UK manufacturers managing bill of materials, production runs, and raw material purchasing need software that goes beyond standard inventory tracking. Katana suits small manufacturers from £129/month; Cin7 Core and DEAR handle mid-market complexity from £249-£299/month. MRP (material requirements planning) functionality -- not just stock tracking -- is the defining feature to test before committing to any platform.
Last reviewed May 2026
Manufacturing inventory management is a distinct discipline from retail or wholesale stock control. The core challenge is that finished goods stock depends on raw material availability, production capacity, and lead times simultaneously -- variables that a standard inventory system does not model. Getting this wrong in a manufacturing context means either tying up working capital in excess raw material stock or halting production lines because a single component is out of stock. This guide covers the software, processes, and compliance considerations specific to UK manufacturers, from artisan producers to mid-size discrete manufacturers supplying UK supply chains.
What Manufacturing Inventory Management Requires That Retail Does Not
The defining difference is the bill of materials (BOM). A BOM defines the precise quantities of every raw material, sub-assembly, and consumable required to produce one unit of a finished product. When a production run is confirmed, the system should automatically check raw material availability against the BOM, generate purchase orders for any shortfalls, and reserve the materials against the production order.
Material requirements planning (MRP) extends this further: it uses sales orders, demand forecasts, and current stock levels to calculate what needs to be purchased, in what quantities, and by when. A true MRP calculation accounts for supplier lead times, minimum order quantities, and production cycle times. Without MRP, manufacturers rely on manual re-order decisions that are consistently either too early (excess stock, working capital locked up) or too late (production stoppage).
UK manufacturers face additional compliance requirements that affect inventory management. Businesses supplying aerospace, defence, or medical sectors must maintain traceability records linking finished goods to specific raw material batches -- a requirement driven by sector standards including AS9100 (aerospace) and ISO 13485 (medical devices). Make UK, the manufacturers' organisation, has published guidance on traceability requirements that apply to UK supply chain participants. For most manufacturers, batch and lot tracking in the inventory system is the practical mechanism for satisfying these obligations.
MRP vs. Basic Inventory Software: What UK Manufacturers Actually Need
Not every manufacturer needs full MRP. The decision depends on production complexity, SKU count, and the cost of a production stoppage.
A small artisan food producer making five product lines from 20 ingredients, producing to order, can typically manage with basic BOM functionality and manual reorder decisions. A manufacturer with 200 finished goods SKUs, 500 raw material lines, multiple production lines running simultaneously, and 10+ active suppliers needs genuine MRP to avoid constant firefighting.
The practical test: if your production manager currently maintains a separate spreadsheet to track what needs ordering and when, and that spreadsheet requires updating daily, you need MRP. If production decisions are straightforward enough to make from memory or a weekly stock check, basic BOM software is adequate.
Make UK's annual Manufacturing Monitor consistently reports that UK SME manufacturers cite supply chain visibility and inventory management as top operational constraints. Businesses that invest in MRP-capable software report median stock reduction of 15-25% within 12 months, primarily through elimination of safety stock held as a buffer against poor visibility.
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Platform Comparison: Manufacturing Inventory Software for UK Businesses
| Platform | Best for | Monthly cost | MRP | Batch tracking |
|---|---|---|---|---|
| Katana | Small manufacturers, DTC | From £129 | Basic | Yes |
| Cin7 Core | Mid-market, multi-channel | From £299 | Yes | Yes |
| DEAR Systems | Manufacturing + wholesale | From £249 | Yes | Yes |
| Unleashed | Simple assembly, wholesale | From £279 | Limited | Yes |
| MRPeasy | Small discrete manufacturers | From £49 | Yes | Yes |
| Fishbowl Manufacturing | QuickBooks-integrated MFG | From £329 | Yes | Yes |
| Sage 200 | Mid-market UK manufacturers | Custom (typically £400+) | Yes | Yes |
Katana is the strongest entry point for UK small manufacturers, particularly those selling direct-to-consumer via Shopify or WooCommerce alongside trade orders. Its visual production scheduling board shows live material availability against open production orders, which is its primary differentiator at this price point. MRP is present but simplified -- it generates purchase suggestions but does not run a full capacity-constrained schedule.
MRPeasy is underused in the UK market relative to its capabilities. At £49/month for up to 10 users, it provides genuine MRP, shop floor data collection, and production scheduling that competes with platforms three times its price. The interface is less polished than Katana, but the functional depth for discrete manufacturers is superior.
Cin7 Core suits manufacturers who also wholesale and retail, needing one platform to manage the full product lifecycle from raw material to end customer. Its native Xero integration handles COGS and work-in-progress accounting automatically, which is a significant time saving for businesses paying an accountant to perform these entries manually.
For broader inventory platform context, see our best inventory management software UK guide.
UK Tax and Accounting Considerations for Manufacturing Inventory
Manufacturing inventory accounting is more complex than retail because of work-in-progress (WIP). At any given moment, a manufacturer holds three categories of stock: raw materials, WIP (materials in production but not yet finished goods), and finished goods. All three must be valued correctly for statutory accounts and for corporation tax purposes.
HMRC requires stock to be valued at the lower of cost and net realisable value, consistent with UK GAAP (FRS 102) for companies applying the small companies regime. For manufacturing businesses, cost includes not just raw material cost but also direct labour and a proportion of production overhead -- the full absorption costing approach. Most off-the-shelf inventory software does not handle overhead absorption automatically; this is typically calculated outside the system and entered as a manual adjustment at year end.
R&D tax credits are available for manufacturers undertaking qualifying innovation activities, including development of new manufacturing processes. The HMRC R&D relief for SMEs guidance is the primary reference. Inventory software that maintains detailed production records (work orders, materials consumed, labour hours) provides the documentation trail that supports R&D claims -- an underappreciated secondary benefit of good system hygiene.
FAQ
What is the difference between MRP and ERP for a UK manufacturer?
MRP (material requirements planning) is a planning engine that calculates what to buy and when based on demand, stock levels, and lead times. ERP (enterprise resource planning) integrates MRP with accounting, HR, CRM, and other business functions in one system. Most UK SME manufacturers benefit from MRP-capable inventory software integrated with separate accounting software, rather than a full ERP, until turnover exceeds approximately £5-10m.
How does batch tracking work in manufacturing inventory software?
When raw materials are received, they are assigned a batch or lot number (typically the supplier's batch reference or an internal number). When those materials are used in production, the work order records which batch was consumed. The finished goods inherit a traceability reference linking them to the input batches. If a quality issue emerges with a specific raw material batch, you can identify every affected finished goods batch and every customer who received it.
Does manufacturing inventory software handle sub-assemblies?
The better platforms (Cin7, DEAR, MRPeasy, Katana) support multi-level BOMs, where a finished product is assembled from sub-assemblies that are themselves manufactured from raw materials. This is essential for any product with more than one manufacturing stage. Single-level BOM support (one layer of ingredients or components only) is adequate for simple food producers or kitters but insufficient for electronics, furniture, or complex consumer goods.
Can I use manufacturing inventory software for job costing?
Platforms with work order functionality can provide a basic job cost report: materials consumed at standard cost, labour hours recorded against the order, and overhead allocation if configured. This is not the same as a full job costing system. Manufacturers doing high-value bespoke work (engineering, print, specialist fabrication) typically need a dedicated job costing platform integrated with their inventory system rather than relying on inventory software alone.
What are the UK import rules affecting raw material stock valuation?
Raw materials imported from outside the UK are subject to import duty at commodity-code-specific rates under the UK Global Tariff. Import duty paid is part of the landed cost of the goods and should be included in the raw material stock valuation. Most inventory platforms that handle landed costs allow duty to be allocated across units on a per-kilogram or per-value basis at goods receipt. Failing to include duty in stock valuation understates COGS and overstates gross profit.
How We Verified
Platform pricing and feature details were verified from published plan pages on vendor websites in May 2026. Make UK manufacturing data was referenced from publicly available Make UK Manufacturing Monitor publications. HMRC R&D tax relief guidance was checked on gov.uk. FRS 102 stock valuation requirements were confirmed against the FRC's published standard. No vendor paid for inclusion or positioning in this article.
