Pay per fax means you pay for the pages you send. If you send none, there is no sending charge. Minimum deposits and optional monthly fees still affect what you spend.
There are three pricing models to compare. A monthly plan includes a page allowance and suits you when your volume stays high. A prepaid balance pays for individual pages and suits occasional sends. A counter service charges per fax at a copy shop or shipping store, where staff handle the send for you.
If you want fax without a subscription, decide whether you need software access or someone to send a document for you. For one fax today with no account anywhere, start with one-time fax.
What a per-page price hides
An advertised page rate doesn't tell you the full cost of an occasional fax. Check these terms before you add credit.
- Cover pages count as pages. Include the cover in your total before you compare rates.
- Check what happens when the line is busy or nobody answers. Ask whether retries create extra charges.
- Read the failed-send rule. The terms should explain charges when no pages go through or only some pages do.
- Check the destination country. A domestic rate doesn't tell you what an international fax costs.
- Find the minimum top-up. The required deposit can be much larger than the charge for the fax you need today.
- Read the expiry terms for unused credit. Don't assume a balance stays available indefinitely just because the service has no subscription.
- Check number rental if you want to receive faxes. The monthly number charge is separate from any charge for incoming pages.
Credit expiry matters when months pass between sends. A low page rate helps less if unused money expires before you need another fax.
The prepaid wallet model
Fax for Agents offers pay as you go fax through an API for software and AI agents. You add money to a prepaid wallet, then pay for the pages you use.
Prices are as of 2026-10-28:
| Item | Price |
|---|---|
| Pages sent to the United States and Canada | $0.039 per page |
| Pages received in the United States and Canada | $0.019 per page |
| Number rental for receiving | $2 per number per month |
| Minimum wallet top-up | $10 |
| Optional Agent workspace | $19 per month |
| Sandbox with a test key | Free |
The optional Agent workspace adds dashboard tools for teams with several agents. Nothing on the API requires that subscription.
Failed sends aren't charged. For a partial fax, you pay only for the pages the provider confirmed. Busy and no answer are retried up to three times.
At the rate as of 2026-10-28, a three-page fax to a US number costs $0.117. Twenty such faxes a month cost $2.34. Three pages means three pages on the line, so a cover sheet would make it four. Those are usage charges. The minimum top-up determines how much you must put into the wallet before you start. Check the pricing details and refund terms before you add money.
The quote before the send
The API quotes each send before money is held. You create the document, then request a quote for its destination. The quote fixes the price for ten minutes. The quoted page count includes the cover page. Check that the total matches the document you intend to send. The quote also binds the destination and sender.
When you send the quote, the wallet holds the quoted amount. The initial response is a job in queued state. Live sends need a person's approval or a delegated policy that allows the send.
The receipt records the amount captured. Follow the send workflow for the document and quote steps.
When a subscription is the better deal
A subscription can be the better deal when you send a high, steady volume every month. Compare its full monthly bill with your actual page use. Include overage charges and any number rental in that comparison.
If your team needs a shared inbox, look at services built for people. A fax number used by many colleagues brings work beyond sending pages. Someone has to see incoming documents and decide who should handle them.
Fax for Agents is built for software and agents. Its optional team dashboard doesn't make it an online fax inbox for people.
Pay per fax for software and agents
A prepaid wallet limits the money available to a script. Per-agent budgets control how much of it each agent can use. Add a per-job amount cap to stop an expensive fax before it starts.
Administrators set these rules on the server. Each send is checked against the quote and the stored document. Prompt text cannot change the rules. Daily or monthly budgets refuse a wallet hold before money moves when the send would exceed the limit. An agent cannot raise its own budget.
Use delegated policies and budgets to set allowed destinations and page caps as well. Set each agent's budget to the spending you authorize, even if the wallet holds more for other agents.