Finance
General ledger, accounts payable and receivable, and management reporting that doesn't need a spreadsheet rebuilt every month end.
✦ ERP systems
ERP systems for UK businesses that have outgrown spreadsheets
An ERP system brings finance, stock, orders and operations into one place instead of five spreadsheets and three logins. Some businesses need a standard product configured well. Others need something built around a process no off-the-shelf vendor has ever seen. We help you work out which, then deliver it.
✦ What it is
What an ERP system actually does
An ERP system (enterprise resource planning) is the software that runs the core of a business: what you sell, what you make or hold, what it costs, and what you're owed. Before an ERP, that information usually lives in a finance package, a stock spreadsheet, an order book and someone's head. An ERP system puts one version of each fact in one database, so a sales order, a stock movement and an invoice all agree with each other automatically.
The term covers a wide range of software - a small business running Xero plus a stock app is doing a lighter version of the same job as a manufacturer on a full Microsoft Dynamics 365 deployment. What matters is not the brand but whether the system actually reflects how your business runs.
✦ Modules
The modules that make up most ERP systems
Few businesses need every module. Most need three or four done properly rather than ten done badly.
Inventory and stock
What you hold, where, and its value - reconciled against what your accounts say you hold, which is rarely true without an ERP.
Sales and order management
Quotes, orders and fulfilment tracked from enquiry to invoice, visible to everyone who needs to see them.
Purchasing
Purchase orders, supplier records and goods-in matched against what was ordered and what was paid for.
Manufacturing / MRP
Bills of materials, works orders and material requirements planning for businesses that make things rather than just sell them.
CRM and customer data
Customer records and history shared with finance and operations, rather than living separately in a sales team's own tool.
✦ The decision
Buy, build or extend: how to choose
This is the question that matters more than which vendor you pick.
| Route | Best when | Watch out for |
|---|---|---|
| Buy off-the-shelf | Your processes are close to standard and speed to go-live matters | Paying for modules you'll never use, and bending your process to fit the software |
| Extend a standard product | The core (finance, ledgers) is standard but one part of your operation is genuinely unusual | Vendor add-ons that break on every upgrade, or a partner who won't touch the core code |
| Build bespoke | Your process is the thing that makes you competitive and no product represents it well | Higher upfront cost and a team accountable for delivery, not just licence renewal |
✦ Honest answer
When an off-the-shelf ERP is the right answer
We build bespoke software, so it would be easy to argue every business needs a custom system. That isn't true, and saying otherwise would waste your money.
If your finance, stock and order processes are close to how most businesses in your sector run them, a standard product - Xero, Sage, Odoo, NetSuite, Microsoft Dynamics 365 Business Central - will get you live faster and cheaper than a bespoke build, and it comes with an ecosystem of accountants, consultants and support that a one-off system doesn't.
The signal to look elsewhere is when you find yourself working around the software rather than through it: manual spreadsheets patching a gap the product can't fill, or a process you've changed to suit the vendor rather than your customers. That's the point at which extending or building starts to earn its cost back.
✦ Before you commit
Questions worth answering before choosing an ERP route
- Which of our current processes are genuinely unusual, and which just feel that way because we've never seen the alternative?
- How clean is our existing data, and who is responsible for cleaning it before migration?
- Who owns the system after go-live - an internal team, the vendor, or a development partner?
- What does it cost to change the system in year three, not just to buy it in year one?
- Does this system need to talk to anything else - a website, a warehouse scanner, a bank feed?
✦ By sector
ERP systems for specific industries
The core modules are similar everywhere. What differs is which ones matter most and how they need to work together.
Manufacturing
MRP, works orders and shop-floor data alongside finance and stock.
Construction
Job costing, CVR and subcontractor control instead of standard stock modules.
Finance-led businesses
Multi-entity ledgers, consolidation and audit-ready reporting.
Retail
Stock across channels and locations tied to a single sales and finance view.
✦ Further reading
ERP guides on the Haystak insights hub
If you're still deciding whether you need an ERP system at all, these cover the questions we're asked most: [what does an ERP system cost](/insights/erp-system-cost), [ERP for small business](/insights/erp-for-small-business), [ERP vs CRM system](/insights/erp-vs-crm-system), [real ERP system examples](/insights/erp-system-examples), and [MRP vs ERP](/insights/mrp-vs-erp) if you manufacture.
✦ Questions we get asked
ERP system questions
What is an ERP system in simple terms?
Software that holds one version of the truth for finance, stock, orders and operations, instead of that information being spread across separate spreadsheets and tools that disagree with each other.
How much does an ERP system cost?
It depends on the route: licence and configuration for a standard product, or a build fee for something bespoke. There's a full breakdown in our guide to [ERP system cost](/insights/erp-system-cost), and a real number only comes from a scoping conversation.
Is an ERP system the same as accounting software?
No. Accounting software covers the ledger. An ERP system usually includes accounting but also stock, orders, purchasing and sometimes manufacturing or CRM, so those areas share data with finance instead of being reconciled by hand.
Should a small business get an ERP system?
Often yes, in a lighter form - see our guide on [ERP for small business](/insights/erp-for-small-business). The trigger is usually spreadsheets that no longer agree with each other, not a specific headcount.
What's the difference between MRP and ERP?
MRP (material requirements planning) is the manufacturing-specific piece: bills of materials, works orders and scheduling. ERP is the wider system that MRP usually sits inside. We cover this in [MRP vs ERP](/insights/mrp-vs-erp).
Can you build a bespoke ERP system?
Yes. Where a standard product's assumptions don't fit your process, we build the specific modules you need - often alongside a standard finance package rather than replacing it entirely.
Talk to us about your ERP route We'll tell you what we'd build.
Tell us how your business runs today and we'll give you an honest view on buy, build or extend - before you sign anything.
No pitch deck · We map your process · You own the software