Amazon Repricing: How to Stop Selling at a Loss and Fix Your Minimum Prices
You might be selling at a loss right now. Not on your worst SKUs , you know those are thin. On the ones your dashboard calls your best performers. The high-volume lines. The ones with 800 reviews and 4.7 stars and a Buy Box win rate that looks excellent from every angle.
The tell is in the Payments report, not the Orders report. Orders measure revenue. Payments measure what actually left Amazon's hands and arrived in yours, after every fee. When sellers first run that comparison properly , with every fee included , the gap is often uncomfortable.
According to Jungle Scout's seller profitability research, 13% of Amazon sellers are not profitable at all, and the average net margin across third-party sellers is 21%. The sellers below zero are almost never the ones sourcing badly. They are the ones pricing with a floor that does not account for every cost Amazon charges.
TL;DR: This guide runs the full minimum price calculation from unit cost to correct floor price, with a worked example showing the specific numbers, and shows how to update every floor in your catalogue before another unit sells below cost. Net Margin Repricing prevents the problem from recurring automatically. But first you need to know the correct number.
How Amazon sellers end up selling below cost , more common than you think
The most common cause of selling below cost is a floor set as a round number rather than a calculated one.
A seller calculates their costs approximately , "landed cost is about $9, fees are roughly $5, so $14 feels safe" , and enters $14.00 as their minimum. The problem is that "roughly $5 in fees" is actually $6.25 once inbound shipping, the returns provision, and the current FBA fee tier are included. The floor should be $15.25 just to break even, and $17.95 to reach 30% margin. The seller has been confidently losing money on every sale below $15.25 since they set the floor.
According to Marketplace Pulse, active Amazon sellers dropped from 2.4 million in 2021 to 1.65 million by the end of 2025 , a period Marketplace Pulse calls the "Great Compression." Multiple forces squeezed margins simultaneously: fee increases, rising ad costs, and intensifying competition. The sellers who did not survive were not all poorly sourced or under-capitalised. Many were priced correctly against costs that had stopped being correct.
Five ways sellers end up below cost without realising it:
The typed floor. A flat dollar number entered once, never recalculated. Works until any input changes.
The fee-increase blind spot. Amazon raised FBA fulfilment fees by an average of $0.08 per unit in January 2026, with small items in the $10 to $50 range seeing a $0.25 increase. A floor set in December 2025 became wrong on January 15, 2026. Sellers who did not update it have been underselling their margin since then.
Missing the returns provision. Returns cost you the fulfilment fee (which Amazon does not refund), plus return processing fees, plus disposal or repackaging costs. In apparel, this can be 15 to 20% of revenue. A floor that doesn't price in returns is a floor that assumes everything sells cleanly , which it doesn't.
The referral fee miscalculation. Amazon's referral fee is a percentage of the selling price, not the profit. On a $24.99 product in an 8% referral category, that's $2.00. On a $12.00 product in the same category, that's $0.96. If your floor dropped to $12.00 but your calculation assumed $2.00 in referral fees, the calculation is wrong by a dollar.
The DIM weight trap. Amazon charges the greater of actual weight or dimensional (DIM) weight. A product that weighs 1.5 lb but ships in a 12" × 10" × 8" box has a DIM weight of 6.9 lb under the 2026 divisor of 139. The fee for 6.9 lb is significantly higher than the fee for 1.5 lb. Sellers who use the weight on the product label rather than calculating DIM often have an FBA fee that is wrong by a dollar or more per unit.
The complete cost stack: every fee that belongs in your minimum
Your minimum price must account for every cost between you and the customer, or it is not a real minimum.
The three most commonly omitted: returns provision, inbound shipping per unit, and the DIM weight uplift on the FBA fee.
The referral fee deserves a note. Most sellers know their category rate (often 8% for electronics, 15% for most general merchandise, 17% for apparel above $15). What catches sellers is that Amazon also charges a minimum referral fee of $0.30 per transaction , which becomes relevant on any product priced below $2.
For the current fee schedule per category, the Amazon seller fees guide covers the full breakdown including the categories with non-standard rates.
Step-by-step: calculating your true break-even minimum price
Run this calculation for each SKU. The answer tells you whether your current floor is correct.
Step 1: Total your true landed cost.
Add: purchase price per unit from supplier invoice, plus inbound freight to Amazon divided by number of units, plus import duties and customs broker fee if applicable, plus inspection fees if applicable, plus prep fees if using a third-party prep centre.
This is not your supplier's listed unit cost. It is the total cost to get one unit from your supplier to an Amazon fulfillment centre.
Step 2: Look up the exact FBA fulfilment fee.
Find your product's actual dimensions and weight on the shipping box, not the product label. Calculate dimensional weight: (length × width × height) ÷ 139. The FBA fee is based on the greater of actual or dimensional weight. Look up the fee tier in Seller Central under Fulfilment by Amazon, then Fee Schedule.
Step 3: Calculate the referral fee at your floor price.
Referral fee = your category's referral percentage × the minimum price you will calculate. Because the minimum price is what you are solving for, use an estimate for this step. If your estimated minimum is around $18, use 8% × $18 = $1.44. You will refine this in Step 5.
Step 4: Add inbound shipping, returns provision, and storage.
Inbound shipping: total inbound freight cost for the most recent shipment ÷ number of units.
Returns provision: your category's average return rate × (FBA fee + Amazon's return processing fee of approximately $0.50 to $2.50 depending on size). A simpler approximation: 2.5% of selling price as a flat provision.
Storage: monthly storage rate × your product's cubic feet × average months in FBA before sale.
Step 5: Calculate the minimum and refine once.
Add all fixed costs (Step 1 + Step 2 + Step 4):
Fixed costs = landed cost + FBA fee + inbound + returns + storage
Minimum price (break-even) = fixed costs ÷ (1 − referral rate %)
For a minimum with target margin:
Minimum price = (fixed costs + target margin in dollars) ÷ (1 − referral rate %)
Refine once: recalculate the referral fee at your calculated minimum price. If the new referral fee amount is different from Step 3 by more than $0.10, adjust fixed costs and recalculate. One iteration is usually sufficient.
A worked example: from unit cost to correct floor price
The following example uses a standard-size product in a general merchandise category. The numbers are specific so you can follow the calculation.
Product: household storage item Category referral rate: 8% Target margin: 30% of landed cost
Target margin = 30% of $9.00 landed cost = $2.70
Fixed costs + margin = $13.20 + $2.70 = $15.90
Minimum price = $15.90 ÷ (1 − 0.08) = $15.90 ÷ 0.92 = $17.28
Refine: referral at $17.28 = 8% × $17.28 = $1.38.
Revised returns provision at $17.28 = 2.5% × $17.28 = $0.43 (down from $0.45).
Revised total = $9.00 + $3.18 + $0.45 + $0.43 + $0.12 + $2.70 = $15.88
Revised minimum = $15.88 ÷ 0.92 = $17.26
The floor for this product is $17.26. Any sale below this price results in a net loss.
If this seller's current floor is $14.00 , a common "felt safe" number , they are losing $3.26 on every unit sold at floor. At 100 daily units: $326 per day. At 200 daily units: $652 per day, or $19,560 per month.
Good news: finding this is the hardest part. Fixing it takes less than an hour.
Uploading your corrected minimum prices to your repricer
Once you have the correct floor for each affected SKU, update your repricer before the next sale.
For a single ASIN: update the minimum price field directly in your repricer's product settings. This takes about 90 seconds per ASIN. Do it now, before reading any further, if you already know your correct floor and your current floor is wrong.
For a catalogue-level update (10 or more SKUs): most repricers support bulk minimum price uploads via CSV. In Repricer, go to your product list, export a CSV of current settings, update the minimum price column with your corrected floors, and reimport. The bulk approach is the only practical option at catalogue scale.
For ongoing accuracy: connect your cost data to Profit Protection rather than entering flat numbers. Enter landed cost, select your FBA fee category, set a returns percentage and target margin. Profit Protection calculates the minimum price from these inputs rather than storing a typed number. When any input changes , including when Amazon updates its fee schedule , the floor recalculates automatically.
After updating, spot-check three things:
Does the repricer's minimum field show the new number? Navigate to the ASIN and confirm.
Has the current price held above the new minimum on any live listing? If the repricer has already been pricing below the new floor, your current price may be at or below the correct minimum. You may need to manually raise the price before the repricer can resume normal operation.
Are any active rules attempting to price below the new floor? A price war rule or velocity clearance rule set too aggressively may conflict with the corrected floor. Check for rule conflicts before going live.
How Net Margin Repricing prevents this from happening again
The reason this problem is so common is that typed floors go stale. The solution is floors that calculate rather than store.
A flat minimum price is a guess about what the future will hold. It is correct on the day you calculate it and silently wrong from the moment any input changes. Amazon's January 2026 fee increase changed one input for every standard-size FBA seller. Sellers with typed floors absorbed the increase as invisible margin loss. Sellers with cost-calculated floors saw their minimums update automatically.
Profit Protection's approach: you enter your cost structure , landed cost, fee category, returns percentage, target margin , and the system calculates the minimum rather than storing one. The floor is always landed cost plus fees plus your margin target, expressed as a live calculation rather than a historical number.
Three scenarios where this matters:
Amazon changes a fee (happens annually). The fee in the calculation updates. The floor updates. You did not need to remember that the fee changed.
Your landed cost increases because your supplier raised prices. You update the landed cost input. The floor increases accordingly. Every ASIN using that cost group recalculates in the same update.
You change your target margin (expanding into a new product line with higher margin requirements). Update the margin input. Every affected floor recalculates.
For the full feature detail, see Profit Protection. For how the margin calculation methodology works across all channels, the net margin guide covers every cost component including the ones that only apply on Amazon.
Book a Demo , let Net Margin Repricing calculate and enforce your minimum price automatically, so the floor stays correct when fees change.
The retrospective: what the incorrect minimum price cost you
Run this calculation after fixing your floor, not before. The answer is useful for financial planning; it is not useful for making you feel bad.
For each affected ASIN:
Daily unit sales × (correct minimum − wrong minimum) × days floor was wrong = approximate margin loss
Example: 150 units/day × $3.26 (the gap from the worked example) × 90 days = $43,965 in unrecovered margin over a quarter.
This is the cost of the old floor, approximately. It is not recoverable. But it is useful for two things: calculating the correct quarterly earnings (down from what the Orders report showed) and understanding the urgency of keeping the floor accurate going forward.
The worked example above used a $3.26 gap. Sellers who set their floor well below break-even , $12 instead of $17, not uncommon on products where the seller guessed costs rather than calculated them , see much larger figures. Which is uncomfortable to look at, but less uncomfortable than letting it continue.
Once the correct floor is in place and confirmed in your repricer, the historical loss is sunk. The next 90 days is the relevant calculation , and it has the correct floor in it.
Key Takeaways
Thirteen percent of Amazon sellers are not profitable. The most common cause is a floor that does not account for every cost Amazon charges.
The complete cost stack: landed cost + FBA fee + referral fee + inbound shipping + returns provision + storage + target margin. Missing any one makes the floor wrong.
Typed floors go stale. A flat dollar amount is correct on the day you calculate it and wrong from the moment any input changes. Amazon changed FBA fees in January 2026; typed floors did not update.
The correct minimum for the worked example is $17.26. If your floor is below your real break-even, every sale below that number is a loss.
Fix the floor before the next sale. Update the minimum price field now for any ASIN where the current floor is below the corrected calculation.
Cost-calculated floors prevent the problem from recurring. Profit Protection recalculates the floor when any input changes, including when Amazon adjusts its fee schedule.
Numbered Action Plan
Pull your Payments report for your top 10 ASINs. Compare what Amazon actually paid out (net revenue) per unit to your original cost estimate. Any ASIN where the payout is close to or below your expected break-even is a priority for Step 2.
Run the 5-step calculation for each priority ASIN. Use the formula above with the actual 2026 FBA fee from Seller Central, your real landed cost, and the correct DIM weight for your product.
Compare the calculated floor to your current minimum price. Note the gap. Calculate the daily margin loss: daily units × gap = daily loss.
Update the minimum price in your repricer immediately for any ASIN where the gap is more than $0.10. Single ASIN: update directly. Multiple ASINs: bulk CSV upload.
Run the retrospective calculation to understand the impact: daily units × gap × days floor was wrong. This is your Q-end restatement figure.
Switch to cost-calculated floors going forward. Enter your landed cost, FBA fee category, returns percentage, and target margin into Profit Protection. The floor will recalculate automatically after every Amazon fee change.
FAQ
1. How do I know if I am selling at a loss on Amazon?
The clearest signal is the gap between your Orders report and your Payments report. The Orders report shows gross revenue. The Payments report shows what Amazon actually transferred after fees. Pull both for the same period and divide by units. If the per-unit Payments figure is below your landed cost plus fulfilment fee, you are selling at a loss on those SKUs. The more precise check is the full 5-step calculation above, which includes the components the gap estimate can miss.
2. How do I calculate my Amazon break-even price?
Break-even = (landed cost + FBA fee + inbound shipping + returns provision + storage) ÷ (1 − referral fee %). All fixed costs go in the numerator. The referral rate , which is a percentage of the selling price , comes out of the denominator. For a 30% target margin, add your target margin amount to the numerator before dividing.
3. What costs must I include in my Amazon minimum price?
Every cost between you and a successful sale: landed cost (COGS plus inbound freight), FBA fulfilment fee (using DIM weight, not actual weight if DIM is larger), Amazon referral fee for your category, inbound shipping per unit, a returns provision for your category's return rate, monthly storage, and your target margin. The most commonly missed are the returns provision and the DIM weight uplift on the FBA fee.
4. How do I quickly update my minimum prices across my catalogue?
Most repricers support bulk CSV upload. Export your current product settings, update the minimum price column with the recalculated floors, and reimport. In Repricer, this is available under the product management section. For ongoing accuracy, switching from flat floors to cost-calculated floors (Profit Protection) means you update cost inputs once rather than individual minimums whenever fees change.
5. Why does my floor keep becoming wrong?
Because it is stored as a typed number rather than calculated from inputs. A typed floor is a snapshot of what costs looked like on the day you entered it. Amazon's fee changes, supplier price moves, and category referral rate adjustments all change the real break-even without changing the number in your repricer. Cost-calculated floors solve this permanently: the floor recalculates from live inputs rather than holding a historical figure.
Book a Demo , once your floors are corrected, Repricer.com enforces them automatically and recalculates them when your costs change.
