Amazon vs. DTC vs. Retail: A Channel Economics Framework

Gross margin is net revenue minus COGS (product plus inbound freight). Contribution margin is gross margin minus channel-variable costs: outbound freight and fulfillment, ad spend, promotional deductions, chargebacks, returns and damages. Contribution margin is the number that determines whether a channel is actually profitable to scale. A brand can have 80% gross margin on Amazon and land at 10-15% contribution after PPC, referral fees, and FBA costs. A brand with 47% gross margin on wholesale can land at 25% contribution when freight and deductions are managed. Investors and lenders increasingly look at contribution margin by channel, not blended gross.

Referral fee 15% for most categories (8% for grocery under $15), FBA fulfillment fee $3.20-8.00 per unit based on size and weight tier, monthly storage $0.87-2.40 per cubic foot (2-3x in Q4), aged inventory surcharge $0.50-3.00 per unit at 181 days, removal/disposal $1.00-2.00 per unit, PPC ad spend 10-25% of sales for scaling brands (ACOS 30-40%, TACOS 15-25% for growth mode), and promotional program fees for Deals and Coupons. Total fee stack typically consumes 35-55% of gross revenue for scaling FBA brands. Model contribution margin, not gross margin, when evaluating whether the channel is worth scaling.

DTC typically produces higher contribution margin per unit when CAC is under control — often 40-55% contribution after acquisition, fulfillment, and returns. Amazon FBA typically produces 20-35% contribution after full fee stack and PPC. On absolute contribution dollars, the answer depends on volume: DTC is often more profitable per unit; Amazon often produces higher total volume at lower per-unit contribution. The best strategy for most CPG brands is not "choose one" but build a mix where each channel plays a strategic role — DTC for brand and margin, Amazon for velocity and discovery, wholesale for volume and shelf presence.

TACOS (Total Advertising Cost of Sales) is Amazon ad spend divided by total Amazon sales, including organic sales driven by ad activity. It differs from ACOS (Advertising Cost of Sales), which only counts sales attributed to the ad. TACOS matters because it reflects the true cost of your Amazon presence — including the organic sales your ad activity supports. TACOS of 15-25% is common for scaling brands; TACOS above 30% signals ad dependency that will collapse if ad spend pauses; TACOS under 10% signals either strong organic momentum or under-investment in growth.

Vendor Central (Amazon 1P) sells product to Amazon at a wholesale price. Amazon owns pricing, promotion, listing, and consumer sales. Economics resemble distributor channels: lower per-unit margin (15-30%), Amazon controls pricing (can be a MAP-policy issue), and deductions (coop, MDF, chargebacks, post-audit) run 8-15% of gross. Seller Central (Amazon 3P FBA) keeps you as the seller of record with full control of pricing, listing content, and promotion — at the fee stack above. Most emerging CPG brands operate 3P FBA; some invitation-only or category-specific relationships operate 1P. Some brands run hybrid.

DTC requires e-commerce durable packaging designed for parcel shipping, with unboxing quality that supports brand and social sharing. Amazon FBA requires SIOC (Ships In Own Container) certification for eligible items, frustration-free packaging certification for premium items, damage-resistant construction, and prep compliance (poly bags, labels, expiration dates). Wholesale requires retail-ready packaging: case-pack configuration matching retailer specs, pallet configuration meeting retailer routing, GS1-verified barcodes, retailer-specific labeling and case labels, and packaging structural durability for pallet transit. A brand entering all three channels often needs three different packaging SKUs — or an integrated pack that meets all three sets of requirements at higher unit cost.

DTC produces cash at checkout — the shortest cash cycle. Cash-out for ad spend often leads cash-in by 30-60 days depending on payback period. Amazon FBA settles bi-weekly (14 days after sale), with reserves held for returns and disputes. Wholesale operates on Net 30-90 receivables from retailers or distributors, and cash-out for production happens 60-180 days before cash-in — so the total cash cycle can extend to 120-250 days. Channel mix decisions have direct cash implications: shifting toward wholesale stretches the cash cycle and requires more working capital; shifting toward DTC compresses it but exposes to acquisition cost variability.

Mix depends on category, stage, and strategy. A common maturity mix for natural / specialty CPG: 15-25% DTC (highest contribution, brand control), 20-30% Amazon (velocity and discovery), 40-60% wholesale (volume and shelf presence). Beauty and personal care sometimes lean more DTC; grocery and beverage often lean more wholesale. The strategic question is not "what percent" but "what role does each channel play" — DTC often for margin and customer relationship, Amazon for scale and search visibility, wholesale for shelf presence and volume. Brands that build a mix where each channel plays a defined role tend to outperform brands that let mix happen by default.