DTC Unit Economics

The make-or-break for DTC brands. AOV, CAC, LTV, payback, contribution margin, cohorts, cash cycle.

DTC unit economics matters

DTC brands live and die on unit economics. The pandemic-era DTC boom collapsed brands that scaled without economics. The winners had relentless discipline: every customer acquisition justified by lifetime contribution, every order generating cash that fueled the next.

AOV and order economics

CAC: blended and channel-level

• Blended CAC: Total marketing spend / new customers (including organic).
• Paid CAC: Paid spend / paid-attributed new customers.
• Marketing-loaded CAC: Include team, tools, content.
• Channel-level CAC: Per channel; informs allocation.
• New customer focus: Don't blend existing customer programs into acquisition CAC.

LTV: cohort-based

• Don't use average lifespan × ARPU. Cohort-based LTV is what matters.
• Sum future revenue per cohort. Discounted by retention curve.
• Cohort by acquisition source. Channel quality varies.
• Predicted LTV. ML models from early behavior predict eventual LTV.
• Gross profit LTV, not revenue LTV. COGS, shipping, returns deducted.

Payback period

• Time to recover CAC from gross profit.
• DTC sweet spot: 3–6 months.
• Subscription DTC: Can extend to 12 months with confidence in retention.
• Long payback = capital intensive; only sustainable with strong retention and reserves.

Contribution margin

• Revenue − (COGS + shipping + processing + returns + variable marketing).
• Healthy DTC: 30–50% contribution margin.
• Below 20%: structural problem with product, pricing, or operations.
• Contribution margin per order; per cohort; per channel.

Cohort analysis

• Retention curve per acquisition cohort.
• Revenue accumulation curves.
• Source-based cohorts (paid social vs organic vs referral).
• Behavioral cohorts (first product, discount used, repeat rate).
• Quarterly cohort review informs allocation.

Cash conversion cycle

• Days from cash out (inventory + media) to cash in (customer payment).
• Inventory days + AR days − AP days.
• DTC ecommerce typically positive cash cycle (customer pays before AP due).
• Subscription DTC: faster cash because recurring payments.
• Cash discipline matters because reaching profitability often requires bridging.

Advanced playbook

• Channel-level full P&L. Each channel modeled with full unit economics.
• LTV by source-cohort dashboards. Track quality of acquisition by channel.
• Predictive LTV from first 7-30 days. Allows confident bidding.
• Subscription option for replenishment. Lifts LTV and retention.
• AOV optimization. Free shipping thresholds, bundles, upsells.
• Returns reduction. Better photography, fit guides, reviews.
• Contribution-margin-aware media bidding. Bid against contribution, not revenue.
• Discount discipline. Tracks LTV of discount-acquired vs full-price.
• Cash flow modeling. Forecasts cash position; informs working capital.
• Annual unit economics review with board. Strategic alignment on growth vs profitability.

Common mistakes

• Revenue-LTV not gross-profit-LTV.
• Average-lifespan LTV instead of cohort-based.
• Blended CAC reported without channel breakdown.
• Working media CAC only; team and tools omitted.
• Discount-acquired customers' LTV not tracked.
• Returns rate omitted from contribution margin.
• Shipping subsidies not reflected in contribution.
• Cash conversion cycle ignored.
• Payback period too long without capital strategy.
• Subscription not offered for consumables.
• Channel allocation by ROAS instead of contribution margin.
• Growth-at-any-cost without unit economics gate.

Operating checklist

• Gross-profit LTV (not revenue LTV)
• Cohort-based LTV per acquisition source
• Channel-level CAC including team/tools
• Contribution margin per order
• Payback period tracked monthly
• Cash conversion cycle tracked
• Predictive LTV model for bidding
• Subscription offered for consumables
• Returns rate tracked per product/category
• Discount-acquired LTV tracked separately
• Quarterly cohort review
• Channel-level full P&L modeling

Part of the DTC Growth series.