Amazon FBA Fee Audit 2026: 16 Hidden Fees Killing Your Profits

Written by: Devjeet  |  Published: July 9, 2026  |  Last verified: July 9, 2026

Amazon has undergone numerous fee revisions in 2026. These changes affect every seller, and most don't even realize they're paying more. The sellers losing the most money aren't making mistakes; they just need to update their numbers.

All of this information is available to you. Every fee, every update, and every rate change is sitting inside your Seller Central account right now. But the challenge is it's spread across many different reports that update at different times, making it very easy to miss if you're not regularly checking. Small extra charges rarely feel like a big deal until you add them all up and realize how much they've been costing you.

This guide puts sixteen of the most important fee changes in one place and explains each one in simple, everyday language. For every fee, we'll tell you what it is, why it's eating into your profit, what you can do about it, and exactly where to find it in your Seller Central account. By the end, you'll know exactly where your money is going and how to keep more of it.

The 16 Fees at a Glance

If you want to check your own account against this list, everything below points you to the exact place in Seller Central to look. Last verified: July 8, 2026.

1. Aged Inventory Surcharge (181+ Days)

This means that if your product is stored in Amazon's warehouse for more than 181 days, you'll be charged an additional fee in addition to the regular storage cost.

Most sellers don't notice this charge because it doesn't show up as a big warning; it just quietly gets added to your monthly bill. The longer your item stays in the Amazon Fulfillment Center, the more money you pay per cubic foot, from only $0.50 for 181 days to as high as $7.90 per cubic foot or $0.35 per unit, beyond 456 days. Amazon always charges whichever is higher, which is either per cubic foot or per unit, so the cost multiplies exponentially.

How to Fix It?

Keep an eye on any product that's been in the warehouse for 120+ days. At that point, either run a discount or deal to sell it faster or request that Amazon send it back to you. Paying to get it back is almost always cheaper than letting the extra charges pile up.

How to Check in Seller Central

1. Go to Inventory > FBA Inventory in the top navigation.
2. Click the "Inventory Age" tab or use the filter to sort by "Days in Storage."
3. Look for units in the 150 to 180 day column and flag any approaching the threshold.
4. Alternatively: Reports > Fulfillment > Inventory > Select the "Inventory Age" report and download it as a CSV for bulk review.
5. Double check with the "Recommended Removals" report for action items.

2. Low Inventory Level Fee (FNSKU Level)

If a specific variant of your item, a size, or a color runs low relative to how quickly it's selling, Amazon charges a low-inventory fee on every unit of that variant you sell. The fees vary between $0.32 and $0.57, depending on the size of your item and the level of inventory.

When both your last 30 days and last 90 days of stock fall below 28 days of supply, Amazon charges a low-inventory fee on every unit sold because low stock limits its ability to store your product across multiple warehouses and deliver it quickly. The fee is calculated per individual variation (FNSKU), not your overall product, so even one understocked size or color gets charged on every sale it makes.

You might think you're fully stocked because your main product listing looks fine, but Amazon now checks each individual variation separately. So your overall stock can look fine while one fast-selling size or color could be quietly racking up fees on every single sale, and you won't notice until your payout is lower than expected.

How to Fix It?

Don't just track stock at the overall product level; track it for each individual variation. Set a restock alert for when any variation reaches 35 days of supply, not 28 days, to keep a 7-day buffer for peace of mind.

How to Check in Seller Central

1. Go to Inventory > FBA Inventory.
2. Use the "Days of Supply" column to identify any FNSKU below 35 days.
3. Filter by "Child ASIN" view to see variation-level data rather than parent-level rollups.
4. For detailed tracking: Reports > Fulfillment > Inventory > "Manage FBA Inventory" report, then filtered by FNSKU.
5. Seller Central will also show a low-stock badge on listings approaching the threshold in the Manage Inventory view.

3. Inbound Placement Fee

When you send all your inventory to just one Amazon warehouse, Amazon charges you a per-unit fee to move it across its network. In 2026, this fee was restructured with tighter weight brackets, pushing more products into higher-cost ranges; standard-size items now run between $0.14 and $0.32 per unit, depending on weight.

Sending to one location feels easier: one pickup, one label, one drop-off. But that convenience now comes with a direct cost on every single unit in every shipment. It's easy to miss because it's buried in your total fulfillment cost rather than appearing as its own line item.

How to Fix It?

Before your next shipment, compare what you'd pay in placement fees versus what it would cost to split the shipment across two or three warehouses yourself. For large or heavy products, splitting usually saves more money.

You can also use Amazon's "Optimized Shipment Splits" option when creating a shipment; if you're sending 5+ identical cartons, you may qualify for a $0 placement fee. Sellers using Amazon Warehousing & Distribution (AWD) skip this fee entirely.

How to Check in Seller Central

1. During shipment creation: Inventory > Send to Amazon > choose "Amazon-Optimized Splits" to see the $0 placement option vs. the per-unit fee for minimal splits.
2. To review past charges: Reports > Payments > Transaction View, filter by "FBA Inbound Placement Service Fee."
3. Use the Fee & Economics Preview report under Reports > Fulfillment > Fee Preview to see placement fee estimates before creating a shipment.
4. For AWD eligibility: Inventory > Amazon Warehousing & Distribution to check enrollment options.

4. Fuel & Logistics Surcharge (3.5%)

According to the update on Amazon Seller Central, an additional 3.5% will be charged on fulfillment fees above the standard FBA per-unit fee, effective from April 17, 2026, onward. It's not a fixed dollar amount; it scales with your product's size tier, so larger products pay more, and it increases every time Amazon raises its base fulfillment rates.

Because it's a percentage, not a flat fee, the actual cost is higher than it looks. If your last margin analysis was before April 2026, you're probably underestimating your true cost per unit.

How to Fix It?

In your profit analysis, make sure you use 3.5% as an ongoing multiplier in addition to your existing fulfillment fee. Every time Amazon updates its base rates, this surcharge adjusts accordingly, so build a habit of re-running your SKU-level margins after any fee change.

If a product was already close to breakeven, this surcharge alone could be pushing it into a loss.

How to Check in Seller Central

1. Go to Reports > Payments > Transaction View.
2. Set the start and end dates after April 17, 2026, with fee type as a filter and look for "Fuel and Inflation Surcharge."
3. Compare with the information available on the Profit Analytics dashboard: Reports > Profit Analytics > Fee Breakdown per SKU.
4. Calculate new costs using the FBA Revenue Calculator (search "FBA Revenue Calculator" in Seller Central Help) before adjusting prices.

5. Storage Utilization Surcharge

If your stock levels are too high compared to how fast your products are selling, Amazon charges an extra monthly fee on that excess inventory. Once your stock exceeds roughly 22 weeks of supply for non-dangerous products, you'll pay a storage utilization surcharge of $0.23 to $0.44 per cubic foot for oversized and standard-sized items, respectively, during the off-peak period. For dangerous goods products, these fees can go up to $0.99 for a standard-size product (per cubic foot) and $0.78 for an oversize product (per cubic foot) in an off-peak period.

This is a separate charge from the Aged Inventory Surcharge; a unit can incur both at once if it's slow-moving and overstocked, so check your inventory against both thresholds, not just one.

Your inventory doesn't need to sit for 181+ days to trigger this fee; if it's building up faster than it's selling, the charge applies. This is especially common heading into Q4, when sellers bring in large safety stock early and end up paying a surcharge on units that haven't even had a chance to sell yet.

How to Fix It?

Keep a regular eye on your IPI score in Seller Central and aim to stay above 400. Start slowing replenishment once your weeks-of-cover hits 18 weeks to stay safely under the 22-week threshold.

If you're already over, run a promotion or remove excess units; a one-time removal fee is almost always cheaper than a recurring monthly surcharge.

Aged Inventory vs. Storage Utilization: the same root cause, two different meters.

Both fees are downstream of the same thing: your Inventory Performance Index (IPI) score. Aged Inventory charges you for how long a unit sits; Storage Utilization charges you for how much you're holding relative to how fast it sells. A low IPI score (below 400) is Amazon's way of telling you both meters are likely running at once. Treat it as the early warning system for both fees, not just one.

How to Check in Seller Central

Inventory > Inventory Planning > IPI Dashboard

6. Q4 Peak Storage Fees

Amazon's storage fees jump high during October through January, from $3.51 per cubic foot for standard-size products priced between $10 and $50, excluding apparel. This applies to every unit in an Amazon warehouse during the holiday season, no matter how long it's been stored.

Sellers who stock up for Q4 too early end up paying peak storage rates on inventory that's just sitting idle, waiting for demand to pick up. Every extra week of stock held in October or November is costing higher than the normal rate, and most sellers don't notice until the settlement report lands at the end of the month.

How to Fix It?

Time your Q4 shipments to arrive closer to when demand actually hits, rather than weeks in advance. Use August and September to clear out slow-moving inventory while storage rates are still low. If you need to hold bulk stock, consider Amazon Warehousing & Distribution (AWD) as a cheaper buffer and feed FBA in smaller batches as needed.

How to Check in Seller Central

1. Verify current storage fees: Seller Central > Help > search for "FBA storage fees" to ensure you are aware of active rates by period.
2. Estimate Q4 storage fees: Reports > Fulfillment > Inventory > "Estimated FBA Fee per Unit" to find estimated monthly storage charges by SKU.
3. Prepare removals: go to Inventory > FBA Inventory > "Recommended Removals" for items with a very low chance of selling before December.
4. Evaluate in-stock status: Inventory > Shipping Queue to estimate shipment arrival prior to Q4.

7. Returns Processing Fee

Amazon charges a returns fee only if your return rate exceeds your category's benchmark. Below it, you pay nothing. Above it, you pay a per-unit fee on every excess return. Apparel and shoes are the exception; they're charged on every return regardless of your rate.

This fee is a direct penalty for poor listing quality. An incorrect image, incorrect sizing, or a description leads to higher returns, and once the threshold is crossed, every piece sold in that category will cost you. It can be overlooked when sales volume is low, but it will recur every month.

How to Fix It?

Pull return reports by ASIN monthly and identify which products are pushing your rate over the threshold. Fix the root cause, provide better images, ensure accurate dimensions, and provide clear size guides. For apparel and shoes, treat the fee as a fixed per-unit cost from day one so it never catches you off guard.

How to Check in Seller Central

1. Go to Reports > Fulfillment > Customer Concessions > "Returns" report.
2. Download by ASIN to identify which products have the highest return rates.
3. Cross-reference your category threshold: Seller Central Help > search "2026 Returns Processing Fee" to find the threshold table for your category.
4. Check fee charges: Reports > Payments > Transaction View, filter by "Returns Processing Fee."
5. For Apparel/Shoes: the charge appears on every return regardless of rate, model it as a per-unit cost.

8. FBA Fee Tier Crossover ($50 Cliff)

Amazon's fulfillment fees change based on your product's price, not just its size or weight. Standard-size products priced between $10 and $50 will see fulfillment fees increase by $0.08 per unit on average. Prices above $50 will see fulfillment fees increase by $0.31 per unit on average. There's a real cliff at the $50 mark; a product priced at $50.01 can carry a meaningfully higher fee than one at $49.99, despite the two-cent difference.

Most sellers set prices based on competition or gut feel, without checking where Amazon's fee tiers actually kick in. This becomes especially costly during promotions. If your list price sits above $50 but you discount below it, some fee structures still calculate the charge on the original list price, not the discounted one.

How to Fix It?

Before setting or changing any list price, run the numbers on both sides of the $50 boundary using the FBA Revenue Calculator. The margin difference between $49.99 and $50.50 is not always obvious and can go either way.

Make this a standard check in your pricing and promotional planning; it takes two minutes and can save you from quietly paying more in fees than you're earning in extra revenue.

How to Check in Seller Central

1. Use the Revenue Calculator: search "FBA Revenue Calculator" in Seller Central Help to open the tool.
2. Enter your ASIN and test prices on both sides of the $50 threshold to see how fees change.
3. For your full catalog: Reports > Fulfillment > Fee Preview > download the "Fee Economics Preview" report and sort by fee tier.
4. Check current tier cards: Seller Central Help > search "FBA fulfillment fee rates" to view the full 2026 rate table with breakpoints.

9. Brand Registry / Stickerless Eligibility

Brand Registry lets you use the manufacturer's own barcode on shipments instead of printing and applying Amazon's FNSKU labels on every single unit. As of March 31, 2026, this is no longer optional for resellers: if your brand isn't registered, Amazon won't accept manufacturer barcodes, and every unit must be individually FNSKU-labeled.

How to Fix It?

Check Brand Registry status for every brand in your catalog before your next shipment, not just at the account level but brand by brand. If enrollment has lapsed or was never completed, start the reapplication process immediately, since it can take 2 to 4 weeks to get approved. Miss this deadline, and you're stuck paying to individually label every unit, a cost that adds up fast across a full shipment.

How to Check in Seller Central

1. Go to Brands > Brand Registry in the top navigation.
2. Check enrollment status for each brand. Active enrollment shows a green status badge.
3. If unenrolled: click "Enroll a Brand" and follow the application steps (requires a trademark registration number).
4. Checking whether ASINs are eligible for barcodes: Inventory > Manage Inventory > click on SKU > click on "Edit" > look at the "Product ID" field to see whether the manufacturer barcode or FNSKU is needed.
5. For stickerless commingling eligibility: search "stickerless commingling" in Seller Central Help to confirm category-specific rules.

10. SIPP Packaging Program Enrollment

SIPP certifies that your existing product packaging is strong enough to ship directly to customers without Amazon adding an outer box. Standard-size products get a lower fulfillment fee when certified. For small and large bulky products, unenrolled sellers now pay an extra $2.07 per unit on average, a 2026 change that made enrollment far more urgent.

There's no automatic enrollment; you have to apply. So most eligible sellers are quietly paying a higher fulfillment fee, or the full $2.07 per unit surcharge, because no one submitted the application.

How to Fix It?

Start with your small and large bulky SKUs, where the fee hits hardest. Check if your packaging meets SIPP's drop-test and labeling standards, then submit for certification through Seller Central. Any minor packaging adjustments needed are almost always recovered within a few months of fee savings.

How to Check in Seller Central

1. Go to Inventory > FBA Inventory.
2. Look for a "SIPP Eligible" or "Packaging" column; if not visible, use the column selector to add it.
3. Alternatively, search "Ships in Product Packaging" in Seller Central Help to access the enrollment portal.
4. Submit your certification request using the SIPP certification process flow, which explains all the packaging testing requirements.
5. Post-enrollment, the fee reduction will automatically be reflected in certified units. Confirm from Reports > Payments > Transaction View by comparing the fulfillment fees prior to and post-certification.

11. New Selection Program Waivers

The new selection program offers fee exemptions for products being offered on Amazon for the first time. Benefits include inbound placement fee waivers and free storage for a limited window after launch, but only for new parent ASINs that are enrolled within the eligible timeframe.

The waiver window is time-limited and cannot be applied retroactively. Sellers who skip this check before launch pay full fees from day one and lose the waiver for good, even though they would have qualified.

How to Fix It?

Add a New Selection Program eligibility check to your product launch checklist as a non-negotiable step, completed before the first shipment is created. The enrollment window opens at the point of the first shipment, so checking after inventory is already on its way means the opportunity is already gone.

How to Check in Seller Central

1. Go to Growth > New Seller Incentives, or search "FBA New Selection Program" in Seller Central Help.
2. Check current enrollment windows and eligible ASIN criteria (program terms update periodically).
3. For a new ASIN: During the "Send to Amazon" workflow, the system will prompt for new selection enrollment if the ASIN qualifies.
4. Verify eligibility: Seller Central > Programs > FBA New Selection will indicate which ASINs you currently have that are eligible or participating.
5. Waiver Savings: Reports > Payments > Transaction View will show $0 for the period the waiver is eligible for.

12. Disposal Fee Timing Rule Change

From March 1, 2026, Amazon now charges disposal and removal fees at the time of processing rather than after the order is completed. Standard-size items under 0.5 lb will be charged a $0.84 removal fee per unit.

Sellers working off old assumptions can get caught off guard when fees land earlier than expected, throwing off their cash flow forecasts. Those who schedule bulk removals on a fixed annual cycle may also be unknowingly doing so during higher-cost windows when a simple schedule adjustment could save money.

How to Fix It?

Before scheduling any large batch of removals or disposals, check the current fee timing and rates in Seller Central rather than relying on last year's process. Avoid scheduling disposals during Q4 if the same removal can happen in the cheaper off-peak window. And if you have light items under 0.5 lb waiting to be cleared, the 2026 rate cut makes now a good time to act.

How to Check in Seller Central

1. Go to Inventory > FBA Inventory > select units to remove > click "Create Removal Order."
2. The system will display current removal and disposal fees per unit before order confirmation.
3. To review fee rates: Seller Central Help > search "FBA removal order fees" for the current rate card by size tier.
4. To check past removal charges: Reports > Payments > Transaction View, filter by "Removal" or "Disposal."
5. Schedule removals from the "Recommended Removals" report under Inventory > FBA Inventory for pre-calculated cost-benefit guidance.

13. Inbound Defect Fee Exposure

Amazon now charges a $0.32 per-unit inbound defect fee for small standard products weighing 16 oz or less when an inbound shipment fails on labeling, packaging, routing, or delivery requirements. The fees will be based on the product's size and weight.

A single non-compliant shipment can now generate hundreds of dollars in fees that were previously negligible. And since Amazon ended its own prep and labeling services, there's no fallback; compliance is entirely on you.

This fee hits harder in 2026 than it used to because Amazon discontinued its own FBA prep services on January 1, 2026; sellers and their 3PLs are now fully responsible for labeling, poly-bagging, and packaging compliance that Amazon previously handled as a paid add-on, so a step that used to have a safety net now has none.

How to Fix It?

Check your last three inbound shipment reports for any defect flags. Then add a simple pre-shipment checklist at your warehouse or 3PL covering barcodes, box contents, and correct fulfillment center routing. Catching an error before the shipment leaves costs almost nothing.

How to Check in Seller Central

1. Go to Inventory > Shipping Queue.
2. Select any completed shipment and click "Track Shipment" to see if any defect flags were raised.
3. For a full defect history: Reports > Fulfillment > Inventory > "Inbound Performance" report, which lists problem type, affected units, and fee amounts.
4. The Inbound Performance dashboard also shows your overall defect rate score, which Amazon uses to assess compliance risk.
5. To review fee charges: Reports > Payments > Transaction View, filter by "Inbound Defect Fee."

The next two fees don't cut directly into your margin; they squeeze your cash flow instead, which can be just as damaging.

14. Payment Timing (DD+7)

Amazon now pays out 7 days after the delivery date, rather than closer to the shipment date. For a seller doing $10,000 a day in sales, roughly $70,000 is tied up in pending payouts at any given time that would previously have been accessible sooner.

It doesn't directly cut your profit, but it squeezes your working capital. Sellers who reorder inventory or fund ads using incoming payouts now have less cash available when they need it. If a reorder is postponed due to a payout delay, the resulting stockout may incur a low-inventory-level fee.

How to Fix It?

Amend the cash flow model to use the DD+7-day schedule rather than the old one. If your reorder schedule runs tight, build in a larger working-capital buffer or consider a short-term credit facility to bridge the gap for fast-moving SKUs. Don't let a timing shift quietly cause a stockout that costs more than the delay itself.

How to Check in Seller Central

1. Go to Reports > Payments > "All Statements" to view the settlement cycle and disbursement dates.
2. The disbursement date is shown as "Date of Transfer" on each settlement statement; confirm it is now 7 days post-delivery rather than post-shipment.
3. For forward planning: Reports > Payments > "Payment Dashboard" to see projected disbursement amounts and dates based on current open orders.
4. Cross-reference against your reorder timeline: if DD+7 means the payout lands after your supplier's payment due date, plan funding accordingly.

15. Ad Payment Method Change

Amazon is removing credit card billing as the default payment method for Sponsored Products, Sponsored Brands, and Sponsored Display ad spend for a subset of advertisers still paying by card. Ad costs will now be deducted directly from your seller proceeds; a card can stay on file only as a backup if your balance is insufficient.

This doesn't raise your ad costs directly, but it quietly costs you in two ways most sellers won't notice on their P&L: lost credit card rewards and lost payment float, since card billing used to let you delay paying for ads by up to 30 days while Amazon separately held your proceeds for 14 to 30 days.

Removing the card removes that buffer, squeezing cash flow right as the fuel surcharge and DD+7 payout delay are doing the same thing. However, as of now, the effective date is scheduled for August 1, 2026, giving some advertisers more time to prepare.

How to Fix It?

Check your Ads Console before the deadline and actively select Pay by Invoice if it better suits your cash flow than the default proceeds deduction. Don't wait to be auto-migrated. If you rely on card float to smooth ad spend against slower payout cycles, build that gap into your working capital buffer now rather than after the switch.

How to Check in Seller Central

• Go to Ads Console > Billing > Payment settings to see if your account is flagged for this change and to select your preferred payment method.
• Watch for a direct notification or billing banner in Campaign Manager, since Amazon has not made this a broad public announcement.

16. Referral Fee Category & Structure Leakage

For all products, Amazon deducts the applicable referral fee percentage from the item price before calculating your payout, with most categories at 15% and some at 8% (e.g., grocery under $15) or 45% (e.g., Amazon device accessories). That stability is exactly why it's the least-audited fee on this list.

Three things quietly push your effective rate above the published number: a $0.30 minimum fee (hits hard on items under $4 to $5), calculation on item price + shipping + gift wrap rather than item price alone, and charging the full pre-discount price even when you run a coupon.

How to Fix It?

Quarterly, confirm your top ASINs sit in the lowest legitimate category, build shipping/gift wrap into your fee math, and factor the undiscounted rate into promo planning; a 20% coupon can push an effective 15% rate to nearly 19%.

How to Check in Seller Central

1. Seller Central Help > search "Referral fees" for the current category rate table.
2. Inventory > Manage Inventory > SKU > Category to check classification.
3. Reports > Payments > Transaction View, filter "Referral Fee," to see what you're actually charged.

Putting It All Together

None of these sixteen fees will destroy your business on its own, and that's exactly what makes them dangerous. They don't arrive as one big warning. They creep in as small, easy-to-ignore deductions that quietly stack up until the gap between what your dashboard shows and what actually hits your bank account becomes a number you can no longer explain.

Amazon's 2026 fee structure rewards sellers who stay on top of their inventory, ship correctly, and regularly revisit their cost assumptions and quietly penalizes those who don't. Every fee on this list can be avoided or reduced. The data you need is already in Seller Central, free and regularly updated. The only reason most sellers miss it is that nobody has made checking it a habit.

The sellers who protect their margins best aren't always the biggest or the most sophisticated; they're simply the ones who treat a monthly fee audit as a fixed, non-negotiable part of running the business.

You don't need to fix all sixteen of these at once. Start with the two or three that apply most to your catalog; aged inventory and low-stock fees are usually the fastest wins, and build the rest into a monthly habit from there.

If you'd rather have a second set of eyes run this audit for you, that's exactly the kind of work we do at Conversion Perk. We'll go through your Seller Central account, flag which of these fees are actually costing you money, and hand you a prioritized list of fixes, with no obligation to work with us afterward.

Frequently Asked Questions

How can I avoid the aged inventory surcharge?

To avoid the aged inventory surcharge, regularly check the FBA inventory tool. It will show you which ASINs are already incurring the surcharge or are on track to within the next 60 days, so you can take action before it's applied.

How do I avoid the low-inventory-level fee?

Watch stock levels for each size or color separately, not just the product overall. Even if your listing looks well-stocked, one low variant can quietly get charged on every sale. Set a restock alert before you hit the threshold, not after, so you have time to react. Checking this monthly is usually enough to stay ahead of it.

What is the Amazon fuel surcharge, and does it apply to me?

It's an extra 3.5% Amazon adds to fulfillment fees, starting April 17, 2026. It applies to almost all FBA sellers and is based on your fulfillment fee, not your product's price. It's small on any single unit, but it adds up fast across your full monthly volume. Make sure your profit calculations include it, since it's easy to overlook.

Why did my storage fees go up even though my inventory isn't old?

You're likely holding more stock than you're selling, not stock that's been sitting too long. This is a separate fee from the aged inventory charge, and both can apply at once. It usually happens when you order more than your sales pace can support. Slowing down your restocking can bring this back under control.

Why are storage fees so much higher in Q4?

Amazon charges more for any stock stored from October through December, no matter how long it's been there. This catches sellers who bring in holiday inventory too early, before demand actually picks up. The fix is timing your shipments closer to when you expect to sell. Sending stock in smaller batches through the season also helps.

What is SIPP, and is it worth applying for?

SIPP lets you ship in your own packaging instead of an extra Amazon box. If you're not enrolled, bulky items can cost up to $2.07 more per unit, so applying usually pays off fast. The approval process just checks that your packaging can survive shipping on its own. Most sellers recover the cost of any packaging changes within a few months.

How long after delivery does Amazon pay sellers?

7 days after delivery, not after you ship the order. It won't cost you extra, but it means your money sits longer before you get paid. This matters most if you rely on that payout to reorder stock or fund ads. Planning your cash flow around this timing helps avoid surprises.

Do referral fees include shipping charges?

Yes. Amazon charges the fee on the combined item price plus shipping and gift-wrap, not just the item price. Sellers who only calculate the fee on their item price usually end up underestimating it. This is a small gap per order, but it shows up on every single sale.

What's the single biggest mistake sellers make with these fees?

Running last year's margin model. Many of these charges are new or restructured in 2026, so old cost assumptions will understate what you're actually paying. A quarterly refresh of your fee assumptions is usually enough to catch the gap before it eats into your margin.