CompAndSave is proud to offer wallet-friendly prices on our replacement HP DeskJet 840c ink cartridges with genuine-like quality and satisfaction. Why choose CompAndSave when shopping for HP 840c ink cartridges?

  • LOW PRICE GUARANTEE. Our HP DeskJet 840c cartridges are designed to ensure that you will get the same number of sheets and print quality as the genuine ones at a much lesser price.
  • WORKS LIKE THE ORIGINAL. Not sure on how to install replacement HP DeskJet 840c printer cartridges? Worry no more as CompAndSave's cartridges are designed to work and perform just like the original cartridges.
  • MORE DISCOUNTS. Enjoy even bigger discounts if you order HP DeskJet 840c ink cartridges in bulk. We have single and combo pack cartridges available like the HP 15 black ink cartridge (C6615DN). Make sure to explore different quantities to find the price break that suits you best.
  • NEXT DAY SHIPPING. HP 840c ink cartridge orders placed before 2:00 p.m. PST Monday through Friday will be processed the same day. Orders placed after 2:00 p.m. PST will be processed the following business day. Check our Shipping Policy for more information.
  • FREE SHIPPING. For U.S. orders, buy products up to $50 or more, and the shipping fee is on us!
  • SATISFACTION GUARANTEE. CompAndSave is so confident in the quality of our replacement HP 840c printer cartridges that we offer a FULL refund for orders returned within ten days upon delivery. We even issue refunds or store credit up to 365 days from the purchase date! Make sure to read our Return Policy for more details.
  • WILL NOT VOID PRINTER WARRANTY. Using replacement HP DeskJet 840c ink cartridges will never void your printer warranty. Visit our Ink Knowledge Base page for more details or contact us for any further questions.

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HP DeskJet 840c Ink Cartridges

Free shipping on orders $50 or more
All ink & toner come with a one-year 100% satisfaction guarantee.
Our products will never void your printer's warranty.

Replacement HP DeskJet 840c Ink Cartridges from $13.99

HP 15 Ink Cartridge Black, Single Pack
Replacement HP 15 Ink Cartridge - Black - C6615DN
Retail Price: $60.99

Save $42.04 (69% off retail price)

HP 17 Ink Cartridge - HP C6625AN - HP 17 Color Ink
Replacement HP 17 Ink Cartridge Tricolor - C6625AN
Retail Price: $64.99

Save $51.00 (78% off retail price)


How do I change the ink cartridge on a HP DeskJet 840C?

  1. Turn on your printer, then disconnect the power cord from the printer's back.
  2. Lift the cradle latch and open the top cover.
  3. Remove the old ink cartridge from its cradle.
  4. Get your new CompAndSave HP DeskJet 840c ink cartridge. Open it over a sink or garbage can to avoid any mess in case it leaks, as sometimes factories tend to overfill the ink cartridges. Make sure to touch the black plastic part only, then remove the covering tape that is usually bright in color along with the plastic protective case, if there is, before installing it.
  5. Insert the HP DeskJet 840c cartridge in the print cartridge cradle and press it down firmly.
  6. Close the latch on the cradle. You'll hear a click when the latch is entirely closed.
  7. Connect the power cord, then close the top lid.

HP DeskJet 840C Ink Cartridges FAQs

Can you use compatible ink cartridges in HP printers?
Yes, you can use compatible ink cartridges for your HP printer. Compatible, replacement, or remanufactured ink cartridges are designed to meet or exceed the OEM specifications. This means that you can get the same print quality and the number of prints without paying as much compared to the original ink cartridges. Our compatible, replacement, or remanufactured ink cartridges are also covered with a 1-year 100% satisfaction guarantee. CompAndSave offers the replacement HP 15 black ink cartridge and HP 17 tri-color ink cartridge for your HP DeskJet 840c printer.
Can I refill HP DeskJet cartridge?
You can have your HP DeskJet ink cartridges refilled up to three times. However, it is not recommended since it can cause printing issues such as smudges, uneven and poor print quality. If you wish to refill an empty ink cartridge, you will need the right tools and instructions to refill it properly. CompAndSave offers a wide variety of cheap printer ink cartridges at a much lesser price without compromising their quality if you choose to purchase a new one. Our ink cartridges are manufactured to meet or exceed the OEM specifications, which will save you from all the trouble of going through the process of refilling an ink cartridge.

Replacement HP DeskJet 840c Ink Cartridges Reviews