Install
openclaw skills install marketplace-fee-calculatorCalculate and compare total selling fees across major e-commerce marketplaces (Amazon, eBay, Etsy, Walmart, Shopify) including referral fees, fulfillment costs, subscription tiers, and hidden charges to optimize channel profitability.
openclaw skills install marketplace-fee-calculatorUnderstand the true cost of selling on every major marketplace before committing inventory and resources. This skill breaks down fee structures, calculates net margins per channel, and helps you decide where to sell—and where to avoid.
| Decision | Strong | Acceptable | Weak |
|---|---|---|---|
| Fee identification | All fee types mapped per marketplace with current rates | Major fees identified, minor ones estimated | Only referral/commission fees considered |
| Net margin calc | Per-SKU net margin after ALL fees, per marketplace | Category-level average margin | Gross margin minus "about 15%" |
| Channel comparison | Side-by-side net profit per unit across 3+ channels | Two channels compared | Single channel evaluated in isolation |
| Hidden cost inclusion | Storage, long-term fees, returns, advertising factored in | Storage and returns included | Only transaction fees counted |
| Break-even volume | Minimum units per marketplace to cover fixed/subscription costs | Subscription cost acknowledged | Fixed costs ignored |
| Fee optimization | Active strategies to reduce fees (FBA vs FBM, category choice, pricing) | Awareness of optimization options | No fee reduction strategies |
Gather the information needed for accurate fee calculations:
| Field | Value | Why It Matters |
|---|---|---|
| Product category | [e.g., Kitchen & Dining] | Determines referral fee % |
| Selling price | [$XX.XX] | Base for percentage-based fees |
| Product weight | [X lbs, X oz] | Affects fulfillment/shipping fees |
| Product dimensions | [L × W × H inches] | Determines size tier |
| COGS per unit | [$XX.XX] | For net margin calculation |
| Monthly volume (est.) | [X units] | For subscription tier analysis |
| Packaging weight | [X oz] | Added to product weight for shipping |
Referral Fees (per sale):
| Category | Rate | Minimum |
|---|---|---|
| Most categories | 15% | $0.30 |
| Clothing & Accessories | 17% | $0.30 |
| Electronics | 8% | |
| Grocery | 8-15% | $0.30 |
| Jewelry | 20% (first $250), 5% (remainder) | $0.30 |
| Personal Computers | 6% | $0.30 |
FBA Fees (if using Fulfillment by Amazon):
| Size Tier | Weight Range | Fee |
|---|---|---|
| Small standard | 0-0.5 lb | $3.22 |
| Small standard | 0.5-1 lb | $3.40 |
| Large standard | 0-0.5 lb | $3.86 |
| Large standard | 0.5-1 lb | $4.08 |
| Large standard | 1-2 lb | $4.76 |
| Large standard | 2-3 lb | $5.33 |
| Large standard | 3+ lb | $5.33 + $0.32/half-lb above 3 lb |
Monthly Storage Fees:
Other Amazon Fees:
Final Value Fees (per sale):
| Category | Rate | Per-order fee |
|---|---|---|
| Most categories | 13.25% | $0.30 |
| Books, Music, Movies | 14.95% | $0.30 |
| Guitars | 6.35% | $0.30 |
| Business & Industrial | 12.35% | $0.30 |
| Collectibles | 12.35% | $0.30 |
eBay Store Subscriptions:
| Plan | Monthly | Annual (per month) | Free Listings |
|---|---|---|---|
| Starter | $7.95 | $4.95 | 250 |
| Basic | $27.95 | $21.95 | 1,000 |
| Premium | $74.95 | $59.95 | 10,000 |
| Anchor | $349.95 | $299.95 | 25,000 |
Promoted Listings: 2-20% of sale price (optional but increasingly necessary)
| Fee Type | Rate | Notes |
|---|---|---|
| Listing fee | $0.20 per listing | Renews every 4 months or upon sale |
| Transaction fee | 6.5% | On total sale price including shipping |
| Payment processing | 3% + $0.25 | Etsy Payments |
| Offsite ads fee | 12-15% | If sale comes from Etsy's ads (mandatory for sellers > $10K/yr) |
| Etsy Plus | $10/month | Optional — custom domain, restock alerts |
| Category | Referral Fee | Notes |
|---|---|---|
| Most categories | 15% | |
| Electronics | 8% | |
| Personal Computers | 6% | |
| Clothing | 15% | |
| Jewelry | 20% (first $250) |
WFS (Walmart Fulfillment Services):
| Weight | Fee |
|---|---|
| 0-1 lb | $3.45 |
| 1-2 lb | $4.95 |
| 2-3 lb | $5.45 |
| 3+ lb | $5.45 + $0.40/lb over 3 |
No monthly subscription fee (significant advantage).
| Plan | Monthly | Transaction Fee | Payment Processing |
|---|---|---|---|
| Basic | $39/mo | 2% (non-Shopify Payments) | 2.9% + $0.30 |
| Shopify | $105/mo | 1% | 2.7% + $0.30 |
| Advanced | $399/mo | 0.6% | 2.5% + $0.30 |
Additional DTC costs to include:
Build a comparison table per SKU:
| Fee Component | Amazon FBA | eBay | Etsy | Walmart WFS | Shopify DTC |
|---|---|---|---|---|---|
| Selling price | $49.99 | $49.99 | $49.99 | $49.99 | $49.99 |
| Referral/transaction fee | $7.50 | $6.92 | $3.25 | $7.50 | $0.00 |
| Fulfillment fee | $4.76 | Self | Self | $4.95 | Self ($5.50) |
| Payment processing | Incl. | Incl. | $1.75 | Incl. | $1.75 |
| Listing fee | $0.00 | $0.00 | $0.20 | $0.00 | $0.00 |
| Monthly sub (amortized) | $0.40 | $0.22 | $0.00 | $0.00 | $1.05 |
| Storage (amortized) | $0.15 | $0.00 | $0.00 | $0.12 | $0.00 |
| Total fees | $12.81 | $7.14 | $5.20 | $12.57 | $8.30 |
| COGS | $15.00 | $15.00 | $15.00 | $15.00 | $15.00 |
| Net profit/unit | $22.18 | $27.85 | $29.79 | $22.42 | $26.69 |
| Net margin | 44.4% | 55.7% | 59.6% | 44.8% | 53.4% |
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