DTC Brand Blended ROAS & Contribution Margin Calculator
Simulate omni-channel paid media spend across Meta, Google, and TikTok to calculate true net contribution margins.
Parameters & Config
Total paid media budget allocated across advertising channels
Total gross revenue attributed to the advertising campaign
Cost percentage to manufacture, source, or fulfill the purchased products
Average checkout dollar value per transaction
Gross revenue generated per dollar spent on advertising
Net take-home cash after ad spend and product cost deductions
Key Metrics & Sub-Totals
3 itemsCalculation Summary & Unit Breakdown
| Metric | Calculated Value | Notes / Logic |
|---|---|---|
| Total Advertising Spend | $25000.00 | Paid media budget |
| Gross Revenue Generated | $75000.00 | Ad-driven GMV |
| Product Cost (COGS) | 32% | $24000.00 total cost |
| Return on Ad Spend (ROAS) | 300% | 3.00x spend |
| Break-Even ROAS Threshold | 147.1% | Minimum to avoid loss |
| Net Profit from Advertising | $26000.00 | After ads & product cost |
| Effective Cost Per Acquisition (CPA) | $28.33 | Based on $85 AOV |
| Net Profit Margin on Ad Revenue | 34.7% | Take-home return |
Overview & Methodology
Direct-to-Consumer (DTC) brands running multi-channel campaigns rely on Blended ROAS and Contribution Margin (revenue minus COGS, shipping, payment processing, and ad spend) to evaluate portfolio health.
Mathematical Formulation
Blended ROAS = (Total Store Revenue / Total Marketing Spend) × 100. Contribution Margin % = (Net Profit / Revenue) × 100.Optimization Best Practices
Track Contribution Margin per order to verify that paid acquisition generates positive variable cash before fixed overhead.
Leverage post-purchase customer surveys ("How did you hear about us?") to validate multi-touch attribution models.
Build email and SMS retention flows to drive repeat purchase rate (LTV) from paid customer cohorts.
Frequently Asked Questions
Q.What is the difference between platform ROAS and Blended ROAS (MER)?
Platform ROAS measures conversions attributed by Facebook or Google pixels; Blended ROAS (MER) divides total company Shopify revenue by total advertising dollars spent.
Q.How much net contribution profit is made on $75k sales with $25k spend at 32% COGS?
$75k revenue minus $24k COGS (32%) minus $25k ad spend equals $26,000 in net profit (34.7% margin).
Q.What is a healthy Marketing Efficiency Ratio for DTC?
An MER of 3.0x or higher (ad spend ≤ 33% of gross sales) is the target for sustainable DTC profitability.