How Amazon FBA Fee Changes Make Automated Repricing Non-Negotiable
Last verified: July 2026
Amazon raised its FBA fees on January 15, 2026. For most sellers, the average increase was $0.08 per unit , modest enough to dismiss. For sellers with small items priced over $50, the increase was $0.51 per unit. Neither figure appeared as a warning in any dashboard. The margin got smaller, quietly, while the tool kept repricing.
TL;DR: Amazon's 2026 FBA fee change moved the break-even point on every affected SKU the moment it took effect. Sellers running a typed minimum price absorbed the cost invisibly. Sellers whose floor is calculated from live cost inputs saw it update automatically. This guide covers what changed, how to recalculate your minimum after the fact, how to update your floors in Repricer, and how to stop this from happening again.
What changed in Amazon's 2026 FBA fee structure
Amazon raised FBA fulfilment fees effective January 15, 2026. The average increase was $0.08 per unit , but the average hides a significant range across size tiers.
According to Supply Chain Dive and Modern Retail's reporting, the fee increases by size tier were:
Referral fee percentages were unchanged. No new fee types were added.
Amazon gave sellers at least 90 days' notice before the January 15 effective date. That window is the one most sellers did not use. By the time the change took effect, typed minimum prices were already wrong for every affected SKU.
One number that puts the scale of this in context: according to Modern Retail, Amazon earned more than $150 billion in seller fees in 2024. A fee increase of even 0.5% on that base represents meaningful additional cost distributed across Amazon's entire third-party seller population.
How to recalculate your minimum prices after the fee change
The minimum price formula is unchanged. The FBA fee input is now different. Recalculate the formula with the current fee, and the new correct minimum follows.
Minimum price = (landed cost + FBA fee + inbound shipping + returns provision + target margin) ÷ (1 − referral fee %)
Worked example using the updated January 2026 fee:
The new minimum is $0.08 higher than the old one. That $0.08 represents the exact gap that went unaccounted for on every sale since January 15 on this product. At 500 units per day, that is $40 per day, $1,200 per month, or $14,600 per year , on a single SKU.
For a seller in the small-items-over-$50 tier (the $0.51 increase), the same calculation produces a $0.55 gap in the calculated minimum. At 500 units per day: $100 per day, $3,000 per month, $36,500 per year.
To find the correct FBA fee for your specific product: In Seller Central, navigate to Inventory, then use the FBA Revenue Calculator. Enter your ASIN or search by keyword. The calculator pulls the live fee for your product's actual size and weight tier.
Step-by-step: updating your floor prices in your repricer
Once you have the correct minimum for each affected SKU, update your repricer before the next sale. Speed matters here , every sale below the corrected floor is a loss.
Step 1: Identify affected SKUs. In Seller Central, go to Reports, then Fulfilment by Amazon, then Fee Preview. This report shows the current FBA fee for every ASIN in your catalogue. Download it and compare to the fees your minimum prices were calculated from. Any ASIN where the fee has increased is affected.
Step 2: Recalculate the minimum for each affected SKU. Apply the formula above with the new FBA fee figure. For a large catalogue, a spreadsheet with the formula applied per row handles this in minutes.
Step 3: Update the minimum price field in Repricer. For individual ASINs: navigate to the product in Repricer, open the pricing settings, and update the floor price field. For bulk updates: export your product settings as a CSV from Repricer, update the minimum price column with the recalculated figures, and reimport.
Step 4: Verify the new floor holds in practice. After applying updates, check that your current live price is at or above the new minimum on each affected ASIN. If the repricer had already been pricing at the old floor, the current price is now below the corrected floor and must be raised manually before resuming automated repricing.
Book a Demo , connect your cost data to Repricer.com and enforce the correct margin floor after every fee change automatically.
How Net Margin Repricing automatically adjusts for fee changes
A floor derived from cost inputs updates when the inputs change. A typed floor does not. This is the entire difference between a repricer that protects margin and one that silently erodes it.
Profit Protection stores your cost structure rather than a price. You enter landed cost, target margin, category (which determines the referral rate), and returns provision. Repricer calculates the minimum price from those inputs. When Amazon's fee schedule updates, the fee in the formula updates. The minimum updates. You receive correct floors without manual intervention.
The fee-change argument for automated repricing is different from the usual Buy Box win rate argument. It is not about being faster than competitors. It is about floor accuracy. A repricer executing accurate moves against an incorrect baseline is losing margin in the background regardless of its Buy Box performance. Net Margin Repricing removes the incorrect baseline by deriving the floor from live inputs.
For the detailed cost calculation and every fee component that belongs in the stack, the Amazon seller fees guide covers the full methodology including the components sellers most frequently miss.
Why sellers who don't update minimums will sell at a loss
Two categories of seller absorb the most damage from an unacknowledged fee increase.
Sellers with floors set close to break-even. A seller who set their minimum at $0.10 above the old break-even on a SKU in the small-standard $10 to $50 tier is now $0.15 below break-even on every sale at floor. They intended a $0.10 margin buffer. They are now losing $0.15 on every sale at the minimum. Nothing in the dashboard identifies this.
Sellers with large catalogues who review floors infrequently. A seller managing 2,000 SKUs with quarterly floor reviews last updated their minimums in October 2025. They have been underpriced since January 2026. Seven months of sales across an affected catalogue at even a $0.08 gap represents substantial cumulative loss , not from a repricing error, but from an outdated input that the tool had no way to know about.
The case for automated pricing usually rests on Buy Box wins and time saving. The fee-change case is different: a repricer goes as low as your floor and no lower. Its accuracy equals the accuracy of the floor you entered. When that floor stops reflecting actual costs, the repricer is executing perfect moves in the wrong direction.
Staying ahead of Amazon fee changes going forward
Amazon has changed its FBA fee schedule in January for multiple consecutive years. Treating each January as a floor-review trigger is the minimum necessary cadence.
Three habits that catch fee changes before they cost money:
Subscribe to Seller Central fee announcements. Amazon communicates fee changes via email and via the Seller Central notification centre. The 2026 changes were announced with 90 days' notice. A seller who reviewed that announcement and recalculated floors in October 2025 had correct minimums on January 15.
Set a Q4 floor recalculation as a recurring calendar event. December is the window. Amazon's fee changes take effect in early January. A December floor review catches the incoming change with three to four weeks to update before it goes live.
Switch from typed floors to cost-calculated floors. The repricing rules guide covers the design principles for durable repricing configurations. The core principle: floors derived from inputs survive fee changes automatically, typed floors do not.
Key Takeaways
The 2026 fee increase was not uniform. Small items over $50 saw $0.51 per unit. Large standard items $10 to $50 saw $0.05. The average of $0.08 applies to neither category specifically.
Every seller with a typed minimum price is underpriced. If the floor was not recalculated from the new fee figures after January 15, 2026, the floor is wrong. The gap is $0.05 to $0.51 per unit depending on size tier.
The formula is: (fixed costs + margin) ÷ (1 − referral rate %). Apply it with the current FBA fee from the Fee Preview report or Seller Central's Revenue Calculator.
Profit Protection derives the floor from cost inputs, not from a typed number. When fees change, the floor recalculates. This is the difference between margin protection and margin erosion.
December is the window. Amazon announces January fee changes in Q4. A December floor review costs 2 hours and prevents months of compounding loss.
Action Plan
Download the Fee Preview report from Seller Central (Reports, then Fulfilment by Amazon, then Fee Preview). Compare the current FBA fee per ASIN to the fee figure your minimum prices were calculated from.
Identify every ASIN where the FBA fee changed. For most sellers, this is every standard-size product affected by the January 2026 change.
Recalculate the minimum price for each affected ASIN using the formula above with the updated fee. Note the gap between old minimum and new minimum.
Update the minimum price in Repricer for every affected ASIN. Single-ASIN: directly in the product settings. Large catalogue: bulk CSV export, update the minimum column, reimport.
Verify that live prices are at or above the new minimums. If any ASIN is currently live below the new floor, raise the price manually before re-enabling repricing.
Frequently Asked Questions
What are Amazon's new FBA fees for 2026?
Amazon raised FBA fulfilment fees effective January 15, 2026. The average increase across all products was $0.08 per unit. The actual range was $0.05 for large standard items priced $10 to $50, up to $0.51 for small items priced over $50. Multi-Channel Fulfilment fees increased an average of $0.30 per unit. AWD storage in the West region rose 19%. Referral fee percentages were unchanged.
How do I update my minimum prices after a fee change?
Recalculate your break-even using the updated FBA fee from Seller Central's Fee Preview report: landed cost plus the new FBA fee plus referral fee plus inbound shipping plus returns provision, divided by one minus your referral rate. Add your target margin to the fixed cost stack before dividing. Apply the new minimum to your repricer for each affected ASIN. If your repricer calculates floors from cost inputs rather than stored numbers, the floor updates automatically.
Will the fee change affect my Buy Box eligibility?
Not directly. Buy Box eligibility depends on seller performance metrics, fulfilment method, and price competitiveness, not on fee structure. The indirect effect: if you raise your minimum price to cover the fee increase, your offer becomes less competitive on some ASINs. That trade-off is correct. Selling at a margin you have actually accounted for beats winning the Buy Box at a margin lower than you intended.
How often does Amazon change FBA fees?
Amazon has changed its FBA fee schedule in early January for multiple consecutive years. Changes are typically announced in Q4 with 30 to 60 days' notice via Seller Central communications. Treat Q4 as the standard floor-review window each year, and recalculate floors immediately after any fee announcement , not at the next scheduled review cycle.
What is the difference between a flat minimum and a cost-calculated minimum?
A flat minimum is a typed number: "never sell below $18." A cost-calculated minimum derives from your actual cost structure: landed cost plus FBA fee plus referral fee plus returns provision plus target margin, recalculated whenever any input changes. The flat minimum becomes wrong the moment any cost input moves and does not update on its own. The cost-calculated minimum stays current because the formula re-derives the floor from live inputs. Sellers running flat minimums after the January 2026 fee change are selling below their intended margin on every sale at floor.
Book a Demo , connect your cost data to Repricer.com and enforce the correct margin floor automatically after every fee change.
