Choose a laser printer if you print lots of black text on plain paper and want speed and a low cost per page. Choose thermal inkjet if you print less, need colour, or want a cheap machine that is ready to print at once. Thermal inkjet (TIJ) is the heat-driven inkjet method used in most home and office inkjets and in industrial coding heads. The comparison is not quite like for like, because a laser prints with toner and a TIJ head fires liquid ink. This guide covers what separates them, what each costs to run, where each fails, and when a stamp does a repeat job better than either.
TL;DR
- Laser suits high-volume text: it is generally faster and uses toner that does not dry out in a printer left idle.
- Thermal inkjet suits lower volumes, colour and varied media, but the ink is the long-term cost and heating elements wear.
- Industrial TIJ is a coding technology for packaging, with print quality up to 600dpi.
- Audit your annual page volume and total cost of ownership before you compare machine prices.
- For the same mark repeated all day (an address, a date, a “PAID” or a logo), a custom rubber stamp is faster and cheaper than printing.
Table of Contents
- What the two technologies actually do
- Thermal inkjet vs laser: side-by-side
- Speed and volume
- Running costs: where the real difference sits
- Print quality and what you print on
- Reliability and the downsides
- Which one should you choose?
- Our view as stampmakers
- When a stamp is the better tool
- A practical checklist before you buy
- FAQ
- Sources
What the two technologies actually do
How a laser printer works
A laser printer projects light onto a photosensitive drum to imprint toner, which is then fused to the sheet. The fusing uses heat and pressure, which is why laser output is dry the moment it leaves the tray and why it resists smudging.
The process is built for volume. Once the drum is charged and the toner loaded, the machine can turn out hundreds of near-identical pages with very little variation. That is why laser is the default in offices that print contracts, reports and invoices.
How thermal inkjet works
Thermal inkjet is a drop-on-demand design. A tiny resistor in the ejection chamber heats, and the resulting pulse pushes a droplet out of the nozzle. Thermal DOD printers are also called bubble jet printers. Most desktop inkjets from the big consumer brands work this way, and so do the cartridge-based coders you see on cartons and packaging lines.
The key point for buyers: the ink must survive the heating step. Research on inkjet inks notes that TIJ ink has to withstand 350 to 400 °C for a few microseconds. That restricts which dyes and polymers can be used, which is one reason TIJ is rarely the right tool for unusual surfaces or specialist inks.
Where “thermal printer” causes confusion
People searching this topic often mix up three things:
- Thermal inkjet: liquid ink, heated nozzle, discussed here.
- Direct thermal and thermal transfer label printers: they use heat on special paper or a ribbon, with no liquid ink or toner. They are common for shipping labels and till receipts.
- Laser: toner and a drum.
If you want a shipping label printer, a direct thermal machine is a different category. If you want to choose between a laser and an inkjet for general documents, read on.
Thermal inkjet vs laser: side-by-side
| Factor | Laser | Thermal inkjet |
|---|---|---|
| Speed on text pages | Generally faster | Slower on most desktop models |
| Cost per page, high volume | Usually lower | Usually higher |
| Machine price | Often higher | Often lower |
| Colour and photos | Acceptable, mainly for business graphics | Stronger for colour-sensitive work |
| Idle behaviour | Toner does not dry out | Ink can dry and clog if unused |
| Moving parts | More | Fewer |
| Energy use | Heat for fusing | Typically lower |
| Ink or toner choice | Wide, well established | Limited by heat tolerance |
| Best fit | Contracts, invoices, reports | Low volume, colour, varied media |
Treat the table as a tendency, not a rule. Individual models differ, and some business inkjets are fast and cheap to run.
Speed and volume
Laser printers are typically faster, whereas inkjet suits customised and colour-sensitive work. If a queue of people waits at a shared machine, speed matters more than any other line in the table.
Industrial settings reverse some of the picture. Packaging coders use TIJ because it has no start-up downtime and cartridge-based, maintenance-free operation. That is a different job from printing A4 letters: the machine marks a date or batch code on a moving carton, not a full page of text.
Two guides to buying printers for organisations point the same way on the first step. Industry commentary says the choice between inkjet and toner is largely decided by production volume and the need for variable data. Count your pages before you read a single spec sheet.
Running costs: where the real difference sits
The sticker price tells you little. Office inkjets were built around a model in which the device is cheap and the consumables carry the revenue, a business model established by HP and Canon in the 1980s. A low machine price can therefore sit next to a high long-term cost per page.
Laser has the reverse profile: more money up front and, at moderate to high volume, a lower page cost. Toner also tolerates a quiet month, while inkjet ink can dry in a printer that is left off for a long time.
For public-sector and school buyers, government guidance advises against comparing device costs alone. It suggests auditing annual print volumes, locations and total cost of ownership, and notes that several smaller devices can sometimes beat one high-output machine on both cost and resilience.
A simple way to do this yourself:
- Count pages printed over the last three months and multiply by four.
- Split them into black text and colour.
- Find the manufacturer’s stated page yield for each ink or toner cartridge and the current price.
- Divide cartridge price by yield to get a cost per page for each machine you are considering.
- Add the machine price spread over three years, plus energy and any service contract.
If you want worked examples for small firms, our guides on laser versus tank inkjet for small businesses, the hidden costs of colour laser versus inkjet and laser versus ink tank at 50 to 150 pages a month go through the sums in more detail.
Print quality and what you print on
Text
Laser gives crisp black text on plain office paper, and most buyers who write contracts, letters and forms choose it for this reason. Good inkjets can match it on coated or inkjet-specific paper, but plain copier paper often lets ink spread slightly.
Colour and graphics
Inkjet is the stronger choice when colour fidelity matters. Laser can handle images, but not as well. If your work is leaflets or photos, inkjet or a dedicated digital print service is the better route. For small runs of products or merchandise, see our comparison of inkjet and digital printing at 300 items a month.
Industrial coding
TIJ can print up to 600dpi, and costs about two-thirds as much as continuous inkjet per 1,000 prints, according to one UK coding supplier’s published notes. That is a vendor’s claim about its own product category, so treat it as a guide to scale rather than a guarantee for your line.
Paper and labels
Paper choice changes the result more than people expect. Laser paper handles heat well, while inkjet paper is tuned to absorb liquid. Test one sheet before buying a ream: our note on inkjet versus laser paper for small businesses explains how. Laser heat can also curl or soften some label sheets, so check that any label stock is rated for your printer type. For labels made by small makers, see inkjet versus laser labels.
Reliability and the downsides
Thermal inkjet
- Heating elements wear. As ink vaporises, a burnt-on coating forms on the element. It can eventually stop the pressure pulse that fires the drop, and this is a main cause of failure in continuous, high-volume duty.
- Ink limits. Heat tolerance narrows the ink choice, as above.
- Unsuitable for precision multi-colour work in industry. Technical commentary says thermal printing in general is poorly suited to high-precision, multi-colour or complex graphics.
- Sustainability. The same source questions the volatile organic components in some thermal ink formulations. Check the safety data sheet if this matters to your procurement policy.
Laser
- Higher purchase price.
- More moving parts, though machines last well under steady use.
- Heat for fusing, which can distort some media.
- Colour is passable but not the strongest.
Energy
In UK business buying, inkjet is gaining ground partly because it typically uses less energy than toner-based laser and has fewer moving parts. A UK public sector tender for multifunction devices even specifies heatless inkjet printers for energy efficiency. If you report on carbon footprints or Scope 3 emissions, this may carry weight in your decision.
Which one should you choose?
| Your situation | Likely better choice |
|---|---|
| Shared office, hundreds of black pages a month | Laser |
| Occasional printing, mostly at home | Inkjet, or a tank model if volume grows |
| Colour leaflets, photos, crafts | Inkjet |
| School or public body, many users | Run a total cost audit, then probably laser or a business inkjet fleet |
| Packaging line needing date or batch codes | Industrial TIJ or other coding technology |
| Same mark repeated again and again | Rubber stamp |
If you are choosing between two models of the same type, the cheapest per-page figure is not always the best. Add the cost of downtime and of staff walking to a shared machine.
Our view as stampmakers
We make custom rubber stamps for the UK market, so we see how people actually mark documents. A lot of printing is not really printing. It is the same address block, the same “RECEIVED” mark, the same logo applied to the same envelopes or boxes.
For that kind of job, the thermal inkjet versus laser debate is the wrong starting point. A printer needs a computer, a queue, a cartridge and a sheet that fits. A stamp needs a hand and an ink pad. If the content never changes, a stamp is usually quicker, and it works on envelopes, cartons, bags and forms that a desktop printer will not take.
We wrote about this in more detail in Inkjet vs Thermal Is the Wrong Question. Our advice is simple:
- Print what changes: letters, invoices, reports, colour work.
- Stamp what repeats: addresses, dates, approvals, return details, logos, packaging marks.
- Do not buy a faster printer to solve a problem a stamp already solves.
If you are not sure which side of the line your job falls on, ask us before you buy. Expert advice before and after purchase is part of how we work.
— Steven
When a stamp is the better tool
Check whether any of these describe your week:
- Marking envelopes or parcels with a return address.
- Approving, dating or numbering paperwork in a law firm, school office or clinic.
- Branding packaging for small orders, where a printed label would waste time.
- Adding a logo to cards, bags or bespoke paper.
Our range covers the typical cases: personalised stamps, text with logo stamps, personalised logo stamps, stamps for packaging and heavy-duty Trodat Professional Line stamps for high-use desks. You can also browse by sector or by use. Replacement ink pads are available in the stamp ink collection, and the design process guide explains how artwork becomes a finished stamp.
A practical checklist before you buy
- Define the job. Is the content changing or fixed?
- Measure the volume. Pages or marks per month, now and in two years.
- Check the media. Plain paper, labels, card, envelopes, cartons.
- Compare total cost. Machine, consumables, energy, downtime.
- Test before committing. Run one sheet, one label, one impression.
- Plan for idle periods. Inkjet ink can dry if the machine sits unused.
- Ask about sustainability. Energy use, consumable waste and ink chemistry.
FAQ
Is a laser printer better than a thermal printer?
For high-volume black text on plain paper, usually yes. Laser is generally faster and has a lower cost per page at volume. A direct thermal printer is better for shipping labels and receipts, because it needs no ink or toner, so the two are suited to different jobs.
What is the downside of a thermal printer?
The heating element wears. In thermal inkjet, ink residue builds up as a burnt-on coating and can eventually stop the nozzle firing. Ink choice is also limited because the ink must tolerate very high temperatures, and thermal output suits simple work better than complex multi-colour graphics.
Does a thermal printer ever run out of ink?
A thermal inkjet does, because it uses liquid ink cartridges, and the cartridge is the main running cost. A direct thermal label printer has no ink at all and only needs heat-sensitive paper. Check which type you are buying before you compare consumable costs.
Are laser printers being phased out?
There is no sign of that in the sources we reviewed. Inkjet is gaining ground in offices, partly on energy use and fewer moving parts, but laser remains the standard for heavy text printing. Most organisations still choose by volume and total cost of ownership.
Sources
- Types of Printer Copiers, photocopier.org.uk
- Looking to clean up your coding operation? BFBi
- Buyer considerations: drupa insights on production print purchasing decisions, IPIA
- Is your industry one that should invest in inkjet? IPIA
- Buying for schools: multi-functional devices and printing, GOV.UK
- Multi Functional Devices and Digital Solutions, Find a Tender
- The Emergence of Commercial Inkjet, University of Cambridge
- Doctoral thesis on inkjet mechanisms, University of Reading
- Scale-up of polymeric inkjet inks, White Rose thesis