Every Amazon FBA wholesale seller reaches a point where they need to decide how their products will be prepared labelled and packed before entering the fulfilment centre. There are three main options — self-prep where you handle all labelling and packing yourself Amazon Prep where Amazon applies labels and performs prep at the warehouse for a per-unit fee and third-party prep centres where an independent service receives your stock from the supplier handles all prep work and ships directly to FBA. Each option has a different cost profile time requirement and quality control implication — and the right choice depends on your volume your available time your margin structure and the complexity of the prep your products require.

We are Brandhunterz Ltd — a UK registered wholesale sourcing company (Company No: 15342697) — and in this complete guide we compare all three prep options across every dimension that matters to wholesale FBA sellers — cost per unit time investment quality control scalability and the specific scenarios where each option makes the most commercial sense.

The Three Prep Options — What Each One Means

Before comparing the three options it is important to understand precisely what each one involves — because the word prep covers multiple distinct tasks that may or may not all apply to your specific products:

Prep Task	What It Involves	Required for All Products
FNSKU labelling	Applying the Amazon barcode label to every unit	✅ Yes — every unit
Poly bagging	Placing units in sealed transparent poly bags	⚠️ Specific products only
Bubble wrapping	Wrapping fragile units individually in bubble wrap	⚠️ Fragile products only
Expiry date labelling	Applying compliant expiry date stickers where needed	⚠️ Food and supplements only
Box packing and sealing	Packing units into shipping boxes with void fill and H-tape	✅ Yes — every shipment
Box labelling	Applying Amazon box labels and Team Lift labels where required	✅ Yes — every box

Option 1 — Self Prep — The Case For Doing It Yourself

Self-prep means you receive the stock from your supplier label every unit pack the boxes and book the courier yourself. It is the default choice for most wholesale sellers starting out and it remains the right choice for most sellers even as their business grows — particularly those selling standard retail-packaged products that require only FNSKU labelling and standard box packing.

✅ Advantages of Self Prep	❌ Disadvantages of Self Prep
Lowest cost per unit — no per-unit service fee	Takes your time — typically 2 to 4 minutes per unit for standard prep
Full quality control — you see every unit before it leaves	Requires space to receive store and process stock
Catch damaged or incorrect units before they reach Amazon	Becomes time-consuming at high unit volumes — over 500 units per week
Immediate awareness of any supplier errors or stock issues	Need to purchase labelling and packing supplies
Builds deep operational knowledge of your products	Not suitable if working full-time alongside the business initially

Self Prep Cost Per Unit — What It Actually Costs You

Cost Component	Estimated Cost Per Unit
FNSKU label — 30-up label sheet	£0.02 to £0.04
Proportional box cost per unit	£0.05 to £0.15
Tape and void fill per unit allocation	£0.03 to £0.08
Your time at estimated hourly rate — 2 mins per unit at £15/hr	£0.50
Total self prep cost per unit — including your time	£0.60 to £0.77

Option 2 — Amazon Prep — The Case For and Against

Amazon Prep means you send unlabelled products directly to the fulfilment centre and pay Amazon to apply FNSKU labels and perform any required prep work on arrival. You select this option in Seller Central during shipment plan creation by choosing Amazon rather than Merchant for the labelling and prep steps. The per-unit fee varies by product type and prep requirement.

Amazon Prep Service	Approximate Fee Per Unit
FNSKU labelling only	£0.20 to £0.30 per unit
Poly bagging — including label	£0.50 to £0.80 per unit
Bubble wrapping — including label	£0.60 to £1.00 per unit
Taping — reboxing or additional packaging	£0.25 to £0.50 per unit

✅ When Amazon Prep Makes Sense	❌ When Amazon Prep Does Not Make Sense
You have extremely limited time and high margin products that can absorb the per-unit fee	Your product margin is under 40% — Amazon prep fees will significantly erode profitability
A one-off test order where self-prep is not worth setting up for very small quantities	You want quality control visibility — Amazon prep gives you no way to inspect units before receiving
Products that are genuinely very difficult to label at home — unusual shapes or fragile materials	High volume ongoing orders — Amazon prep fees become a significant monthly recurring cost

Option 3 — Third-Party Prep Centres — The Scalable Middle Ground

A third-party prep centre is an independent business that receives your wholesale stock directly from your supplier labels and preps every unit to Amazon’s requirements packs the shipping boxes and ships to the assigned FBA fulfilment centre on your behalf. You provide the FNSKU labels and any special instructions — the prep centre handles all physical work. This option sits between self-prep and Amazon Prep on both cost and convenience.

✅ Advantages of Prep Centres	❌ Disadvantages of Prep Centres
Frees your time completely — stock goes direct from supplier to prep centre to FBA	Higher cost than self-prep — typically £0.40 to £1.00 per unit depending on prep required
Scales with your volume — no home space or personal time required	Adds 3 to 7 days to your timeline — stock must be received and processed before shipping
Professional prep teams — faster throughput — better for complex prep requirements	Less quality control visibility — depends on prep centre standards and communication
Eliminates need for storage space at home or business premises	Monthly minimum fees at some centres — not cost-effective at very low volumes

Typical Prep Centre Fee Structure

Prep Centre Service	Typical Cost Per Unit
Receive and inspect stock	£0.10 to £0.20
FNSKU label applied	£0.10 to £0.20
Poly bagging	£0.15 to £0.30
Bubble wrapping	£0.20 to £0.40
Box packing and shipping to FBA	£0.10 to £0.20 plus courier cost
Typical total per unit — standard label and pack only	£0.40 to £0.70

Side-by-Side Cost Comparison — 100 Units Example

To illustrate the real financial difference between the three prep options here is a worked comparison for a standard wholesale order of 100 units of a Health and Beauty product requiring only FNSKU labelling and standard box packing — no poly bagging or bubble wrapping required:

Cost Component	Self Prep — 100 Units	Amazon Prep — 100 Units	Prep Centre — 100 Units
Labelling cost	£3.00	£25.00	£15.00
Boxes tape and void fill	£8.00	£0	£12.00
Your time — 200 minutes at £15/hr	£50.00	£0	£5.00
Inbound courier to FBA	£12.00	£0 included	£15.00
Total prep cost — 100 units	£73.00	£25.00	£47.00
Total cost per unit	£0.73	£0.25	£0.47

The Decision Framework — Which Prep Option to Choose

Your Situation	Recommended Prep Option
New seller — first shipment — under 100 units	Self Prep
Growing seller — 100 to 300 units per week — time available	Self Prep
Scaling seller — 300 or more units per week — time constrained	Prep Centre
High-margin products — very limited time — test order only	Amazon Prep or Prep Centre
Products requiring complex prep — poly bag bubble wrap set labels	Prep Centre
Tight margin — under 40% ROI — every penny of cost matters	Self Prep only
Supplier shipping direct from overseas — no UK base for self-prep	UK Prep Centre

Conclusion — Start With Self Prep and Transition When Volume Demands It

For the overwhelming majority of wholesale FBA sellers starting out self-prep is the right choice. It costs the least in cash terms gives you full quality control and builds the operational knowledge of exactly what your products require before they go to Amazon. As your volume grows past the point where self-prep is practical — typically above 300 units per week across multiple brands — a third-party prep centre becomes the natural and cost-effective next step. Amazon Prep serves a narrow use case of very high-margin products or very small one-off test orders and should not be your default approach for regular wholesale shipments.

Find your next wholesale brand through our Brands Directory. Research every product with Keepa. Confirm your margin with AMZScout. And choose the prep option that fits your current volume and margin structure using the decision framework in this guide.