What a Single-Dose Packaging Line Actually Costs to Run

The machine price is usually the most visible number in a packaging project and frequently the least important one over the life of the line. A machine that costs less but wastes film, runs slower on your material and takes forty minutes to change over will cost more per pack for most of its working life.

This article sets out where the money actually goes.

The six cost lines that decide cost per pack

1. Film

Film is usually the largest single variable cost. Three things drive it:

• Material structure — a simple PE/PP laminate costs materially less than a high-barrier PA structure
• Thickness — thinner film is cheaper per kilogram but may not run reliably on your machine
• Waste — the film consumed during changeover, start-up and faults

Waste is the part most people forget. On a line running short production runs, changeover film can exceed the film used for actual product. Measure your planned changeover frequency before you buy the machine, because it changes which machine is right.

2. Output actually achieved

Machine capacity is quoted as a maximum, usually at the fastest pack and the thinnest film. Your output depends on:

• The pack size you actually run
• The number of lanes configured
• The speed your specific film holds at the sealing jaw
• The number and length of stoppages per shift

Do the arithmetic on realistic output, not headline output. It is the single most common reason a line does not meet its business case.

3. Changeover time

Every changeover costs: film wasted, labour, and lost selling time. The variables are:

• How many SKUs run on the machine
• How often you switch
• How much of the changeover is mechanical versus tooling

If you run one product continuously, changeover barely matters. If you run twelve, a machine designed for fast changeover can justify a noticeably higher purchase price.

4. Labour

The count of operators is not always obvious. A single machine may run with one operator; a complete line with film supply, filling, coding and cartoning may need two or three. Include supervision, cleaning and changeover labour, not just attendance time.

5. Cleaning and compliance

For food, pharmaceutical and cosmetic work, cleaning and documentation are real cost lines:

• Time taken for cleaning between products
• Disposal of cleaning consumables
• Record-keeping and, where applicable, validation work

A wash-down design and a quick-release dosing system look like small specification choices. They show up directly in changeover time.

6. Maintenance and spares

Budget for a spares package covering the first two years of running: sealing elements, dosing wear parts, belts, sensors and filters. It is a modest fraction of the machine price, and it prevents a line standing idle waiting for a part that costs very little but takes weeks to arrive.

A simple way to build the business case

1. Fix the pack — film, dimensions, fill and annual volume.
2. Get realistic output — units per hour on your film, at your pack.
3. Price the film per pack — including your expected waste percentage.
4. Add conversion cost — labour, cleaning and maintenance divided by realistic output.
5. Divide by output — you now have a cost per pack you can compare against your selling price.

Where cost is often won or lost

Format. Thinner flat sachets use less film per dose than thicker stick packs. At high volume this is the difference that matters most.

Output. Multi-lane tooling on flat sachets is often the strongest lever available, provided your volume supports it.

Film specification. Specifying a heavier film than the product needs is a common and expensive default. Say what the barrier requirement actually is.

Speed on your film. A machine that runs your film at a lower speed than its maximum is still the right machine if that speed meets your volume. Paying for a higher maximum you cannot use is wasted money.

Frequently asked questions

Should I buy a complete line or a single machine?

If you are already producing film and packing into cartons elsewhere, a single machine is usually the sensible first step. If you are starting from nothing and have no film supplier or no secondary packaging, a complete line usually costs less overall because the interfaces between machines are where projects stall.

How much film waste is normal?

It depends almost entirely on run length. A line running one product for days wastes very little; a line switching every hour can waste a significant share of film consumed. This is why run length should drive changeover design rather than being treated as a separate concern.

What is usually forgotten in the budget?

Three items recur: installation and commissioning, a two-year spares package, and documentation requirements if you are working in a regulated sector. All three are cheap to plan for and expensive to add late.