Find your printer's ink cartridge type before you buy

The first step is knowing which cartridges your printer uses. The model number is your key — it's usually on the front or back of the printer itself, or in your manual. Write it down or take a photo.

Once you have the model number, go to the printer manufacturer's website (HP, Canon, Epson, Brother, Lexmark, or whoever made yours). Search for your model in their support section. You'll find a page that lists the exact cartridge numbers — something like "HP 64XL" or "Canon PG-245." These numbers matter because cartridges are not interchangeable between brands, and even within the same brand, a cartridge made for one model won't fit another.

If you've lost the manual and can't find the model number, you can also open the printer's settings on your computer. On Windows, go to Settings > Devices > Printers & Scanners, click your printer, then click "Printer Properties." On Mac, go to System Preferences > Printers & Scanners, select your printer, and click "Options & Supplies." Both will show you the model number and sometimes the cartridge type as well.

Key Takeaways

  • Your printer model number determines which cartridges you need, and you can find it on the printer itself or in your computer's printer settings.
  • Most printers have separate cartridges for black and color (cyan, magenta, yellow), and you only replace the color that's actually empty.
  • Cartridges come in standard and high-capacity versions — high-capacity costs more upfront but prints more pages per cartridge.
  • The replacement process is the same across most brands: open the printer, remove the empty cartridge by pressing a tab or lever, and slide the new one in until it clicks.
  • After you install a new cartridge, the printer may ask you to run a cleaning cycle, which uses a small amount of ink but ensures good print quality.

Understand standard versus high-capacity cartridges

When you search for your cartridge number, you'll see two versions: standard and high-capacity (sometimes labeled XL or XXL). Standard cartridges are cheaper per cartridge but print fewer pages. High-capacity cartridges cost more but print significantly more pages before running empty.

The choice depends on how much you print. If you print a few documents a month, standard cartridges are fine and you won't waste money on ink that sits unused. If you print regularly — multiple documents a week or more — high-capacity cartridges usually cost less per page over time, even though the upfront price is higher.

Check the page yield on the cartridge box or product listing. It will say something like "approximately 200 pages" or "approximately 600 pages." This is an estimate based on 5% page coverage (a page that's mostly white text, not heavy graphics). Your actual yield will vary depending on what you print.

Buy cartridges from a reliable source

You can buy cartridges from the printer manufacturer's website, office supply stores like Staples or Office Depot, online retailers like Amazon, or big-box stores like Walmart or Target. Prices vary, so it's worth comparing a few sources before you buy.

Stick to cartridges made by your printer's manufacturer (called OEM cartridges, for Original Equipment Manufacturer). Third-party cartridges are cheaper but may not work reliably, and some printers will refuse to recognize them or will display warning messages. If you're on a tight budget, buy from the manufacturer's website during a sale rather than buying a cheaper third-party cartridge.

When you order, make sure the cartridge number matches exactly what your printer needs. A single digit difference means it won't fit. If you're buying in a store, bring your model number with you or take a photo of the cartridge slot to show a staff member.

Open your printer and locate the cartridge slot

Before you start, turn off your printer and let it sit for a minute. This prevents the print head from moving unexpectedly while you're working.

Open the printer's access panel. On most inkjet printers, this is the top cover or a side panel. You'll see a row of cartridge slots, usually with colored labels (black, cyan, magenta, yellow). The cartridges sit in these slots, and you may see a small plastic cap or protective cover over each one.

If there's a protective cover, remove it gently. Some printers have a lever or button you press to open the cover; others you straightforward pull off by hand. Don't force anything — if it doesn't move easily, you're probably pulling the wrong part.

Remove the empty cartridge and install the new one

Look for the cartridge that's empty or low. Most printers show you which one needs replacing on the display screen or in the printer settings on your computer. If you're not sure, you can gently press each cartridge — the empty one will feel slightly loose or will have less resistance.

Press the cartridge inward or downward (depending on your printer model) until you hear or feel a click. This releases the cartridge from its slot. Pull it straight out toward you. Don't tilt or twist it — straight out is the right direction.

Remove the new cartridge from its box and packaging. You'll see a plastic protective tape or seal on the cartridge. Peel this off completely — it's designed to keep ink from leaking during shipping, and if you leave it on, the cartridge won't work. Some cartridges have a small plastic cap on the nozzle; remove that too.

Align the new cartridge with its slot. The slot has a shape that matches the cartridge, so it will only fit one way. Slide the cartridge in straight until you hear a click. The click means it's seated properly and locked in place. If it doesn't click, pull it out and try again — forcing it can damage the cartridge or the printer.

Run the printer's cleaning cycle

After you install a new cartridge, turn the printer back on. Most printers automatically detect the new cartridge and will ask you to run a cleaning cycle. This cycle primes the print head and ensures the ink flows properly. It uses a small amount of ink, so don't skip it even though it seems wasteful.

If your printer doesn't prompt you automatically, you can start the cleaning cycle manually. On most printers, this is in the Settings or Maintenance menu on the printer's display panel, or in the printer software on your computer. Look for an option called "Clean Print Head," "Cleaning," or "Maintenance." The cycle takes a few minutes.

After the cleaning cycle finishes, print a test page. This confirms the cartridge is working and the colors are correct. Most printer software has a "Print Test Page" option in the settings menu. If the test page looks good, you're done.

Dispose of the empty cartridge responsibly

Don't throw empty cartridges in the trash. Many contain plastic and metal parts that can be recycled, and some retailers will take them back for free.

Office supply stores like Staples and Office Depot accept empty cartridges and will often give you a small discount on your next purchase if you bring them in. Some printer manufacturers also have mail-back programs — check the manufacturer's website for details. If you have several empty cartridges, a local recycling center may accept them as well.

If you're storing cartridges before recycling, keep them in a cool, dry place with the protective caps on. Don't expose them to extreme heat or direct sunlight, as this can dry out the ink.

Frequently Asked Questions

What if my printer won't recognize the new cartridge?

First, make sure you removed all the protective tape and caps from the cartridge. If you did, turn the printer off, wait 30 seconds, and turn it back on. If the printer still doesn't recognize it, remove the cartridge and reinstall it to make sure it's seated properly. If the problem persists, the cartridge may be defective — contact the retailer or manufacturer for a replacement.

Can I use refilled or remanufactured cartridges?

Refilled cartridges (empty cartridges filled with ink by a third party) and remanufactured cartridges (used cartridges rebuilt and resold) are cheaper than new ones but carry more risk. They may leak, clog, or fail to work at all. If you decide to use them, buy from a reputable seller and keep your receipt in case you need to return them. Your printer may also display warning messages about non-OEM cartridges.

How do I know when a cartridge is actually empty?

Your printer will display a low-ink or empty-cartridge warning on its screen or in the printer software on your computer. Some printers stop printing entirely when a cartridge is empty; others will print in black only if a color cartridge is empty. You don't have to wait until the printer refuses to print — you can replace a cartridge as soon as you see the warning.

Why is printer ink so expensive?

Printer manufacturers design cartridges to fit only their printers, which means you can't shop around for a cheaper alternative. The cartridge also contains a microchip that communicates with the printer, and the manufacturer invests in research to make sure the ink quality is consistent. High-capacity cartridges cost less per page than standard ones, so buying those can reduce your overall ink expense.

What should I do if ink leaks inside the printer?

Turn off the printer when ready and unplug it. Let it dry for several hours. If ink has leaked onto the paper tray or rollers, gently wipe the area with a lint-free cloth slightly dampened with distilled water. Don't use tap water, as minerals can damage the printer. If ink has leaked inside the print head area, contact the manufacturer — this usually requires professional service.