Square vs SumUp POS 2026: Which Low-Cost System Wins?

By Edward Ip, POS Systems Specialist | Last updated: August 21, 2026

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Square and SumUp both target small businesses that want simple, transparent payment processing. In 2026, the two companies overlap more than ever: Square now sells POS hardware and software to retailers and restaurants, while SumUp has expanded from mobile card readers to a full cloud POS with built-in marketing. The right choice depends on whether you value flexibility and a free starting price (Square) or a bundled, flat-fee approach (SumUp).

This head-to-head comparison covers pricing, features, processing fees, hardware, support, and use cases. POSadvice.com helps you compare POS systems; if you want personalized recommendations, use our free quote request tool.

Square vs SumUp POS: At a Glance

Pricing Breakdown

Square wins on entry price. The Square Free plan gives you a full POS, online store, invoicing, customer directory, and basic reporting at $0 per month. You only pay processing fees. Square Plus ($49/location/month) adds advanced inventory, team management, and 24/7 support. Square Premium ($149/location/month) adds custom pricing, scaled tools, and dedicated support.

SumUp does not offer a free full POS plan. Connect Plus starts at $199/location/month and Connect Pro at $289/location/month, both billed annually with a 12-month commitment. The higher price includes loyalty, automated SMS/email promotions, dedicated installation and training, and a kitchen display system. SumUp argues the bundled price is lower than buying Square POS + Square Loyalty + Square Marketing separately, which can add up quickly.

Processing Fees

For in-person payments, both Square and SumUp charge the same rate: 2.6% + 10¢. That is competitive for small-ticket sales but can be expensive for high-volume merchants, who may save money with interchange-plus providers such as Helcim.

Online and invoice fees differ. Square charges 2.9% + 30¢ for online transactions, while SumUp charges 3.5% + 15¢. For low average tickets, SumUp’s lower fixed fee can be cheaper; for higher average tickets, Square’s lower percentage can save money. Manual/keyed-in rates are identical at 3.5% + 15¢.

Features and Use Cases

Square strengths: A massive app marketplace, integrated payroll, banking, buy-now-pay-later, appointment scheduling, and restaurant-specific tools make Square a one-stop platform for many business types. Offline payments are supported for up to 24 hours, which is valuable at festivals, markets, and pop-ups. The free plan means you can test the system before committing.

SumUp strengths: Simplicity and bundled marketing. If you run a boutique, café, barbershop, or quick-service restaurant and want loyalty, text/email campaigns, and review generation without cobbling together apps, SumUp POS can reduce complexity. Dedicated onboarding is also included, which helps less tech-savvy owners get started faster.

Hardware

Square sells a wide range of hardware, from the $59 Square Reader for contactless and chip to full Square Register and Square Terminal bundles. SumUp sells compact readers such as the SumUp Solo and SumUp Terminal, plus iPad stands, cash drawers, and receipt printers. Both companies support iOS and Android tablets, but Square’s hardware catalog is broader.

Support

Square offers phone support on paid plans and a large online help center and seller community. SumUp provides U.S.-based POS and loyalty phone support from 9 a.m. to 9 p.m. ET, seven days per week, plus email support at [email protected]. If 24/7 support is important, Square Premium or Plus is the safer choice.

Pros and Cons

Square POS

Pros: Free plan, month-to-month pricing, huge app ecosystem, offline payments, integrated payroll/banking, strong restaurant tools.
Cons: Loyalty and marketing cost extra, support can be slow on the free plan, fees are flat-rate only unless you qualify for custom pricing.

SumUp POS

Pros: Flat monthly fee includes loyalty and marketing, dedicated onboarding, transparent processing rates, included KDS, simple interface.
Cons: No free plan, 12-month contract, smaller app marketplace, online processing fee is higher than Square’s.

Processing Cost Example: $25,000 Monthly Volume

To see how the two systems compare in real dollars, consider a quick-service café processing $25,000 per month in card sales with an average ticket of $10, or about 2,500 transactions. At 2.6% + 10¢, in-person processing fees would be roughly $900 per month on either Square or SumUp. The difference is in software cost: Square Free would add $0, while SumUp Connect Plus would add $199 per month. If the café also needs loyalty and email marketing, Square Loyalty and Square Marketing could add $60 to $100 per month, bringing the Square total to $960 to $1,000 per month—close to SumUp’s $1,099 all-in price but still slightly cheaper.

For a business with larger average tickets, Square’s lower online rate (2.9% + 30¢ versus SumUp’s 3.5% + 15¢) can create bigger savings. A retailer doing $30,000 per month in online sales with a $75 average ticket would pay roughly $1,020 per month in Square online fees versus $1,162.50 with SumUp.

Hardware and Implementation

Square’s hardware lineup is broader. The Square Reader for contactless and chip starts at $59, the Square Terminal is $299, and the Square Register is $799. SumUp’s hardware is more compact: the SumUp Solo is a popular all-in-one handheld, and the SumUp Terminal works as a countertop or mobile device. Both companies sell cash drawers, receipt printers, and tablet stands, but Square has more bundle options and faster availability in the United States.

Implementation differs too. Square is largely self-service, especially on the free plan. SumUp includes dedicated installation and training with both POS plans, which can reduce downtime for owners who are not tech-savvy. If you need a system running quickly with minimal hands-on configuration, SumUp’s guided onboarding can offset its higher price.

Contract and Flexibility

Square’s month-to-month model is a major advantage for seasonal businesses, pop-ups, and startups. You can downgrade from Plus to Free or cancel without penalties. SumUp requires a 12-month subscription for its POS plans, which makes it a better fit for established businesses with stable sales. The 12-month commitment also means you should test SumUp’s demo and card reader experience thoroughly before signing.

Which Should You Choose?

Choose Square if you want the lowest upfront cost, maximum flexibility, or if you run a business type that needs specialized features such as restaurant table management, payroll, or appointments. Choose SumUp POS if you run a single-location retail or food-service business and prefer a bundled monthly price that includes loyalty, marketing, and onboarding.

For deeper looks at each platform, read our Square POS Review 2026 and SumUp POS Review 2026.

Square vs SumUp POS 2026: FAQ