FP&A

DTC Unit Economics for Non-VC Brands: CAC, LTV, ROAS, Margin

Direct-to-consumer unit economics framework adapted for bootstrapped and growth-stage DTC brands — without the VC-pitch framing.

By Harry Prabandham3 min · 5 slidesUpdated June 15, 2026

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Revenue per order (AOV — average order value)
Cost of goods sold (COGS): product cost + inbound freight + fulfillment + payment processing.
Customer acquisition cost (CAC): marketing spend / new customers acquired.
Customer lifetime value (LTV): expected revenue from a customer across their lifetime, discounted to present value.
The fundamental tension: spend on CAC vs. expected LTV-to-CAC ratio.

Calculate CAC by acquisition channel — Meta, Google, organic, influencer, email, retail. Each has different costs and customer profiles.
Blended CAC = total marketing spend / total new customers.
Channel-level CAC reveals which channels are profitable to scale and which are cash drains.
Watch for attribution problems: customers often touch multiple channels before converting. Single-touch attribution can mislead.

Simple LTV: AOV × Purchases per Year × Years Retained.
Better LTV: cohort analysis — track each cohort of customers across years, measure actual retention and revenue per cohort.
Best LTV: include returns, refunds, chargebacks, and shipping subsidy. Net LTV after all customer-cost is what actually matters.
Most DTC brands overestimate LTV. Be conservative — your spend decisions hinge on it.

ROAS (return on ad spend): revenue / ad spend. Often used in Meta/Google reporting.
ROAS = 4x sounds great until you remember COGS is 40% — net contribution after COGS is much smaller.
Better metric: CAC payback period — months until cumulative gross profit from a customer exceeds the CAC.
Healthy CAC payback: under 12 months for cash-funded growth; under 6 months for aggressive scale.

AOV − (Product COGS + Fulfillment + Payment Processing + Returns Reserve) = contribution margin per order.
This is the actual dollar amount each order contributes to fixed costs and marketing.
Contribution margin / AOV = gross margin %. For sustainable DTC: aim for 40%+.
Sub-40% gross margin businesses face brutal scaling math — every CAC dollar hurts more.
Need help building unit economics dashboards for your DTC brand? Rubric Financial includes DTC FP&A dashboards in CFO and fractional CFO engagements.

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