Cost Per Click) ÷ (Click to Order Rate)
This calculator focuses on paid acquisition (ads) because it's the most measurable source. Here's how it works:
- You pay $1.50 per click on your ads
- Of every 100 clicks, 2 convert to orders (2% click-to-order rate)
- Therefore your CAC from ads is $1.50 ÷ 0.02 = $75 per customer
If you have other sources of customers (organic search, email, word-of-mouth), this calculator assumes a blended CAC that you provide. Many brands find their organic CAC is $0 or very low, which is why blending with paid acquisition is important.
The benchmark: Most ecommerce brands target a CAC payback of 30-90 days. If your CAC is $100 and your contribution margin is $50, it takes 2 orders to break even.
The Profitability Score (0-100) measures whether your first-order unit economics support scaling with paid acquisition. It's based on two key factors:
- Contribution Margin vs. CAC: Is your contribution margin greater than your CAC? If not, every paid acquisition loses money on the first order.
- Payback Period: How many days/weeks until the CAC is recovered? A faster payback = healthier cash flow.
Score ranges:
- 70-100 (Excellent): You can confidently scale with paid acquisition. Your contribution margin covers your CAC with room to spare.
- 30-69 (Caution): You're break-even or slightly unprofitable on the first order. You'll depend on repeat purchases to recover CAC. More risky but viable if repeat rate is strong.
- 0-29 (Red Flag): Your first-order CAC exceeds your contribution margin. You're losing money on every paid acquisition unless repeat customers bail you out. Consider reducing ad spend, raising price, or improving conversion rate.
Frequently Asked Questions
Conversion Rate: Total Orders ÷ Total Website Visitors (from Google Analytics or your analytics tool). For example, if you had 10,000 visitors and 250 orders, that's a 2.5% conversion rate.
Click-to-Order Rate (from ads): Orders from ads ÷ Clicks from ads. This data comes from your ad platform (Google Ads, Facebook, TikTok, etc.). It's specific to paid traffic, not all traffic.
If you're unsure, use the benchmark: average ecommerce conversion rate is 2-3%, and click-to-order from ads is often 1-3% depending on your funnel quality.
Use estimates and benchmarks! You don't need perfect data to start. Here are rough industry benchmarks:
- Average AOV (DTC): $50-$100
- Conversion Rate: 2-3%
- Gross Margin: 55-70%
- Payment Processing: 2.5-3.5%
- Fulfillment & Shipping: $5-$15 per order
- CPC (paid ads): $0.50-$3.00
As you gather real data, come back and update the calculator. This is a living tool to track improvement.
Absolutely! LTV is crucial for long-term viability. This calculator focuses on first-order unit economics because:
- It reveals whether you can acquire customers sustainably.
- It's a leading indicator of growth—if your first order is underwater, you'll burn cash as you scale.
However, if your repeat purchase rate is strong (say, 20%+ in the first 30 days), you can afford a higher CAC even if the first order is unprofitable. That's why we include optional repeat purchase fields.
Healthy LTV:CAC ratio: 3:1 or better. If your LTV is $300 and CAC is $75, you have a 4:1 ratio, which is excellent.
This calculator computes CAC from paid ads (CPC ÷ Click-to-Order rate) and lets you input an optional "Other CAC Sources" figure for organic, email, social organic, etc.
For simplicity, we then use a blended approach: if you have no other CAC sources, we use the paid ad CAC. If you input an other CAC, we average them.
Advanced approach: For a more precise blended CAC, calculate it outside this tool: (Total Ad Spend + Other Acquisition Spend) ÷ Total First-Time Customers. Then input that figure in "Other CAC Sources" and leave CPC/Click-to-Order at $0.
Yes! Here are rough benchmarks for DTC ecommerce brands (averages, actual ranges vary by category):
- Average CAC: $25-$75 depending on category and ad platform
- Average AOV: $50-$120
- Conversion Rate: 2-4%
- Gross Margin: 55-65%
- Healthy LTV:CAC Ratio: 3:1
- Repeat Purchase Rate (30 days): 10-25%
- First-order profitable: Only ~35% of DTC brands achieve profitability on the first order with paid acquisition
Use these as guidance, but understand your category matters. Luxury goods have higher margins but lower conversion; consumables have lower margins but higher repeat.
Great! That's exactly why we offer custom reviews. Enter your contact info in the form above ("Get Your Custom Report") and we'll send you:
- A detailed breakdown of your numbers
- Comparison to 500+ similar ecommerce brands
- Custom recommendations to improve profitability
- A follow-up call to discuss strategy
You can also book a free 30-minute strategy call directly. No sales pitch, just honest guidance on your unit economics and growth plan.