By Sarah Martinez · Published April 3, 2026 · Updated June 8, 2026 · 9 min read
Buying fax paper sounds straightforward — until you order the wrong core size, receive rolls that don't fit your machine, or watch important documents fade after a year. Fax paper comes in two completely different types, multiple roll sizes, and several sensitivity grades that affect print quality. This buyer's guide covers everything: what type your machine uses, how to read spec labels, which brands to trust, and how to store paper so records don't vanish.
Skip the hardware entirely? mFax lets you send and receive faxes from your phone — no paper, no machine, no supply runs. But if you're maintaining a physical fax machine, read on.
Thermal Paper vs Plain Paper: Which Does Your Machine Use?
The single most important question when buying fax paper is: does your machine use thermal paper or plain paper?
Thermal fax machines use heat-sensitive paper rolls. A print head with tiny heating elements activates a chemical coating on the paper surface, producing black marks without any ink or toner. These machines are compact, quiet, and cheap to operate. The downside: the output fades.
Plain paper fax machines (laser or inkjet multifunction printers with fax capability) use standard cut-sheet copy paper alongside toner or ink cartridges. The output is permanent and identical to a laser printout. Currently, roughly 60% of active fax machines in offices use plain paper.
| Feature | Thermal Paper Fax | Plain Paper Fax (Laser MFP) |
|---|---|---|
| Paper format | 8.5" roll | 8.5" × 11" cut sheets |
| Ink/toner required | No | Yes |
| Output durability | 5–7 years (ideal), can fade sooner | 50+ years |
| Paper cost per page | ~$0.035–$0.042 | ~$0.01–$0.02 (paper only) |
| Total cost per page | ~$0.035–$0.042 | ~$0.04–$0.10 (paper + toner) |
| Machine cost | Lower | Higher |
| Output feel | Glossy, curls slightly | Matte, flat |
Check Before You Buy
Standalone thermal fax machines have been discontinued by all major manufacturers (Brother, Sharp, Panasonic, Canon). If you're running a legacy machine, thermal rolls are still widely available — but new machines sold today are plain-paper laser MFPs. Buying thermal rolls for a laser MFP won't work.
How to Read Thermal Fax Paper Specs
Thermal fax paper specs appear on every product listing. Here's what each measurement means.
Width: Always 8.5 Inches for US Fax
US fax machines transmit and receive Letter-format pages at 8.5 inches (216mm) wide. Every thermal fax roll you'll find at Staples, Office Depot, or Amazon for a US machine is 8.5" wide. If you're sourcing internationally, confirm 216mm — European machines often use A4 (210mm), which is slightly narrower.
Core Inner Diameter: The Spec That Causes Most Returns
The core is the cardboard tube at the center of the roll. Your machine's paper spindle must fit inside it.
- 0.5 inch (½") — the near-universal standard for standalone thermal fax machines. This fits Canon FaxPhone, Brother IntelliFax, Panasonic KX, Sharp UX, and most others.
- 1 inch — found in some high-volume office combination units.
- Coreless — a small number of specialty rolls have no core; rare in fax applications.
Check your machine's manual before ordering. The wrong core diameter means the roll won't seat on the spindle.
Roll Length and Page Yield
| roll length | approx pages | packs available | best for |
|---|---|---|---|
| 98 ft (30m) | ~107 Letter pages | 6-pack typical | Light to moderate use |
| 164 ft (50m) | ~179 Letter pages | 4-pack typical | Moderate to heavy use |
| 328 ft (100m) | ~358 Letter pages | Single or 2-pack | High-volume offices |
The 98' roll is the most widely stocked and easiest to find at retail. The 164' format reduces how often you change rolls. Page yields are estimates based on 11-inch letter-length pages — shorter faxes give more pages per roll.
Paper Weight: 55 GSM Is Standard
Most thermal fax paper is 55 g/m² (GSM). Some products list caliper (thickness) at approximately 2.3 mils. Heavier paper (60–65 GSM) handles better and curls less, but is less common and costs more. For everyday fax use, 55 GSM is fine.
Sensitivity Grade
Sensitivity determines how much heat is needed to activate the coating — which affects image boldness:
- Standard sensitivity — adequate for all machines, lower image contrast
- High sensitivity — bolder output, sharper text, currently the most common grade at retail
- Ultra-high sensitivity — maximum contrast; useful if your machine's print head is aging or runs at lower temperatures
All sensitivity grades are physically compatible with any thermal fax machine. Higher sensitivity just produces better-looking output.
BPA in Thermal Paper: What You Need to Know
Thermal paper's heat-sensitive layer historically used BPA (bisphenol A) as the color developer. A single thermal receipt can contain 250–1,000 times more BPA than a food can. BPA absorbs through skin contact and is linked to endocrine disruption and reproductive harm.
Current status: Connecticut, Minnesota, and Washington have banned BPA in thermal paper, with phase-out deadlines between 2023 and 2026. Most US retail fax paper is now BPA-free — but many manufacturers replaced BPA with BPS, which carries similar health risks.
What to look for:
- "BPA-free" — eliminates BPA, but may contain BPS
- "BPS-free" — eliminates both; better
- "Phenol-free" — eliminates all phenol-based developers including BPA and BPS; the safest option
Terminal Depot (Made in USA) explicitly labels their paper as BPA-free. For high-volume users who handle paper daily — healthcare offices, legal clerks — phenol-free paper is worth the small price premium.
Healthcare Note
If your office sends or receives faxes with PHI (protected health information), phenol-free thermal paper reduces daily chemical exposure for staff. That said, the bigger compliance question is whether your fax service has a BAA — see our guide on HIPAA fax requirements.
Top Fax Paper Products (2026)
| product | format | price | per page | notes |
|---|---|---|---|---|
| Staples Thermal Fax Paper | 8.5" × 98', 6-pack | ~$22–$27 | ~$0.035–0.042 | Widely available, solid quality |
| Terminal Depot (Made in USA) | 8.5" × 98', 6-pack | ~$23.99 | ~$0.037 | BPA-free, 55 GSM, 0.625" core — verify fit |
| Universal UNV35758 | 8.5" × 98', 6-pack | ~$23–$26 | ~$0.036 | Ultra-high sensitivity, tested to IBM spec |
| Business Source BSN01908 | 8.5" × 98', 55 GSM, 6-pack | ~$22–$25 | ~$0.034 | Staples/Office Depot staple; reliable |
| Staples 164' roll | 8.5" × 164', 4-pack | ~$28–$33 | ~$0.039 | Fewer roll changes for busy machines |
| POSPaper.com generic | 8.5" × 98', 6-pack | ~$23.15 | ~$0.036 | Good bulk pricing; ships from specialty supplier |
Which to buy: For most offices, the Staples brand or Universal 6-pack of 98' rolls is the right call — widely available, correctly specced for common US fax machines, and priced fairly. If you want BPA-free paper and can verify the 0.625" core fits your machine, Terminal Depot is a good domestic option.
Bulk Buying Tip
Specialty paper suppliers like ThermalPaperDirect.com and ThermalRoll.com offer case pricing that reduces per-roll cost by 15–30% versus retail. If you're running a busy fax machine and go through more than two 6-packs a month, case buying pays off quickly.
Plain Paper for Fax Machines
If your fax machine is a laser or inkjet MFP, you're buying standard Letter-size copy paper (8.5" × 11"), not rolls.
For faxing specifically, any 70–90 GSM multipurpose paper works. Higher-weight paper (90 GSM / 24 lb bond) runs cleaner through the fax function and is less prone to jamming. Avoid recycled paper with visible grey flecks — fax reception at 204 DPI benefits from a bright white base.
The paper itself costs $0.01–$0.02 per page at retail ($5–$10 per 500-sheet ream). Toner adds $0.03–$0.08 per page, bringing the total to $0.04–$0.10 per page for laser fax — comparable to thermal paper when all consumables are counted.
If you're troubleshooting blurry fax output, the paper quality is rarely the cause — fax resolution settings and line quality matter far more.
Cost Per Page: Full Breakdown
The true cost of fax paper isn't the sticker price — it's cost per page including all consumables.
| Paper type | Paper cost/page | Additional consumables | Total cost/page |
|---|---|---|---|
| Thermal (98' roll, $4/roll) | ~$0.037 | None | ~$0.037 |
| Laser plain paper | ~$0.015 | Toner: $0.03–$0.08 | ~$0.045–$0.095 |
| Online fax (mFax) | $0 | Subscription or per-fax fee | Varies |
For occasional faxing, paper costs are trivial. For offices sending hundreds of pages per month, see our full fax cost per page breakdown for a complete analysis including machine amortization and maintenance.
How to Store Thermal Fax Paper
Thermal paper is chemically active — the coating doesn't stop reacting after printing. Improper storage causes fading, whether on blank rolls or printed pages.
Storage conditions for rolls and printed pages:
How long does thermal paper last?
- Blank rolls in original packaging: 5+ years
- Printed pages in ideal storage: 5–7 years (manufacturer rating); up to 25 years for archival-grade paper
- Printed pages stored poorly (PVC sleeve, heat): can fade within 18 months or less
The US National Archives (NARA Bulletin 96-03) recommends photocopying or scanning all thermal fax records that must be retained permanently. For any legal, medical, or financial document received by fax: scan to PDF the day you receive it.
Fax Records and Legal Holds
Thermal fax paper does not meet the durability standards for legal records retention in most jurisdictions. If your industry requires document retention for 7+ years (healthcare under HIPAA, financial under SEC rules), scan every incoming fax immediately. A plain-paper photocopy also works, but scanning to PDF is faster and produces searchable records.
Compatibility: Will This Paper Work with My Machine?
Generic thermal fax paper is broadly compatible across brands — Canon FaxPhone, Brother IntelliFax, Panasonic KX, Sharp UX, Samsung SF, and others all use the same 8.5" roll standard. The two things to verify:
- Core inner diameter — 0.5" is near-universal, but some machines take 1". Check the manual.
- Roll diameter — confirm the loaded roll fits inside the paper compartment. Most 98' rolls are approximately 1-15/16" (49mm) in diameter.
Thermal transfer machines (some Brother/Panasonic models) are a different category entirely. They use a ribbon cassette (like the Brother PC301 or PC501) plus plain paper — not a direct thermal roll. The PC301 cartridge yields approximately 250 pages at around $12–$18.
If you're setting up a fax machine for the first time, our fax machine setup guide covers paper loading step by step for all major brands.
Do You Still Need Fax Paper in 2026?
Standalone thermal fax machines are no longer manufactured. Every major brand — Brother, Sharp, Panasonic, Canon — discontinued thermal fax hardware years ago. Thermal paper demand persists only for legacy machines still running in offices.
The installed base isn't small: healthcare alone exchanges 9+ billion fax pages per year, most via plain-paper laser MFPs. But the growth in fax is entirely digital. Cloud fax services are growing at 10.3% CAGR and projected to reach $782 million in 2026.
If you're still running a thermal fax machine, thermal rolls will remain available from specialty suppliers for the foreseeable future. If your thermal machine dies, replacing it with a laser MFP or switching to an online fax service are both more practical than finding another thermal machine.
mFax eliminates paper entirely — send faxes from your phone in under 2 minutes, no machine required. Over 5 million users have made the switch. See how it compares in our guide to faxing from your iPhone.
Fax Paper Buying Checklist
Before you order, confirm:
Send Faxes Without Paper
If managing thermal rolls, toner cartridges, and paper storage sounds like more overhead than it's worth, mFax is the practical alternative. Upload any document, enter the fax number, and send — from your phone, tablet, or browser.
For personal faxing, the mFax app sends and receives faxes with a 98% delivery success rate and a 4.8-star App Store rating.
For business teams, mFax Business adds virtual fax numbers, HIPAA compliance features, and team accounts — starting at about $9/mo (billed annually). And unlike rigid fixed-tier services, you build your own plan, dialing in the exact seats and pages you need and paying only for what you use. No paper. No machine. No fax-paper runs to Staples.