Amazon FBA Prep

Send us your inventory. We label, bag and pack it for Amazon, then ship the cartons to the fulfillment center.

For Amazon sellers

Skip the Prep Work

Preparing inventory for Amazon FBA is repetitive and unforgiving. Every unit needs the right label, the right bag and the right carton, and a mistake can mean delays at the fulfillment center.

Sonic Fulfillment is a third-party logistics (3PL) warehouse in Southern California. You ship your inventory to us, we prep it unit by unit, build the cartons and send them to Amazon.

Because your stock sits in our warehouse before it goes to Amazon, you can also keep part of it here for your other channels, such as Shopify, eBay, TikTok Shop or Whatnot.

Barcoded carton with a label stamp, clipboard and packing tape
What we handle

What We Handle

Receiving and counting

We unload, count and inspect your shipment, and flag any discrepancies to you.

FNSKU labeling

Each unit gets the right FNSKU label so Amazon can match it to your listing.

Poly bagging

Items that need bagging are bagged and sealed before they are packed.

Kitting and bundling

Multi-packs, bundles and kits are assembled to your instructions.

Carton labels

Cartons are labeled for the Amazon fulfillment center they are headed to.

Shipment to Amazon

Prepared cartons are shipped to Amazon fulfillment centers.

How it works

From Prep to Amazon

Send your stock once and we handle prep through shipment.

  1. 01

    Share your list

    Tell us what you sell, how many units you plan to send and what prep each product needs.

  2. 02

    Send inventory

    Ship cartons or pallets to our Southern California warehouse. We count and check every unit in.

  3. 03

    Prep and pack

    We label, bag, bundle and pack each unit and build the cartons for Amazon.

  4. 04

    Ship to Amazon

    Cartons go out to the Amazon fulfillment center, and you see stock and status in your dashboard.

Common questions

FBA Prep Questions

What Amazon sellers ask before sending us inventory.

What does FBA prep include?

It depends on the product. Typical prep is FNSKU labeling, poly bagging, bundling and carton labels. Tell us what you sell and we confirm what each item needs before it ships.

Can you ship my inventory to Amazon?

Yes. Once prep is done, we send the cartons to the Amazon fulfillment center.

Can I keep stock for my other stores too?

Yes. The same warehouse can hold stock for your other channels, such as Shopify, Amazon, eBay, TikTok Shop and Whatnot. See all services.

How is pricing set?

You get a quote built around your products and order volume. It lists the rate for receiving, storage, pick and pack, packaging and shipping, and your invoice uses the same lines.

Where are you located?

We are based in Southern California, close to Los Angeles, Orange County and the ports of Long Beach and Los Angeles. We send the receiving address for your inventory when you sign up.

Get started

Get a Fulfillment Quote

Tell us a little about your store and order volume. We'll send back pricing built for your products, with every fee listed.

Get a quote