FBA prep cost per unit: which steps pay for themselves, and which you can drop

Every unit you send to an Amazon fulfilment centre passes through your hands first. Someone labels it, bags it, wraps it if it is glass, and packs it into a carton that gets a label of its own. This is FBA prep.

Each step takes a few seconds and a few grams of material.

On one unit, nobody notices. On 10,000 units a month, it is a payroll line.

Here is the short answer. Keep every step Amazon.in requires for that product, because skipping it only moves the work to Amazon at a per-unit fee you do not control. Cost every other step in minutes and materials per unit. Keep it only if your own damage claims and returns show it prevents more than it costs.

We make tapes, films and protective packaging in Jaipur, and our materials go into exactly this kind of prep. So I have an interest in this sum. We have written it to help you whoever supplies your bags.

The Amazon rules below come from Amazon.in's own Seller Central help pages, which I read on 22 October 2026. We do not speak for Amazon, and those pages change, so check the current version before you act.

There is no price anywhere in this guide, neither Amazon's fees nor ours. You put in your own.

What are the prep steps, and what does each one cost?

Let us list them in the order they happen on a prep table. Each one costs minutes of someone's time, and most of them cost material too.

1. Unit labelling: print the FNSKU label (Amazon's own barcode for your listing), stick it flat and cover any other barcode.
2. Poly bagging: insert, seal, and add a suffocation warning if the bag has none printed.
3. Protection: bubble wrap, or an over box (a plain outer box).
4. Bundling and sets: bag or shrink-wrap the pieces together and add a set label.
5. Inspection: open, check and re-seal.
6. Carton packing: fill the shipping carton, tape it and add its box ID label.
7. Storage while waiting: prepped stock takes floor space and gets handled twice before it leaves.

The first four are product prep. The last three are the work around it.

All seven belong in your cost.

Which prep steps does Amazon.in require?

Amazon decides most of this for you, product by product. When you create a shipment, Seller Central shows prep guidance for each product. If none is shown, you choose a prep category, and each category comes with a prep type. Amazon.in's Packaging and Prep Requirements page gives a plain example: every item in the fragile category requires bubble wrap.

From that page and the pages under it, these are the requirements I would treat as fixed:

1. Every unit carries one scannable FNSKU label printed from your account, as the FBA product barcode requirements page says. Only books may go stickerless. Other scannable barcodes must be covered.
2. Each FNSKU is packed as a single package, such as a poly bag or a box.
3. Products sensitive to dust, dirt or humidity go in transparent poly bags.
4. Small items, with the longest side under 2-1/8 inches, go in a sealed transparent bag of at least 1.5 mil. The Small Items page says the bag should not stick out more than 3 inches past the product.
5. Bags with an opening of 5 inches or more need a suffocation warning.
6. Textiles go in a sealed poly bag or shrink wrap, with a stiff backing unless the item is rigid.
7. Fragile and sharp items need bubble wrap or a protective over box. The Prep Matrix linked from the requirements page adds a 3 foot drop test on a hard surface for fragile units.
8. Liquids without a double seal go in a sealed bag, or get some other second seal.
9. A set carries a "Sold as set" or "This is a set. Do not separate." label.
10. On expiry-dated products that need extra prep, such as glass jars, the date goes on the outside of the prep. The Expiration dates on FBA products page also asks for enough shelf life at check-in to use the product in full, plus 90 days.
11. Every carton needs its own FBA box ID label, never photocopied or reused.

The requirements page says one more thing worth reading twice. When an item is bought, it goes out in the packaging in which you sent it, and no additional packing is done.

So your prep is also the protection your customer receives.

Is a 38 micron FBA bag thick enough for India?

Film is what we make, so we think in microns. 1.5 mil is about 38 microns.

That is Amazon's minimum, not India's. The Plastic Waste Management Rules, 2016 set a minimum of 50 microns for plastic sheets, as the Press Information Bureau release of 18 March 2016 records. Whether your product bag counts as such a sheet is a question for your compliance advisor.

Until you have that answer, I would not buy FBA bags thinner than 50 microns for India. Our guide on downgauging covers these legal floors.

What happens if you skip a required step?

Amazon does it for you, at your cost.

Amazon.in's Unplanned FBA prep services page lists per-unit fees for missing labels, bagging, bubble wrap and taping done at receipt. The fee is higher once your coaching level moves up from Standard to Elevated or Critical. That happens when your problem rate stays above Amazon's permitted rate, which Amazon measures over four months.

There is a time cost too. The FBA Prep Service page says unplanned prep may delay complete receipt of your shipment by up to 48 hours.

Stock that has not been received cannot sell.

So, in our view, a required step is never really dropped. It only changes hands, at a rate you do not set.

The same page offers a planned version. You can choose Amazon as the one who preps an eligible product, for a published per-unit fee, and Amazon decides which prep it performs. This gives every required step a make-or-buy test, which we use in the calculation below.

How do you time a step that takes a few seconds?

Price the minutes before the material.

A mithai shop before Diwali rarely runs short of boxes. It runs short of hands to fold them. Prep is the same. A bag is a few grams of film, but the person sealing it is paid by the hour.

A stopwatch on one unit does not work for a 6-second task, because your own reaction time becomes a big part of the reading. We suggest timing a batch instead. It is how I would time any short, repeated task.

1. Take one product and one step, for example labelling.
2. Lay out 50 units and everything the step needs.
3. Start the watch on the first unit and stop it when the 50th is done.
4. Divide by 50. Repeat on another day and use the slower result.
5. Time each step separately, so you can see which one is slow.

Next, work out what one minute of that person costs you. Take their full monthly cost to you (salary plus your share of statutory contributions, where they apply) and divide it by the minutes they are paid for. This is your figure, and I will not guess it.

For materials, we would use the price per piece delivered to your door. For wrap and tape, measure the length used on 10 units and multiply the average by your price per metre.

People cut generously when nobody is measuring.

Add a rework share too. If 2 units in 100 have to be relabelled or re-bagged, add 2% to that step's time.

Your calculation

Here is the sheet we suggest, one row per product and one line per step. I picked the minutes below only to show the arithmetic. They are not a measurement from any seller or from our own plant, so replace every one with your own timing.

We kept this sheet in minutes, not money, on purpose. Our example is a 500 g glass jar of pickle. It is fragile and expiry-dated, so Amazon.in requires a label, protection and an expiry date on the outside of the wrap.

At 1.08 minutes a jar, 2,000 jars a month need 2,160 minutes. That is 36 hours of one person's month, for one product.

Now put in your own figures:

1. Labour per unit = total minutes per unit × your cost per minute.
2. Materials per unit = the material column, at your own prices.
3. Prep cost per unit = labour + materials + rework share.
4. Monthly prep cost = prep cost per unit × units sent in the month.

Then we run two tests.

The make-or-buy test is for required steps. Compare your cost per unit for a step with Amazon's planned fee for the same activity on the FBA Prep Service page, and count the slower receipt if you buy. Where your figure is higher, you have a step to buy or to fix.

The keep-or-drop test is for optional steps. Break-even = cost of the step per unit ÷ cost of one damaged or returned unit.

Say checking each jar costs you one two-hundredth of what one returned jar costs you. Then the check must stop at least 1 bad jar in every 200 to pay for itself. Our worksheet on what a damaged delivery really costs shows how to get that cost. For FBA, add any return-related charges from your own statements.

Check your claims and returns before you cut anything

This is where we think most cutting goes wrong. A step looks useless because nothing is going wrong. Very often, nothing is going wrong because of that step.

So read three months of your own records first, product by product. We would start with the returns, because they are the customer's verdict on your prep.

1. Customer returns. Seller Central gives a reason for each return. Mark the ones about condition: damaged, leaking, dirty, missing parts or the wrong item.
2. Units damaged inside a fulfilment centre. Amazon.in has separate reimbursement policies for these, so keep them in their own column.
3. Problems at receipt. Your inbound performance pages show the labelling and prep problems Amazon found when your stock arrived.

Then match each failure to the step meant to stop it. We have put the usual pairs in a table.

A step with no failures against it in three months is a candidate, nothing more.

It still has to pass two checks. It must not be required for that product, and you must have enough units to tell.

That second check catches many people.

Say your damage rate is 1%, which is 1 damage in every 100 units. A trial on 100 units can show no damage at all, or three, by chance alone. I would not judge a trial on fewer than a few hundred units. Run it without the step on part of your stock, leave the rest as it is, and compare the two groups once their returns have had time to come back.

I would rather you keep a step one month too long than drop it one month too early. Change one step at a time, or you will not know which one mattered. Our 10-point packaging specification review shows how to write a trial down so it survives a change of staff.

Where are the savings, step by step?

These are the verdicts we would give from the packaging side. Your own returns data overrules every one of them.

1. Unit labelling cannot be dropped, but it can be cheaper. The barcode page allows the FNSKU barcode to be printed directly on the unit, which removes the step for packs you print yourself. Leave no second scannable barcode showing, because Amazon treats that as a label defect.
2. For poly bagging, buy bags with the suffocation warning printed and, as the Prep Matrix asks where possible, a self-adhesive flap. That removes a sticker and a strip of tape from every unit. A bag sized to the product also needs no taping down.
3. Protection for fragile and sharp items does not always have to be wrap. Where the prep guidance for your product allows an over box, a snug one can be quicker. Time both on 50 units, drop-test both, and keep the cheaper one per unit.
4. If sets come from a factory, ask the factory to pack them as sets. Work done once at the source costs less than unpacking and repacking at your table.
5. Inspection is not one of Amazon's prep categories, so it is your choice. If your records show almost no defects, check a fixed sample, say 1 in 20, instead of every unit. Go back to every unit the day a defect turns up.
6. Carton cost per unit falls with every unit you fit in. Ship full cartons, one product per carton where you can.
7. Prep close to dispatch, not weeks ahead. For expiry-dated stock, waiting also eats the shelf life Amazon checks at receipt.

I should be honest about one thing we sell. We make paper wraps as well as plastic ones. Amazon.in's prep pages name poly bags, shrink wrap, bubble wrap and over boxes, and they say nothing about paper alternatives. I would not swap a paper wrap into an FBA unit on my own judgement, even ours. Ask Seller Support in writing first, and keep the reply.

I would start with the five products that send the most units. Time each step on 50 units this week and fill in one row for each. If you want a second view on the bag or the wrap, send us the product size and the prep guidance Seller Central shows for it through our contact page. We will tell you if what you use today is already right.

Which step on your prep table would you drop first, and what do your returns say about it?