Amazon FBA Shipping Prices: Own Carrier or Not

Every Amazon FBA parcel you buy the label for

1. The order lands

   An Amazon FBA sale gives you a destination and an item to pack.

2. Weigh what you packed

   Packaging counts toward the weight, and on a light parcel a few ounces moves the tier.

3. Rate-shop USPS and UPS

   Quote both carriers on that exact weight and destination, with the full price shown before you buy.

4. Send the tracking back

   Print the label, drop off, and put the tracking number back into Amazon FBA.

How Amazon FBA Prices Shipping, and What It Leaves Out

FBA inbound is its own workflow, separate from selling. You create the shipment in the Send to Amazon workflow in Seller Central, which guides you through preparing, packing and labeling the inventory. Amazon's placement options can split one inbound plan across more than one shipment and destination, and you choose a transportation option for each shipment.

Amazon's Partnered Carrier program covers small parcel deliveries, less-than-truckload and full-truckload freight within the 48 contiguous states, with labels, payment and tracking handled in Seller Central.

You are not limited to it: Amazon's documentation describes a use-your-own-carrier option for both small parcel and pallet shipments, requires it for shipments outside the contiguous United States, and says you must update the tracking IDs for all of the boxes in the plan. Two limits apply either way.

Amazon announced a maximum FBA box of 36 x 25 x 25 inches and 50 lb for US shipments from June 20, 2025. And carriers bill the greater of actual weight and dimensional weight, so an under-filled box costs more than it weighs. I'd Ship That rate-shops USPS and UPS side by side for an own-carrier carton and shows the full price with every fee before you buy.

Why an Amazon FBA Label Costs More Than Expected

Service picks

Which Service an Amazon FBA Order Should Use

Run by Amazon FBA

• Amazon Partnered Carrier (small parcel), Quoted in Seller Central. Cartons shipped within the 48 contiguous states; Amazon says shipping costs through the program are up to 25% lower compared to alternatives, with labels and tracking handled in Seller Central.
• Partnered LTL / freight, Quoted in Seller Central. Palletized shipments; Amazon's program covers less-than-truckload and full-truckload freight as well as small parcel, quoted as freight.

One Amazon FBA seller, two ways a parcel gets its label

Label from Amazon FBA

Through Amazon

Amazon's partnered carrier moves inbound cartons to the fulfillment center, bought in Seller Central. You pack, label and hand over the cartons.

Your levers on a partnered shipment: carton weight, carton size and how you split cartons.

• Amazon Partnered Carrier (small parcel)
• Partnered LTL / freight

Label you buy

Everything else

Cartons you send to Amazon on your own carrier, orders you fulfill yourself and other channels: rate-shop USPS and UPS here.

• USPS Ground Advantage (self-ship)
• UPS® Ground (own carrier)

Service	Best For	Est. Cost	Speed
USPS Ground Advantage (self-ship)Top Pick	Light cartons under about 5 lb that you send on your own carrier; USPS applies dimensional weight only above 1 cubic foot, so a small box under that size is billed at actual weight. Check in Send to Amazon that the carrier can be selected for the shipment	$5.27-7.14 Pro price	2-5 days
Amazon Partnered Carrier (small parcel)	Cartons shipped within the 48 contiguous states; Amazon says shipping costs through the program are up to 25% lower compared to alternatives, with labels and tracking handled in Seller Central	Quoted in Seller Central	Set by the partner carrier
UPS Ground (own carrier)	Heavier cartons on an own-carrier shipment, and shipments from outside the contiguous United States where the partnered program is not available	Quoted live	1-5 days
Partnered LTL / freight	Palletized shipments; Amazon's program covers less-than-truckload and full-truckload freight as well as small parcel, quoted as freight	Quoted in Seller Central	Scheduled with the carrier

Where the weight tier decides the price

Amazon's stated maximum FBA box for US shipments is 36 x 25 x 25 inches and 50 lb, so an overpacked carton has to be split before it ships.

Buying an Amazon FBA Label in About 30 Seconds

After you create the shipment in Send to Amazon, decide per shipment, not as a blanket policy. Weigh and measure each carton for real and look at the partnered-carrier quote Amazon shows for it. If you are sending a carton on your own carrier, enter the fulfillment center address and the carton's true weight and dimensions in I'd Ship That, compare USPS and UPS, and buy the label with the full price shown first.

Before you commit, check the carton against Amazon's stated maximum of 36 x 25 x 25 inches and 50 lb. Print in about 30 seconds, attach the carrier label alongside Amazon's shipment labels (kept clearly separate), and enter the tracking ID for every box in Seller Central, which Amazon requires on an own-carrier shipment.

When a plan splits across several shipments, The Workbench (Pro) bulk-imports every carton, rate-shops each one, and batch-prints the labels in one pass while Ship Intelligence auto-picks the cheapest valid rate. Pallet (LTL) shipments are quoted as freight separately.

Seller habits

What Experienced Amazon FBA Sellers Do Differently

• Decide per shipment with a quote in hand. Amazon says partnered-carrier costs are up to 25% lower compared to alternatives; treat that as Amazon's claim and look at the number it shows for your carton.
• Fill the void before you weigh. UPS bills the greater of actual and dimensional weight (length x width x height / 139), so a 20x16x12 box (3,840 cubic inches) is billed at 28 lb even if it weighs 15. A tighter box lowers the billed weight.
• On a bulky-but-light carton, watch the 1-cubic-foot line: USPS applies dimensional weight only above 1 cubic foot (1,728 cubic inches), so a small box under that size stays billed at its actual weight while UPS dim-weights it anyway. Above 1 cubic foot both divide by 139 (USPS now uses the same divisor as UPS), so the same 20x16x12 box bills at 28 lb on either carrier.
• Keep cartons inside Amazon's stated maximum of 36 x 25 x 25 inches and 50 lb. Splitting one 52 lb box into two 26 lb boxes costs a second label and keeps both inside the limit.
• On an own-carrier shipment, enter a tracking ID for every box. Amazon's documentation says you must update the tracking IDs for all of the boxes in the inbound plan.
• Use The Workbench (Pro) to bulk-import a split shipment and batch-print every carton label in one pass, and let Ship Intelligence pick the cheapest valid rate per carton.

Amazon FBA Shipping: Key Takeaways

• FBA inbound is a distinct cost center from selling, and it is the leg where you choose the carrier.
• Amazon sells partnered-carrier labels for small parcel and freight and says costs through the program are up to 25% lower compared to alternatives; the price for a carton is the quote Seller Central shows.
• Your own carrier is allowed, and required outside the contiguous United States. Amazon then needs a tracking ID for every box.
• Amazon's stated maximum FBA box for US shipments is 36 x 25 x 25 inches and 50 lb, so split an overpacked carton before it ships.
• Carriers bill dimensional weight, so an under-filled box can be billed at nearly double its actual weight; fill the void or size the box down.

Does FBA Inbound Have to Use Amazon's Partnered Carrier?

No. Amazon offers partnered-carrier labels for small parcel deliveries and for less-than-truckload and full-truckload freight inside the Send to Amazon workflow, and its developer documentation describes a separate use-your-own-carrier option for both small parcel and pallet shipments. On that option you must update the tracking IDs for all of the boxes in the inbound plan and confirm a delivery window for each shipment.

There is one case where the choice is made for you. Amazon says partnered-carrier shipments are available only in the contiguous United States, and that shipments outside this region must use your own carrier. Inside it, Amazon's own figure is that costs through the program are up to 25% lower compared to alternatives. I'd Ship That prints discounted USPS and UPS labels with every fee shown before purchase, for the cartons a seller sends on their own carrier.

• Amazon's partnered-carrier labels are offered in Seller Central for small parcel and freight; Amazon names no single carrier.
• An own-carrier FBA shipment needs a tracking ID for every box and a confirmed delivery window.
• Outside the contiguous United States, Amazon says you must use your own carrier.

Price an FBA Carton With a Quote, Not a Rule of Thumb

Amazon publishes no rate table for its Partnered Carrier program. It states that costs through the program are up to 25% lower compared to alternatives, from Amazon internal data, and it shows the price for a specific shipment inside Seller Central. That means there is no honest weight threshold to memorize: the number for your carton is the one on the screen.

What you control is the input. Both routes price on the real packed weight and the real box dimensions, and a guess invites a carrier adjustment. Weigh and measure every carton after it is sealed, enter those figures the same way wherever you ask for a price, and re-quote own-carrier labels after a carrier price change: USPS raised Ground Advantage 7.8% and Priority Mail 6.6% on January 18, 2026. Ship Intelligence (Pro) picks the cheapest valid USPS or UPS rate per carton automatically on the own-carrier side.

• Weigh and measure every carton after sealing; the carrier bills on real weight and dimensions.
• Read the partnered-carrier quote Amazon shows for the shipment instead of assuming a figure.
• For an own-carrier carton, rate-shop USPS and UPS on the same weight and dimensions.
• When a plan splits into several shipments, choose the transportation option for each one.

Clear Amazon's FBA Box Limits and the Carrier's Dimensional Weight

Two mechanics quietly inflate inbound cost, and both are fixable before you print. First, dimensional weight. Carriers bill the greater of actual and dimensional weight, and UPS uses a 139 divisor applied to every package, so a 20x16x12 box (3,840 cubic inches) is billed at 28 lb regardless of whether it scales at 15.

Fill the void or drop to a box that fits the contents and the billed weight falls. USPS now uses that same 139 divisor, but it applies dimensional weight only above 1 cubic foot (1,728 cubic inches): a small bulky box under 1 cubic foot ships at actual weight on USPS while UPS dim-weights it anyway.

UPS, divisor 139, applied to every package

Inbound carton, 20 × 16 × 12

On the scale15 lb

Billed28 lb

20 × 16 × 12 in = 3,840 cu in, ÷ 139 = 27.63, rounded up to 28 lb.

Second, Amazon's box limits. Amazon announced that from June 20, 2025 the maximum box length for FBA shipments in the US rose from 25 to 36 inches, which puts the maximum box at 36 x 25 x 25 inches and 50 lb. The expensive mistake is packing to 52 lb to save a box.

Splitting one 52 lb carton into two 26 lb cartons costs a second label and a little tape and keeps both inside the limit. The Send to Amazon workflow guides you through packing the shipment in front of you, so confirm the current limits there. When a plan splits into several shipments, bulk-import the own-carrier cartons into The Workbench, rate-shop each one, and batch-print the labels in one pass.

• Compute UPS dimensional weight (L x W x H / 139) before buying; fill the void or size the box down when it exceeds actual weight.
• For small bulky, light cartons, USPS Ground Advantage dim-weights only above 1 cubic foot (1,728 cubic inches); under that trigger it bills actual weight while UPS dim-weights every box.
• Keep every carton inside Amazon's stated 36 x 25 x 25 inches and 50 lb maximum; split a borderline box.
• Bulk-import own-carrier cartons into The Workbench, rate-shop each one, and batch-print the labels at once.

Common Mistakes Amazon FBA Sellers Make

Amazon FBA Seller Shipping Checklist

• Create the shipment in Send to Amazon and note every shipment and destination Amazon assigns.
• Weigh and measure each carton, and confirm it is within 36 x 25 x 25 inches and 50 lb before pricing.
• Read the partnered-carrier quote for each shipment; for own-carrier cartons, rate-shop USPS and UPS on the same weight and dimensions.
• Compute dimensional weight (L x W x H / 139 on UPS); fill the void or size the box down if it exceeds actual weight.
• On an own-carrier shipment, enter a tracking ID for every box and confirm the delivery window.
• Quote pallet (LTL) shipments as freight, separate from small-parcel boxes.

Amazon FBA Shipping: Questions Sellers Ask

Is this for shipping my products to customers?

No. With FBA, Amazon handles customer delivery for you. This guide covers the inbound leg, getting your inventory into Amazon's fulfillment centers. Amazon sells partnered-carrier labels for that leg in Seller Central and also allows your own carrier, in which case you must give Amazon a tracking ID for every box.

Is Amazon's partnered carrier rate always the cheapest?

Amazon's own statement is that shipping costs through its Partnered Carrier program are up to 25% lower compared to alternatives, a figure it attributes to Amazon internal data. Amazon names no single carrier and publishes no rate table for the program, so the price for a given carton is the quote Seller Central shows for it. The program is not required: Amazon's documentation describes a use-your-own-carrier option.

What are Amazon's box weight and size limits for inbound cartons?

Amazon announced that from June 20, 2025 the maximum box length for FBA shipments in the US rose from 25 to 36 inches, which makes the maximum box 36 x 25 x 25 inches and 50 lb. The Send to Amazon workflow guides you through preparing, packing and labeling each shipment, so confirm the current limits and any exceptions there before packing a borderline carton.

Why is my carrier bill higher than the carton's actual weight?

Carriers bill the greater of actual weight and dimensional weight. UPS divides length x width x height by 139, so a 20x16x12 carton at 3,840 cubic inches bills 28 lb even when it scales at 15. USPS applies dimensional weight only above one cubic foot and now uses the same 139 divisor, so a bulky-but-light carton under one cubic foot is billed at actual weight by USPS.

What about pallet (LTL) shipments?

Amazon's Partnered Carrier program covers less-than-truckload and full-truckload freight as well as small parcel deliveries, and its documentation also allows your own carrier for pallet shipments, with the carrier's freight bill number supplied to Amazon. Freight is quoted separately from small parcel, so keep parcel rate-shopping for your box shipments.

Is there a fee to sign up for I'd Ship That?

No. Creating an I'd Ship That account is free and an FBA seller pays per label bought, at rates below retail, with the full price shown before purchase. On the free Starter plan, each label adds a platform fee of about 10% of the postage, rounded to the nearest $0.25, at least $0.50 and at most $2.50. An optional paid Pro plan removes that fee and adds The Workbench for bulk import and batch printing plus Ship Intelligence for automatic rate selection, which help most when one plan splits into several shipments.