- When you build an asset for your own use, its cost sits in inventory but belongs in the fixed-asset ledger.
- Business Central's manufacturing and fixed-asset modules do not connect for this out of the box.
- The fix is to move the finished cost from inventory into fixed assets with a journal, so it can be capitalized and depreciated.
- This is a known, standard customization, not a reason to avoid the platform.
Tuesday morning brought a good question from the finance lead at a field-services company that builds its own service vehicles, the kind that catches a lot of teams off guard.
The company pulls parts from inventory, puts skilled people on the floor to assemble each truck, and a few weeks later rolls out a vehicle it'll use for eight years, valuable equipment that never spent a day for sale. The moment you say "we built it, and we're keeping it," you've landed in a situation that Dynamics 365 Business Central, Microsoft's enterprise resource planning (ERP) platform for small and mid-sized businesses, won't handle automatically. The fix is clean and repeatable.
Two modules that were never introduced
Business Central knows how to build things. Its manufacturing module lets you define a bill of materials (BOM), the list of components in a finished item, and a production order consumes those components and adds labor and overhead, leaving a completed item with a known cost in inventory.
It also knows how to own things. Its fixed-asset module tracks long-lived items the company keeps and uses, recording their cost, depreciating them over their useful life, and reporting their value on the balance sheet.
These two modules don't connect for this case. Manufacturing assumes you'll sell what you built, so it parks the cost in inventory; fixed assets assumes you bought the asset, so it waits for a purchase invoice.
Moving the cost with a journal
A journal entry moves that finished cost out of inventory and into the fixed-asset ledger, the standard treatment for a self-constructed asset. Business Central has every tool you need:
- Build the asset the normal way. Run the production order and post the labor, so Business Central knows the full cost (parts, labor, and any overhead) in inventory as a finished item.
- Take the item out of inventory at its full cost. Post a negative adjustment, or use an inventory journal, to remove the truck at the cost Business Central calculated.
- Capitalize that cost as a fixed asset. Create a fixed-asset record and post an acquisition entry equal to the cost you removed. The truck now lives in the fixed-asset ledger.
- Depreciate it over its useful life. Business Central depreciates it on whatever schedule and method your accountant uses, like an asset bought from a dealer.
The accounts for the inventory reduction and the fixed-asset acquisition should offset each other, so the move is cost-neutral the moment it happens. You're not creating new cost, you're relocating cost that already exists from one part of the balance sheet to another.
Why it's worth doing properly
The shortcut is to expense all the parts and labor as they get used and never capitalize the asset. It's wrong in both directions: it overstates costs the year you build the vehicle, then understates them every year after, because you skipped the depreciation that should spread the cost across the asset's life. The asset also never appears on the balance sheet, affecting everything from financial statements to insurance.
Done right, you get an accurate balance sheet, matched expenses, and a clean audit trail from raw parts to the asset.
A known customization, not a dealbreaker
If someone tells you Business Central "can't capitalize self-built equipment," that's not quite true. The bridge between the two modules is small and well-trodden, with no need to abandon the platform or bolt on an add-on. For a company that builds a few service vehicles a year, it's a minor setup that pays for itself the first time an auditor asks where a $90,000 truck came from.
Let's talk it through
If your business builds equipment it then uses itself, and you want it to flow cleanly from the shop floor to the balance sheet, we're glad to map out how it should work in Business Central. We start with the journal entry your accountant wants to see and work backward to the configuration that produces it. Reach out and we'll help.