Amazon puts your box in another box, and charges you for it. There is a programme that stops this.

Key takeaways

• Ships in Product Packaging lets qualifying items ship in their own box with no Amazon over-box, removing a packaging cost from every unit.
• Reporting states that average base fees for bulky items actually decreased in 2026 — but only for sellers enrolled in SIPP. Outside the programme, the decrease does not reach you.
• Packaging must pass ISTA-6 durability testing. This is a real standard with a real testing cost, not a checkbox.
• One published estimate puts the saving above $180,000 a year for a seller moving more than 10,000 bulky units a month. Scale that down honestly for your own volume before acting.
• The old Large Bulky tier was split into Small Bulky and Large Bulky in 2026, so the tier your product sat in last year may not be the tier it sits in now.

Every FBA unit that is not shipped in its own packaging gets an Amazon box, Amazon void fill and Amazon labour. That is a service, and it is priced into the fulfilment fee.

For bulky goods, it is priced heavily — which is why the programme that removes it is one of the few levers on this site that reduces a fee rather than avoiding a penalty.

01What SIPP is

Ships in Product Packaging allows qualifying items to ship to the customer in their own retail or shipping packaging, with no additional Amazon over-box.

The requirement is that the packaging survives the journey. Reporting specifies ISTA-6 durability standards — an established transit-testing protocol, not an Amazon-invented checklist. Packaging is tested against defined drop, vibration and compression conditions.

That requirement is the whole gate. Products already shipping in sturdy retail packaging often pass. Products in thin printed cartons designed for a shelf, not a conveyor, generally do not.

02The 2026 detail most sellers missed

This is the part worth knowing even if you never enrol.

Reporting states that average base fees for bulky items decreased in 2026 — but only if you are enrolled in SIPP. A bulky seller reading that “bulky fees came down” and doing nothing did not receive a reduction.

At the same time, the old Large Bulky tier was split into Small Bulky and Large Bulky, described as a more precise structure letting Amazon charge differently for items that occupy volume without weighing much.

Two consequences:

Your tier may have moved without your product changing. If you sell bulky items and have not checked the tier since 2025, check it. A product at the bottom of the old Large Bulky range may now be Small Bulky, with different economics.

The published saving is conditional. Any 2026 article telling you bulky fulfilment got cheaper is describing the enrolled case.

03The arithmetic, done honestly

The headline figure in circulation is that enrolment can save over $180,000 annually for sellers moving more than 10,000 bulky units per month.

Scale that down before you get excited. At 10,000 units a month — 120,000 a year — $180,000 implies roughly $1.50 per unit. Run your own volume against a per-unit figure rather than against the headline:

Monthly bulky units	Annual units	Saving at $1.50/unit
500	6,000	$9,000
2,000	24,000	$36,000
10,000	120,000	$180,000

Illustrative, using the per-unit figure implied by the published estimate. Your actual saving depends on your size tier and the specific fee difference for your product, which the Fee Preview report will tell you.

Against that, the costs of enrolling:

• ISTA-6 testing, per packaging design
• Packaging redesign if the current design fails
• Higher unit packaging cost if you move to sturdier material
• Time

The break-even is straightforward: total enrolment cost divided by per-unit saving gives the units you need to ship to recover it. For most sellers with a genuinely bulky, steady SKU, that number is smaller than they expect. For a seller with twenty low-volume bulky SKUs each needing its own testing, it is larger.

Test one SKU first. Pick your highest-volume bulky item, enrol it, measure the actual fee difference in the Fee Preview report for a month, then decide about the rest.

04What it does beyond the fee

Three second-order effects, two good.

Less packaging material. A genuine cost reduction and a genuine waste reduction, which matters if you are selling into markets with EPR obligations where you report packaging volumes by material and pay eco-contributions on them. SIPP reduces that reported volume.

Faster handling. Fewer steps at the fulfilment centre.

The customer sees your box. This cuts both ways. For a branded product with good packaging it is an improvement. For a plain white carton, or for anything where the contents are visible on the outside of the box, it is worth thinking about before enrolling. Some categories have obvious privacy considerations.

05Where it does not apply

SIPP is for products whose own packaging can survive transit. That excludes fragile items in retail-only packaging, anything in a bag rather than a box, multipacks assembled at the fulfilment centre, and products where the packaging is a display carton designed to look good on a shelf rather than survive a conveyor.

For those, the alternative lever is the one in our product research guide: reducing the packaged dimensions, which cuts the size tier, the fulfilment fee and every layer of the storage bill at once.

06What to do

Pull your bulky SKUs and check their current tier. The Small Bulky and Large Bulky split means last year’s assumption may be wrong.

Get the per-unit fee difference from Fee Preview, not from an article. That is the only number that describes your product.

Check whether your existing packaging might already pass. Some products ship from the factory in packaging that already meets transit standards, and enrolment costs only the testing.

Test one SKU, measure for a month, then scale. The published saving figure is a large seller’s number. Yours is a calculation, not a headline.

Check it on your own package. The dimensional weight calculator takes your packed dimensions and weight and returns billable weight and cubic feet — the two figures that drive freight and storage. Nothing is stored and nothing leaves your browser.

Frequently asked

What is SIPP?

Ships in Product Packaging — an Amazon programme allowing qualifying items to ship in their own packaging with no Amazon over-box, removing the packaging cost from the fulfilment fee.

What does the packaging have to pass?

Reporting specifies ISTA-6 durability standards, an established transit-testing protocol with defined drop, vibration and compression conditions.

How much does it save?

One published estimate puts it above $180,000 a year for sellers moving more than 10,000 bulky units a month, which implies roughly $1.50 per unit. Calculate against your own volume and your own Fee Preview figures.

Did bulky fees really go down in 2026?

Reporting states average base fees for bulky items decreased in 2026 for sellers enrolled in SIPP. Outside the programme, the decrease does not apply.

What changed with the bulky tiers?

The old Large Bulky tier was split into Small Bulky and Large Bulky in 2026. A product that sat in Large Bulky last year may now be in Small Bulky with different economics.

Is there a downside?

The customer receives your packaging rather than an Amazon box. For a branded product that is an improvement; for a plain carton, or where the contents are identifiable from the outside, it is worth considering before enrolling.

Sources

1. Amazon 2026 FBA fee changes: what sellers need to know (SIPP and ISTA-6; over $180,000 annual saving at 10,000+ bulky units per month; bulky base fees decreasing only with SIPP enrolment; Large Bulky split into Small Bulky and Large Bulky), eFulfillment Service accessed 2026-08-08
2. Amazon FBA fees 2026: full breakdown (SIPP eligibility alongside the 2026 fee structure; packaging optimisation to lower size tiers), AMZ Prep accessed 2026-08-08
3. Amazon fee changes 2026: significant fee updates (targeted updates for standard-size, bulky, apparel and dangerous goods items), Seller Snap accessed 2026-08-08
4. Amazon FBA fees in 2026: what sellers need to check before pricing products (packaged unit dimensions determining the size tier), Demotix accessed 2026-08-08