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Processor Rating No. 026  ·  The Anti-Brochure Series
Stax
The subscription-pricing pioneer with genuinely honest paper, and a documented record of what happened when a merchant asked it to prove the bill: an admitted billing glitch, a refusal to show the statements, and the words “we are not an accounting firm.” And from our own audit files: a membership model that, more often than not, cost more than the interchange-plus deal it was sold against.
weAUDIT SCORE 53 OUT OF 100
Scored under the weAudit Rating Methodology · Last updated July 2026 · Every claim linked to its source
Regulatory & Legal Record
25/25
Fee Practices & Contract Terms
8/25
Complaints & Resolution
8/20
Corporate Transparency
5/15
Sales Channel Conduct
7/15
Company Snapshot
Who you’re actually signing with
Company
Stax Payments, Orlando, Florida, founded 2014 as Fattmerchant and renamed Stax in 2021. The company built its brand on subscription pricing: a flat monthly membership with interchange passed through at wholesale, sold as the transparent alternative to percentage markups, with three published plans tiered by sales volume and more than 200 software integrations. Company and rename documentation · Pricing model documentation
Model
A true merchant account, not a closed aggregator, with third-party gateway support that deserves precise description: Stax’s materials describe working with multiple established gateways such as Authorize.Net and NMI, independent review adds Priority, First Data, and TSYS connections, and Authorize.Net pairing is marketed for token portability, stored customer cards living at the third-party gateway. But read the mechanics before calling that open: gateway compatibility runs only as far as what is certified to the underlying processing platform and what Stax will provision through your account manager, a supported menu, not a bring-your-own door. And note what the menu is missing: the named options are generalist retail gateways, none of them data-enhanced gateways performing automatic Level 2/3 interchange optimization, which means the B2B merchant who most needs gateway choice is steered toward Stax’s own platform for enhanced-data submission. More flexible than the locked doors on this board; not the open road the marketing implies. Multi-gateway support (company materials) · Token portability documentation · Gateway compatibility review
Credit where due, up front
This page’s credits are unusually real, so we lead with them: month-to-month terms, no early termination fee, cancellation on 30 days’ notice, published plan pricing, and independent review reporting that nearly every small-business reviewer saved money on processing costs. One reconciliation matters before you read on: those savings comparisons are against tiered and flat-rate competitors, and they are real. Our own audit files, below, run the only comparison that measures true cost, against a pure interchange-plus deal, and reach a different answer. The contract terms are among the most merchant-friendly we have rated; the price of the membership is another matter. Contract terms and savings documentation
The ratings
A genuinely split record: a 3.6-star Trustpilot average across more than 1,200 reviews, one of the better distributions on the mid-board, with positive reviews praising onboarding and support by name, sitting beside a BBB record whose complaint specimens are among the most severe in this series, documented below. Trustpilot record · BBB complaint record
What this rating measures
Not the pricing model, which is honest, but the documented conduct when the model met reality: billing classification errors, cancellation processing, equipment fulfillment, and above all, what the company did when merchants asked it to prove the bill.
The Headline Finding
The transparency company that wouldn’t explain the bill
The documented account that anchors this rating, from the BBB complaint record: a years-long Stax merchant discovered their transactions were being classified as card-not-present when the card was present for over 95% of sales, a classification difference that bills at significantly higher rates. When they raised it, Stax acknowledged, per the merchant’s account, an internal glitch that their engineers were aware of and working on.
Follow what happened next, because it is the whole page in one sequence. The merchant asked for statements demonstrating they were being charged the correct rate. The company, per the complaint, refused, asserted the rates were correct, and when pressed, sent random data that did not answer the question, telling the merchant they could calculate it themselves from what was provided. The merchant did. Their calculation showed overcharges. The company’s documented reply: as they are not an accounting firm, they do not need to explain the charges to their customers. Read that sentence twice, from a processor whose entire brand is pricing transparency. In our professional opinion, this is the most important specimen in this company’s file, not because the glitch existed, glitches happen, but because the response to verification is where a processor shows you its actual policy. An honest billing error, acknowledged, is corrected with statements and a refund. A billing error defended with refused documentation, decoy data, and a declaration that explanation is not owed, is not an error anymore. And the practical lesson generalizes to every merchant on any processor: the bill’s accuracy is not the processor’s department. It is yours, or it is nobody’s.
SOURCES: BBB complaint record (CNP misclassification account)
The same complaint file documents a second specimen of stakes: a merchant assessed a $5,000 card-network fee following an April 2025 compliance audit they learned about only in October 2025, alleging Stax never properly set up their account for surcharging compliance, never registered them with the card networks, and never proactively checked, a $10,000 total dispute over compliance work the merchant believed the processor was performing. Allegations, reported as allegations, and a reminder that on a processing account, the fees you can see are not the only fees in play. SOURCE: BBB complaint record (surcharging compliance account)
The Structural Finding
Two portals, one relationship
Where the fees live is not where you work
A documented multi-business merchant account preserves a structural detail worth every Stax customer’s attention: the platform they used daily to process cards and see activity was one login, while the statements and fees lived in a separate portal. The same account describes the onboarding pitch consistently representing transparency and simplicity, followed a short while later by rates increasing in the form of fees we were never informed about. Connect the architecture to the outcome: a merchant who lives in the processing portal, watching sales flow smoothly, is a merchant who does not visit the building where the fees are posted. This is subtler than a hidden fee, and in our professional opinion it deserves its own name: visibility partitioning. Nothing is concealed, everything is technically disclosed, and the disclosure lives one login away from anywhere you’d see it. The subscription model’s genuine honesty makes this more consequential, not less, because a merchant sold on transparency stops checking. The record above shows what an unchecked account accumulates.
SOURCES: Documented merchant account (portal structure and uninformed fees)
Displayed, Not Scored · Single Documented Account
A $5,000 penalty for a setup that was never finished
Surcharging sold, registration allegedly skipped, assessment delivered
Card-network surcharging, passing your processing cost to card-paying customers, is legal only inside strict network rules, starting with registration. A documented BBB complaint alleges Stax set up a merchant’s surcharging but never registered them with the card networks and never proactively checked compliance, and the merchant learned of an April 2025 network audit only in October 2025, when a $5,000 assessment arrived; their complaint seeks $10,000 across two issues. This is one merchant’s account, reported as an allegation and, per our methodology’s treatment of single-account matters, displayed here without moving the score. The structural point stands on its own regardless: surcharging is a product where the processor’s paperwork is the merchant’s legal shield, the fine for a hole in that shield lands on the merchant, months late, at network scale, and any merchant using any processor’s surcharging product should demand written proof of network registration today, not after the audit.
SOURCE: Documented BBB complaint (allegation)
From Our Own Audit Files
We ran the numbers on the membership. The membership lost.
This finding is first-party, from weAudit’s own casework, labeled under Rule 9 of our methodology: when we have run the numbers on subscription-style accounts against a pure interchange-plus deal, more often than not the flat monthly fee ended up costing the merchant more. Not more than Square. Not more than tiered pricing. More than the straightforward, disclosed-markup deal the membership was invented to sound better than.
To understand why this model exists, understand the industry that produced it. There are thousands of ISOs, independent sales organizations, the companies that sell merchant processing, and here is the secret the brochures cannot say out loud: they are all buying substantially the same service at substantially the same buy rates. When every competitor’s cost is identical, differentiation is a marketing assignment, and the marketing department’s answer is to invent a pricing brand: wholesale pricing, which does not exist, because interchange is not a wholesale price anyone gets special access to, it is the same cost every processor on earth pays; or a membership fee, which converts the markup into a number that feels transparent precisely because it is impossible to evaluate. That is the trick, and in our professional opinion it is the most sophisticated one on this board: you can see exactly what you paid, a simple flat rate, and you cannot calculate what it meant. Did you pay 2 basis points over the true cost of your transactions? On the accounts we audit, we would say with great confidence you paid closer to twenty times that, and had no idea, because the model is engineered so that the one number that matters, your markup over true cost, is the one number the statement cannot show you. A price you can see but cannot evaluate is not transparency. It is legibility wearing transparency’s clothes.
Under Rule 6, price level is a fee practice, and under Rule 9 our audit files are evidence. This finding costs Stax one point in Fee Practices and two in Corporate Transparency.
SOURCE: weAudit audit files, accounts anonymized; membership-model economics computed against pure interchange-plus equivalents across audited statements. First-party professional experience and opinion, labeled under Rules 6 and 9 of the weAudit Rating Methodology.
Category 1 of 5
Regulatory & Legal Record25 / 25
No FTC actions, state attorney general enforcement, class actions, or card network fines against Stax or Fattmerchant were located. Full marks under the formula, with the caveat that now travels with every clean docket on this board: a decade-old private company’s empty courthouse file and the complaint record documented below are two different measurements of the same business, and the next four categories are where this company’s documented record actually lives.
SOURCES: Record review
Category 2 of 5
Fee Practices & Contract Terms8 / 25
1
The paper is good; the price is the findingNear-full marks on exit structure: no early termination fee, month-to-month terms, 30 days’ notice, a combination rare on this board and scored generously. But under Rule 6, the membership model itself takes a deduction on the strength of our audit-files finding above: a flat fee that usually exceeds a pure interchange-plus deal is a price-level practice, however clean the contract that carries it.
2
Escalation by other namesA documented account of being brought in at a certain rate and switched after three months for no stated reason; the documented pattern of rates increasing in the form of fees merchants were never informed about; and the CNP misclassification above, which functions as a rate increase wearing a classification error, defended rather than documented when challenged.
3
The cancellation that never landsThe no-ETF paper meets a documented processing reality: a merchant billed $209 monthly on terminals never delivered, refund refused, return labels promised and never sent, drafts accumulating to roughly $2,900 until the merchant stopped payment at their bank; another documenting twelve months of cancellation requests while charges continued; another describing the company changing its stated reason the cancellation hadn’t processed, even against email proof. An exit that is free on paper and unreachable in practice is scored on the practice.
SOURCES: BBB review record (rate switch, cancellation accounts) · Undelivered-terminal and post-cancellation billing accounts · Contract terms documentation
Category 3 of 5
Complaints & Resolution8 / 20
The distribution is genuinely split, and the score reflects both halves. Credit: a 3.6 Trustpilot average across 1,200+ reviews with support staff praised by name is a better testimonial record than most of this board can show. Deductions: the documented themes run severe, post-cancellation drafting across multiple independent accounts, billing on undelivered equipment, the misclassification account above, transaction limits documented blocking legitimate sales and triggering customers’ bank fraud flags, a chargeback dispute where submitted proof of services rendered was, per the merchant, mishandled, and an applicant denied without stated reason after full document submission. Resolution scores low for a specific documented reason: the company visibly responds to complaints, but the responses preserved in the record are condolence form letters, and the substantive requests inside the complaints, statements, refunds, return labels, went unmet per the accounts. Responding is not resolving, and this category has always scored the second one.
SOURCES: Trustpilot distribution and chargeback account · BBB review record (limits, denial, responses) · Unanswered contact documentation
Category 4 of 5
Corporate Transparency5 / 15
Published subscription pricing earns some credit here, and the Fattmerchant-to-Stax rename is clean and well documented, but the audit-files finding above caps the pricing credit: a published number that defeats calculation of your markup over true cost is disclosure of the payment, not of the price, and this category measures whether a merchant can answer what they actually pay. The deductions: private ownership with no public disclosure; the documented two-portal architecture that partitions fee visibility away from the working interface; and the defining communication specimen of the file, a company that, asked to demonstrate its own billing was correct, refused the statements, supplied noise, and disclaimed the obligation to explain. Transparency is not what a company publishes about its prices. It is what a company produces when a customer checks the math, and on the documented record, the checking was treated as the problem.
SOURCES: Published pricing documentation · Portal structure documentation · Verification-refusal account
Category 5 of 5
Sales Channel Conduct8 / 15
No agent army, a real product, and a pitch the billing didn’t keep
Credit first: direct sales, no documented independent-agent network, published pricing a rep cannot easily inflate, onboarding that even critical accounts describe as smooth and personable, and real, though bounded, gateway flexibility: a supported menu of third-party gateways with marketed token portability, meaningfully more open than the locked doors this board penalizes, though short of the bring-any-gateway freedom the framing implies, since options run only as far as platform certification and Stax provisioning, and the menu includes no data-enhanced gateway for B2B interchange optimization. The flexibility is noted without a scoring credit: a menu is not a door, and the membership underneath it stays priced as the audit-files finding above documents. The deductions are the documented distance between pitch and statement: onboarding that consistently represented transparency and simplicity followed by fees merchants were never informed about; the three-month rate switch; and equipment sold, billed, and never delivered. This board has scored sales channels whose misconduct is the business model. Stax’s is different in kind: a channel that sells an honest product accurately, attached to operations that, on the documented record, do not always deliver what the channel promised. The merchant experiences the same gap either way.
SOURCES: Onboarding pitch and fee documentation · Rate switch account
The Bottom Line
If you process with Stax today
Is Stax a good processor? Based on the documented record, Stax scored 53 out of 100 under the published weAudit Rating Methodology, a band reserved for companies whose documented record warrants extreme caution: merchant-friendly contract terms, no ETF, month-to-month, set against documented billing misclassification defended with refused statements, fees arriving uninformed, post-cancellation drafting across multiple accounts, a stated position that explaining the charges is not the company’s obligation, and, from our own audit files, a membership model that more often than not cost more than a pure interchange-plus deal while making that comparison nearly impossible to run. The gateway menu is broader than most, the contract is honest, and the price is the finding.
Three things to do this week:
1
Audit your card-present versus card-not-present mixPull three months of statements and compare the CP/CNP classification against how you actually take cards. The defining specimen in this file was a swiped-card business billed at keyed-card rates behind an admitted glitch. If your mix looks wrong, demand the interchange detail in writing, and do not accept summary data as an answer.
2
Log into the other portalIf your daily workflow lives in the processing interface, set a monthly calendar reminder to open the statements portal and read every fee line against your plan. The documented uninformed-fee pattern lived precisely in the building nobody visited. Your subscription price is published; verify that what you pay matches it.
3
Price the membership against a disclosed markup, then chooseIn our professional opinion, the structure to prefer is a processor charging a fixed, disclosed discount rate over interchange, not a fixed monthly fee, because a disclosed markup is a number you can verify on every statement, and a membership is a number you can only trust. Take three months of your actual interchange detail, add a competitive disclosed markup, and set it beside your total membership and per-transaction costs. Our files say that comparison usually embarrasses the membership; run it on your own numbers.
4
If you cancel, cancel at both endsSend written notice per your 30-day term, get written acknowledgment with an end date, and then watch your bank account for drafts past that date, because the documented record shows acknowledgment and cessation are different events here. If drafts continue, the specimen merchants’ endgame, a stop-payment order at the bank, should not have to be yours, but know it exists.
“We are not an accounting firm,” said the processor. We are.
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