Frequently Asked Questions

How do I know the standard-yield TN331 is genuinely enough for my printing?

Count roughly how long a cartridge normally lasts you. If a black cartridge carries you through several months of everyday documents, the TN331's 2,500-page rating at 5% coverage fits your rhythm and there is no reason to pay for capacity that would sit in the machine aging. If you are swapping black cartridges every few weeks, that is the honest signal to look at the high-yield TN336 instead.

What does each printed page cost with this cartridge?

At $31.33 for a rated 2,500 pages, black printing works out to roughly 1.25 cents per page in toner. Dense pages with heavy coverage use more toner than the 5% test standard, so real-world cost lands a little higher, but for text documents the figure is a fair planning number. For the three tiers of this platform priced side by side — TN331, TN336 and TN339 — and the per-page math that separates two tiers sharing one shelf price, see our Best Brother TN331 Toner Cartridges before you reorder the tier you have always bought.

What is the difference between the TN331 and the TN336?

They share the same physical form and fit the same printers; the difference is fill. The TN331 black is rated at 2,500 pages while the high-yield TN336 black stretches to 4,000. Choosing between them is purely a volume question, not a compatibility one.

Which printers does this cartridge fit?

This TN331 black cartridge works in the following Brother models: HL-L8250CDN, HL-L8350CDW, HL-L8350CDWT and MFC-L8600CDW

How will I know when the cartridge is truly finished?

Output gradually fades and the printer eventually flags toner end. A gentle rock of the cartridge side to side can redistribute the remaining toner for a short extra run, but once pages stay pale after that, the cartridge has given you its rated life and replacement time has arrived.

What protection do I get with a compatible cartridge?

Every cartridge is covered by a 1-year warranty and 1-year free returns under our shipping and returns policy, and it ships from our warehouses in IL, PA, GA or CA. Questions before or after ordering? Support is available 9 AM–5 PM CST.

Do copies on the MFC-L8600CDW shorten this cartridge's life?

Yes — a copy is a printed page, and on the MFC-L8600CDW copies come out of the same TN331BK as computer print jobs. Offices often judge a cartridge by the documents they send from their desks and forget the walk-up copying on top, then wonder why black ran out early. If your cartridge finishes ahead of your print-based estimate, the copy glass is the likeliest explanation.

How many two-sided sheets will this cartridge actually produce?

About 1,250. The 2,500-page rating counts printed sides, and a two-sided sheet holds two sides, so duplex printing halves the sheet count while leaving the page count — and the toner laid down per page — exactly as rated. For a printer producing double-sided reports and contracts, that sheet figure is the practical one to plan around; for single-sided work, expect the full 2,500 sheets.

How do I avoid ordering the wrong cartridge next time — TN331BK or TN336BK?

Read the full code on the box or on the cartridge you are replacing, and match it exactly. The two cartridges share the same form and fit the same printers, so the code is the only reliable guide: TN331BK is this 2,500-page standard yield, TN336BK is the 4,000-page high-yield fill. Ordering by the code rather than by appearance guarantees you receive the capacity you actually intended to buy.

Is it worth keeping a sealed spare of a single cartridge like this?

For most offices, yes. A toner cartridge kept sealed, flat and away from heat and direct light waits a long time without deteriorating, because the toner inside is a dry powder rather than a liquid that can dry out. Holding one TN331BK in reserve turns the toner-end message from a stop-work event into a two-minute swap, and the new cartridge can be ordered calmly afterward.

About This TN331 Black Toner Cartridge

This single compatible TN331 black cartridge is the standard-yield choice for Brother color laser and LED printers, rated at 2,500 pages and priced at $31.33. It suits steady, moderate document printing where the standard fill honestly matches the pace, and it can be paired with the individual color cartridges or the four-color set as your colors run down. Browse the full Brother range for the high-yield TN336 line if your volume grows.