Switching from SumUp to SEJR — without downtime.

The short answer

Moving from SumUp to SEJR is designed to happen without downtime. Your SumUp reader keeps running while we set up your SEJR terminal and, if you sell online, your checkout in parallel. You cut over on a single planned day. SumUp is a well-established European payments company and its readers are popular with small merchants, but a growing Danish business usually wants three things a pocket reader wasn't built around: Danish-language support, money the next banking day, and a price tailored to your actual turnover and card mix rather than one flat rate.

Why growing Danish businesses move on

SumUp is a European payments company popular for card readers with small merchants, largely because a reader is cheap to start with and priced as a flat per-transaction rate. That simplicity is right when you take a handful of payments a week. It becomes less of a fit once you have a fixed shop, a webshop, steadier volume and a bookkeeper who wants everything to reconcile.

Here is where a locally-tailored setup tends to pull ahead:

• Support in Danish, from Denmark. When a terminal acts up during Saturday trade, you want someone who knows the Danish card landscape. SEJR is based in Glostrup and you can reach us on +45 70 60 30 86.
• A tailored price instead of one flat rate. A single blended rate is easy to read but rarely optimal once your volume grows or your card mix shifts. SEJR prices to your turnover and card mix — see how our pricing works.
• Money the next banking day. Predictable payout timing makes cash flow and reconciliation calmer.
• Terminal, POS and online in one agreement. Instead of a reader plus separate tools, you get the terminal, the point-of-sale system and online payments under a single agreement and one point of contact.

None of this makes SumUp a bad product. It makes it a different product for a different stage.

What to check before you switch

SumUp typically runs on flexible, pay-as-you-go terms rather than a long lock-in, which usually makes leaving straightforward. Even so, spend ten minutes confirming these points so nothing surprises you later:

• Your own agreement. Read your terms and check for any hardware financing, add-on subscriptions or minimums you would need to wind down.
• Payouts and pending balance. Make sure any balance held in your SumUp account is scheduled to reach your bank before you stop using it.
• Card types and payment methods. Confirm SEJR covers everything you take today — Visa, Mastercard and Vipps MobilePay in the terminal and online.
• Your POS and webshop. Note how your point-of-sale system or webshop platform connects to payments today, so the new checkout can be slotted in cleanly.
• Product and receipt data. Export anything you want to keep — product lists, sales history — before you wind the old account down.

The timeline: notice, setup, first sale

Once you've decided to move, a typical process looks like this. It's not a promise; it's a realistic picture for a business with one shop, one webshop, or both.

1. Day 0
   You sign the new agreement. Provide your CVR number, turnover, typical basket, and whether you need a physical terminal, online checkout or both. We create your MID (merchant ID) with the schemes straight away. You keep using SumUp for now — nothing is switched off yet.
2. Day 1–2
   MID approval and hardware on the way. The schemes typically confirm within a day; some industries need extra documentation. Meanwhile we pack your terminal and prepare the online checkout link.
3. Day 2–3
   Technical setup. The terminal arrives pre-configured for your MID. Online checkout is typically switched by updating an API key or plugin in your POS system, your webshop platform or your CMS.
4. Day 3–4
   Test transaction. You make a real, small transaction on your own card. We review it, and reconciliation and payout are confirmed — with money arriving the next banking day.
5. Day 4–5
   You're live. Official go-live on SEJR. Only now do you stop taking payments through SumUp and wind the old account down. There is no gap where you cannot accept cards.

Recognise the shape of this from an acquirer switch? It's the same discipline. If you're also coming off a traditional acquiring contract, our guide on switching acquirer without losing a day covers notice periods and lock-ins in more depth.

What carries over from SumUp

A switch feels bigger than it is. Most of what matters to your day carries straight over, and the parts that change are cosmetic rather than disruptive.

• The way you take payments. Tap, chip and Vipps MobilePay all work as before — in-store through the terminal, online through checkout.
• Your product and sales data. Export your product list and sales history from SumUp before you close it, and keep the file for your bookkeeping.
• Your bank account. Payouts land in the same business account; only the sender name on the settlement changes.
• Your customers' experience. Customers won't notice a thing at the till — the same cards, the same phone-based payments.

What changes for the better: a Danish support line, next-banking-day payout, a price built around your numbers, and terminal, POS and online sitting under one agreement instead of a reader plus separate logins.

Checklist before you say yes

• ✓ I have read my SumUp terms and any hardware or subscription add-ons.
• ✓ I have exported my product list and sales history.
• ✓ I have confirmed any pending SumUp balance will reach my bank.
• ✓ I have confirmed SEJR supports my card types and Vipps MobilePay.
• ✓ I have spoken to my POS or webshop provider about the new checkout.
• ✓ I have a planned cut-over day, and I keep SumUp live until SEJR is proven.

Related

• How to switch acquirer without losing a single day
• Switching from Zettle to SEJR — without downtime
• How SEJR pricing works