Asset tags and barcodes: what to buy and how to label

Every inventory system, from a clipboard to a six-figure platform, rests on the same small thing: being able to point at an object and say which row it is. Get the labelling right and everything downstream is easy. Get it wrong and you spend the next three years typing serial numbers.

This is what to buy, how to number things, and how to make scanning work without any special hardware.

The tag is not the serial number

These are two different fields and conflating them causes most of the mess.

• The serial number is the manufacturer’s. It is what an insurer, a police report and a warranty claim need. It is long, inconsistent between makers, and nobody reads it aloud correctly.
• The asset tag is yours. It is short, sequential, and printed on a label you stick on. It is what people actually use.

Record both. Search by the tag, claim by the serial.

Numbering: keep it dumb

The temptation is to encode meaning into the tag — department, purchase year, category. Resist it. The moment a laptop moves from Finance to Sales, or a mic moves from worship to youth, a “smart” tag becomes a lie you cannot peel off.

Use a short prefix for the broad type and a sequence that never restarts:

Good	Why
LT-0042, MON-0117	Type plus a running number. Type rarely changes; everything else does.
000238	Even simpler. Perfectly fine, and impossible to contradict.

Avoid	Why
FIN-LAPTOP-2023-07	Encodes three things that all change, and two devices bought the same month collide.
Restarting at 1 each year	You now have two LT-0001s and a permanently ambiguous log.

Leading zeros are worth the trouble: they keep tags the same length, which makes them sort correctly and makes a mistyped one obvious.

Labels: what actually survives

• Paper labels from an office printer are free and last about six months on anything that gets handled. Fine for trialling a numbering scheme; not fine for a tool.
• Polyester or vinyl labels are the normal answer. They survive cleaning, handling and a few years of sun. A sheet of pre-printed sequential labels is cheap.
• Tamper-evident labels tear into pieces if peeled. Worth it for laptops that leave the building, pointless for a stapler.
• Metal or foil labels for tools, plant and anything that lives in a van or gets degreased.
• Engraving or a paint pen for the roughest environments. Not scannable, but it never falls off.

Put the label where a person will look without turning the item over — the top of a laptop lid is wrong, the palm rest or the base near the front edge is right — and put a second one inside the case for anything that travels.

Barcode or QR?

Code 128 is the sensible default for a linear barcode: it handles letters and numbers, it is compact, and every scanner made in the last thirty years reads it. QR codes hold more, survive being scuffed better because of their error correction, and can be read at odd angles — useful when the label is on the underside of something heavy.

For most people the honest answer is that it does not matter much. Pick one, use it everywhere, and make sure whatever reads it can read that format.

Two ways to scan, and neither needs a system

A USB scanner, about $25

This is the underrated one. A keyboard-wedge scanner does exactly one thing: it types. Plug it into a laptop, click into any field — a spreadsheet cell, a search box, a form — pull the trigger, and the tag appears as if you had typed it, followed by Enter. There is no driver, no integration and no configuration. It works with software that has never heard of barcodes.

The camera you already have

Chrome on Android can read barcodes and QR codes directly through the camera, with no app installed. That makes an Android phone a scanner for free.

The gaps worth knowing about, because they are bigger than most articles admit: Chrome and Edge on Windows do not support it — the browser exposes the camera but not the barcode decoder — and Safari does not support it either, so it does not work on an iPhone or iPad. In practice the camera is a bonus on Android, and a $25 USB scanner is the reliable path on a desktop or a laptop. That is not much of a compromise: a USB scanner is faster than a phone camera anyway, and it needs no driver.

The workflow that saves the most time

Scanning one item to look it up is mildly useful. The thing that actually changes an afternoon is a sticky scan mode: the scanner stays open and each scan pulls up the next item in turn. A stock-take becomes one walk round the room rather than a hundred separate lookups, and it is the difference between doing an audit annually and doing it when you feel like it.

A reasonable first afternoon

1. Pick a numbering scheme and write it down in one line.
2. Order a roll of sequential polyester labels, or print a sheet if you are trialling.
3. Walk the store room labelling everything, recording tag, item, make, model and serial as you go.
4. Photograph anything valuable while you are there — insurers ask.
5. Only then worry about the software.

Questions people actually ask about asset tags

What is an asset tag number?

It is a number you invent and stick on the item, so you can identify it without reading a serial plate. It is not the manufacturer's serial number and it should not try to be. A serial number belongs to the maker and tells you nothing about which of your sites the laptop is on; an asset tag number belongs to you, never changes, and stays on the item until the item is disposed of.

Should asset tag numbers be sequential?

Yes, and that is the whole system. Print a roll numbered 0001 to 0500 and use them in order, whatever the item is. The temptation is to encode meaning — LAP-DEL-012 for the twelfth Dell laptop — and it breaks the first time a laptop becomes a spare, moves site, or gets reassigned to someone in another department. A dumb sequential number never becomes wrong, because it never claimed anything in the first place.

Barcode or QR code on the label?

Barcode if a person with a scanner will read it, QR if a phone camera will. A 1D barcode is read instantly by a $25 USB scanner and is more forgiving of a bad angle. A QR code holds more and needs no hardware, but a phone camera is slower per item and much slower for a stock-take of two hundred things. If you are unsure, put both on the label — they cost the same to print.

What labels survive?

For office equipment, polyester or vinyl with a permanent adhesive. Paper labels fail on anything that gets handled, and the failure is slow enough that you do not notice until a quarter of your tags are illegible. For tools, vans and anything outdoors, pay for anodised aluminium or a laminated polyester — they survive solvent, heat and being dropped. Whatever you buy, order a roll with the numbers already printed rather than writing them.

Where does the tag number actually live?

In one column of one sheet, next to what the item is and who has it. The tag is only a pointer; everything that changes — location, holder, condition — belongs in the row, not on the sticker. That is why the number must stay dumb: the sticker is the one part of the system you cannot edit later.