ERP sectorial

ERP for retail

Update, 6 October 2026. What now has a firm date is mandatory B2B e-invoicing: Order HAC/1028/2026, in force since 6 October 2026, has started the deadlines of Royal Decree 238/2026 (twelve months for businesses with a turnover above €8 million and twenty-four for everyone else, i.e. October 2027 and October 2028 by our calculation). Spain's Ministry of Finance has announced that it will postpone VeriFactu to October 2028 so that it converges with e-invoicing, but that change is not yet in the BOE (Official State Gazette): until it is published, the dates set by Royal Decree-Law 15/2025 remain in force (1 January 2027 for Corporate Income Tax filers and 1 July 2027 for everyone else). We will update this page once the regulation is published.

Broken stock, tills that don't reconcile with your website, labels printed by hand: the hallmarks of a store or chain growing without the right system. We implement the sector-specific ERP that unites POS, warehouse, purchasing, e-commerce and invoicing in a single flow — no duplicated data, no manual day-end close.

SectorCommerce · retail · fashion · short-chain distribution
ProfileSingle store or chain of 2–20 points of sale
IntegrationPOS · e-commerce · supplier · e-invoicing

Spanish retail has been under double pressure for years: customers compare prices on their phones while standing in the shop, and expect the online stock figure to be accurate. When the ERP is not designed for retail, the outcome is predictable — undetected stockouts, returns that never update the warehouse, and accounting that always arrives late. According to the GS1 Spain 'Retail Insights 2025' report, inventory desynchronisation between the physical and digital channels is the number-one problem cited by retail SMEs. This is not a people problem: it is a systems architecture problem.

At Summum Sistemas we have been accompanying SMEs and mid-market companies through management software implementations since 2017. In retail we work with solutions such as Sage 200, Microsoft Dynamics 365 Business Central and Odoo, choosing the platform based on the number of SKUs, the number of tills and the need to integrate with a marketplace or online store. What never changes is the method: prior diagnosis of the operational flow, sector-specific parametric configuration and real training for the shop team — not a PDF manual no one reads. The go-live includes the initial load of items, suppliers and price lists, and we are on-site for the first live day-end close. If your business sells spare parts with a high-rotation catalogue, we offer an ERP for spare parts built for that catalogue.

The Verifactu obligation (Royal Decree 1007/2023) also applies to retailers issuing simplified invoices: with effect from 1 January 2027 for companies subject to Corporate Income Tax and 1 July 2027 for other obligated parties (self-employed and individuals under personal income tax), the till or POS system must generate invoicing records compliant with Royal Decree 1007/2023, sent to the Spanish Tax Agency (AEAT) if the VERI*FACTU mode is chosen (RDL 15/2025). The ERPs we implement already include modules adapted to Verifactu through the manufacturer's responsible declaration, so retailers do not have to change software at the most delicate point in their trading season.

Point of sale

POS integrated with Verifactu.

At the till we implement Tpvsol, the POS from the TeamSystem family already integrated with Factusol, or the native point-of-sale module of Sage 200 and Business Central when that platform already runs the rest of the business. In all three cases the till is not a separate system: it decrements stock on every sale, closes against the accounts at day-end, and generates the invoicing record compliant with Royal Decree 1007/2023, sent to the AEAT if the VERI*FACTU mode is chosen.

If your business is a bar or restaurant rather than a shop, the till logic changes (menus, table orders, tips) and we have a dedicated ERP for hospitality page for that.

Chains and warehouses

Multi-site and warehouses.

For a chain of 2 to 20 points of sale, the ERP centralises the catalogue and price lists so that no store runs its own separate stock accounting. Purchasing is planned from a central warehouse or from the highest-turnover store, and the system proposes transfers between stores before raising a new supplier order when the stock already exists elsewhere in the chain.

Each store keeps its own till close and its own physical stocktake, but sales history, minimum-stock alerts and transfer traceability are shared across the whole chain — so whoever runs purchasing sees the group, not store by store.

Fashion retail

Fashion: sizes and colours.

Fashion retail doesn't sell items, it sells variants: the same garment in several sizes and colours, each with its own stock and its own barcode. We configure the variant matrix in the ERP so the till recognises the exact combination at the scanner and the warehouse shows the real breakdown by size and colour, not just the total for the item.

That also keeps sales and returns in order: you can apply a discount by season or product family without touching each item's price by hand, and a garment bought online can be returned in any physical store without breaking the till reconciliation.

Online channel

Connected e-commerce.

Stock, price and orders travel both ways between the ERP and the online store: a sale at the till also decrements what's shown as available online, and an online order decrements the physical warehouse. If your online store already exists, we connect it through our e-commerce–ERP integration service; if you don't have one yet, we build it from scratch with our bespoke online store service.

The practical result is what a customer notices: reserve online and collect in store, or return in store what was bought online, without the system losing track of where each unit actually is.

Before you choose

Retail ERP: what you actually need.

Not every shop needs a retail ERP. If you run a single point of sale, low volume, and the only thing you manage is the daily till, a well-configured POS is probably all you need: it handles payment, receipts and the daily close without the complexity of a full management system. A retail ERP starts to pay off once a second store appears, you need to transfer stock between points of sale, or the business needs a real financial back office — purchasing, accounting, treasury — that a standalone till simply doesn't cover.

During the initial diagnosis we tell you honestly which of the two situations you're in, even when the honest answer is that the POS alone is still enough for now.

Sales process

Retail ERP sales: from order to payment.

The retail ERP sales flow we implement isn't limited to the till receipt: it covers the customer order, the item reservation, the quote that turns into a sale, and payment — whether at the counter, on credit terms, or through the online store. Every step is logged against the same stock and the same customer record, so the shop team sees the whole order, not just the day's till line.

That removes the classic mismatch of an order jotted down in a notebook or a separate spreadsheet while the till and the warehouse carry on independently.

End customer

Loyalty and CRM.

Each customer's purchase history — what they buy, how often, at which store — is the data that makes loyalty possible without relying only on generic discounts. We connect the retail ERP to our CRM service so the shop team has the customer record to hand at the counter: points, loyalty card, ticket history and segmentation for targeted campaigns.

The result is that a promotion doesn't go out blindly to the whole customer base, but to the segment it actually matters to.

The ERP for retail process.

The process · four stages
01

Operations diagnosis

Over one or two days we map the real flow: how goods arrive, how they move between warehouse and shop floor, how the till works, what is already connected to the website. We identify bottlenecks and define the exact scope of the implementation.

02

ERP selection and configuration

We recommend the most suitable platform (Sage 200, Business Central or Odoo) based on volume, budget and integration requirements. We configure product families, channel price lists, cost centres per point of sale, and the POS module with its payment methods and day-end close routines. This is also where we set up the sales flow — order, reservation, quote and payment — so it is unified from day one.

03

Integration and data migration

We connect the ERP to the online store or marketplace where applicable, configure the EDI connector for suppliers that support it, and execute a clean initial load of items, stock, customers and suppliers — with cross-validation before going live.

04

Go-live and stabilisation support

We accompany the go-live in store: first tills, first replenishment order, first accounting close. During the following four weeks we resolve real-world usage incidents. At the end of that period the team operates the new system independently.

What is included

What ERP for retail includes.

The operational detail: what we deliver as part of the work and what we keep alive afterwards.

  • POS integrated with ERP

    The point of sale decrements stock in real time, synchronises with the product record and closes against the accounts with no manual intermediate step.

  • Multi-site stock management

    Unified inventory visibility across all points of sale and the central warehouse. Minimum-level alerts, automatic replenishment proposals and inter-store movement traceability.

  • E-commerce integration

    Bidirectional synchronisation of stock, prices and orders between the ERP and the online store (WooCommerce, PrestaShop, Shopify or proprietary platform). Online stock always reflects the actual warehouse position.

  • Purchasing and suppliers

    Purchase orders raised directly from the ERP, goods receipt matched against the supplier delivery note, and reconciliation with the invoice. EDI support for suppliers that issue in that format.

  • Verifactu and electronic invoicing

    Configuration of the Verifactu module in the ERP to comply with Royal Decree 1007/2023: invoicing records compliant with the regulation, sent to the AEAT if the VERI*FACTU mode is chosen.

  • Training and support

    On-site or remote training for the shop and administration team. Technical support during stabilisation and access to our ongoing support service after go-live.

Frequently asked questions about ERP for retail.

What is the difference between a POS and a retail ERP?

A POS manages the till: it sells, takes payment and closes the day. A retail ERP integrates that POS with the warehouse, supplier purchasing, accounting and the online channel. Without that integration, POS stock and warehouse stock diverge, and accounting always arrives late. The ERP eliminates that friction: every sale at the till updates the inventory and generates the accounting entry without manual intervention.

Do I have to change my till software, or can I keep what I have?

It depends on your current POS and whether it has an API or connector for the chosen ERP. In the initial diagnosis we evaluate whether integrating the existing POS is feasible or whether switching is more cost-effective. Many medium-sized chains end up consolidating on the ERP's native POS to simplify support.

How long does an ERP implementation take for a store or small chain?

For a single store or a chain of 2–5 points of sale, the typical timeline runs from 6 to 14 weeks from diagnosis to production go-live. The timeframe varies depending on the number of SKUs, integration complexity and the client team's availability for data-load and training sessions.

Does the ERP you implement already comply with Verifactu?

The platforms we work with (Sage 200, Microsoft Dynamics 365 Business Central, Odoo) include modules adapted to Verifactu through the manufacturer's responsible declaration required by Royal Decree 1007/2023 — there is no AEAT homologation or certified software list. During implementation we configure and verify that module so that records are generated and transmitted correctly to the AEAT.

Does the ERP handle sizes and colours for fashion retail?

Yes. We configure the size-and-colour variant matrix on top of the base catalogue, with its own barcode for each combination and independent stock. The till recognises the exact variant at the scanner, and the warehouse shows the real breakdown by size and colour, not just the total for the item.

Does Kit Digital fund the ERP?

Only if you already have a voucher granted: the Kit Digital calls have closed (Acelera Pyme) and Order TDF/39/2026 does not open any new application window. With a valid voucher, the «Process management» category funds ERP implementations for SMEs, and we check with you that the scope fits what it covers.

When do I need a full retail ERP, and when is a POS enough?

If you run a single till with low volume, a well-configured POS handles day-to-day operations without extra complexity. A retail ERP pays off once you manage several stores, need to transfer stock between points of sale, or want a real financial back office — purchasing, accounting, treasury — that a standalone till can't cover.

Can I keep my current till and add the ERP behind it?

In many cases, yes — if the till exposes an API or a connector compatible with the chosen ERP: we keep the till your team already knows and connect stock, accounting and the back office behind it. When the current till is closed and has no way to integrate, the more efficient option is usually to migrate the point of sale itself to the ERP's native POS module, so you're not maintaining two support paths in parallel.

How long does migrating the item catalogue to the new system take?

It depends on volume and on the quality of the source data. A catalogue of a few thousand SKUs with clean data (code, description, price, supplier) migrates in a matter of days. When there are size-and-colour variants, multiple channel price lists, or the data is split between the old till and loose spreadsheets, the up-front clean-up — not the technical load itself — is what takes the most time; that's why we treat it as its own project phase rather than a rushed final step.