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Legacy ERP or Business Central: what staying on Dynamics GP is costing you
- August 3, 2026
- Posted by: Macy Lang
- Category: Migrations & upgrades
Many organizations are still running a legacy ERP system that, on the surface, seems to be doing its job. Dynamics GP is one of the most common examples: it still runs, invoices still get processed, and reports still get generated, so many CEOs, COOs, and finance heads treat that as proof the system is still fit for the business. But operational continuity is not the same as cost efficiency. The real cost of staying on Dynamics GP emerges long before the software fails. It appears in hosting bills, in workarounds your team has quietly built, and in hours nobody tracks because they are spread across the business. This is what staying on Dynamics GP is actually costing you, and what the alternative looks like.
Why staying on Dynamics GP costs more than it looks like
When Dynamics GP was first implemented, the cost was visible: license fees, implementation hours, training. That cost has been paid. What has not been paid yet is everything accumulating since.
The cost of staying on legacy ERP systems like Dynamics GP builds across five areas: infrastructure, staff time, integration, security, and access to skilled support. Each one just makes the system marginally more expensive and less capable than it was the year before.
There is also a fixed date attached to this calculation now. Microsoft has confirmed that mainstream support and updates for Dynamics GP end on December 31, 2029, so the cost of waiting is no longer open-ended. It has a deadline.
Mainstream support and updates for Dynamics GP end December 31, 2029.
The five hidden costs of an aging Dynamics GP environment
Five categories account for most of what gets underestimated.
- Rising hosting and maintenance spend. Aging servers, hosting contracts, and vendor maintenance fees tend to climb every renewal cycle, even as the system gains no new capability.
- Manual workarounds and lost staff time. When Dynamics GP cannot do something natively, someone builds a workaround, a spreadsheet, a manual reconciliation, that consumes real payroll hours no IT invoice ever shows.
- Integration limits with Microsoft 365, Power BI, and Copilot. These modern Microsoft tools are built cloud-native first, so connecting them to Dynamics GP typically requires custom middleware that limits the reporting and automation your finance team can actually use.
- Security and compliance exposure. That risk grows the longer Dynamics GP runs without a modernization plan. See what ‘end of support’ means for Dynamics GP for the specific Microsoft timeline.
- A shrinking pool of GP-skilled talent. Fewer consultants specialize in Dynamics GP each year as the Microsoft partner ecosystem shifts toward Business Central, which tends to mean higher rates and longer waits for the support you can still find.
What staying on Dynamics GP actually costs versus modernizing
Picture two cost curves. Staying on Dynamics GP tends to follow a rising curve, where maintenance, workarounds, and support costs creep up year over year with no ceiling. Modernizing to a cloud platform tends to follow a flatter, more predictable curve: a subscription cost that is easier to forecast.
A March 2026 Forrester Total Economic Impact study commissioned by Microsoft, based on organizations that migrated from legacy Dynamics platforms including Dynamics GP, found measurable ROI and cost reduction from moving to Business Central in the cloud.
Organizations that migrated from legacy Dynamics platforms, including Dynamics GP, to Business Central in the cloud saw measurable ROI and cost reduction.
Moving from Dynamics GP to Business Central
Dynamics 365 Business Central is not a hypothetical next step. It is where most Dynamics GP customers eventually land, built by Microsoft as the modern successor in the same product family.
If you are ready to see what that path looks like in practice, from data conversion to process redesign to change management, our Dynamics GP to Business Central migration guide walks through it step by step.
How sa.global helps
With roots going back to Dynamics GP’s earliest days, sa.global understands what Dynamics GP customers depend on and what a responsible migration path looks like. Its Microsoft-aligned migration frameworks are designed to reduce risk and minimize disruption to daily operations, which is where the benefits of upgrading from GP to Business Central become concrete rather than theoretical.
For organizations not ready to migrate yet, Managed Services can help keep the current environment stable in the meantime.
FAQs
What is the difference between Dynamics GP and Business Central?
Dynamics GP is an on-premises ERP nearing the end of Microsoft’s support lifecycle. Dynamics 365 Business Central is Microsoft’s cloud-based successor, built for real-time reporting and ongoing feature updates rather than periodic major releases.
Is Microsoft Dynamics GP being discontinued?
Microsoft has stopped selling new Dynamics GP licenses and set a defined end date for mainstream and security support. See what ‘end of support’ means for Dynamics GP for the specific dates.
Should every Dynamics GP customer move to Business Central?
Not immediately, but most Dynamics GP customers will need a modernization plan before support ends. Dynamics 365 Business Central is the natural next step for most, though timing depends on your current environment and risk tolerance.
How much does it cost to run Microsoft Dynamics GP?
There is no single figure, since it depends on hosting, customization, and support arrangements. What is consistent is that the cost tends to rise every year, across maintenance, workarounds, and increasingly scarce specialist support.
Data source
1 The Total Economic Impact™ Of Microsoft Dynamics 365 Business Central
2 Announcing End of Support for Dynamics GP
Macy Lang
Macy Lang is a Senior Business Manager at sa.global with over 10 years of experience in implementing Microsoft Dynamics 365 solutions. She specializes in business analysis, solution design, and project delivery for services-based industries. Macy works closely with the marketing team to convey the impact of connected technology on service-centric organizations. With deep expertise across trade and logistics, finance, and project accounting, Macy has been a part of several implementations and upgrades.