Finix vs. Square: How they compare
Square makes it easy to start accepting payments. As payment volume grows, many businesses begin looking for more pricing transparency, flexibility, and control.
Finix and Square pricing compared
Finix
Square
Pricing model | Subscription from $99/mo or interchange-plus custom | Flat-rate only. Free: $0/mo. Plus: $49/mo per location. Premium: $149/mo per location. Interchange-plus pricing generally unavailable to standard merchants |
In-person | 0% markup on interchange + $0.08/transaction | Free: 2.6% + $0.15. Plus: 2.5% + $0.15. Premium: 2.4% + $0.15 |
Online payments | Interchange + 0% + $0.15/transaction | Free: 3.3% + $0.30. Plus/Premium: 2.9% + $0.30 (raised from 2.9%/2.6% in Jan 2026) |
Manually keyed / card on file | Interchange + markup | 3.5% + $0.15 across all plans |
Interchange optimization | Full Level 2 & 3 support | Not available. Flat-rate pricing with no interchange-plus or L2/L3 optimization |
Virtual terminal | Included | Included. Browser-based virtual terminal available across plans |
Payment links | Included | Included |
ACH transactions | $0.50 flat | ACH via invoice: 1% (min. $1; $10 cap on Plus/Premium). ACH via API: 1% (min. $1, $5 cap) |
ACH validation | $0.50 flat | Included via Plaid authentication |
Instant payouts | 1% | 1.95% per transfer for instant or same-day transfers |
Fraud detection | Included (machine learning) | Included |
Chargeback fee | Standard | No chargeback fee (a genuine Square advantage) |
Support fees | Included. Dedicated account manager | Email and chat support; phone support on Plus/Premium plans only; no dedicated account manager |
Technology fees | None | None |
Merchant account model | Dedicated merchant account (direct processor) | Payment aggregator. Merchants share a pooled account with no dedicated merchant ID |
Quick recap of Direct Merchant Pricing Comparison
Square increased online processing fees for Free plan users from 2.9% to 3.3% in January 2026. Finix uses interchange-plus pricing, separating interchange from processor markup for greater cost transparency. This can be advantageous for businesses with debit-heavy or B2B card mixes, where transaction costs vary by card type rather than being charged at a flat rate.
Platform and marketplace features compared
Finix
Square
Pricing models | Flat-rate or dynamic, fully configurable per merchant | Not applicable — Square does not offer a platform or marketplace payment tier |
Interchange fee optimization | Full Level 2 & 3 support | Not available |
Merchant payout | $0.25/payout | Not supported — Square is a direct merchant processor, not a platform payments enabler |
White-labeling | No additional cost | Not available |
Sub-merchant onboarding | Supported | Not supported |
Split payments | Supported | Not supported |
Instant payouts to sub-merchants | 1% | Not supported |
Machine learning and fraud detection | Included | Not applicable for platform use |
Support fees | Included — dedicated account manager | Not applicable for platform use |
Technology fees | None | Per-location monthly fees apply to each merchant location |
Quick recap of Platform & Marketplace Pricing Comparison
Square is designed primarily for direct merchants rather than software platforms and marketplaces. Businesses that need embedded payments, sub-merchant onboarding, multi-party payouts, or white-labeled payment experiences typically require a platform-focused solution. Finix is built for these use cases, offering configurable payment operations, white-labeling, and support for platform and marketplace business models.
What growing businesses should know
Finix
Certified direct processor. Each merchant receives a dedicated merchant account that is individually underwritten
Interchange-plus pricing from day one, with no volume minimum and no flat-rate pricing that bundles processor margin into every transaction
Account stability by design: your risk profile is based on your business, not on the behavior of other merchants sharing a pooled account
Dedicated account manager included for all merchants. You'll have direct access to someone who knows your business and can answer questions as they arise
No long-term contracts or early termination fees, giving you flexibility as your business grows
Supports platform and marketplace payments with white-labeling, sub-merchant onboarding, and configurable payouts
Square
Payment aggregator — merchants process under Square's master merchant account alongside millions of others; no dedicated merchant ID
Flat-rate pricing across all card types: 2.6% + $0.15 in-person (Free plan), 3.3% + $0.30 online — raised in January 2026; no interchange-plus for standard merchants
Strong ease of onboarding and a broad ecosystem: POS hardware, online store, invoicing, payroll, appointments, and loyalty all in one platform
Because Square operates as a payment aggregator, account reviews, reserves, and fund holds can occur when automated risk controls are triggered.
No chargeback fee, which can be beneficial for businesses with higher dispute volumes.
Phone support limited to Plus and Premium plan subscribers; no dedicated account manager
Integration and customization options
Finix
RESTful API with webhooks and real-time event streams covering card payments and bank transfers
No-code onboarding tools alongside full API access, allowing non-technical teams to get started without dedicated developer resources.
Tokenization and hosted fields to reduce PCI scope
Dedicated sandbox environment for integration testing
White-labeled checkout pages, payment links, and a virtual terminal included, with no additional development required.
Square
Comprehensive developer platform: Square APIs cover payments, orders, customers, inventory, subscriptions, loyalty, and more across in-person and online channels
Web Payments SDK supports card, ACH (via Plaid), Apple Pay, Google Pay, and Cash App Pay in a single integration
Square App Marketplace allows third-party integrations with accounting (QuickBooks), CRM, e-commerce platforms, and vertical-specific tools
Sandbox environment available for testing payment flows
Developer documentation is well-maintained and includes extensive code samples across major server-side languages
Frequently asked questions
The two most significant differences are pricing model and account structure. Square uses flat-rate pricing, meaning every transaction pays the same percentage regardless of card type. Finix uses interchange-plus pricing, which separates the actual interchange cost from the processor markup, so merchants pay less on lower-cost card types like debit. Square is a payment aggregator, meaning merchants share a pooled master account with no dedicated merchant ID. Finix is a certified direct processor, and each merchant is individually underwritten with a dedicated merchant account.
As a payment aggregator, Square processes merchants under a shared master account. Risk decisions are managed centrally and often through automated systems. By contrast, Finix underwrites merchants individually before they go live, so account decisions are based on the specific business rather than activity across a broader merchant pool.
Not for most merchants. Square uses flat-rate pricing across all plan tiers — 2.6% + $0.15 in-person, 3.3% + $0.30 online on the Free plan (as of January 2026). Businesses processing more than $250,000 per year can discuss custom pricing with Square, but it remains negotiated and is not interchange-plus by default. Finix offers interchange-plus pricing to all merchants without a volume requirement.
Effective January 13, 2026, Square raised its online processing rate for Free plan users from 2.9% + $0.30 to 3.3% + $0.30, a 14% increase. Premium plan users saw rates move from 2.6% to 2.9% online. For a business processing $20,000 per month in online sales on the Free plan, that adds roughly $80 per month in fees with no change in service level. Finix's interchange-plus pricing does not work this way — the processor markup is fixed and transparent, and Finix does not adjust rates unilaterally.
No. Square is a direct merchant processing system and it is not designed for software platforms or marketplaces that need to embed payments, onboard sub-merchants, configure payouts to multiple parties, or white-label the payment experience. Businesses building payment functionality into their own product need a platform purpose-built for those use cases. Finix supports platform and marketplace payments with published pricing, sub-merchant onboarding, configurable payout structures, and white-labeling at no extra cost.
Yes. Finix supports full card data portability, meaning tokenized card data — including stored customer payment methods and subscription billing — can be migrated without requiring customers to re-enter their details. Finix's team works through the migration with you. Talk to our team to understand the specific steps and timeline for your setup.
Need help choosing the next payment solution?
Talk to our team. We'll help you find the right fit.
Growing out of Square is one of the most common reasons businesses come to Finix. Our team can walk you through the total cost of ownership, what a migration looks like, and how a dedicated merchant account changes your operational stability.