Fax cost calculator: what your fax costs, page by page

How the fax cost calculator works

The calculator answers one question: starting from nothing, what is the cheapest way to send this fax with Faxvio, and what would the same fax cost elsewhere? It takes three inputs. The destination sets which country the number belongs to; the optional number lets the calculator apply the prefix rule, because a toll-free or premium prefix uses two pages per page; and the page count is the number of pages in the document, without the cover page, which is always free.

From those it computes the pages the fax will use, then the cheapest combination of the four packs that covers them. Faxvio sells 3 pages for $1.09, 7 for $1.99, 23 for $4.99 and 57 for $9.99, and the cheapest purchase for a given fax is not always the smallest pack that fits. Twelve pages, for instance, is cheapest as two 7-page packs at $3.98, leaving 2 pages; the 23-page pack at $4.99 costs a dollar more but leaves 11 for later. The calculator picks the lowest total and shows the leftover, so the trade-off is visible. Pages that are left over never expire.

The quote is produced by the same engine that runs in the app. It normalises the number to the international form, resolves the country from the dial code and the digits that follow, checks the destination against the app’s allow-list, and applies the two-page rule to toll-free, shared-cost and premium prefixes. If the number is not a valid fax number or the destination is not supported, the calculator says so, in the words the app uses, instead of inventing a price.

Every combination is considered, not only single packs. For a 12-page fax the four ways of buying enough pages in one go look like this, and the calculator picks the first row:

Worked examples: what common faxes cost

The table below prices the fax sizes people actually send, from the single page a bank asks for to a fifty-page claim file, all to a standard number. Each row shows the pages used, the cheapest purchase and the pages left in the balance afterwards.

A one-page fax to a standard number is what the free first page covers, so the first row is $0.00 for a new user. Service prefixes double the pages used, not the price per page.

How does the price compare with a subscription?

A subscription fax app charges for time, not pages: the largest one in the App Store by ratings sells a week for $9.99, a month for $29.99 or a year for $249.99, with no per-fax price. If you send one fax and cancel, the week is the cheapest honest way to use it, and the calculator shows that figure next to the Faxvio price. For the 3-page fax the calculator opens with, that is $9.99 against $1.09. For anyone who sends fewer than about thirty pages a week, every week, per page wins; for a business that faxes daily, a subscription with an inbound number is the right tool, and Faxvio does not pretend otherwise.

The two other pay-per-page apps in the US store are priced per credit, with the smallest purchases at $1.99 for 4 credits and $0.99 for 1 credit, and the calculator shows both at their published per-page rates as of 2026-09-02. Faxvio’s $0.36 per page on the smallest pack and $0.18 on the largest are lower at every size.

Does a toll-free number really cost twice as much?

Yes, and the reason is on the carrier’s side, not Faxvio’s. A call to a toll-free number is paid for by the party that owns the number, and the carrier that places the call is charged more to complete it than for a call to an ordinary landline; the same is true of shared-cost and premium prefixes, where part of the call charge is passed to the number’s owner. Faxvio passes that difference on as two pages per page rather than a separate price, so the balance stays in whole pages and the quote stays readable. The prefixes are listed by country on the destinations page; in the United States and Canada they are 800, 833, 844, 855, 866, 877, 888 and 900.

Many agencies that publish a toll-free fax number also publish a local one for the same machine. Where you have the choice, the local number costs half:

Cheapest single purchase from zero in each case; leftover pages stay in the balance. The free first page does not apply to service prefixes.

How to count the pages before you send

Count the pages of the document as it will be transmitted, not the sheets of paper. A double-sided form is two pages. A photo of a page is one page however large the image file is, because the app renders every page at fax resolution before sending. The cover page Faxvio generates is added on top and is never counted. When you import a PDF, the app counts the pages for you and shows the number on the page strip, and the quote on the number screen is the figure the server will actually deduct: the app never estimates a balance on the phone and corrects it later.

If the fax is larger than the pages you own, nothing happens until you buy a pack; if it is smaller, the difference simply stays in your balance. Sending a 3-page document to a standard number with 7 pages in the balance leaves 4, which is enough for the next form and a cover.

What the calculator cannot know

• Your existing balance. If you already own pages, the fax costs nothing new. The calculator prices from zero.
• Your storefront’s currency. Prices here are the US App Store tier; Apple sets the local equivalent, tax included, and the app shows it before purchase.
• Whether the fax will be delivered. A busy or wrong number returns the pages automatically, so a failed attempt costs nothing; the calculator prices a delivered fax.
• Page count of a file. Type the number of pages in your document; the app counts them for you when you import the file.

Bottom line

A fax with Faxvio costs the pages it uses, at $0.36 down to $0.18 a page depending on the pack: one page per page to a standard number in any of 37 countries, two per page to toll-free, shared-cost and premium prefixes, and nothing for the cover page or for a fax that fails. A 3-page fax to a standard US number is $1.09 on the smallest pack, against $1.99 and $2.97 on the two other pay-per-page apps and $9.99 for a week of the largest subscription app, at prices read on 2026-09-02.