Microsoft Dynamics GP Migration Guide · Updated 2026 

The Definitive Guide to 

Microsoft Dynamics GP Migration 

Microsoft Dynamics GP’s end-of-life clock is running out. This guide covers every deadline, every decision, and exactly why Acumatica is the right destination for growing businesses — not just the Microsoft-recommended one. 

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Migration FAQ

Apr 2026

New GP subscription license sales ended

2029

All product support & tax updates end 

~30K

Businesses still running Dynamics GP today

9-18

Months: typical ERP migration timeline

OVERVIEW

Microsoft Dynamics GP Is Being Sunset. Here's What That Means for Your Business.

If your business runs on Microsoft Dynamics GP — formerly known as Great Plains — you are managing a product that Microsoft is actively winding down. This isn’t a rumor or a distant possibility. The deadlines are set, the license sales are stopping, and the countdown to unsupported software is underway.  

For the roughly 30,000 businesses still running GP today, the question isn’t whether to migrate. It’s when, where, and with whom. This guide was written to help CEOs, CFOs, IT Directors, and Operations leaders answer all three — with clear information, honest comparisons, and a practical roadmap for what comes next.  

What you won’t find here is a reflexive push toward Microsoft’s own recommended successor. Most migration content on this topic steers GP users toward Dynamics 365 Business Central by default. We believe GP users deserve to know the full picture — including why many companies making this move are choosing Acumatica instead, and what the differences actually mean in practice. 

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The GP Sunset Timeline: Every Deadline You Need to Know

Microsoft has published a clear, and already-in-motion, end-of-life schedule for Dynamics GP. Here is every critical date and what it means for your organization: 

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Where are you on the timeline?
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April 1, 2025 PASSED
Sales of new Dynamics GP perpetual licenses ended. Existing perpetual customers retain their licenses but cannot add new ones.
April 1, 2026 NEW MICROSOFT GP SALES ENDED
Sales of new Dynamics GP subscription licenses ended. The last pathway to new GP licensing closes. No new GP customers can be onboarded after this date.
📍 You Are Here ACT NOW
Now is the time to evaluate your ERP options. Start by identifying your must-haves and nice-to-haves — the features, integrations, and capabilities your business can't live without. The right ERP partner will help you map those requirements to a platform that fits both your operations and your timeline.
Before December 31, 2026 CHOOSE NEW ERP PLATFORM
Avoid the cost of waiting — the cost to migrate off Great Plains begins to accrue technology debt. Don't wait to choose a new platform.
Q1 2027 BEGIN IMPLEMENTATION
Microsoft Dynamics GP migrations typically take 9-18 months. Don't delay getting your project underway with the right Acumatica Partner.
2027 - 2028 COMPLETE MIGRATION
Get ahead of the Great Plains migration rush. This helps avoid delays in project start dates and ensures your business is first in line to modernize.
December 31, 2029 HARD STOP
All product enhancements, regulatory (tax) updates, and technical support end. After this date, GP will no longer receive payroll tax table updates, compliance fixes, or any functional improvements. Running GP past this point creates real legal and operational risk.
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The window to migrate on your terms — not under deadline pressure — is right now. Every quarter of delay narrows your options and increases both cost and risk. 

30 years of ERP experience
We've Been in Your Shoes. Here's What We Know.
Our team has been working with Dynamics GP since 1997. These aren't talking points — they're observations from decades of hands-on ERP consulting across hundreds of mid-market implementations.
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On Microsoft's ERP fit
"ERP was never a natural fit for Microsoft's go-to-market model. Mid-market ERP requires relationship-driven, industry-specific selling and long-term customer success — not high-volume, standardized software."
On switching to Acumatica
"Acumatica immediately felt intuitive coming from a Dynamics GP background. Information is easy to locate, workflows are logical, and the platform's integration with Excel, Word, and Outlook is best-in-class."
On Business Central
"In practice, Business Central felt far more like a rebrand of NAV than a purpose-built cloud ERP — resulting in a solution that is harder to learn and, too often, harder to implement successfully."
On GP's legacy
"What stood out immediately about Great Plains was how quickly you could become productive. The software was straightforward to learn and support was truly exceptional — before Microsoft acquired it."
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Frequently Asked Questions

GP migration
Microsoft Dynamics GP has a phased end-of-life schedule. Sales of new perpetual licenses ended April 1, 2025. Sales of new subscription licenses end April 1, 2026. All product enhancements, regulatory updates, and technical support — including payroll tax table updates — end December 31, 2029. After that date, running GP creates real legal and operational risk.
A typical GP-to-cloud ERP migration takes 9 to 18 months depending on the complexity of your data, customizations, and integrations. Companies that begin evaluating in 2026 are in the best position to complete migration before the 2029 hard stop without being rushed.
After December 31, 2029, Microsoft will no longer release payroll tax table updates, compliance fixes, or any functional improvements for Dynamics GP. This means your software will fall out of regulatory compliance, creating significant legal and financial risk for your business.
Most GP users are evaluating either Microsoft Dynamics 365 Business Central or Acumatica. While Microsoft typically recommends Business Central, many GP users find Acumatica a more intuitive fit — particularly because its workflow and data navigation model more closely resembles GP, reducing the learning curve and implementation risk.
Migration costs vary based on company size, number of users, data complexity, and required customizations. Most mid-market GP migrations range from $50,000 to $250,000+ depending on scope. Cloud 9 ERP offers a free consultation to assess your environment and provide an accurate estimate.
Acumatica
Acumatica is a cloud-based ERP platform built for mid-market businesses. It provides modules for financial management, distribution, manufacturing, field service, retail, and project accounting — all in a single, integrated system accessible from any device.
Acumatica was built as a cloud-native platform from the ground up, while Business Central is largely based on Microsoft's legacy NAV product. Acumatica offers unlimited user licensing (you pay by resource consumption, not per seat), a more intuitive interface for GP users, and faster implementation timelines. It also has stronger industry-specific modules for manufacturing, distribution, and field service.
Acumatica implementations can often be completed in 6-9 months for standard configurations, and 9-18 months for more complex setups. Cloud 9 ERP offers a Swift Implementation Program designed to get customers live in 90 days — See if you qualify for Swift.
Yes — Acumatica is widely recognized as one of the strongest ERP platforms for manufacturing and distribution. It includes native modules for discrete manufacturing, process manufacturing, warehouse management, and multi-location inventory — purpose-built for these industries without requiring third-party add-ons.
Working with Cloud 9 ERP
Cloud 9 ERP Solutions is a top Acumatica Gold Certified Partner serving businesses across the United States and Canada. Our consultants are based coast to coast, bringing local expertise and national reach to every ERP implementation. Our team has been consulting, implementing, and supporting business software for over 30 years, specializing in helping mid-market businesses migrate from legacy systems like Microsoft Dynamics GP to modern cloud ERP platforms.
Cloud 9 ERP has direct, hands-on experience with Dynamics GP. We understand how GP users think, how GP data is structured, and what it takes to migrate successfully without disrupting operations. As an Acumatica Gold Certified Partner, we bring both deep product expertise and a structured migration methodology to every engagement.
Getting started is simple. Contact Cloud 9 ERP to schedule a free, no-commitment consultation. We'll assess your current GP environment, discuss your business requirements, and provide a clear roadmap and timeline for your migration. There's no pressure and no obligation — just honest guidance from a team that has been doing this for decades.