Bramvia — Business Central Experts
Sage 50 to Business Central in the UK: when the desktop runs out, what migrates, and what it costs
Sage 50 is where most UK SMEs start. It stops fitting at multi-location stock, multiple companies, more than a handful of concurrent users, or when reporting means exports. What moves to Business Central, how MTD continues without a gap, the timeline and the cost in pounds.
Short answer: Sage 50 does the job for a single-site UK business with straightforward accounting and light stock. It runs out when the company has stock in more than one location, more than one legal entity, more than 5-10 concurrent users, purchase approvals, or reporting that lives in exports. Business Central is the natural step up for a Microsoft 365 company: one system for finance, sales, purchasing and warehouse, with Making Tax Digital built into the UK localization, Power BI included, and AI agents. Migration is 2-4 months — masters and balances move, history is archived — and typically costs £15,000-40,000 for a small company, plus licences from around £57 per full user per month (Microsoft's GBP list; confirm current pricing).
The signals
- Stock across sites, or lots and serials: Sage 50's stock is single-location and basic.
- Two or more companies to consolidate: separate datasets, manual consolidation.
- Concurrent users: performance and locking with more than a handful.
- Purchase orders with approvals and goods receipt: partial in Sage 50.
- Reporting built in Excel from exports every month.
- Integrations with a webshop, a WMS or a CRM done by CSV.
What migrates and what's archived
| Migrates | Archived |
|---|---|
| Chart of accounts (rationalised), VAT codes mapped to BC VAT posting setup | Historic transactions (Sage 50 read-only, or exported) |
| Customers and suppliers with terms and VAT numbers | Closed invoices and payments |
| Stock items with prices and opening quantities | Old bank transactions |
| Open sales and purchase invoices at cut-over | |
| Opening trial balance | |
| Fixed assets |
The chart of accounts is where UK migrations either go well or badly. Sage 50 nominal codes are numeric and flat; Business Central uses dimensions for department, cost centre and project. Mapping nominal ranges to a cleaner chart plus dimensions is the design work — and it's what makes Power BI worth having afterwards.
Making Tax Digital doesn't break
Business Central's UK localization files MTD VAT directly with HMRC — no bridging software. The cut-over happens at a VAT period boundary: last return from Sage 50, first return from Business Central. Two systems filing the same period is the classic migration mistake; plan the date around it. The full MTD setup.
Timeline and cost
| Profile | Project | Timeline |
|---|---|---|
| Single company, 5-15 users, standard processes | £15,000-30,000 | 2-3 months |
| Multi-site stock or two companies, 15-40 users | £30,000-60,000 | 3-4 months |
| With webshop, WMS or manufacturing | £60,000+ | 4-6 months |
Licences per user per month at Microsoft's GBP list — Essentials for most companies, Team Members for approvers and viewers. Each project part invoiced only after you accept it.
FAQ
Payroll? Sage 50 Payroll (or any UK payroll) stays and posts journals into Business Central. There's no UK payroll in Business Central itself.
Can we keep Sage 50 for lookups? Yes, read-only, for as long as you need. Most companies stop opening it within a year.
Do we need a UK-based partner? For workshops and training, local helps. For migration, development and integration, remote works — and we work UK hours. Contracts through our EU entity or, for international groups, whichever entity suits.
What about Sage 200? A separate guide — it's a different product and a different migration.
Outgrowing Sage 50? Free assessment, no commitment — we'll tell you whether it's time, and what the move looks like.