{"uid":"cap_iBUxakXyxMdsAi61g0f9t","slug":"amazon-fba-unit-economics-breakeven-acos-calculator-7f6adc82","name":"Amazon FBA Unit Economics & Breakeven ACOS Calculator","description":"Deterministic Amazon FBA unit economics calculator. Pass ?price_usd=29.99&cogs_usd=6.50&weight_oz=12&referral_pct=15. Returns size tier, referral fee, estimated FBA fulfillment + storage fee, net pre-ad contribution ($ and %), breakeven ACOS %, breakeven ROAS, and target ACOS for a 15% net margin.","url":"https://x402-niche-briefs.fly.dev/v1/fba-fee-margin-calc?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["price_usd","cogs_usd","weight_oz"],"properties":{"cogs_usd":{"type":"string","description":"Landed cost of goods sold per unit in USD"},"price_usd":{"type":"string","description":"Retail sale price in USD"},"weight_oz":{"type":"string","description":"Packaged unit shipping weight in ounces"},"referral_pct":{"type":"string","description":"Amazon category referral fee percentage (default 15)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["as_of","inputs","estimated_size_tier","fee_breakdown_usd","unit_economics","disclaimer"],"properties":{"as_of":{"type":"string"},"inputs":{"type":"object","required":["price_usd","cogs_usd","weight_oz","referral_pct"],"properties":{"cogs_usd":{"type":"number"},"price_usd":{"type":"number"},"weight_oz":{"type":"number"},"referral_pct":{"type":"number"}}},"disclaimer":{"type":"string"},"unit_economics":{"type":"object","required":["net_pre_ad_contribution_usd","net_pre_ad_margin_pct","breakeven_acos_pct","breakeven_roas","target_acos_for_15pct_net_profit","health_verdict"],"properties":{"breakeven_roas":{"type":"number"},"health_verdict":{"type":"string"},"breakeven_acos_pct":{"type":"number"},"net_pre_ad_margin_pct":{"type":"number"},"net_pre_ad_contribution_usd":{"type":"number"},"target_acos_for_15pct_net_profit":{"type":"number"}}},"fee_breakdown_usd":{"type":"object","required":["referral_fee_usd","fba_fulfillment_fee_usd","est_storage_and_inbound_placement_usd","total_amazon_fees_usd"],"properties":{"referral_fee_usd":{"type":"number"},"total_amazon_fees_usd":{"type":"number"},"fba_fulfillment_fee_usd":{"type":"number"},"est_storage_and_inbound_placement_usd":{"type":"number"}}},"estimated_size_tier":{"type":"string"}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_mISxp-gaSkswF7tS6q1zA","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates Amazon FBA fees, net pre-ad contribution margin, breakeven ACOS, breakeven ROAS, and target ACOS for a 15% net margin given a product's price, COGS, and weight.","exampleAgentPrompt":"Can you run the FBA unit economics calc for a product I'm selling at $29.99 with a COGS of $6.50, packaged weight of 12 oz, and a 15% referral fee — I need the breakeven ACOS, breakeven ROAS, and what target ACOS I should set to hit a 15% net margin?","exampleUseCases":[{"title":"New product launch profitability check","prompt":"I'm about to launch a silicone kitchen spatula on Amazon priced at $14.99, my landed COGS is $3.20, it weighs 8 oz packed, and it's in the kitchen category at 15% referral. Can you tell me my estimated FBA fees, breakeven ACOS, and whether the margins are healthy enough to run ads?"},{"title":"PPC budget planning for existing listing","prompt":"I sell a yoga mat on Amazon for $39.95, my COGS is $11.00, it weighs 48 oz, and the referral fee is 15%. What's my breakeven ACOS and target ACOS to maintain a 15% net profit margin so I can set my Amazon PPC bids correctly?"},{"title":"Comparing two price points for a product","prompt":"I'm deciding between pricing my water bottle at $18.99 or $22.99 on Amazon — COGS is $5.00, weight is 10 oz, 15% referral fee. Run the FBA unit economics for $18.99 so I can see the breakeven ROAS and net margin at that price point."}],"resultDescription":"Returns a JSON object with: the detected FBA size tier, an itemized fee breakdown (referral fee, FBA fulfillment fee, estimated storage and inbound placement fee, total Amazon fees in USD), unit economics summary (net pre-ad contribution in USD and %, breakeven ACOS %, breakeven ROAS, target ACOS for 15% net profit, and a health verdict), plus the echoed inputs and a disclaimer about fee estimate accuracy.","failureModes":["Missing required parameters (price_usd, cogs_usd, weight_oz) returns a 400 error","Non-numeric or negative values for price/COGS/weight may cause validation errors","Extremely high weights may fall outside standard FBA size tier tables, reducing accuracy","Fee estimates may lag behind Amazon's published rates if not recently updated","COGS higher than price produces negative margins with a poor health verdict"],"whenToPreferThis":"Use this endpoint when you need a quick, deterministic Amazon FBA unit economics snapshot without building your own fee-lookup logic. It is ideal for product research, PPC budget planning, and sourcing decisions where you need breakeven ACOS and ROAS alongside fee estimates in a single call. Prefer this over manual fee calculators when automating product profitability screening at scale or integrating FBA economics into an agent workflow.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-30T19:06:30.446Z","isFirstParty":false,"canonicalSlug":"amazon-fba-unit-economics-breakeven-acos-calculator-7f6adc82"}