Choosing an ERP for e-commerce: a practical guide

At some point, most online stores outgrow the combination of spreadsheets, an accounting system and the built-in tools of the store platform. Orders, stock, purchasing, accounting and reporting start living in disconnected systems, and someone on the team spends real time every week reconciling numbers that should already have matched. That is usually the signal that it is time to look at an ERP system (enterprise resource planning): software that ties finance, stock, purchasing and order data together in one place.

Choosing the wrong ERP, or implementing the right one badly, is a genuinely expensive mistake: expensive in licence and implementation cost, and far more expensive in the operational disruption of switching again one or two years later. This guide goes through how to think about the decision.

1. Be clear about why you actually need an ERP

Before you compare vendors, write down the concrete problems you are trying to solve. Common triggers for e-commerce businesses are:

• The stock figures in the store platform do not match what is actually in the warehouse.
• Your accountant is keying in order and sales data by hand that already exists somewhere else.
• You sell in several channels (online store, marketplaces, wholesale) and have no combined view of stock or margin across them.
• You spend a disproportionate amount of time on manual reconciliation, purchasing decisions or monthly reporting.
• You plan to scale internationally, add more warehouses, or hire more people who need reliable, shared data.

An ERP system is not a fix for a broken process. It will just run a broken process faster and with better visibility into how broken it is. Fix, or at least document, your core processes (order to cash, purchase to pay, returns) before you evaluate systems, not afterwards.

2. Decide what "must integrate" actually means for you

For an online store, the ERP system rarely stands alone. The value comes from how well it connects to the rest of your toolset. Map out specifically what has to talk to what:

• Your store platform (Shopify, WooCommerce, Mystore or similar): orders, products and stock must sync reliably, ideally close to real time.
• Your shipping and carrier setup: order status should flow both ways between packing and the ERP, so that stock levels and order status stay correct without manual updates.
• The accounting: this is often the real centre of gravity in an ERP decision. If the ERP and the bookkeeping live in different systems, someone is stuck with double entry.
• CRM and marketing tools: less critical for daily operations, but worth checking if you rely on customer or order data for marketing automation.

Ask every vendor for concrete, working examples of the integrations you need, not just a slide claiming "seamless integration". A short reference call with an existing customer with a similar setup is worth more than a demo.

3. Weigh cloud against on-premise, and total cost

Most new ERP implementations today are cloud-based, and for good reason: lower upfront cost, automatic updates, and easier remote access for distributed teams. But "cloud" is not automatically cheaper once you count the whole picture. When you compare options, look at:

• Licence or subscription cost per user, and how it scales as you add staff.
• Implementation cost: data migration, setup and training are often underestimated and can exceed the software cost itself in the first year.
• Integration cost: whether connections to the store and shipping systems are included, or require custom development.
• Ongoing support and maintenance: who do you call when something stops in a busy sales period?

One option Norwegian companies often consider is Visma Business NXT, a cloud-based ERP system built for the Norwegian market with good local compliance and accounting support. It is a solid match for many growing online stores, especially if you want the ERP and your accounting partner on the same system. But it is one option among several, and the right answer genuinely depends on size, complexity and your existing toolset. Holio is a Visma Business NXT partner and can help assess whether it fits, as part of an honest, needs-driven evaluation.

4. Build a shortlist and test it against real scenarios

Rather than comparing feature lists, test a small number of selected systems against your actual scenarios:

1. Run a test order through the whole flow, from checkout via packing to the accounting voucher.
2. Run a return through the system and see how many manual steps it takes.
3. Check how stock levels update in two sales channels at the same time.
4. Pull a simple margin or profitability report and see how much manual adjustment it needs.
5. Ask what happens when a sync fails: can you see it, and can you fix it without help from support?

This kind of hands-on testing exposes real friction that a sales demo tends to skip past.

5. Plan the implementation, not just the purchase

The system you choose matters less than how well it is implemented. A middling ERP system implemented carefully, with clean data migration and well-trained staff, will outperform an excellent ERP system rushed into production with dirty data and no training. Before you sign anything:

• Confirm who is responsible for data migration, and how historical orders, stock and customer data will be cleaned and mapped.
• Set a realistic go-live date that avoids your peak season. Never launch a new ERP system right before Black Friday.
• Plan a period of parallel running where the old and new systems run side by side, if volume allows, to catch discrepancies before you depend fully on the new system.
• Budget time for staff training, not just system setup.

6. Involve your accountant early

Your ERP choice has a direct, lasting effect on how efficiently your books can be closed every month, so involve whoever handles your accounting in the decision from the start, not after the contract is signed. If you work with an external accounting agency, ask them directly which systems they support well and which they have seen implemented badly. That kind of practical experience is hard to find anywhere else. Holio Accounting is opening soon for e-commerce clients and will work on exactly this kind of system decision, alongside our order and shipping platform for the operational side.

A short checklist before you decide

• Have you documented the actual problems you are solving, not just "we need an ERP"?
• Does it integrate reliably with your store platform and shipping setup, verified with real examples?
• Have you calculated total cost including implementation and integration, not just the licence?
• Have you tested it against real order, return and reporting scenarios?
• Is your accountant or accounting partner involved in the decision?
• Is the go-live date set outside your busiest sales period?