- DTC gross margin should sit at 55%–65% for a healthy consumer brand — below 50% and the contribution economics rarely work once you add CAC and fulfilment.
- CAC payback under 6 months on a contribution basis is the benchmark. Beyond 12 months you are funding growth with cash you may not have.
- CM3 (contribution margin after CAC) should be 15%–25% of revenue. This is the number that actually tells you whether the business is working.
- LTV:CAC of 3:1 in margin dollars is the floor — not revenue LTV divided by CAC, which flatters the number.
- Inventory days of 45–75 and MER of 15%–20% round out the six metrics that tell the whole health story of a DTC brand.
Most eCommerce founders track revenue and gross margin. That is a good start and a terrible finish. Revenue tells you how big your top line is. Gross margin tells you how much you keep before the variable costs that actually decide whether your brand is working. This post covers the six metrics that complete the picture — the ones a specialist CFO looks at first when they open a new client's P&L.
1. Gross margin: 55%–65% for healthy DTC
Gross margin for a DTC consumer brand should sit in the 55%–65% range. Beauty and skincare brands can reach 65%–72% because COGS is relatively low for formulated products. Apparel and hardgoods typically sit lower, at 50%–60%. If you are below 50%, the contribution economics get very tight once you add fulfilment, returns, payment fees and CAC — there simply is not enough margin left to cover the variable cost stack and still make money on each customer.
Note: gross margin for a wholesale or retail-channel CPG brand looks very different — COGS commonly runs 58%–67% of revenue once you account for distributor and retailer economics. Do not benchmark a multichannel CPG business against a pure-play DTC gross margin.
2. CAC payback period: under 6 months
CAC payback — the number of months it takes to recover your customer acquisition cost in contribution dollars — is the single most important cash-flow metric in a DTC business. The benchmark is under 6 months on a contribution basis. At 6 months, you have a tight but workable model. At 12 months, you are funding growth with working capital that is permanently tied up in the acquisition cycle. Beyond 12 months, most brands discover they are not actually profitable at scale — they are just growing a working-capital hole.
CAC payback is calculated as: CAC divided by (AOV multiplied by gross margin minus variable fulfilment costs), divided by the expected purchase frequency. The mistake most founders make is calculating payback on revenue LTV rather than contribution LTV, which produces a flattering number that overstates the speed of recovery.
3. CM3 (contribution margin after CAC): 15%–25%
The contribution-margin waterfall runs from CM1 (gross margin, typically 55%–65%) to CM2 (after payment fees, fulfilment, shipping and returns — typically 45%–55%) to CM3 (after CAC — the healthy benchmark is 15%–25% of revenue).
CM3 is the number that tells you whether the business is actually working. A brand running 62% gross margin and 25% CAC spend as a percentage of revenue gets to roughly 20% CM3 — healthy. The same brand with 38% CAC spend as a percentage of revenue gets to 7% CM3, which does not cover overhead, let alone profit. When founders wonder why their beautiful gross margin is not showing up in the bank account, the CM3 analysis almost always finds the leak.
4. LTV:CAC ratio: 3:1 in margin dollars
The LTV:CAC ratio benchmark is 3:1 — but measured in margin dollars, not revenue. The most common mistake is dividing revenue LTV by CAC. A brand with a $180 revenue LTV and $60 CAC looks like a 3:1 ratio, but if the margin on that $180 is only 55%, the margin LTV is $99, and the real ratio is 1.65:1 — below breakeven on the acquisition. Always calculate LTV in contribution dollars, not gross revenue.
5. Inventory days: 45–75 days
Inventory days (cost of goods on hand divided by daily COGS) should sit in the 45–75 day range for most DTC consumer brands. Below 45 days and you risk stockouts and lost revenue. Above 90 days and you are tying up working capital that the business needs to fund the next production run, the next marketing push, or the next retail launch. Many of the cash crunches that force emergency bridge rounds or constrain growth in DTC brands are inventory problems in disguise — not enough sales, or too much cash locked in product that is not moving.
6. MER (Marketing Efficiency Ratio): 15%–20% of revenue
MER — total marketing spend divided by total revenue — is the blended efficiency metric that accounts for all your acquisition spend across channels, including the halo effect that platform-specific ROAS cannot capture. The healthy planning band for a growing DTC brand is 15%–20% of revenue. Above 25%–30% and you are acquiring customers at a rate that is hard to sustain from cash flow. Below 10%–12% and you may be underleveraging, though some mature brands with strong organic and repeat rates can sustain lower MER.
Using benchmarks to find your leverage point
These six metrics interact. A brand with a 62% gross margin and a 7-month CAC payback has a gross-margin problem if the payback is long because margin is thin, or a CAC problem if the margin is fine but the acquisition cost is too high. The benchmark framework tells you which lever to pull — price, COGS, channel mix, or acquisition efficiency.
See the full finance benchmarks library on The CFO Index, or browse the eCommerce CFO ranking to find a firm that specialises in DTC unit economics and can run this analysis against your actual numbers.
Comparing firms? Start with the fractional CFO ranking and interim CFO ranking, then narrow by your industry.