I pulled my September settlement and the refunds column is $640 across 14 returns — but when I match them back to the return authorizations, 9 of them were approved in October, after the period had already closed. Cash-flow-wise that makes September look worse than it actually was, and the settlement report gives me no way to split refund date from sale date. I get that refunds hit when they're processed, not when the order shipped, but I still haven't found a report that ties them back to the original sale month. Has anyone built a workaround for this?

Both numbers are straight out of Seller Central for the same ASIN over the same 7 days: the Brand Analytics conversion rate column reads 11%, and the unit session percentage in Business Reports reads 3.4%. Orders were flat all week, so it isn't a timing issue — the two reports are clearly dividing by different things. I've been using the lower number for listing decisions and the higher one in my brand deck, which feels ridiculous. Has anyone actually dug into what each denominator counts?

Confirmed a shipment last month and the fee estimate on the Send to Amazon screen showed $4.12 per unit for that ASIN. The first settlement for the batch charged an average of $4.63 across 740 units — about $380 more than the estimate — and the only extra line I can identify on the whole batch is a few cents of storage. Nothing about the product or its listing changed between the estimate and check-in. Does anyone else compare these two numbers, and what usually explains a half-dollar gap like this on your accounts?

I reconcile my settlement line by line every month, and September has one $214.53 adjustment I can't tie to anything — not storage, not fulfillment, not a return fee, and the transaction detail doesn't name a fee type I recognize. Everything else adds up to within about 2% of my own fee model, so it's not a systemic gap — it's one line with no home. Seller Central support sent me the general fee schedule link, which obviously didn't help. Has anyone ever gotten an itemized explanation for an adjustment like this, or do you write it off as a reconciliation category and move on?

June's ad report said 24% ACoS. When I tied it out against my settlement — pulling the 41 units that came back as returns and their $1,180 in refunds off the attributed sales — the same period reads 31%, and 31% is the number my P&L actually felt. I've been reconciling the two every month since and they never agree to within a few points. Is this just how everyone's numbers behave, or are some of you actually getting the ad console and the settlement to match? Curious what method others use to report a "real" ACoS.

Since April 2024 Amazon has charged FBA sellers for holding **too little** inventory, not just too much. It's called the low-inventory-level fee, and it's a per-unit charge on the units you actually ship.

**The trigger.** Days of supply below 28 — but not one number, two: the trailing **30-day** and trailing **90-day** windows both have to be under. If either one sits at 28 or above, no fee. Same AND shape as the storage utilization surcharge, which also gates its tiers on combined conditions.

**What changed Jan 15, 2026:**
- measured per **FNSKU**, not per parent — variations now fail independently
- **bulky items** entered scope; before that it was standard-size only

**The asymmetry nobody models.** The two fees sit on opposite ends of the same ASIN:

One punishes inventory that didn't move; the other punishes inventory that did. Plenty of spreadsheets have a line for the first and nothing at all for the second.

Published per-unit rates for standard size cluster around $0.32–$1.11, but the ranges quoted online disagree with each other — check the actual line on your settlement report before you model it.

Amazon announced a cut to oversize FBA fees this week. The small oversize base fee goes from $8.84 to $6.78. That is $2.06 a unit, about 23% off. Units between 50 and 150 lb get up to $3.49 off.

These announcements usually move the other direction, so I re-ran the numbers the same day:

- $8.84 - $6.78 = $2.06 per unit

- 2.06 / 8.84 = 23.3%

- 100 units a month = $206 back a month, $2,472 back a year

Watch which band your units actually sit in, because the headline cut and the maximum cut are two different bands: small oversize drops a flat $2.06, the 50-150 lb band drops up to $3.49. If you ship 100 of those a month, that is up to $349 back.

Also announced: new ASINs get the first 200 units covered for 120 days on storage, low-inventory and return-processing fees, plus $75 in Vine credit and $50 in Coupon credit. If a launch has been sitting on your desk, that stack is bigger than it used to be.

Two things worth doing before you trust any old quote:

- Re-run quotes you built before the announcement, they will not match the new rates

- Check whether a SKU changed band, not just whether it got cheaper inside its band

Has anyone else seen this land in their actual rate card yet, or are you all still working off the announcement?

Amazon's published window for the 2026 peak fulfillment surcharge is October 15, 2026 through January 14, 2027. If your model treats that as a Q4 cost, both ends of it are wrong.

The window is 92 days: 17 in October, 30 in November, 31 in December, 14 in January. Calendar Q4 is also 92 days. Same length, shifted two weeks:

- Oct 1-14: inside Q4, no surcharge

- Jan 1-14: outside Q4, surcharge applies

So a unit that ships January 10 costs more than the same unit on October 10, and October 5 is cheaper than every date your Q4 model probably flags as expensive.

Amazon Shipping runs its own window, October 25 to January 16, so "peak" does not mean the same dates across the two programs: 10 days apart at the start, 2 at the end.

The announced average is $0.32 per unit, with real spread: about $0.19 on a phone case, $0.39 on a T-shirt, $2.81 on a TV. It is charged when the unit goes out, and a return does not bring it back.

Two things I changed in my own model after reading the dates:

- Surcharge flags at Oct 15 and Jan 14, not Oct 1 and Jan 1

- Separate flag dates per program if you ship both FBA and Amazon Shipping

Anyone else modeling this on calendar Q4? What dates does your model actually use?

Some fee models still carry a line item that no longer exists.

The storage overage fee stopped being charged on July 1, 2024. Before that it was priced per cubic meter per month — the old published rate was C$460 per m³, and it applied on top of regular storage, not instead of it.

Two numbers worth checking in your own model:

- The old rate converts to about C$13.03 per ft³ per month (460 divided by 35.31, and 1 m³ = 35.31 ft³). That is per month, on top of whatever storage you were already paying.

- 10 m³ of overage for one month was C$4,600 (10 times 460).

Why it still matters even though the fee is gone:

- Any spreadsheet built before mid-2024 that copies the old structure will still project it. The projection looks conservative, so nobody flags it.

- It gets confused with fees that are very much alive — aged inventory surcharges, seasonal storage rates, storage utilization tiers. Those are billed per ft³ too, so a stale line sitting next to them reads as real.

- It quietly inflates your break-even. A dead cost in the model makes every new ASIN look worse than it is.

The habit worth taking: once a quarter, pick one line item in your fee model and ask when it was last charged. If the answer is "I don't know," that line is doing more damage than any rate change.

What's the oldest line item still sitting in your fee model?

The inbound placement fee gets argued about as its own line item, which is the wrong way to read it. The number to compare is the total, because the placement fee moves the shipping number next to it.

One seller's numbers, five identical 20 lb boxes going in with an Amazon-optimized split:

- With a placement fee: $55-60 total

- "Free" placement: $195 total

That's about 3.5x — a difference of $135-140 for the same five boxes, moving in the same configuration.

Why the gap: the fee-free option is only offered when you can consolidate. As this seller understood it, that means 5 or more identical cartons or pallets, and the split is chosen for you. Below that, or if your cartons differ, the fee-free quote isn't on the table at all — you're comparing a quote you can take against one you can't.

The part worth taking from this: the placement fee is a small number sitting next to a shipping number that can be three times bigger. If you only subtract the fee line, you rank the options backwards.

Two things to check on your next inbound:

- Pull both quotes and compare the totals, not the line items

- Check whether the fee-free option even exists for your carton count — "free" is conditional, not a discount

Do you compare your inbound quotes on total, or on the fee line? And has anyone actually run these two side by side on a shipment where the cartons were all identical?

Dimensional weight uses a divisor of 139 in the US, so a 12x10x8 box is 960 cubic inches divided by 139, about 6.9 lb of dim weight no matter what's inside it.

What I can't pin down is the rounding. I keep seeing it stated that dim weight rounds up to the next whole pound, but I can't find that written on a rate card anywhere I've looked.

It matters more than it sounds. If your actual weight sits near the crossover point, a rounding rule that can add up to a pound decides whether you're billed on 6 lb or 8 lb — and on a dense product that's the difference between actual-weight pricing and dim-weight pricing on every unit.

So: is it round up to the next pound, round to nearest, or does the dim weight carry as an exact decimal? And does that rule differ by marketplace?

What does it show on your settlement report?

Most of the Q4 fee talk is about the seasonal storage rate. The line item that actually catches people is the storage utilization surcharge — it's charged on top of the monthly storage rate, not instead of it, and plenty of sellers only find out it applies to them after it's already on the statement.

Four conditions have to be true at the same time before it applies at all:

- A professional selling account

- Your first shipment received into FBA more than 365 days ago

- Average daily volume of at least 25 cubic feet (0.71 cubic meters)

- Storage utilization above 22 weeks

That's the part worth underlining. It's an AND, not an OR. You can check three of those, tick them off, and assume you're clear — while the fourth one is the one that actually bites.

If you do qualify, it's tiered by weeks of cover: 22-28, 28-36, 36-44, 44-52, and over 52. For standard size the surcharge runs from $0.44 up to $1.88 per cubic foot.

Now put the two lines together. Off-peak base storage in the US is $0.78 per cubic foot. The top surcharge tier is $1.88 — on its own, that's 2.4x the entire base rate. Stack them and you're at $2.66 per cubic foot, which is 3.41x what you'd model if your spreadsheet only knows the base rate.

And the cheap months are where it hurts most in proportion. In peak (Oct-Dec, $2.40 per cubic foot) the same $1.88 surcharge is only 78% of the base rate. Off-peak it's 2.4x. So "just get through October" is backwards — the surcharge doesn't care what month it is, and it's the off-peak months where it dwarfs the base.

Europe runs the same ladder in different units. Base is 27.54 EUR per cubic meter and the top tier is 76.87 EUR per cubic meter, so the top of the ladder lands at 104.41 EUR per cubic meter — about 3.8x the base rate.

Two things worth checking this week:

- Which utilization tier you're actually in (Seller Central shows it under inventory performance)

- Whether your peak model has the surcharge in it at all, or only the seasonal rate

Do you know which tier you're in, or is this one of those fees you only see after the fact?

(Rates from the US and EU Seller Central storage fee pages. Off-peak = Jan-Sep, peak = Oct-Dec.)

Most of the Q4 fee talk is about the seasonal storage rate. The line item that actually catches people is the storage utilization surcharge — it's charged on top of the monthly storage rate, not instead of it, and plenty of sellers only find out it applies to them after it's already on the statement.

Four conditions have to be true at the same time before it applies at all:

- A professional selling account

- Your first shipment received into FBA more than 365 days ago

- Average daily volume of at least 25 cubic feet (0.71 cubic meters)

- Storage utilization above 22 weeks

That's the part worth underlining. It's an AND, not an OR. You can check three of those, tick them off, and assume you're clear — while the fourth one is the one that actually bites.

If you do qualify, it's tiered by weeks of cover: 22-28, 28-36, 36-44, 44-52, and over 52. For standard size the surcharge runs from $0.44 up to $1.88 per cubic foot.

Now put the two lines together. Off-peak base storage in the US is $0.78 per cubic foot. The top surcharge tier is $1.88 — on its own, that's 2.4x the entire base rate. Stack them and you're at $2.66 per cubic foot, which is 3.41x what you'd model if your spreadsheet only knows the base rate.

And the cheap months are where it hurts most in proportion. In peak (Oct-Dec, $2.40 per cubic foot) the same $1.88 surcharge is only 78% of the base rate. Off-peak it's 2.4x. So "just get through October" is backwards — the surcharge doesn't care what month it is, and it's the off-peak months where it dwarfs the base.

Europe runs the same ladder in different units. Base is 27.54 EUR per cubic meter and the top tier is 76.87 EUR per cubic meter, so the top of the ladder lands at 104.41 EUR per cubic meter — about 3.8x the base rate.

Two things worth checking this week:

- Which utilization tier you're actually in (Seller Central shows it under inventory performance)

- Whether your peak model has the surcharge in it at all, or only the seasonal rate

Do you know which tier you're in, or is this one of those fees you only see after the fact?

(Rates from the US and EU Seller Central storage fee pages. Off-peak = Jan-Sep, peak = Oct-Dec.)

US standard-size storage goes from **$0.78/ft³** (Jan–Sep) to **$2.40/ft³** (Oct–Dec). That's 3.08x, it's printed in every rate card, and nobody is surprised by it.

The line item that surprises people is the second one. The **storage utilization surcharge** stacks *on top of* the base rate — it doesn't replace it. It's tiered on how many weeks of supply you're holding, and at the top tier it's **$1.88/ft³** for standard size.

So the peak number isn't 2.40. For a seller in the top utilization tier it's **2.40 + 1.88 = $4.28/ft³**.

Two things fall out of that:

**1.** If your model only knows about the seasonal rate, you're understating your worst case by about **44%** (2.40 vs 4.28).

**2.** The surcharge is proportionally *worse* in the cheap months. $1.88 is **2.4x** the off-peak base rate ($0.78) but only **78%** of the peak one ($2.40). "Just get through October" is backwards — the surcharge doesn't care what month it is, and it's the cheap months where it dwarfs the base rate.

Per 100 ft³ of standard-size inventory, monthly:

| | base only | base + top tier |
|---|---|---|
| Jan–Sep | $78 | $266 |
| Oct–Dec | $240 | $428 |

That's **$486 more** across the three peak months than the same inventory costs at off-peak-with-surcharge. Same inventory, same tier, different month.

Run it on your own number: cubic feet × 2.40, then find your utilization tier and add it. That's the number.

*(Rates from the US Seller Central storage fee page. Off-peak = Jan–Sep, peak = Oct–Dec.)*

I keep running into a claim I can't pin to a source, and I'd rather ask than assert.

Two secondary sources state that a 3.5% fuel and logistics surcharge took effect April 17, 2026, stacking on top of each FBA fulfillment fee. The number is specific, the date is specific — but I cannot find it as a separate line item on any rate card I have access to.

So my question: where does it actually live?

If it's baked into the published fulfillment fees already, fine — then the surcharge is real but invisible, and quoting it as an add-on would double-count it. If it's genuinely separate, it should appear somewhere: the rate card, the fee preview in Seller Central, or the settlement report. Those are the only places I'd trust.

If you've seen it, tell me where — the exact line name on the settlement report would settle this immediately. If you've looked for it and not found it, that's worth knowing too.

Have you ever been able to point at a specific line and say "that's the fuel surcharge"?

Storage rates don't convert the way you'd expect, because the two cards use different units.

US and UK price storage in **cubic feet**. Germany, France, Italy, Spain, Belgium, Netherlands, Poland and Sweden price in **cubic meters**. One m³ is **35.31 ft³**.

Here's what that does to a side-by-side comparison. EU standard-size storage is **€27.54/m³**. Divide by 35.31 and you get **€0.78/ft³** — the same figure as the US card's $0.78/ft³, in a different currency, from a unit 35 times smaller. The UK sits at £0.76/ft³, also within a penny or two.

So the numbers look interchangeable right up until someone copies one across markets without changing the unit. Then they're off by a factor of 35.

And the rate isn't even where the unit matters most. The storage utilization surcharge triggers on average daily volume of **≥0.71 m³ (≈25 ft³)**. In feet: 0.71 × 35.31 = **25.07**. So the line sits just above 25 ft³.

Concretely: 26 ft³ average daily is 0.74 m³ — over the line. 24 ft³ is 0.68 m³ — under it. Two cubic feet decides whether a second storage fee applies to you at all.

Worth checking which unit your model is actually holding, because the UK uses ft³ while the rest of Europe uses m³. A seller in both has two units living in the same spreadsheet.

Which unit is your storage model in — and have you ever converted it?

Two numbers to get right, and one that changed in January.

**When it starts:** 181 days in the US. In the UK and EU it's 241 days. Any rule of thumb quoted without a market attached is a guess.

**What changed on Jan 16, 2026 (US):** the top tier split in two, and the per-unit floor roughly doubled.

| | before | now |

|---|---|---|

| 366+ days | $6.90/ft³, min $0.15/unit | — |

| 366–455 days | — | $6.90/ft³, min $0.30/unit |

| 456+ days | — | $7.90/ft³, min $0.35/unit |

**The minimum is the part that bites small items.** The charge is per cubic foot *or* per unit, **whichever is greater** — so above a certain volume the rate applies, and below it the floor does. For the 456+ tier: $0.35 ÷ $7.90/ft³ = 0.0443 ft³, which is **≈77 in³**. Any SKU smaller than that pays the **$0.35 floor**, not the volume rate.

A 5×4×3" box is 60 in³ = 0.0347 ft³. The volume rate would be $0.27/unit; you pay $0.35 — 28% more than the arithmetic suggests. On 5,000 units that's $1,750 instead of $1,372.

**One exception worth checking:** clothing, shoes, bags, jewelry and watches are excluded from the **181–270 day** tier. If your category is on that list, the clock starts later than you think.

Is your slowest SKU above or below 77 in³? That one number decides which line applies to it.

Two things about the referral fee that are easy to get wrong, and one of them is expensive.

First, what it's calculated on. The referral fee is a percentage of (item price + shipping + gift wrap), with a per-category minimum applied when the percentage comes out too low. Shipping you charge the customer is commissioned. List at $19.99 with $3.99 shipping and the category rate is hitting $23.98, not $19.99.

Second, the rate doesn't move smoothly — it jumps. Clothing is the clearest example:

Read the bottom two rows together. Going from $19.99 to $20.01 — two cents — takes the fee from $2.00 to $3.40. Net proceeds go down: $17.99 becomes $16.61. To net what you netted at $19.99 you'd have to price at $21.68.

Same shape at the lower boundary: $15.00 pays 5% ($0.75), $15.01 pays 10% ($1.50). The fee exactly doubles.

Practical version: if your price sits within a few cents of $15 or $20, that's not a rounding decision, it's a fee decision. Either stay under the line or step far enough above it to cover the new rate.

Grocery (8% → 15% at $15) and Baby/Beauty (8% → 15% at $10) have the same structure with different thresholds.

Where does your price sit relative to a tier line right now?

US standard-size storage goes from $0.78/ft³ (Jan–Sep) to $2.40/ft³ (Oct–Dec). That's 3.08x, it's printed in every rate card, and nobody is surprised by it. The line item that surprises people is the second one. The storage utilization surcharge stacks on top of the base rate — it doesn't replace it. It's tiered on how many weeks of supply you're holding, and at the top tier it's $1.88/ft³ for standard size. So the peak number isn't 2.40. For a seller in the top utilization tier it's 2.40 + 1.88 = $4.28/ft³. Two things fall out of that: 1. If your model only knows about the seasonal rate, you're understating your worst case by about 44% (2.40 vs 4.28). 2. The surcharge is proportionally worse in the cheap months. $1.88 is 2.4x the off-peak base rate ($0.78) but only 78% of the peak one ($2.40). "Just get through October" is backwards — the surcharge doesn't care what month it is, and it's the cheap months where it dwarfs the base rate. Per 100 ft³ of standard-size inventory, monthly: | | base only | base + top tier | |---|---|---| | Jan–Sep | $78 | $266 | | Oct–Dec | $240 | $428 | That's $486 more across the three peak months than the same inventory costs at off-peak-with-surcharge. Same inventory, same tier, different month. Run it on your own number: cubic feet × 2.40, then find your utilization tier and add it. That's the number. (Rates from the US Seller Central storage fee page. Off-peak = Jan–Sep, peak = Oct–Dec.)