Shopify ERP integration: how it works and how to choose
What data to sync, three ways to connect Shopify to an ERP, how to choose an ERP, and where syncs fail. A practical guide for merchants and operations teams.
- 100+Shopify stores built
- Shopify-onlyD2C agency
- 2 daysWritten proposal, working days
- Fixed priceAgreed in writing
What it is
Short answer: An integration moves selected data between Shopify and your ERP automatically, using Shopify's APIs and webhooks, so staff stop typing the same numbers into two systems.
A typical order follows this path:
The middle step can be an app, an integration platform or custom code. It verifies the message, translates the data into the ERP's format and records the result.
When you need it
Short answer: You need it when manual work between systems starts to cause stock errors, late orders or slow accounting. A store with one location and simple books may not need it yet.
- Stock must stay accurate across several warehouses or sales channels
- Finance staff re-key orders, refunds or payouts into accounting software
- You oversell, or orders wait for someone to copy them into the warehouse system
- Month-end takes days because Shopify and the ERP never quite match
- You sell wholesale or B2B with pricing and invoicing rules that live in the ERP
What data to sync
Short answer: Orders usually flow from Shopify to the ERP. Stock levels and fulfilment status usually flow back. Decide the owner of each record before you build, because two systems editing one field causes overwrites.
| Data | Usually flows | Owner is often |
|---|---|---|
| Orders | Shopify to ERP | Shopify creates the order, the ERP holds the sales record |
| Inventory | ERP to Shopify, plus adjustments back | The ERP or warehouse system |
| Fulfilment and tracking | ERP or warehouse to Shopify | The ERP or warehouse system |
| Refunds and returns | Shopify to ERP, status back to Shopify | Shopify starts it, the ERP books it |
| Products and prices | ERP to Shopify, or managed in Shopify | Depends on how you merchandise |
| Customers | Either direction | Shopify, a CRM or the ERP, chosen once |
These are common patterns, not rules. Your setup may differ, for example when you manage prices in Shopify.
Three ways to integrate
Short answer: Use a prebuilt connector for standard flows, an integration platform when you connect several systems, and custom middleware when your rules go beyond what apps support.
| Option | What it is | Fits best when | Watch out for |
|---|---|---|---|
| Prebuilt connector or app | An app from the ERP vendor or the Shopify App Store that syncs standard data. | Your flows are standard and you want to start quickly. | Limits on custom rules, and subscription fees that continue. |
| Integration platform (iPaaS) | A hosted tool where you build workflows between Shopify and the ERP. | You connect several systems and want visual workflows. | A subscription plus the work of designing and monitoring each workflow. |
| Custom middleware | Software built for your rules that sits between Shopify and the ERP. | Your pricing, stock or approval rules go beyond what apps support. | More build effort, and someone must own it after launch. |
If you are unsure, list your data flows and special rules first. A connector that covers most of them is usually the fastest start, and you can add custom work for the rest. Our third-party integration guide covers how to judge an integration before you buy.
How to choose an ERP
Short answer: No ERP is best for every store. Choose by how well it handles your products, warehouses, tax, B2B rules and reporting, and by how good its Shopify connector is.
Merchants often evaluate systems such as NetSuite, Microsoft Dynamics 365 Business Central, SAP Business One, Odoo and Acumatica. We do not rank them, because the right one depends on your business. Compare them on these points:
- Products and stock: SKU volume, variants, bundles, batches and number of warehouses
- Money: multiple currencies, tax rules for each market you sell in, and payout reconciliation
- B2B: price lists, payment terms, invoicing and credit limits
- Connector quality: which data it syncs, how it handles errors and who supports it
- Total cost: licences, implementation, connector fees and the people needed to run it, over several years
Ask every vendor for a demo that follows one of your real orders from checkout to fulfilment and refund.
How the sync works
Short answer: Shopify sends webhooks when something changes. Your integration verifies them, ignores duplicates and updates the ERP. Because delivery is not guaranteed, a scheduled reconciliation job catches anything missed.
These points come from Shopify's developer documentation:
- Verify every webhook with the HMAC signature in the
X-Shopify-Hmac-Sha256header - Ignore duplicates using the
X-Shopify-Webhook-Idheader - Expect missed and out-of-order events: Shopify says delivery is not always guaranteed and ordering is not guaranteed, and suggests sorting with
X-Shopify-Triggered-Ator the payload'supdated_at - Reconcile on a schedule: Shopify recommends jobs that periodically fetch data, for example with
updated_atfilters, so your systems stay consistent - Respect rate limits: limits use a leaky bucket that varies by API and plan, and Shopify recommends backing off for about one second after a throttle error
Say Shopify shows 25 units and the ERP shows 23. A reconciliation job finds the difference, checks the event history, applies your source-of-truth rule, corrects one side and logs what it did.
Step-by-step plan
Short answer: Map the data, choose the option, connect safely, handle failures, reconcile, then test with real order scenarios before you go live.
Map the data and the owner of each record
List every data type that must move and decide which system owns it. Write the rule down.
Choose the integration option
Pick a prebuilt connector, an integration platform or custom middleware using the table above.
Set up Shopify access
Create the app with the GraphQL Admin API and give it only the permissions it needs.
Subscribe to the events you need
Use webhooks for orders, inventory and fulfilment changes instead of constant polling.
Transform and map the data
Translate Shopify fields into the ERP's structures, including SKUs, tax codes, locations and payment methods.
Handle failures
Retry after errors and throttling, ignore duplicates and log every result so someone can see what happened.
Add a reconciliation job
Compare the two systems on a schedule and correct differences by your source-of-truth rules.
Test, then launch
Test on a development store and a staging ERP with real order scenarios, then switch on production and watch it closely.
What drives cost and time
Short answer: The number of data flows, the ERP you use and how many custom rules you need set the cost and time. We confirm both in a written fixed-price proposal within 2 working days.
- How many data flows you need and in which direction
- How clean your product, stock and customer data is today
- Custom rules for pricing, stock allocation or approvals
- How many warehouses, currencies and sales channels are involved
- Ongoing fees for connectors or platforms, and who monitors the sync after launch
Tell us which ERP you use and what you want to automate, and we will scope it. See also our guides to inventory integration, CRM integration and multichannel selling. We work with brands in the US and UK too.
Frequently asked questions
What is Shopify ERP integration?
It is an automated link between your Shopify store and your ERP, so orders, inventory, fulfilment and finance data move without manual entry. The link uses Shopify's APIs and webhooks, together with an app, an integration platform or custom middleware that translates data between the two systems.
Do I need to integrate Shopify with an ERP?
You need it when manual data entry between systems starts causing stock errors, late orders or slow month-end closes. Common signs are several warehouses or sales channels, finance staff re-keying orders, overselling and hours spent reconciling spreadsheets. A store with one location and simple accounting may not need one yet.
What is the best ERP for Shopify?
No single ERP is best for every store, so choose by your requirements. Compare how each option handles your SKU and warehouse setup, currencies and tax, B2B pricing and invoicing, reporting, the quality of its Shopify connector and the cost over several years. Ask each vendor for a demo that uses your own order flow.
Should I use an app, an integration platform or custom middleware?
Start with a prebuilt connector if it covers your flows, and go custom only when your rules go beyond what apps support. An integration platform sits in the middle for stores that connect several systems. Custom middleware gives the most control but needs more build effort and an owner after launch.
Is webhook delivery reliable enough for orders?
Not on its own, because Shopify says webhook delivery is not always guaranteed. Shopify recommends reconciliation jobs that periodically fetch data using filters such as updated_at, so a missed event is caught and corrected. Verify the HMAC signature on each delivery and use the X-Shopify-Webhook-Id header to ignore duplicates.
How do API rate limits affect an ERP sync?
Shopify limits how fast an app can call its API, so a sync must back off and retry. Shopify uses a leaky bucket model where bucket size and restore rate vary by API and plan, and requests over capacity receive a throttle error. Shopify recommends backing off for about one second after being throttled.
How long does a Shopify ERP integration take and what does it cost?
It depends on your ERP, the number of data flows and how many custom rules you need. Scope drives both time and price. We confirm the timeline and a fixed price in a written proposal within 2 working days of your request.
Which system should be the source of truth?
Pick one owner for each type of data and write it down before you build. A common setup is Shopify owning the storefront and orders, while the ERP owns stock levels, accounting and fulfilment status. When both systems can edit the same field, decide which one wins so that updates do not overwrite each other.
Sources
Technical statements about webhooks and rate limits were checked against Shopify's developer documentation on 12 October 2026. Shopify updates its platform, so check the documentation before you build.
Planning to connect Shopify to your ERP?
Book a free 30-minute call, or ask for a free store audit. Tell us your ERP and what you want to automate, and we will send a written, fixed-price proposal within 2 working days.
