0.99% vs 1.69% — Does SumUp's Ecosystem Justify the Extra Cost?

Picture two café owners in Copenhagen. Same block, same espresso machine, same Tuesday morning rush. One pays 0.99% on every card tap through flatpay. The other pays 1.69% through SumUp — for a payment app that also throws in a business bank account, an online store builder, and a loyalty program.

When both push €20,000 a month through their terminals, the first owner keeps an extra €140 a month. The second is quietly hoping the extra tools pay for themselves.

That's the core dilemma at the heart of this comparison, and it's one of the reasons buyers get stuck. flatpay is the fee disrupter that landed in Europe in 2021 and has been eating market share ever since with a dead-simple pitch: one flat rate, zero monthly costs, no fine print. SumUp, founded a decade earlier and now one of the continent's biggest payment fintechs, counters with sheer breadth — hardware, banking, invoicing, e-commerce, loyalty — all bundled into one account.

As of Q3 2026, both are excellent products. They just answer different questions. The question isn't "which is better?" — it's "what are you actually optimizing for?"

Quick answer: If your business is primarily in-person, based in a country flatpay serves, and processes more than €5,000 a month in cards, flatpay will save you real money with almost zero effort. If you need the full toolkit — online sales, business banking, loyalty, marketing tools — SumUp's higher per-transaction cost is effectively the price of convenience.

Quick Comparison Table

Feature-by-Feature Deep Dive

1. Transaction Rates & Fee Transparency

This is the battleground, and the math is brutal for SumUp.

flatpay charges 0.99% for every Visa and Mastercard transaction — debit or credit, consumer or business card, tap or chip. No monthly rental, no minimum volume requirement, no PCI compliance charges sneaking in later. American Express runs at a higher rate, the same way it does everywhere, and you'll see that clearly stated in your contract. There are no tiers to graduate through, no "prime" membership to juice your pricing. One number, on every invoice, forever.

SumUp's headline rate is 1.69% in most eurozone markets (and higher in some places — Ireland sits around 1.95%, and the US is at 2.65%). You can reduce that to 1.39% by paying €4.99/month for SumUp One, which is genuinely a good deal if you're processing more than ~€1,600 a month. But even at the discounted rate, you're paying roughly 40% more than flatpay per transaction.

Winner: flatpay, decisively. There's no volume threshold where SumUp's standard rates become cheaper. The only exception is if you're processing serious six-figure monthly volumes and negotiate custom enterprise pricing with SumUp — but that's a conversation most small businesses never get to have.

2. Hardware & In-Person Experience

SumUp's hardware lineup is the most diverse in the SMB space. The SumUp Air costs about €19 — effectively free — and turns your phone into a card reader. The Solo is a standalone terminal for €39. The WisePad 3 runs closer to €79 with a built-in keypad. And the SumUp Smart — an Android touchscreen with a receipt printer — lands around €149. Every device supports contactless, Apple Pay, Google Pay, and the Air even works with tap-to-phone on iPhones.

flatpay offers fewer devices but puts the money where it matters. Its flagship is a smart handheld terminal with a built-in receipt printer — the kind of durable, fast-printing device you genuinely want behind a busy bar. There's also a countertop terminal for retail and a tap-to-phone option through the flatpay mobile app.

You don't buy flatpay's terminal outright in most markets. You pay a deposit (typically €99–249 depending on the device), and that deposit is fully refunded after 12 months of consecutive use. That's a clever structure: it removes the upfront cost barrier while protecting the company from merchants who abandon the terminal after one slow season.

Winner: SumUp for range, flatpay for focus. If you need one terminal that just works for high-volume counter service, flatpay's hardware is arguably better built for the job. If you're running pop-ups, markets, and multiple formats, SumUp's cheap and varied lineup is hard to beat.

3. Reporting & Analytics

SumUp's dashboard has matured into a proper command center. You get daily and monthly settlement reports, split by payment method, device, and staff member. The "Sales" tab breaks down peak hours and average basket size. SumUp One adds accounting-friendly exports and integration with common bookkeeping tools. It's not Looker — you won't build custom BI dashboards — but for an SMB, it's genuinely useful.

flatpay keeps reporting simpler: gross and net sales, per-location breakdowns, tip totals (its hospitality features are genuinely thoughtful), and a clean daily summary. There's no dwell-time analysis, no heatmaps, no per-hour granularity. What flatpay does well is clarity — every figure ties directly back to the 0.99% rate, so your monthly statement is readable in about ninety seconds.

Winner: SumUp. If you run multiple revenue streams, staff shifts, and seasonal patterns, SumUp's analytics give you more signal. flatpay covers the basics well, but power users will feel the ceiling.

4. Ecosystem: Banking, Invoicing, E-Commerce, Loyalty

Here's where SumUp pulls ahead dramatically — and where flatpay is still building.

SumUp now runs a genuine all-in-one stack. The SumUp Business Account is a free European bank account with a Mastercard debit card, instant deposits, and envelope-style budgeting. SumUp Invoicing creates professional invoices with payment links and automatic reminders. SumUp Online Store lets you sell online without a Shopify subscription. SumUp Loyalty runs points programs, and SumUp Gift Cards give you a prepaid revenue stream that every restaurateur I talk to loves.

flatpay, by contrast, is a payment processor first and a product suite second. It has an invoicing tool with payment links, and those are genuinely well-executed — clean templates, automatic reconciliation back to the transaction ledger. There are e-commerce plugins for WooCommerce, Shopify, and a handful of EU shop systems. But there's no flatpay bank account, no store builder, and no marketing suite. You're expected to bring those from elsewhere.

Winner: SumUp, and it's not close. If you're currently paying separately for accounting software, an e-commerce platform, and a bank account, SumUp can consolidate several bills into one. That doesn't make the 0.99% rate difference disappear — it just makes it more defensible.

5. Multi-Store & Team Management

For the 15- and 50-seat scenarios, this matters more than the transaction rate.

SumUp supports multi-user accounts with roles and permissions — owner, manager, cashier — and you can tie each user to a device. Reporting can be filtered by store, user, or device, which is essential for franchise owners tracking staff performance. SumUp One bumps up the user limits and adds more granular permission controls, which is the right structure for growing teams.

flatpay supports multiple locations from one dashboard, and each location gets its own revenue tracking. Staff management exists but is leaner — you can issue logins to team members and track sales per location, but you won't find the same depth of role-based permissions or device-to-staff assignment.

Winner: SumUp, with a caveat. At five seats, flatpay is perfectly fine. At fifteen, it gets workable. At fifty stores, you'll feel the gap — but you'll also be saving roughly €2,500 a month in processing fees, which buys a lot of admin hours. That's the trade-off you'll wrestle with.

6. Payout Speed & Cash Flow

Cash flow is the quiet killer in the payments world.

Both providers deliver payouts on the next business day as standard. flatpay is slightly faster in practice in some markets — same-day settlement is available for early transactions depending on your acquiring bank — and there are no payout fees. What you see in your contract is what lands in your account.

SumUp has one notable advantage: instant payouts to the SumUp Business Account in seconds, for a small fee, or free for SumUp One subscribers in some markets. For a small retailer facing a payroll deadline, that's not a feature — that's a lifeline. On the flip side, SumUp's standard payouts can occasionally take an extra day around holidays, which is normal for the industry but worth knowing.

Winner: flatpay for transparency, SumUp for flexibility. If you never need same-day cash, flatpay's consistency wins. If you run on thin margins and tight payroll cycles, SumUp's instant option is a genuine differentiator.

7. International Reach & Multi-Currency

SumUp operates in more than 30 countries and lets you process in EUR, GBP, USD, and several other currencies — useful for border towns, cross-border e-commerce, and UK merchants.

flatpay is proudly European: Denmark, Germany, France, Italy, Spain, the Netherlands, Austria, and a growing list of EU markets. It's not available in the UK, and won't be soon — that's a deliberate focus strategy. For a British reader, this decision is already made.

Winner: SumUp. If your ambitions cross borders or continents, SumUp's local acquiring licenses and multi-currency support are meaningfully broader.

Pricing Face-Off: 5, 15, and 50 Seats

Let's make this concrete. I'll model three businesses, assuming each "seat" represents one staff member processing payments through their own login or terminal.

The pattern is relentless. At 15 seats, flatpay saves you €605–1,050 every single month. At 50 seats, it's the difference between €5,940 and €10,140 — over €50,000 a year in your pocket, without a single extra hour of work.

Now, value-per-dollar is where SumUp fights back. The SumUp One plan includes the business account, advanced analytics, and loyalty features that are individually worth €20–30/month. If you'd otherwise buy a CRM, a loyalty app, and a store subscription separately, you can reasonably offset €40–60/month of the fee gap.

But here's the honest math: even with that offset, a mid-sized business giving away €7,000 a year in extra processing fees would need to extract an enormous amount of value from SumUp's extras to justify it. For volume-heavy merchants, that's a steep price for features they may not fully use.

Winner: flatpay, at every seat count. The bigger you get, the louder this gets.

Integration Ecosystem

If your stack is your kingdom, this section matters more than the fee table.

SumUp has spent years building out its integration marketplace. There's a public REST API, SDKs for iOS and Android, and pre-built integrations with major POS systems, accounting platforms like Xero and QuickBooks, and e-commerce engines like Shopify. There's a Zapier integration, which means even non-developers can glue SumUp payments into their favorite tools — triggering invoices in FreshBooks, logging sales in Google Sheets, or pushing data into Slack.

flatpay is moving in the right direction but lags behind. They offer a Payments API for custom development, and their e-commerce plugins for WooCommerce and Shopify work as expected. But there's no app marketplace, no Zapier connector you can spin up in an afternoon, and no ecosystem of third-party partners building on top of flatpay. If you need something specific, you're either coding it yourself or asking flatpay's team nicely.

Winner: SumUp, comfortably. For merchants whose operations run on integrations, SumUp will plug into the existing stack in hours. flatpay will require a conversation with their engineering team first.

User Experience & Learning Curve

Both companies understand that their users are busy people, not fintech enthusiasts.

flatpay's app is refreshingly minimal. Open the app, tap "Charge," enter the amount, done — under ten seconds from pocket to payment. The onboarding is the fastest I've tested in the category: register, get approved, and receive the terminal typically within a few business days. There's no learning curve worth mentioning; if you've ever used an iPhone you can operate flatpay.

SumUp's app is denser — and that's both a feature and a flaw. You can accept payments, create invoices, check settlement reports, run loyalty campaigns, and peek at your business account balance from one dashboard. But that density means new users spend more time figuring out where things live. The home screen sometimes feels like a marketplace promoting products you haven't asked for. Long-time users find it familiar; newcomers can feel mildly overwhelmed in week one.

Winner: flatpay for speed-to-productivity, SumUp for depth. A new waiter gets trained on flatpay in five minutes. A new business owner finds more long-term value in SumUp's combined view of money coming in and going out.

Who Should Pick flatpay?

The volume-driven hospitality operator. Restaurants, cafés, bars, and bakeries processing €10,000+ monthly in card payments. At €20,000/month, you're saving €140 monthly just by switching rate cards. That pays for your hygiene inspections, your Spotify subscription, and a staff lunch every month.

The multi-location retail owner in continental Europe. If you're running three or more stores and comparing 15- and 50-seat scenarios, the annual savings are five figures. Spend those savings on a part-time bookkeeper and you're still ahead.

The "I just want payments" founder. You already have an accounting stack you love, an e-commerce platform you're happy with, and no interest in a neobanking relationship with your payment provider. flatpay does one thing and does it honestly.

The cash-flow-focused operator. flatpay's predictable 0.99% rate means your monthly statement is never a surprise. For businesses that plan budgets to the cent, that's quietly valuable.

Who Should Pick SumUp?

The all-in-one SMB owner. You're a small business selling both in person and online, currently managing two or three separate subscriptions for payments, banking, and storefront. SumUp consolidates all of that into one login, one payout schedule, one support relationship.

The UK or US merchant. flatpay isn't available in either market. If you're reading this from Manchester or Miami, SumUp — or a local equivalent — is your realistic option. That's not a judgment; it's geography.

The "everything is connected" operator. If your business runs on Zapier flows, accounting integrations, and marketplace apps, SumUp's ecosystem is vastly better documented and more turnkey.

The low-volume or seasonal micro-merchant. If you process €2,000 a month, the difference between flatpay and SumUp is about €14 a month. SumUp's €19 Air reader and flexible model are a better fit for a side business than committing to a smart terminal you'll barely use.

The Verdict

Stop comparing features. Compare your actual transaction volume against both rate cards, and the answer emerges on its own.

For the overwhelming majority of in-person, EU-based, volume-heavy merchants, flatpay is the rational choice — and the gap only widens as you grow. €150,000 a month in card volume means flatpay saves you between €600 and €1,050 monthly, every single month, with no offsetting sacrifice if you're happy using external tools for accounting, e-commerce, and banking.

SumUp remains the right call for a meaningful minority: businesses that genuinely use its consolidated ecosystem, merchants outside flatpay's footprint, and micro-merchants whose volumes are too low for the rate difference to matter. For those users, the convenience premium is defensible — just understand that you're paying it consciously each month.

If you fall between the two — mid-volume, lightly integrated, shopping both options — push both providers for a custom quote. SumUp will negotiate at volume. flatpay won't need to.

🏛️

📌 Editorial Takeaway: You aren't buying a payment terminal. You're buying a pricing structure for the next 24 months. Run your real card volume through both rate cards — monthly, not yearly — before you fall in love with any hardware. At €20,000/month, flatpay puts €1,680 a year back in your pocket. That's the down payment on your next big idea.

FAQ

1. Do both support Apple Pay, Google Pay, and contactless cards?

Yes. Both processors accept all major contactless methods, including Apple Pay, Google Pay, and physical contactless cards. flatpay charges the same 0.99% regardless of method. SumUp charges the same rate too — though it's higher to begin with.

2. Can I use flatpay if I'm not based in Europe?

No. flatpay serves a focused set of European markets. If you're in the UK, US, or anywhere outside their footprint, SumUp (or a local rival like Square or Stripe) is your option.

3. Does SumUp charge a monthly fee?

Only if you want one. The pay-as-you-go plan has no monthly fee but charges 1.69% per transaction. SumUp One, at about €4.99/month, lowers your rate to 1.39% and adds perks like instant payouts and advanced analytics. If you process more than €1,600/month, SumUp One is the obvious choice.

4. Which one pays out faster?

Both settle on the next business day as standard. flatpay has no payout fees and same-day settlement for early transactions in several markets. SumUp offers instant payouts to your SumUp business account for a fee (or free on SumUp One) — the closest thing to real-time cash flow you'll get without a merchant cash advance.

5. Is it hard to switch from SumUp to flatpay?

Not really. Neither locks you into a long-term contract, and flatpay's terminal deposit structure means no hardware debt if you leave. The heaviest lift is updating payment links, invoicing templates, and any invoicing software that references your old provider. Budget a weekend for the switch, not a month.