Inventory management software for UK retailers: 5 options compared on EPOS, VAT and warehouse needs

What to take away

UK retailers should shortlist inventory software by EPOS fit, VAT records, warehouse flow and first-year cost in GBP.
This comparison names five products and uses public information against a common checklist, not a testing claim or vendor ranking.
HMRC VAT registration and Making Tax Digital shape the records your stock system must keep.
UK GDPR applies to customer and order data held in stock software, so access and retention need a rule.

Start with EPOS integration, not the feature list

A UK retailer's stock file often sits behind a till, a card terminal and an online shop. If the inventory tool cannot read the same sale event, staff reconcile by hand. Ask for a live integration list and a named UK support route before a demonstration. Per-seat pricing varies, as how Atlassian, monday.com, Notion and Slack charge shows.

Zettle by PayPal, Clover and Vend are common UK EPOS systems. Vend is now Lightspeed Retail, so the Lightspeed entry covers Vend tills. Of the five, Shopify POS connects to Zettle by PayPal through a public app. Square for Retail, Epos Now and Unleashed are separate systems; ask each for a Zettle or Clover sync test.

EPOS integration is not a logo on a pricing page. It is the movement of stock, refunds and exchanges into one ledger. Test a return, a click-and-collect order and a damaged item before you sign. For warehouse fit, check picking notes, stock counts and multi-location transfers.

Five named options for UK retail

Best for

Lightspeed Retail: Shops with one or more tills
Epos Now: Independent shops and hospitality retail
Shopify POS: Retailers already on Shopify
Square for Retail: Small shops wanting quick setup
Unleashed: Wholesale and multichannel retail

EPOS link to test

Lightspeed Retail: Native sale, refund and stock sync; covers Vend tills
Epos Now: Built-in EPOS with stock control; ask for a Zettle or Clover test
Shopify POS: Online and till inventory sync; Zettle by PayPal app available
Square for Retail: Square POS with inventory tools; no native Zettle or Clover sync
Unleashed: Links to Xero and Shopify, not a till

Indicative UK pricing model

Lightspeed Retail: Quoted per store and module; entry tiers are usually in the low hundreds of pounds per month
Epos Now: Quoted per till and module; entry packages are often under £100 per month per till
Shopify POS: POS Lite free with a Shopify plan; POS Pro about £79 per month per location
Square for Retail: Free tier; Retail Plus about £79 per month per location
Unleashed: User-based tiers; extra warehouse features cost more

VAT and warehouse watchpoint

Lightspeed Retail: UK VAT setup; purchase orders, stock counts and multi-location transfers
Epos Now: Check VAT codes on refunds; multi-site stock, purchase orders and stock takes need a plan check
Shopify POS: Shopify Tax for UK VAT; POS Pro adds purchase orders, stock transfers and barcode scanning
Square for Retail: Free plan limited; Retail Plus adds purchase orders, barcode and stock counts
Unleashed: UK VAT reporting; multiple warehouses, assemblies, batch tracking and reorder points

The table is a decision aid, not a verdict. Score each option on the same evidence: a live EPOS test, a VAT return sample, a stock count and a support call. The option that wins leaves fewer manual journals.

EPOS to inventory ledger

Till records sale
Card terminal records payment
Online shop records order
Inventory tool reads same event
One stock ledger updated

Check VAT rules before you migrate stock records

VAT registration is a trigger, not an afterthought. HMRC's registration guidance explains when a retailer must register and what changes. Build the stock system around the VAT scheme you actually use.

VAT-registered businesses must keep digital records and use compatible software for Making Tax Digital. Your inventory tool should produce the figures your VAT return needs without a separate spreadsheet.

The scheme you choose changes what a stock record must hold. Here is how the three main schemes affect stock.

VAT scheme	Effect on stock records
Standard	VAT is due on invoice date. Stock records must show VAT on purchases and sales when invoiced. Stock valuation excludes recoverable VAT.
Cash accounting	VAT is due when payment is made or received. Stock records need payment status, not just invoices. Join below £1.35m turnover; leave above £1.6m.
Flat rate	You pay a flat percentage of turnover and cannot reclaim input VAT on stock, except capital assets over £2,000. Stock cost includes VAT. Join below £150,000 turnover; leave above £230,000.

Mixed-rate baskets, refunds and stock write-offs are where stock and VAT records drift. Run one month in parallel before you stop using the old process. For named products, check whether VAT codes survive imports from Lightspeed, Epos Now, Shopify POS, Square for Retail or Unleashed.

Data protection and security belong in the scorecard

Inventory software holds customer names, addresses and order histories. That makes it personal data under the UK GDPR. The ICO's guide to the UK GDPR sets out the principles your supplier must help you meet.

Ask where data is hosted, who can export it and how long it is kept after a contract ends. A stock tool that cannot answer those questions will fail a retail data audit. This applies to cloud systems such as Shopify POS, Square for Retail, Lightspeed Retail, Epos Now and Unleashed.

Five steps to test a shortlist

Map the EPOS stock file. List every field your till sends, then check the inventory tool can receive it without a manual edit.
Run a VAT sample. Take one month of mixed-rate sales and reproduce the VAT return in the new system.
Trial a full stock cycle. Receive goods, pick an order, process a return and count a shelf.
Check user permissions. Confirm who can adjust stock, approve write-offs and export customer data.
Cost the first year in GBP. Include licence, onboarding, hardware, integration work and staff time.

Pricing models and reorder workflows for UK retail

Inventory software is usually priced per user, per site or per order, so the same shop can pay very differently. Ask each supplier for a worked example in GBP across twelve months.

Public pricing signals differ. Shopify POS Pro has a per-location monthly fee, about £79 per location. Square for Retail has a free tier and Retail Plus at about £79 per location. Epos Now and Lightspeed Retail often quote by modules or tills. Unleashed publishes user-based tiers, with extra warehouse features costing more. Check current UK prices.

Reorder points, purchase orders and supplier reminders are workflow problems before they are software problems. UK SMEs can use workflow automation tools for UK SMEs for those handoffs.

A stock system that cannot trigger a reorder is a reporting tool, not control.

Common questions

Which inventory software works with UK EPOS systems?

There is no single list that covers every UK EPOS estate. For the five named here, ask for a live integration test with your till, online shop and returns process. A directory entry is not evidence.

Do I need Making Tax Digital compatible stock software?

VAT-registered businesses must keep digital records and use compatible software for Making Tax Digital. Your stock system does not have to file the return itself, but it must feed accurate figures into the process.

Is inventory software covered by UK GDPR?

Yes. Stock files hold customer and order data, so the UK GDPR applies. Ask where data is hosted, who can export it and how long it is retained after the contract ends.

How should a small retailer compare total cost?

Build a twelve-month total in GBP: licence, onboarding, hardware, integration work and staff time. Then compare that total with the manual work the tool removes. The lowest licence fee can lose on labour.