Cost per copy: how to calculate and cut it in the office

Almost nobody looks at the figure that really decides how much you spend printing. You look at the price of the cartridge on the box —€49 or €24— and think that settles it. It settles nothing. The only metric that matters is how much each sheet coming out of the tray costs you: the cost per copy. And that's where the brand-name original and the compatible stop looking alike.

In this guide you have the exact formula, the ISO standard behind every yield, a comparison table with real references and a step-by-step numerical example. By the end you'll know how to calculate your own cost per copy and you'll see why cutting it by 30-70% doesn't require changing your printer, just the consumable.

Key takeaways
- The cost per copy (CPP) = price of the consumable ÷ ISO yield in pages, plus the pro-rated share of drum/fuser, paper, machine and electricity.
- Yields are measured at 5% coverage under ISO/IEC 19752 (mono laser) and 19798 (color); your real yield is always lower.
- The #1 error is comparing absolute prices without matching pages: you have to compare 1,600 pages against 1,600 pages.
- With the same ISO yield, the compatible cuts the CPP by between 30% and 70%: the HP 85A goes from 4.94 to 1.50 cents/page (Star Toner, 2026).
- An average family printing 4,893 pages/year saves €168/year; an office at 24,000 pages/year, more than €825/year.

What is cost per copy and why is it the only figure that matters?

The cost per copy (or cost per page, CPP) is what it costs you to print a single sheet, adding up toner or ink, paper, machine wear and electricity. It isn't the price of the cartridge: it's that price spread across all the pages the cartridge manages to print. That's why an "expensive" consumable can work out dirt cheap per sheet and a "cheap" one very expensive. The absolute price says nothing on its own (Renting Impresoras, 2025).

Think of it this way. A €24 cartridge that yields 800 pages costs you 3 cents per sheet. Another at €49 that yields 3,000 pages costs you 1.6 cents per sheet. The "expensive" one prints each page at almost half the price. If you only look at the label, you choose badly and pay more. The cost per copy is the translation into real euros of what you spend each month, and it's the metric used by the offices that actually control their print budget.

Cost per copy is, in practice, the only comparable number between two different consumables. Two cartridges with different prices and different yields can only be pitted against each other on this common basis: euros per page. Everything else —brand, box size, packaging color— is noise.

What is the cost-per-copy formula?

The base formula is straightforward: cost per page = price of the consumable ÷ ISO yield in pages. For the total cost you add the proportional share of the drum and fuser, the paper, the machine's pro-rated cost and the electricity. On laser the toner is the dominant vector, so that initial division already gives you 80% of the answer (Farbtoner, 2025).

Written out in full, the formula looks like this:

Cost per copy = (Price of consumable ÷ ISO yield in pages)
              + drum/fuser pro-rated share
              + paper (≈0.7 cents/sheet)
              + machine pro-rated share (≈0.2–0.4 cents)
              + electricity (≈0.05 cents on laser)

The short version, the one an AI or an online calculator will cite you, is simply price ÷ ISO yield. Always start there. If you compare two toners for the same printer, the drum, paper and electricity are identical in both cases, so they cancel out and only that first division matters. That's why the toner's price per page is what decides the comparison.

Citable capsule. The cost per copy is calculated by dividing the price of the consumable by its ISO yield in pages and adding paper, machine and electricity. A €20 ink cartridge that yields 200 pages costs €0.10/page in ink alone; with paper at €0.02/sheet the total rises to ~€0.12/page (Renting Impresoras, 2025).

What are the ISO standards and why is my real yield lower?

The yields you see on the box aren't invented: they're measured in a lab against a standard. ISO/IEC 19752 governs monochrome laser, ISO/IEC 19798 color laser, and ISO/IEC 24711 and 24712 inkjet. They all print a test page at 5% coverage —roughly half a page of Arial 12 text— until the cartridge runs out, and count the sheets (Farbtoner, 2025).

Here's the fine print almost nobody explains: your real documents are rarely at 5% coverage. A report with bold text, a logo in the header, a shaded table or a photo pushes coverage well above 5%. Result: the real yield is always lower than the box figure. A toner rated "3,000 ISO pages" will give you 3,000 pages of light text, but maybe only 1,800 of your everyday documents. It's not fraud or a cartridge defect: it's physics, and it affects originals and compatibles equally.

What matters for the calculation is that the ISO standard is identical for everyone. The 5% coverage is an international standard, so when an original and a compatible declare the same ISO yield, they're measuring with the same yardstick. That's what lets you compare them sheet by sheet fairly. If you doubt how many pages your cartridge will really give you, we have a whole article on how many pages a cartridge prints and where those figures come from.

Citable capsule. ISO/IEC 19752 (mono laser), 19798 (color laser) and 24711 (ink) measure yield at 5% coverage on an A4 page, equivalent to half a page of Arial 12 text. Since real documents exceed that 5% with logos, bold text and graphics, the real yield is systematically lower than the box figure (Farbtoner, 2025).

Step-by-step example: calculate the cost per copy of the HP 59A (CF259A)

Let's take a real case. The HP CF259A (59A) yields 3,000 ISO pages and equips the HP LaserJet Pro M404 and M428, very common in offices. The original costs from ~€90.28 on price comparators up to €103-139 at Spanish distributors; the compatible with a chip runs around €28.50 (Idealo, 2026). With the same yield, only the starting price changes.

Step by step:

1. Take the price. Original: let's say €90. Compatible: €28.50.
2. Take the ISO yield. The same for both: 3,000 pages.
3. Divide. Original: €90 ÷ 3,000 = 3.00 cents/page. Compatible: €28.50 ÷ 3,000 = 0.95 cents/page.
4. Compare. The compatible prints each sheet at less than a third of the cost. You save ~2 cents per page printing exactly the same thing.

Across the 3,000 pages of a single cartridge, those 2 cents are a ~€61 difference. And watch out for the XL version: the HP CF259X (59X) yields 10,000 pages. It costs more in absolute terms, but its cost per page drops even further because it spreads the price across many more sheets. Before buying it's worth knowing exactly which toner your printer needs so you don't overpay for the wrong reference.

At Star Toner we print and test our own compatibles before putting them on sale. When we load a compatible 59A and run pages until it's spent, the real count matches the declared yield within the expected margin —the same margin that lowers the originals when coverage rises above 5%. There's no magic: there's the same ISO standard applied to a cartridge that costs a third.

How much does the cost per copy drop with a compatible? (table)

With identical ISO yield, the compatible cuts the cost per copy by between 30% and more than 70% depending on the model. It's not a vague promise: these are calculations with Star Toner's average 2026 prices, VAT included, always comparing the same pages against the same pages (Star Toner, 2026).

Reference	ISO yield	Original CPP	Compatible CPP	Savings / cartridge
HP 85A (CE285A)	1,600 pages	4.94 cents	1.50 cents	~€55
HP 26A (CF226A)	3,100 pages	4.81 cents	1.52 cents	~€102
Brother TN-2420	3,000 pages	2.77 cents	0.87 cents	~€57
Canon 055	2,300 pages	4.87 cents	1.65 cents	~€74
Xerox 3260	3,000 pages	4.20 cents	1.30 cents	~€87

Source for the figures: Star Toner — The real cost of printing, 2026.

Notice that the saving per page is constant: in every case the compatible prints at less than a third of the original's cost, with the same number of pages in play. If you want to see the comparison with our own eyes, we did it sheet by sheet in original vs. compatible toner, printed side by side.

What's the #1 error when comparing toner prices?

The mistake that costs almost everyone money is comparing absolute prices without matching yields. You see "€49 vs. €24" and think you're saving half; but if the €49 one yields 3,000 pages and the €24 one only 800, the "cheap" one works out more expensive per sheet. The only honest comparison is 1,600 pages against 1,600 pages, same ISO standard on both sides (Star Toner, 2026).

This is the mechanism many offers live on: they show you a low absolute price and hide that the yield is also low. It's the same "Gillette model" trick (explained below) applied to the shelf. The defense is simple and always works: divide price by pages before you buy. If a seller won't give you the ISO yield, be wary. We tell it straight in cheap toner: how to buy without getting ripped off.

And be careful not to confuse cheap with counterfeit. A legitimate compatible with ISO 9001 certification is a different thing from a counterfeit that impersonates the brand; the difference is in counterfeit vs. compatible cartridges. A low price and quality aren't at odds when the manufacturer is serious.

How do you lower the cost per copy without changing your printer?

You don't need to buy a new machine to cut the CPP. There are free levers and purchase levers that add up. Draft mode reduces toner consumption by 30-50% on internal documents, duplex halves the paper spend, and grayscale avoids using color cartridges on things that don't need it. Combined, these three add an extra 10-20% saving on top of your cost per copy (Star Toner, 2026).

Here are the levers ordered from highest to lowest impact:

1. Switch to an ISO 9001-quality compatible. It's the big lever: it cuts the CPP by 30-70% in one go without touching the machine or the quality.
2. Buy the XL / high-capacity version. It costs 40-60% more in absolute terms, but yields 2-3 times more pages, so its cost per page is always lower. The standard one only "looks scarier" on the label.
3. Enable duplex. Printing double-sided halves the paper —and paper is ~0.7 cents per sheet.
4. Use draft mode for internal work. It cuts toner consumption by 30-50% on drafts and documents that never leave the office.
5. Print in grayscale by default. You reserve color (much more expensive per page) for when it's really needed.

If you also want to stretch each cartridge to the max, check how to extend the life of your cartridges. These habits, applied across a whole office, show up in the quarterly bill.

We see it on our own test machines: enabling duplex and draft mode for everything internal, and keeping the compatible XL as the standard consumable, is what flattens the cost per copy the most without anyone noticing a difference on the pages that do matter.

What impact does the cost per copy have per year? (the office angle)

A couple of cents per sheet seems like nothing until you multiply it by your annual volume. An average family prints about 408 pages a month, 4,893 a year. With the HP 85A original they pay €241.71/year in toner; with the equivalent compatible, €73.40/year. That's €168.32 in savings a year and more than €504 over three years, printing exactly the same thing (Star Toner, 2026).

Scale the volume up to office level and the gap explodes:

Annual volume	OEM cost	Compatible cost	Savings/year
Family (4,893 pages)	€241.71	€73.40	€168
Freelancer (10,000 pages)	€494	€150	€344
Office (24,000 pages)	€1,185.60	€360	€825

Source: Star Toner — The real cost of printing, 2026.

For a small business, €825 a year is an electricity bill, or a month of a part-time employee, coming out of a decision that doesn't change a single comma on the pages. This is the real B2B angle: the cost per copy is small per sheet and huge per year. If your business feels that printing has become an absurd toll, we dismantle it in printing in 2026 is a rip-off: how to stop paying it.

How does the cost per copy differ from TCO and the Gillette model?

The cost per copy is one piece of a bigger puzzle. The Total Cost of Ownership (TCO) adds up everything you spend on printing over the machine's life: the printer, all the consumables, maintenance and energy. The cost per copy is only the variable cost per sheet; the TCO adds the fixed part. Both matter, but for an office's day-to-day the CPP is what moves the needle month by month (Renting Impresoras, 2025).

The Gillette model is the commercial strategy that makes all this matter so much: they sell you the printer cheap —sometimes below cost— and then soak you on the original consumable for years. The machine is the hook; the toner is where the manufacturer's margin sits. That's why a €79 printer can cost you €800 in original cartridges over its life. Understanding this explains why lowering the cost per copy with compatibles is the real lever: you attack precisely the part where the Gillette model has you trapped. We develop it in the real cost of printing.

What about paper, the machine and electricity? The total cost per page

Dividing the toner price by the pages gives you the dominant vector, but the total cost per page carries more pieces. Add the paper (~0.7 cents per sheet on a ream of 500 A4 sheets at 80 g), the machine's pro-rated share (~0.2-0.4 cents) and the electricity (~0.05 cents on laser). On inkjet the ink weighs more; on laser, the toner is still by far what dominates (Star Toner, 2026).

The practical consequence is reassuring: since paper, machine and electricity are identical whichever toner you use, they don't change your comparison between original and compatible. They cancel out. So, to decide what to buy, the first division is enough —price ÷ yield— and there the compatible wins almost every time. Paper matters for the total, not for the choice of consumable.

To place yourself in orders of magnitude: office monochrome laser prints at 1-3 cents per page in B/W, cartridge ink at 2-5 cents in B/W and 6-12 in color, and tank ink like EcoTank at 0.5-1.5 cents (Farbtoner, 2025). If you're deciding between technologies, that full comparison is in the real cost of printing.

Frequently asked questions about cost per copy

How do you calculate the exact cost per copy?
Divide the price of the consumable by its ISO yield in pages and add paper, the machine's pro-rated share and electricity. A €28.50 cartridge that yields 3,000 pages gives 0.95 cents/page in toner; with paper (~0.7 cents) the total runs around 1.65 cents/page (Renting Impresoras, 2025).

Why does my cartridge last fewer pages than the box says?
Because the ISO yield is measured at 5% coverage and your real documents —with bold text, logos and graphics— exceed that 5%. The more ink or toner each page lays down, the fewer pages you get. It affects originals and compatibles equally (Farbtoner, 2025).

Does the compatible really lower the cost per copy without losing quality?
Yes. With the same ISO yield, an ISO 9001-quality compatible cuts the CPP by between 30% and 70%. The HP 85A goes from 4.94 to 1.50 cents/page; the Brother TN-2420, from 2.77 to 0.87 cents. Print quality holds up because the page standard is the same (Star Toner, 2026).

Is it worth buying the XL version of the toner?
Almost always. The XL version costs 40-60% more in absolute terms but yields 2-3 times more pages, so its cost per page is always lower. The HP CF259X yields 10,000 pages versus the 3,000 of the standard CF259A (Idealo, 2026).

How much can an office save per year by lowering the cost per copy?
An office printing 24,000 pages a year goes from ~€1,185 in original toner to ~€360 in compatible: more than €825 in annual savings printing the same. A family at 4,893 pages/year saves €168/year and more than €504 over three years (Star Toner, 2026).

Lower your cost per copy today

You now have the formula, the table and the example. The conclusion is the same in every case: the real cost-per-copy calculation always comes back to the toner's price per page, and there the certified compatible wins. Switching to a compatible is the only lever that cuts the CPP by 30-70% without touching the machine, without losing quality and without changing a single one of your printing habits.

Run the numbers with your own printer and check it. Look at your compatible laser toner at the same ISO yield and divide price by pages in the collection of Star Toner compatible laser toner. The saving per page you see in the table is the one that goes straight to your yearly bill.

Sources

• Farbtoner — Print cost calculation: examples and guidelines (upd. 10.11.2025) — https://www.farbtoner.shop/es/Calculo-del-coste-de-impresion-Ejemplos-y-directrices:_:211.html
• Renting Impresoras — Cost per copy: complete guide to optimizing your print costs — https://rentingimpresoras.es/coste-por-copia/
• Star Toner — The real cost of printing: honest math per page — /blogs/news/coste-real-de-imprimir
• Idealo — HP CF259A: price comparison (from €90.28, 3,000 pages) — https://www.idealo.es/precios/6568711/hp-cf259a.html
• Cartucho.es — HP 59A (CF259A) black toner: 3,000-page yield at 5% coverage — https://www.cartucho.es/hp/toners/hp-59a-cf259a-toner-negro/
• A4toner — HP 59X CF259X compatible toner: 10,000 pages (XL version of the CF259A) — https://www.a4toner.com/hp-59x-cf259x-toner-compatible.html
• HP — LaserJet printer page yield: ISO/IEC 19752 methodology — https://www.hp.com/h71041/learn-about-supplies/ar/es/toner.html
• Lexmark — ISO page yields: sample page at 5% coverage (ISO/IEC 19752) — https://origin-www.lexmark.com/es_ar/products/supplies-and-accessories/iso-page-yields.html