How long does toner last in a laser printer?
Toner life is rated in pages rather than time. A Brother TN830 is rated at 1,200 pages and a TN830XL at 3,000 at the ISO 5% coverage standard. For a household printing fifty pages a month, that is roughly two years and five years respectively.
The reason this question is confusing is that it is usually asked about time and always answered in pages. Both are useful, so this page gives you the conversion.
In pages, which is how it is rated
| Cartridge | Rated yield | Standard |
|---|---|---|
| Brother TN830 standard-yield toner cartridge | 1,200 pages | ISO/IEC 19752 |
| Brother TN830XL high-yield toner cartridge | 3,000 pages | ISO/IEC 19752 |
| Brother TN229XL black high-yield toner cartridge | 3,000 pages | ISO/IEC 19798 |
| Canon 125 black toner cartridge | 1,600 pages | ISO/IEC 19752 |
| Brother starter cartridge (in the box) | 700 pages | Brother stated yield |
Yields read from the manufacturers' own pages on 27 September 2026. Note the last row: the cartridge included with the printer is a starter, not a full one, which is disclosed on the spec sheet and still surprises people.
In time, which is what you asked
| Pages a month | A TN830XL lasts about |
|---|---|
| 10 | 25 years — you will replace the printer first |
| 25 | 10 years |
| 50 | 5 years |
| 100 | 2 years 6 months |
| 250 | 1 year |
| 500 | 6 months |
Simple division of the 3,000-page rated yield by monthly volume. Real life will be shorter because rated yields assume about 5% page coverage and most documents use more.
The top rows are the useful ones for most households, and they explain something that puzzles people: if a cartridge lasts five years, why does toner feel expensive? Because you are looking at the price of the cartridge rather than the price of a page.
Does unopened toner expire?
Not in any practical sense. Toner is a dry plastic powder with no solvent to evaporate, so an unopened cartridge keeps for years in a cool, dry place. Manufacturers print dates on cartridges, and in practice they are conservative.
The one genuine storage risk is extreme humidity, because a powder can absorb moisture and clump. A normal indoor cupboard is fine; an unheated damp garage is not ideal.
This is also the answer to the related question — do laser printers dry out — and it is the whole reason a laser suits sporadic printing.
Why yours runs out sooner than rated
- Coverage. Rated yields assume about 5% of the page covered. Dense text, tables with shading, or anything with a logo uses more.
- Short print jobs. Lots of one-page jobs use slightly more toner per page than one long job, because each job has start-up overhead.
- The starter cartridge. If the printer is new and toner ran out fast, it was probably the 700-page starter rather than a full cartridge.
- Low-toner warnings arrive early. Printers warn conservatively, and a cartridge showing a warning frequently has a meaningful number of pages left.
The other consumable
A laser has a drum as well as toner, replaced separately. Brother rates the DR830 on the models we cover at approximately 15,000 pages. Most households will never reach it — at fifty pages a month that is twenty-five years — but it belongs in the sum if you print heavily, and almost no laser roundup mentions it.
A note, because search engines conflate these
This page is about printer toner: the powder in a laser printer cartridge. If you were looking for how long hair toner lasts, this is the wrong site entirely and we have nothing useful to tell you.
Yield is only half of the figure that matters. Divide it by the cartridge price and you have the cost per page: what toner actually costs, cartridge by cartridge, with every price and date shown.
Toner is one of two consumables in a laser, and the other one has a much longer interval: drum unit vs toner explains which is which and how to tell them apart when print quality drops. If you would rather not track either, automatic toner ordering sets out what that convenience really costs.
A related question, and the one that decides whether to keep a spare in the cupboard: does toner expire? Sealed and dry, it keeps for years.