Choosing a practice management and finance platform is one of the most consequential technology decisions a firm will make. Get it right and you have a foundation that supports growth, improves profitability and enables better client service for years. Get it wrong and you are locked into a system that constrains the practice and requires significant effort to unpick.
For UK accountancy firms, the two platforms that come up most consistently in this conversation are Sage and Microsoft Dynamics 365 Business Central. Both have real strengths. The right choice depends on the specific needs, scale and ambitions of your practice.
This comparison is written from the perspective of a practice evaluating the two options seriously. It covers the areas that matter most to an accountancy firm, rather than a generic feature-by-feature breakdown.
Practice Management Depth
Sage has long been positioned as a finance and accounting tool, and for practices using it primarily for their own accounts or for client bookkeeping services, it works well within those parameters. It is familiar, widely understood in the profession and relatively straightforward to implement.
Dynamics 365 Business Central operates at a different level of depth. As an ERP platform rather than a standalone accounting tool, it connects financial management to project management, time recording, billing, resource planning and business intelligence in a single, integrated system. For practices that want to manage the full operational picture of their firm, not just the ledger, Business Central provides that capability natively.
If your practice has outgrown a standalone accounting tool and needs a platform that reflects how a modern firm actually operates, Business Central is the more substantial foundation.
Client Relationship and Pipeline Management
This is the area where the two platforms diverge most clearly. Sage is a finance system. It does not include CRM capability, and practices using it for client relationship management are typically doing so through a separate tool or through informal processes.
Dynamics 365 Customer Engagement, which forms part of the EdgeBooks accelerator alongside Business Central, provides a purpose-built CRM that connects directly to the financial system. Every client relationship, every opportunity, every proposal and every communication is visible in the same platform that manages billing and operations. For practices serious about business development and client retention, this integration is significant.
Microsoft 365 and Copilot Integration
Most accountancy firms already use Microsoft 365 for email, documents and collaboration. This is where the Dynamics 365 and Business Central ecosystem has a decisive advantage.
Because both sit within the Microsoft technology stack, the integration is native. Outlook, Word, Excel, Teams and SharePoint connect directly to Dynamics 365 without the need for middleware or manual data transfer. Client emails appear alongside CRM records. Documents are stored and retrieved from SharePoint. Meeting notes are captured in Teams and linked to client files.
Microsoft Copilot, which is embedded across Microsoft 365, also connects directly to the data held in Dynamics 365 and Business Central. This means AI-assisted drafting, summarisation and analysis draws on your actual client and practice data, not generic information. Sage does not offer this level of integration with the Microsoft environment.
Scalability and Complexity
Sage performs well for smaller practices with relatively straightforward requirements. As a practice grows, adds service lines, takes on international clients or begins to operate across multiple locations, the limitations of Sage as a foundation tend to become more apparent.
Dynamics 365 Business Central is designed to scale. The platform handles multi-currency, multi-entity and multi-location operations without requiring a platform change. Practices that are growing quickly or that have ambitions to expand can build on Business Central without hitting a ceiling that requires migration further down the line.
Implementation Considerations
It is worth being straightforward about one aspect of this comparison: Sage is quicker to implement and requires less configuration than a full Dynamics 365 deployment. For a smaller practice with limited IT resource and a tight timeline, this is a genuine consideration.
The EdgeBooks accelerator is designed to address this directly. Because EdgeBooks is pre-configured for accountancy firm workflows, including billing models, client onboarding processes, compliance tracking and reporting requirements, implementation time and cost are substantially reduced compared to a standard Business Central project. Practices benefit from the depth of the platform without the implementation burden of building it from scratch.
Reporting and Business Intelligence
Both platforms offer reporting capability. Business Central connected to Power BI, which is part of the Microsoft ecosystem, provides a significantly more powerful business intelligence layer than Sage's native reporting.
For practice leadership that wants real-time dashboards showing WIP, utilisation, billing performance, pipeline value and client profitability, the Business Central and Power BI combination is the stronger option. For practices that need basic financial reporting and nothing more, Sage's native reporting may be sufficient.
Which Should Your Practice Choose?
Sage is a reasonable choice for practices that need a reliable, straightforward accounting tool and have no immediate need for integrated CRM, advanced practice management or AI capability. It is familiar, well-supported in the accountancy sector and relatively low-risk for a practice with simple requirements.
Dynamics 365 Business Central, particularly when implemented through the EdgeBooks accelerator, is the stronger choice for practices that want a platform that can support growth, that need integrated client relationship management, that are investing in AI capability through Microsoft Copilot, or that have outgrown what a standalone finance system can offer.
The firms that have made the transition, including a global network of accountants and business advisors that migrated from Sage to Dynamics 365 with Advantage, consistently report improvements in financial visibility, operational efficiency and their ability to deliver value-added services to clients.
To discuss how EdgeBooks compares to your current platform, contact Advantage on 020 3004 4600 or visit our contact page.
Related Resources
EdgeBooks - The AI Accelerator for Accountancy Firms
Dynamics 365 Business Central
Case Study: Global Network of Accountants - Sage to Dynamics Migration
Case Study: Top 20 Accountancy Practice and Business Central
Free Workshop for Accountancy Firms
