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FBA Profit Calculator

FBA利润计算器

Most sellers know their price and their unit cost and assume the gap is profit. It is not. Amazon takes a referral fee, a fulfillment fee, and storage, dimensional weight can blow up the shipping line on a light-but-bulky product, and there are cost lines sellers forget entirely. This skill builds the full stack and returns the real number, and settles the FBA versus FBM question with cost evidence.
大多数卖家只知道产品售价和单位成本，便认为两者的差额就是利润，但事实并非如此。亚马逊会收取推荐费、配送费和仓储费，体积重量可能会让轻但体积大的产品的运费大幅增加，而且还有很多卖家完全忽略的成本项。本工具会计算完整的成本结构，得出真实的利润数据，并通过成本对比明确FBA与FBM的优劣。

When to use this

适用场景

  • Evaluating whether a product to source can actually be profitable.
  • A product sells well but the bank balance does not grow and nobody knows why.
  • Comparing FBA versus FBM, or comparing two product sizes or price points.
  • Setting a price from a target margin instead of guessing.
  • A product's fees feel high and the seller does not know which line to blame.
  • Comparing two package designs by fulfillment cost.
  • 评估意向采购的产品是否真的有利可图。
  • 产品销量不错但银行账户余额没有增长，且无人知晓原因。
  • 对比FBA与FBM，或对比两种产品尺寸或定价策略。
  • 根据目标利润率制定售价，而非盲目猜测。
  • 产品费用过高，但卖家不知道问题出在哪个成本项。
  • 通过配送成本对比两种包装设计。

The framework. The FBA Fee Stack

计算框架：FBA费用结构

Net profit per unit is price minus seven layers. Walk every layer. the forgotten ones are where margin dies.
Selling price
  minus  Referral fee        (category percent of price, 6 to 20%+ by category, min ~0.30)
  minus  FBA fulfillment fee (by size tier and billable weight, see shipping layer)
  minus  Returns processing  (per-returned-unit in high-return-rate categories, see below)
  minus  Monthly storage     (per-unit share. cubic feet x rate, higher Oct to Dec)
  minus  Unit cost           (landed: factory price + freight + duty per unit)
  minus  Returns reserve     (return rate x cost of a returned unit)
  minus  Variable extras     (prep, inbound shipping to Amazon, aged-inventory risk)
  minus  Promo and ads       (allocate a realistic per-unit ad cost)
  =      Net profit per unit
Net margin equals net profit divided by selling price. Break-even ACoS equals contribution margin before ads, divided by price, as a percent. it is the most ads can cost before the unit loses money.
单位净利润等于售价减去七层成本。逐一梳理每一层成本，那些被忽略的成本项正是利润率流失的关键。
Selling price
  minus  Referral fee        (category percent of price, 6 to 20%+ by category, min ~0.30)
  minus  FBA fulfillment fee (by size tier and billable weight, see shipping layer)
  minus  Returns processing  (per-returned-unit in high-return-rate categories, see below)
  minus  Monthly storage     (per-unit share. cubic feet x rate, higher Oct to Dec)
  minus  Unit cost           (landed: factory price + freight + duty per unit)
  minus  Returns reserve     (return rate x cost of a returned unit)
  minus  Variable extras     (prep, inbound shipping to Amazon, aged-inventory risk)
  minus  Promo and ads       (allocate a realistic per-unit ad cost)
  =      Net profit per unit
净利润率等于净利润除以售价。盈亏平衡ACoS等于广告前贡献毛利除以售价的百分比，即单位产品在不亏损的情况下可承受的最高广告成本占比。

The size tiers that drive the fulfillment fee

影响配送费的尺寸等级

The FBA fulfillment fee is set by size tier and billable weight, not by price.
  • Small standard and large standard cover most products. fee rises in steps with weight.
  • Bulky and oversize tiers cost dramatically more. a product that crosses a tier boundary by one ounce or one inch can lose its entire margin.
  • Always check which tier the dimensions and weight land in, and how close they are to the next tier up.
FBA配送费由尺寸等级和计费重量决定，与售价无关。
  • 小型标准件和大型标准件涵盖了大多数产品，费用随重量递增。
  • 大件和超大件等级的费用大幅更高。产品哪怕超出等级边界一盎司或一英寸，都可能导致利润率完全流失。
  • 务必确认产品的尺寸和重量属于哪个等级，以及距离下一等级边界有多近。

Shipping cost layer

运费成本项

The shipping side of the FBA fee has three components that move it around independent of price. Walk them before quoting a fulfillment number.
FBA费用中的运费部分包含三个独立于售价的影响因素，计算配送费用前需逐一确认。

Dimensional weight

体积重量

Amazon charges on the greater of actual weight and dimensional weight. Dimensional weight equals length times width times height, divided by the dim divisor (currently 139 for most US FBA size tiers, verify in Seller Central before quoting). A light but bulky product is billed on its volume, not its scale weight. this surprises sellers constantly. Always state both numbers and the billable one.
亚马逊会按实际重量和体积重量中的较大值收取费用。体积重量等于长×宽×高除以体积系数（目前美国大多数FBA尺寸等级的系数为139，报价前请在卖家后台确认）。轻但体积大的产品会按体积计费，而非实际称重，这一点常令卖家意外。务必同时标注实际重量、体积重量及最终计费重量。

Oversize tier surcharges

超大件等级附加费

The fulfillment fee step between large standard and the oversize tiers is large, and the oversize tier itself has internal bands (small, medium, large, special). Crossing into oversize by a single dimension can multiply the fee. always confirm which oversize band the longest side, the girth, and the unit weight produce.
大型标准件与超大件等级之间的配送费差距极大，且超大件内部还分为多个子等级（小型、中型、大型、特殊）。哪怕仅一个维度超出标准，都可能使费用翻倍。务必根据最长边、周长及单位重量确认产品所属的超大件子等级。

Peak surcharges and inbound

旺季附加费与入库运费

Q4 carries a peak fulfillment surcharge on top of the standard fulfillment fee, distinct from the elevated Q4 storage rate. Inbound shipping from the supplier or the seller to the Amazon warehouse is part of the unit's real fulfillment cost and is routinely forgotten. add the per-unit share of inbound.
第四季度会在标准配送费基础上收取旺季配送附加费，这与第四季度的高额仓储费是分开的。从供应商或卖家仓库运往亚马逊仓库的入库运费是产品真实配送成本的一部分，常被卖家忽略，需计入单位成本分摊。

Returns Processing Fee

退货处理费

Amazon adds a Returns Processing Fee per returned unit for high-return-rate categories. Apparel and shoes have long been charged on every returned unit, and the fee now reaches many other categories whose return rate runs above the category benchmark. The charge is added per returned unit for high-return-rate categories. check your category's rate in the current fee schedule. On a product with a meaningful return rate this is a real per-sold-unit cost once spread across units sold, not just across units returned. fold it into the returns line rather than ignoring it. Low- volume products (below the monthly unit threshold) may be exempt. verify your status.
针对高退货率品类，亚马逊会对每件退货产品收取退货处理费。服装和鞋类长期以来都按每件退货收取费用，如今该费用已覆盖退货率高于品类基准的其他众多品类。该费用按高退货率品类的每件退货收取，请在当前费用表中确认您所在品类的费率。对于退货率较高的产品，这是需分摊至每件售出产品的真实成本，而非仅针对退货产品。低销量产品（低于月度阈值）可能豁免该费用，请确认您的状态。

FBA versus FBM

FBA与FBM对比

When the seller is choosing fulfillment model, compute the per-unit total each way. The decision is not cost alone.
The FBM stack: pick/pack/labor, outbound carrier cost (also charged on dimensional weight), packaging materials, your own storage, no FBA fee, no Prime badge unless on Seller-Fulfilled Prime, lower Buy Box score.
  • FBA usually wins on small, light, fast-moving products. the Prime badge and the Buy Box advantage lift conversion enough to outweigh the fee.
  • FBM can win on large, heavy, slow-moving, or low-margin products where the FBA fee and storage would dominate, and on oversize items.
  • A product can also be split: FBA for the velocity and badge, FBM as overflow or for oversize variants.
当卖家选择配送模式时，需计算两种模式的单位总成本。决策不能仅看成本。
FBM成本结构包括：拣货打包人工成本、出库运费（同样按体积重量计费）、包装材料成本、自有仓储成本，无需支付FBA费用，除非加入卖家自配送Prime（Seller-Fulfilled Prime）否则无Prime标识，Buy Box评分较低。
  • FBA通常更具优势：适用于小型、轻便、周转快的产品。Prime标识和Buy Box优势带来的转化率提升足以抵消FBA费用。
  • FBM可能更划算：适用于大型、沉重、周转慢或低利润率的产品，此类产品的FBA费用和仓储成本占比过高，也适用于超大件商品。
  • 也可采用混合模式：用FBA保证销量和标识，FBM作为补充或用于超大件变体。

A note on rates and reimbursement (2025+ rules)

费率与赔偿说明（2025+规则）

Amazon's fee rates change each year. Quote the current Jan-Sep monthly storage rate per cubic foot for the off-peak window and the Oct-Dec rate for Q4, then have the seller verify both in the Seller Central fee schedule before final pricing. The same applies to the FBA fulfillment fee bands and the Q4 peak surcharge. mark every unverified rate with a warning symbol as an estimate.
Reimbursement policy changed in 2025. Amazon now reimburses lost or damaged inventory based on the manufacturing cost the seller provides, not on retail price. If the seller does not supply a manufacturing cost, Amazon uses a default that is typically lower than retail. for accurate returns and shrinkage modeling, set the manufacturing cost in Seller Central and use it as the returns-reserve baseline, not the selling price.
亚马逊的费率每年都会变化。非旺季（1-9月）采用当前月度立方英尺仓储费率，第四季度采用10-12月的费率，卖家需在最终定价前在卖家后台费用表中确认两者。FBA配送费档位和第四季度旺季附加费同样如此。所有未核实的费率需标注警告符号作为预估。
2025年赔偿政策有所调整。亚马逊现在会根据卖家提供的制造成本而非零售价，对丢失或损坏的库存进行赔偿。如果卖家未提供制造成本，亚马逊会使用默认值，通常低于零售价。为准确模拟退货和损耗情况，请在卖家后台设置制造成本，并以此作为退货准备金的基准，而非售价。

Step by step

操作步骤

  1. Collect inputs. Selling price, landed unit cost, product dimensions and weight, category, expected return rate, prep and inbound cost per unit, units per inbound shipment, expected monthly turnover, the dim divisor, and a realistic per-unit ad cost. Ask one compact follow-up for missing pieces. If the user does not know fee rates, use current ranges and mark them with a warning symbol as estimates to verify in the dashboard.
  2. Referral fee. Apply the category percentage to the price. note the small minimum.
  3. Billable weight and size tier. Compute actual weight and dimensional weight, take the greater as billable. Determine the size tier. Flag if the product is within 10 percent of the next tier boundary or if dimensional weight is the driver.
  4. Fulfillment fee. Look up the fee for the tier and billable weight. Add the Q4 peak surcharge if the plan covers Q4. If the category is high-return-rate (apparel, shoes, and others over the benchmark), add the Returns Processing Fee per returned unit, spread across units sold. verify the rate in the fee schedule.
  5. Storage. Compute the unit volume in cubic feet. Use the current Jan-Sep monthly rate for off-peak and the current Oct-Dec rate for Q4 (verify in dashboard). Divide across expected monthly turnover for a per-unit share. Add a long-term storage risk reserve for slow movers.
  6. Inbound and removal. Add the per-unit share of inbound shipping to Amazon. Reserve a small line for removal or disposal risk if the product is slow.
  7. Walk the rest of the stack. Unit cost, returns reserve (use the manufacturing cost in the reimbursement baseline), and the allocated ad cost.
  8. If a model comparison is wanted, build the FBM stack. Then compare per-unit totals plus the conversion and badge factor.
  9. Compute the results. Net profit per unit, net margin, and break-even ACoS.
  10. Flag the levers. If dimensional weight or a size-tier boundary is inflating the cost, note that a smaller or lighter package could move the product into a cheaper tier.
  11. Run the quality check, then deliver.
  1. 收集输入信息：售价、落地单位成本、产品尺寸及重量、品类、预期退货率、单位预处理及入库成本、每批入库数量、预期月度周转率、体积系数、合理的单位广告成本。若有缺失信息，可一次性补充询问。如果用户不知道费率，可使用当前范围并标注警告符号作为预估，提醒用户在后台核实。
  2. 计算推荐费：按品类百分比乘以售价计算，并注意最低收费标准。
  3. 确定计费重量与尺寸等级：计算实际重量和体积重量，取较大值作为计费重量。确定尺寸等级。如果产品距离下一等级边界不足10%，或由体积重量决定计费重量，需标注提醒。
  4. 计算配送费：根据尺寸等级和计费重量查找对应费用。如果计划覆盖第四季度，需加入旺季附加费。如果是高退货率品类（服装、鞋类及其他超出基准的品类），需将每件退货的处理费分摊至每件售出产品，并提醒用户核实费率。
  5. 计算仓储费：计算单位产品的立方英尺体积。非旺季采用1-9月的当前费率，第四季度采用10-12月的费率（需在后台核实）。按预期月度周转率分摊至单位产品。为周转慢的产品预留长期仓储风险准备金。
  6. 计算入库与移除费：加入单位产品分摊的亚马逊入库运费。如果产品周转慢，预留少量移除或处置风险费用。
  7. 梳理剩余成本项：单位成本、退货准备金（基于2025+赔偿规则中的制造成本）、分摊的广告成本。
  8. 如需对比模式，构建FBM成本结构：然后对比单位总成本及转化率、标识因素。
  9. 计算结果：单位净利润、净利润率及盈亏平衡ACoS。
  10. 标注关键影响因素：如果体积重量或尺寸等级边界推高了成本，需说明缩小包装或减轻重量可使产品进入更便宜的等级。
  11. 质量检查后交付结果。

Output format

输出格式

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FBA Profit. [product]

FBA利润计算结果. [产品名称]

Selling price: [$] Dimensions: [LxWxH] Actual weight: [x] Dimensional weight: [y] Billable weight: [the greater] Size tier: [tier]
售价: [$] 尺寸: [长×宽×高] 实际重量: [x] 体积重量: [y] 计费重量: [较大值] 尺寸等级: [等级]

Fee stack

费用结构

Referral fee: [-$] FBA fulfillment fee: [-$] (size tier: [tier], billable weight: [w]) Q4 peak surcharge: [-$] (if Q4 plan) Returns processing: [-$] (per returned unit, high-return-rate category, verify rate) Storage (per unit): [-$] (rate band: [Jan-Sep / Oct-Dec], verify in dashboard) Unit cost (landed): [-$] Returns reserve: [-$] (based on manufacturing cost, 2025+ rule) Prep + inbound: [-$] Aged-inventory risk: [-$] Ad cost (allocated): [-$]
推荐费: [-$] FBA配送费: [-$] (尺寸等级: [等级], 计费重量: [w]) 第四季度旺季附加费: [-$] (若包含第四季度计划) 退货处理费: [-$] (高退货率品类，按每件退货收取，需核实费率) 单位仓储费: [-$] (费率区间: [1-9月 / 10-12月], 请在后台核实) 落地单位成本: [-$] 退货准备金: [-$] (基于制造成本，2025+规则) 预处理+入库费: [-$] 滞销库存风险费: [-$] 分摊广告成本: [-$]

FBM comparison (if requested)

FBM对比（若请求）

Pick/pack/labor, carrier, packaging, storage . total [$] Recommendation: [FBA / FBM / split] . [reasoning including badge and conversion]
拣货打包人工、运费、包装、仓储... 总成本 [$] 推荐方案: [FBA / FBM / 混合模式]... [理由包含Prime标识及转化率]

Result

计算结果

Net profit per unit: [$] Net margin: [%] Break-even ACoS: [%]
单位净利润: [$] 净利润率: [%] 盈亏平衡ACoS: [%]

Flags and cost levers

提示与成本优化方向

[tier-boundary warnings, dimensional-weight driver, estimate warnings, thin-margin warnings, packaging-compression opportunities]
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[等级边界警告、体积重量驱动、预估提醒、低利润率警告、包装压缩建议]
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Worked example

示例计算

Product at 29.99 USD, large standard, 1.2 lb actual weight, dimensional weight 1.4 lb, landed cost 7.50.
Referral 15 percent is 4.50. Billable weight is 1.4 lb (dimensional drives). Fulfillment fee for the tier and band roughly 5.80. Storage share roughly 0.20 at the off-peak rate (verify in dashboard). Unit cost 7.50. Returns reserve roughly 0.45, baselined against the manufacturing cost not retail. Prep and inbound roughly 0.90. Allocated ad cost 3.00.
Net profit per unit roughly 7.64. Net margin roughly 25 percent. Break-even ACoS before ads roughly 35 percent. The product is healthy, but dimensional weight is the driver. compressing the packaging to lower the box volume would shrink the billable weight and the fee on every single unit sold. The product also sits within 10 percent of a tier boundary. heavier holiday packaging could push it up. plan Q4 packaging accordingly.
产品售价29.99美元，属于大型标准件，实际重量1.2磅，体积重量1.4磅，落地成本7.50美元。
推荐费15%即4.50美元。计费重量为1.4磅（由体积重量决定）。该等级和重量对应的配送费约5.80美元。非旺季仓储费分摊约0.20美元（需在后台核实）。单位成本7.50美元。退货准备金约0.45美元，基于制造成本而非零售价。预处理及入库费约0.90美元。分摊广告成本3.00美元。
单位净利润约7.64美元，净利润率约25%，广告前盈亏平衡ACoS约35%。该产品盈利状况良好，但体积重量是主要成本驱动因素。压缩包装以减小箱体体积可降低计费重量，进而减少每件产品的配送费。此外，产品距离等级边界不足10%，节假日包装增重可能使其进入更高等级，需提前规划第四季度包装。

Quality check

质量检查清单

  • All seven stack layers are included. no missing storage, returns, or prep lines.
  • Billable weight is the greater of actual and dimensional weight, and it is stated.
  • A product driven by dimensional weight is explicitly flagged.
  • The fulfillment fee is derived from size tier and billable weight, not from price.
  • A high-return-rate category includes the Returns Processing Fee per returned unit, with the rate marked for verification rather than hardcoded.
  • Any product within 10 percent of a tier boundary is flagged.
  • Storage uses the current Jan-Sep or Oct-Dec rate band, marked as a dashboard verification, not a hardcoded number.
  • Returns reserve is anchored to manufacturing cost (2025+ reimbursement rule).
  • Fee rates the user did not supply are marked as estimates with a warning symbol.
  • Net margin and break-even ACoS are both reported, not only net profit.
  • If FBM is in scope, the comparison weighs the Prime badge and conversion, not just cost.
  • 包含全部七层成本结构，无遗漏仓储、退货或预处理项。
  • 计费重量取实际重量和体积重量的较大值，并明确标注。
  • 明确标注由体积重量驱动计费的产品。
  • 配送费由尺寸等级和计费重量得出，而非售价。
  • 高退货率品类包含每件退货的处理费，费率标注为待核实而非硬编码。
  • 距离等级边界不足10%的产品需标注提醒。
  • 仓储费采用当前1-9月或10-12月的费率区间，标注为待后台核实而非硬编码数值。
  • 退货准备金基于制造成本（2025+赔偿规则）。
  • 用户未提供的费率标注为预估并带有警告符号。
  • 同时报告净利润率和盈亏平衡ACoS，而非仅净利润。
  • 若涉及FBM对比，需综合考虑Prime标识和转化率，而非仅成本。

Common mistakes

常见错误

  • Price minus cost equals profit. Ignoring three Amazon fees and three cost lines.
  • Forgetting storage and returns. Small per-unit numbers that quietly erase a thin margin.
  • Budgeting on scale weight. A bulky light product is billed on volume. the real fee can be several times the guess.
  • Ignoring the size tier. A product an inch into the next tier can be unprofitable while a nearly identical one is fine.
  • Forgetting inbound shipping. The cost to get inventory to Amazon is part of fulfillment and is routinely omitted.
  • No ad cost in the math. A unit that is profitable before ads can be a loss after.
  • Using off-season storage rates for Q4. Q4 storage is far higher. a Q4 plan needs the Q4 rate.
  • Quoting retail for reimbursement. Under the 2025+ rule, reimbursement is on manufacturing cost, not retail. Set it in Seller Central or accept Amazon's default.
  • FBA versus FBM on cost alone. FBM can look cheaper while quietly costing the Prime badge, the Buy Box, and conversion.
  • 认为售价减成本等于利润：忽略了三项亚马逊费用和三项成本项。
  • 忘记仓储费和退货成本：看似小额的单位成本会悄然吞噬微薄的利润率。
  • 按实际重量预算运费：轻但体积大的产品按体积计费，实际费用可能是预估的数倍。
  • 忽略尺寸等级：仅超出下一等级边界一英寸的产品可能无利可图，而几乎相同的产品却盈利良好。
  • 忘记入库运费：将库存运往亚马逊的成本是配送成本的一部分，常被遗漏。
  • 计算时未纳入广告成本：广告前盈利的产品可能在计入广告后亏损。
  • 第四季度使用非旺季仓储费率：第四季度仓储费远高于非旺季，第四季度计划需使用对应费率。
  • 按零售价计算赔偿：根据2025+规则，赔偿基于制造成本而非零售价。需在卖家后台设置制造成本，否则接受亚马逊的默认值。
  • 仅按成本对比FBA与FBM：FBM看似成本更低，但可能失去Prime标识、Buy Box及转化率。

Built by Jay GPT Pro

由Jay GPT Pro开发

Part of Amazon Pro Skills. Production-grade skills for serious Amazon sellers. Free and open. Built by Jay Margaliot.
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属于Amazon Pro Skills系列，为专业亚马逊卖家打造的实用工具。免费开源，由Jay Margaliot开发。
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