TN850
Compatible Brother TN850 Black High Yield Toner Cartridge
8,000 pages
$22.99
Save 64% vs genuine
Brother HL-L6400DWG toner
Your HL-L6400DWG takes the TN850 (high yield). At our price that is about 0.3¢ a page.
The Brother HL-L6400DWG is a mono laser printer in the HL-L6400 series, which shares cartridges across 6 models.
The cartridge it takes is the TN850, rated by Brother at about 8,000 pages, which works out to roughly 0.3¢ a page at our price of $22.99.
Brother has stated publicly that its firmware updates do not block third-party cartridges, and the printer counts pages rather than measuring toner, which is why the Replace Toner message can appear before a cartridge is empty.
When you compare prices, compare cost per page rather than the sticker price: a cheaper cartridge with half the rated yield costs more to run. Every cartridge here ships free, is covered by our printer damage protection and can be returned within 90 days, opened or not.
Cartridges that fit
What it costs you a month
About $9.66 a month in toner, roughly one TN850 every 3 months.
Questions about the HL-L6400DWG
What toner does the Brother HL-L6400DWG use?
The TN850. Brother lists this cartridge as compatible with this model, and the yields on this page are Brother's published figures.
Does using a compatible cartridge void the HL-L6400DWG warranty?
No. Under the Magnuson-Moss Warranty Act a manufacturer cannot void your warranty because you used a third-party cartridge. If one of ours damages the printer, our printer damage protection covers the repair.
Other Brother HL-L6400 models
Most of these share the same cartridges. Check the model page to be sure.
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Page updated Sep 22, 2026. Compatibility checked by Dan Whitaker, Print Technician. Brand names and part numbers are used only to identify compatibility. We are not affiliated with or endorsed by any printer manufacturer.