D365 CRM MigrationCost-Benefit Analysis
Full cost-benefit framework for migrating a mid-market Croatian manufacturer from legacy CRM to Dynamics 365 Sales + Customer Service
Business Analyst Portfolio Project | By David Mustač | March 2026
Scenario Definition
The hypothetical client: "Adria Manufacturing d.o.o." — a typical D365 consulting engagement
Client Profile
Current Pain Points
User Breakdown — 45 Licensed Users
| Role | Count | License | |
|---|---|---|---|
| Sales Representatives | 15 | Sales Professional | |
| Sales Managers | 5 | Sales Enterprise | |
| CS Agents | 10 | CS Enterprise | |
| CS Manager | 2 | CS Enterprise | |
| Marketing | 3 | Sales Professional | |
| Executives | 5 | Sales Enterprise | |
| IT Admin | 2 | Power Platform | |
| Field Service | 3 | Sales Professional | |
| Total | 45 | ||
Current State Assessment
Legacy system audit reveals critical gaps across every dimension
PHP/MySQL on-premise, custom-built 2018
Single point of failure, no vendor support
~120K contacts, 45K accounts, 15K opportunities
Significant cleanup needed before migration
Manual CSV exports to Pantheon ERP
4-6 hrs/week wasted on manual transfer
None
Sales reps use spreadsheets on the road
Manual Excel exports, 1 person weekly
8-10 hrs/week on manual reporting
~95% (outages 2-3x/quarter)
Lost productivity, customer delays
€18,000/year (part-time dev + hosting)
Cost rising — developer leaving
No GDPR audit trail, no RBAC
Regulatory risk increasing
Cost of Doing Nothing — Annual
| Category | Annual Cost |
|---|---|
| Current maintenance | €18,000 |
| Manual data transfer | €7,800 |
| Manual reporting | €15,600 |
| Lost sales (no mobile) | €24,000 |
| Server downtime | €4,800 |
| GDPR exposure | €10,000–€50,000 |
| Total Status Quo Cost | €80,200–€125,200/yr |
D365 Licensing Cost Model
Microsoft Dynamics 365 2026 pricing — first app base license, additional apps at attach rates
User Count Simulator
45 users| User Group | Count | License Type | €/month | Annual Total | |
|---|---|---|---|---|---|
| Sales Reps | 15 | Sales Professional | €60 | €10,800 | |
| Sales Managers | 5 | Sales Enterprise | €88 | €5,280 | |
| CS Agents | 10 | CS Enterprise | €88 | €10,560 | |
| CS Manager | 2 | CS Enterprise | €88 | €2,112 | |
| Marketing | 3 | Sales Professional | €60 | €2,160 | |
| Executives | 5 | Sales Enterprise | €88 | €5,280 | |
| IT Admin | 2 | Power Platform | €37 | €888 | |
| Field Service | 3 | Sales Professional | €60 | €2,160 | |
| Subtotal Licenses | 45 | €39,240/yr | |||
Additional Platform Costs
3-Year Projection (~5% annual increase)
Implementation Cost Breakdown
840 hours across 8 phases over ~20 weeks — €101,600 total consulting investment
Cost by Phase (€)
Hours Distribution (840 total)
| Phase | Duration | Hours | Cost (€) | % of Total |
|---|---|---|---|---|
Discovery | 3 weeks | 120 | €12,000 | 12% |
Design | 2 weeks | 80 | €10,400 | 10% |
Config & Custom | 6 weeks | 280 | €36,400 | 36% |
Data Migration | 3 weeks | 120 | €14,400 | 14% |
Integration | 2 weeks | 80 | €10,400 | 10% |
Testing & UAT | 2 weeks | 60 | €6,600 | 7% |
Training & Go-Live | 2 weeks | 60 | €6,600 | 7% |
Post-Go-Live | 4 weeks | 40 | €4,800 | 5% |
| Total | ~20 weeks | 840 | €101,600 | 100% |
Consulting Rates (Croatian/CEE Market)
Western European partners charge €175-250/hr — CEE rates offer a competitive advantage.
Business Value & ROI Projection
€134,400/year in quantified value — 38.3% ROI over 3 years with 16-month payback
Quantified Business Value (Annual)
| Value Driver | Annual € |
|---|---|
| Eliminated manual reporting | €15,600 |
| Eliminated manual data transfer | €7,800 |
| Reduced legacy maintenance | €18,000 |
| Sales productivity (mobile CRM) | €36,000 |
| Faster sales cycle | €24,000 |
| Reduced customer churn | €18,000 |
| Compliance risk reduction | €15,000 |
| Total Annual Value | €134,400 |
Break-Even Analysis (36 months)
Break-even at Month 16 — net positive thereafter
D365 vs. Legacy — Annual Cost
Year 1 is heavy; Years 2-3 D365 costs drop below legacy
ROI Sensitivity Analysis
Even at 50% of estimated value, payback is 26 months — still within typical approval horizon.
Risk Assessment & Mitigation
8 identified risks with probability-impact scoring and detailed mitigation plans
| # | Risk | Probability | Impact | Level |
|---|---|---|---|---|
| R1 | Pantheon integration fails/delays | MEDIUM | HIGH | |
| R2 | Data quality worse than estimated | HIGH | MEDIUM | |
| R3 | User adoption below 60% at Month 3 | MEDIUM | HIGH | |
| R4 | Scope creep during customization | HIGH | MEDIUM | |
| R5 | Key stakeholder unavailable for UAT | MEDIUM | MEDIUM | |
| R6 | Microsoft licensing price increase | LOW | LOW | |
| R7 | Go-live during peak business period | MEDIUM | HIGH | |
| R8 | Croatian localization issues | MEDIUM | MEDIUM |
Pantheon ERP Integration
User Adoption
Go-Live Timing
Migration Timeline
20-week implementation with parallel tracks and key milestone gates
Key Milestones
Critical Path
Data migration prep runs alongside configuration (W6-W14)
Integration development overlaps with configuration (W6-W11)
Training preparation starts W12, delivery W17
Decision Matrix
Weighted multi-criteria comparison — D365 scores 8.65/10, leading across all dimensions
Multi-Criteria Comparison
| Criteria | Wt | D365 | Legacy | SF | HS |
|---|---|---|---|---|---|
| Functionality | 25% | 9/10 | 4/10 | 9/10 | 7/10 |
| TCO (inverted) | 20% | 7/10 | 7.5/10 | 6/10 | 9/10 |
| MS Integration | 15% | 10/10 | 2/10 | 5/10 | 6/10 |
| Scalability | 10% | 9/10 | 2/10 | 9/10 | 7/10 |
| Local Support | 10% | 10/10 | 1/10 | 4/10 | 3/10 |
| User Adoption | 10% | 7/10 | 3/10 | 6/10 | 8/10 |
| Compliance | 10% | 9/10 | 3/10 | 8/10 | 7/10 |
Why D365 Wins for This Client
When D365 Might Not Win
Executive Summary
One-page business case for client presentation
D365 Migration Business Case — Prepared by Business Analyst
The Problem
Your current CRM is 8 years old, custom-built, has no mobile access, no integration with Pantheon, and the developer maintaining it is leaving. You're spending €80-125K/year keeping a system alive that your sales team rates 2.1/5. Every week, your people waste 15+ hours on manual reporting and data transfer.
The Solution
Migrate to Microsoft Dynamics 365 Sales + Customer Service. Full implementation in 20 weeks. 45 users with role-based licensing. Native integration with your existing Microsoft 365 tools + custom integration with Pantheon ERP.
The Investment
The Return
The Alternative: Doing Nothing
Costs €270,600 over 3 years with zero value creation and increasing risk. The system is deteriorating, the developer is leaving, and GDPR exposure grows every month.
Recommendation
Proceed with D365 migration. Start Discovery in April 2026. Go live by August 2026. Engage a certified Microsoft Partner as implementation consultant.