No ERP fits a company perfectly out of the box, and this platform is no exception. The gap between what the product ships with and what your team actually needs is where extensions come in. We design, build and support extensions for Business Central that add exactly what is missing, without forking the product and without blocking your next update.
What Are Extensions in Business Central, and Why Use Them?
An extension is a self-contained app that adds or changes functionality in Microsoft Dynamics 365 Business Central. Under the extension model, your code lives in its own package beside the Base Application instead of inside it. The core code published by Microsoft stays untouched, so monthly Business Central updates and security updates install cleanly.
That one design decision is why properly designed extensions age well. New fields, new pages, new reports and new business logic all sit in a layer that upgrades never overwrite. Compatibility is validated before each release, and a per-tenant extension can be installed on a single Business Central tenant when a requirement belongs to one legal entity rather than a whole group.
GEM365 Custom Extension Development Service
Boost the functionality of Microsoft Dynamics 365 Business Central with extensions tailored specifically for your business. Using the AL language in Visual Studio Code, we create and customize features that enhance the core application while maintaining smooth updates and system performance.
- Custom Solutions: Build and modify objects like tables, pages and reports to meet your unique requirements.
- Updates: Our work is non-intrusive, so core updates don’t disrupt your customization.
- Test First: We refine and test everything in a sandbox before going live in production.
- Collaborative Development: We share source and collaborate with your team to keep the result efficient and scalable.
Extensions developed by GEM365 for D365 BC
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Business Central Add-ons and Industry-Specific Extensions We Build
Some needs repeat across every client, so we have already built and refined add-ons that we adapt quickly rather than start from scratch. Others are specific to a sector: a contractor in construction and an oil trading desk want very different things from the same ERP solution. Whichever way people spell it (add-ons, addons, or a single addon) the principle is the same.
Workflow and Approval Add-ons
Multi-step approvals that match how your organisation really signs things off: budget checks, delegation, board-level thresholds, and an audit trail that survives a review. These automate the chasing, so your controllers stop living in email.
HRMS, Timesheet and Job Costing
Timesheets, project cost tracking, equipment logs and payroll interfaces for markets where the standard payroll module doesn't apply. For EPC and project businesses we tie an HRMS feed back to job costing, so committed spend is visible while a project is running rather than after it closes.
Invoice Capture and Document Management (DMS)
Capture a supplier invoice, read it, match it to the purchase order and file the document against the posted entry. Pairing your ERP with a document management system or SharePoint removes a surprising amount of manual keying, and the automation pays for itself fastest in high-volume trading companies.
Power BI, Analytics and Reporting Tools
Where a page or a report isn't enough, we push data to Power BI, Azure services or third-party reporting tools such as Jet Reports, and surface the result back where your people already work, so nobody has to switch apps to see their numbers.
Developing Extensions with the AL Language in Visual Studio Code
Everything we deliver is written with the AL Language extension for VS Code, the same toolchain Microsoft documents on Microsoft Learn. AL is the application language behind the product: objects are declared in source files, compiled into an app package, and installed against a sandbox or a live tenant.
We follow Microsoft best practices when building extensions – GEM-prefixed object names and IDs, event subscribers instead of code modification, upgrade codeunits for data changes, and telemetry so failures are visible. Developing extensions this way costs a little more up front and saves a great deal on every upgrade afterwards.
Extensions for Canadian Businesses
Business Central includes a Canadian localization. It handles GST, HST, PST and QST setup, uses CAD as the local currency, and produces the reports the CRA expects. It does not know how your company works, and that is where our Canadian projects usually start.
The same requirements come up repeatedly. Companies selling or buying across the US border need multi-currency handling between CAD and USD that posts exchange adjustments correctly and lands customs and brokerage charges on the right items. Business Central has no Canadian payroll module, so we build the link between your payroll provider and the ERP, and labour cost reaches the right project or cost centre without manual entry. Cheques are still a normal way to pay in Canada, and our cheque and treasury extension exists largely for that reason. Where a client operates in Quebec or sells there, we translate the captions on every field, page and document we add so the French interface stays complete.
On data residency: Business Central online can run in the Canadian Azure regions, and our extensions run inside your tenant. Nothing we build sends data anywhere else.
Why Companies Choose GEM365 for Business Central Extensions
Expertise in the AL Language
Our team has deep, hands-on experience with AL and the platform itself, which shows up as fewer defects and faster turnaround.
Custom Solutions Built Around Your Processes
We tailor every build to your specific requirements rather than bending your operation to fit a generic tool.
Integration With Your Existing Setup
Our work fits the Business Central implementation you already have, minimising disruption and maximising what you get from it.
Ongoing Support
We maintain what we build, keeping it current and fully functional through every release.
Business Central Extension Development Cost
Cost depends on scope. A quote given before the requirement is understood is a guess, so this section explains what drives the number rather than stating one.
The main factor is how much new logic the extension contains. Adding fields to the item card and printing them on a report takes days. Changing posting behaviour, or building an integration that handles failures and retries, takes weeks of development followed by a full test cycle. Integrations cost more than most clients expect because the other system’s API, data quality and authentication all have to be handled, and none of that shows up in the first meeting.
Testing is included in every quote. Each extension is installed in a sandbox and tested against your data before it reaches production. A build that skips this stage tends to cost more later in support.
We work in one of two ways. For a well-defined add-on, we scope it and agree a fixed price. For larger modules, or requirements that are still being worked out, we bill time and materials against an agreed budget cap with regular reporting on spend. Both include deployment and a support period after go-live.
Two costs sit outside development. Publishing on AppSource adds Microsoft’s validation time and a small fee. Business Central licensing is separate from anything we build, and an extension does not change your per-user cost.
For a firm number, book a short scoping call. For a focused add-on we can usually quote within a few days.
Business Central Extensions FAQ
No. That is the entire point of the extension model. Because your code never touches the base application, Microsoft can ship updates without breaking what we built.
It depends on development type. For custom business logic we write for you, the source is yours, handed over in a repository you control.
A focused add-on is usually two to four weeks from scope to sandbox. A larger module for a new business line runs longer, and we break it into releases so you see value early.
Often, no. But we review the code, document what it does, and either repair it or plan a clean rebuild if the original was written against the old modification model.
