Cheapest Online Fax Services: Send Faxes for Under $5/mo

By Michael Chen · Published April 30, 2026 · Updated July 16, 2026 · 9 min read

Big-name fax services have a pricing problem. eFax charges $18.99/month. RingCentral runs $17.99/month. MyFax asks $12/month. None of them offer a free trial.

The reality: the cheapest fax service for most people is one that charges $0 for occasional use, $3–5/month for a dedicated number, or nothing per month if you pay per fax. In 2026, you have more options than ever — and the major brands aren't among the best values.

This guide covers every genuinely affordable option: free services, the cheapest paid subscriptions, and pay-per-fax apps that cost nothing until you actually need to send something.

Quick Comparison: Cheapest Fax Services in 2026

1. FaxZero — Best Free Option for Rare Senders

FaxZero is the most practical free fax service available. No account required — enter the recipient's number, attach your document, and send. It works immediately.

How it works: Visit faxzero.com, enter the recipient's fax number, add your name and return number, upload a PDF or image, and send. No account, no credit card, no waiting.

2. mFax — Best Pay-Per-Fax Option (No Monthly Commitment)

Most fax services force a monthly subscription whether you fax once or a hundred times. mFax takes a different approach: download the app, and pay only for the faxes you actually send.

This makes mFax the strongest option for anyone who faxes occasionally — medical records, tax documents, legal forms — but doesn't want to maintain a $15/month subscription that sits unused for eleven months a year.

When mFax beats the free options: FaxZero gives you no delivery confirmation and no receive capability. If you need to confirm a fax arrived, or if someone needs to fax you back, mFax is the right call.

3. FAXAGE — Cheapest Monthly Subscription ($3.49/mo)

FAXAGE holds the record for the lowest monthly subscription price among established fax services. The Lite plan at $3.49/month includes a dedicated fax number with a local area code for receiving faxes, plus usage-based sending.

The math on FAXAGE: If you receive 10 faxes per month and send 5, you're looking at roughly $3.49 base + ~$1–2 in usage = $5/month total. That's still cheaper than any other service with a dedicated number.

The Professional plan at $7.95/month includes 300 inbound and 300 outbound minutes — roughly 100–150 pages each way — making it the better value for regular senders.

4. CocoFax Lite — Under $5 With a Full-Featured Plan

CocoFax advertises its Lite plan at $4.99/month, making it one of the few true under-$5 subscriptions on the market. The catch: that price requires annual billing.

The overage problem: At $0.20/page, exceeding your limit by 20 pages costs $4 extra — nearly matching your base monthly fee. If your usage is unpredictable, the CocoFax Lite plan is risky. Know exactly how many pages you send before committing.

5. Fax.Plus Basic — Best Value Under $7 for Regular Use

Fax.Plus (also labeled FAX.PLUS) doesn't break the $5 barrier, but at $6.99/month on annual billing, it delivers the best value among proper fax subscriptions — 200 pages per month at roughly $0.035 per page.

For comparison: the best online fax services guide covers a wider field, but Fax.Plus consistently ranks among the top value picks for moderate usage.

6. GotFreeFax — Reliable Backup Free Option

GotFreeFax works like FaxZero with a slightly different limit structure: 2 free faxes per day, 3 pages each, no account required, US and Canada only.

Why it matters: FaxZero limits you to 5 faxes per day. If you hit that limit, GotFreeFax gives you 2 more. Together, they give you 7 free faxes daily — more than enough for any non-business scenario.

Paid option: GotFreeFax sells prepaid credits at $9.95 for 100 pages (non-expiring). At $0.10/page, that's competitive with budget subscription overages — and you never lose unused credits.

Best for: Anyone who occasionally goes over FaxZero's daily limit, or who wants a clean fax without an ad page at zero cost.

Pay-Per-Fax vs. Monthly Plan: Which Actually Saves More?

The right choice depends entirely on how many faxes you send per month.

The break-even point: If a pay-per-fax service costs $1–2 per fax and a subscription costs $7/month, you break even at roughly 5–7 faxes per month. Above that, a subscription saves money.

The problem most people have: they estimate they'll send 20 faxes per month and actually send 3. Overestimating usage is the single biggest cause of overpaying for fax services.

Hidden Costs to Watch Out For

The advertised monthly price is rarely the complete cost. Before signing up, check every line item:

Overage fees are the biggest trap. CocoFax Lite charges $0.20/page over 60 pages. At that rate, a 10-page fax over your monthly limit costs $2 extra. Fax.Plus is more forgiving at $0.10/page, but it still adds up. Always check the overage rate — not just the base price.

Annual vs. monthly billing is how services advertise low prices they don't actually charge month-to-month. CocoFax Lite is "from $4.99/mo" — but that requires $59.88 paid upfront annually. The month-to-month price is $9.99. Always compare both.

Dedicated number add-ons catch people on free and ultra-cheap plans. A plan that sounds like $3/month may be receive-only, requiring a $3–$5 add-on for a send-capable fax number. FAXAGE bundles the number in — most free services don't.

Setup or activation fees are less common now but still exist on some older services. They range from $5–$15 one-time.

Number porting fees apply if you're moving an existing fax number from another provider. Expect $10–$25.

See our full breakdown of fax cost per page for a detailed look at what each page actually costs you across different services.

How We Evaluated These Services

We assessed each service on five criteria:

1. True cost per page — total monthly price divided by pages sent, including average overages
2. Receive capability — does the plan include a fax number for incoming faxes?
3. Mobile usability — can you send from a phone without friction?
4. Delivery reliability — confirmation receipts and reported success rates from user reviews
5. No lock-in — preference for services that don't require long annual commitments

Services that charge more for comparable features — including eFax ($18.99/mo), HelloFax/Dropbox Fax ($9.99/mo), and RingCentral ($7.99/mo) — were noted but excluded from the primary list. For a full market comparison, see our eFax alternatives guide.

For businesses that need HIPAA compliance, audit logs, or team accounts, budget services aren't the right fit — that's where mFax Business earns its premium.

The Bottom Line

The cheapest way to fax depends on how often you fax:

• Fax 1–2 times per month: FaxZero (free) or mFax (pay-per-fax, no monthly fee)
• Need a permanent fax number: FAXAGE Lite at $3.49/month
• Want under-$5 with 60 pages included: CocoFax Lite at $4.99/month (annual billing)
• Send 50–200 pages/month: Fax.Plus Basic at $6.99/month

For most individuals — someone who needs to fax a tax form, medical release, or lease agreement a few times a year — the answer is mFax. No subscription to forget, no monthly charge for months you don't fax, and a 4.8-star app that sends in under 2 minutes.

Download mFax — fax from your phone with no monthly commitment. Upload a document, enter the number, done.