Square

Square is the pragmatic default for small businesses that take money in person — retail counters, cafes and restaurants, salons and services, market stalls, pop-ups and mobile trades. Its combination of free POS software, low-friction hardware, transparent flat-rate pricing and same-day funding is genuinely hard to beat below roughly $500k/yr in card volume. Square is less competitive as a pure online payment processor for anything sophisticated — Stripe wins on developer experience and Shopify Payments wins on ecommerce depth — but for omnichannel small businesses, Square is the correct default.

Best for

• Small US, UK, IE, CA, AU and JP retailers, hospitality operators and service businesses.
• Owners who want free POS software with no monthly fee to start.
• Mobile and pop-up sellers who need a card reader in a pocket, not a terminal on a countertop.
• Restaurants and cafes wanting integrated online ordering, KDS and loyalty out of one dashboard.

Not ideal for

• SaaS, marketplaces or subscription businesses — use Stripe.
• Serious ecommerce brands running Shopify already — Shopify Payments is a cleaner default.
• Higher-risk verticals or unusually large single transactions — Square's automated risk holds are noticeable.
• Businesses processing well above $500k/yr in card volume where interchange-plus pricing meaningfully wins.

Independent verdict

Square nailed the "free software + easy hardware + flat fees + same-day funding" formula for small businesses over a decade ago, and its steady expansion into online, Square for Restaurants, Square for Retail, Square Appointments, Square Online, Square Marketing, Square Banking (US) and Square Loans has turned it into a coherent SMB operating system. The trade-offs are that flat-rate pricing is not the cheapest above scale, and Square's risk engine has a well- documented history of freezing accounts on unusual volume spikes or category mismatches.

Payment processing model

Square is a merchant of record with full acquirer status in its supported markets. You sign one contract, get one dashboard, and Square handles the card-network relationships, PCI scope and settlement. Funds land in your linked bank on a rolling schedule.

Online and in-person payments

In-person: Square Reader (magstripe + contactless + chip), Square Terminal (all-in-one handheld with printer), Square Stand (iPad dock), Square Register (2-screen countertop system), plus Tap-to-Pay on iPhone / Android with no extra hardware.

Online: Square Online (free hosted site builder with checkout), Square Online Checkout Links (no-code payment links), embeddable Payment Links and eCommerce API. Sufficient for informational sites, restaurant online ordering and small stores; not competitive with Shopify or WooCommerce + Stripe for scaled ecommerce.

Transaction and international fees

US list pricing at time of writing: 2.6% + 10¢ for in-person card payments, 2.9% + 30¢ for online (Square Online, invoices, virtual terminal, ecommerce API), 3.5% + 15¢ for keyed-in / card-on-file, and 3.3% + 30¢ for Square Invoices paid by card. ACH via Square Invoices is 1% (min $1). International rates vary — UK is 1.75% flat for chip and PIN. Custom rates negotiable above roughly $250k/yr in Square-processed volume.

Pricing verified against squareup.com/us/en/pricing at time of publication. Check your local Square pricing page for market- specific rates.

Supported markets and currencies

Square operates in the US, Canada, UK, Ireland, France, Spain, Australia and Japan at time of writing. Payment acceptance is denominated in local currency in each market; cross-border acquiring is not a Square use case. Businesses primarily selling internationally should look at Stripe or Adyen.

Settlement times

Standard payouts to a linked US bank land next business day. Instant Transfer to eligible debit cards is 1.75% (US). Square Banking (US) offers an in-Square Checking account with instant deposits at no extra fee — a meaningful advantage for cash-flow-tight retailers.

Chargebacks and account holds

Square absorbs the chargeback fee — you pay no dispute fee, only the disputed amount if the case is lost. That is genuinely differentiated versus Stripe ($15) and PayPal ($20). Square offers Dispute Assistance and, for eligible transactions, Chargeback Protection up to $250 per month at no extra cost. Account holds and freezes on unusual volume patterns remain the most-cited seller complaint.

Recurring billing and subscriptions

Square Subscriptions supports recurring plans with tiered pricing and free trials. Reasonable for service businesses billing monthly memberships; not competitive with Stripe Billing for SaaS-scale subscription depth.

Invoicing

Square Invoices is one of the strongest free invoicing tools for small businesses. Unlimited invoices on the free plan; Square Invoices Plus ($20/mo US) adds custom templates, milestone billing and multi-package projects. Buyers can pay by card, ACH, Cash App Pay or in-person at checkout.

APIs and developer tools

Square's developer platform ships REST APIs for Payments, Orders, Catalog, Customers, Terminal, Bookings and more, with SDKs in Node, Python, Ruby, PHP, Java, .NET and Go. Sandbox environments, OAuth for third-party apps and webhooks are supported. Developer experience is functional but distinctly less polished than Stripe — Square's API story is a supporting act to its in-person hardware, not the headline.

Ecommerce and accounting integrations

Native accounting sync with QuickBooks Online and Xero. Deep ecommerce integration with WooCommerce, Wix, BigCommerce and Ecwid; Shopify integration is available but shallow (Shopify Payments is the preferred Shopify path). Marketplace payout reconciliation via Link My Books, A2X and Synder for accountant- grade ledger posting.

Fraud prevention

Square runs first-party ML fraud scoring on every transaction; you do not tune rules yourself. 3D Secure is applied automatically on applicable European transactions. Dispute Assistance walks sellers through evidence submission; Chargeback Protection (US, up to $250/ month) covers eligible fraud-coded disputes.

Reporting and reconciliation

Sales, Payment Methods, Items, Employees and Category reports are first-class citizens in the Square Dashboard. Export to CSV or sync to QuickBooks / Xero. For multi-location retail and hospitality, Square's native reporting is stronger than most SMB competitors and is a real reason to consolidate on the platform.

Suitability by business size

• Solo / freelancer: Tap-to-Pay on phone + free Invoices is a credible zero-hardware stack.
• SMB in-person: The default. Free software, transparent fees, next-day payouts.
• Mid-market retail / hospitality: Square for Retail / for Restaurants Plus ($60–100/mo per location) is competitive.
• Enterprise: Adyen, Toast (hospitality) or Lightspeed usually win. Custom Square rates possible above ~$250k/yr.

Security and PCI

Square is a PCI DSS Level 1 service provider. Using Square hardware or Square-hosted checkout keeps sellers in the narrowest possible PCI scope — a meaningful admin saving for small businesses without dedicated compliance staff.

Customer support

Phone support during business hours in every supported market (24/7 for higher-tier plans), plus in-app chat, community forum and comprehensive help centre. Support quality is well regarded by SMB standards — meaningfully better than PayPal, more accessible than Stripe below larger account thresholds.

Alternatives worth comparing

• Stripe — the online-first developer-led default for SaaS and marketplaces.
• PayPal — a wallet, not a POS. Offer it alongside, don't replace Square with it.
• Shopify Payments — the right choice if Shopify is your ecommerce platform.
• SumUp / Zettle — cheaper card readers for very small in-person volume in the UK/EU.

Our final take

Square is the right default for almost any small in-person US, UK or EU business. Free software, honest flat-rate pricing, next-day settlement, better-than-average support and a coherent ecosystem from POS to loans. Revisit only when your card volume grows past the point where interchange-plus pricing meaningfully wins, or if your business shifts online-first and you need Stripe's API depth.