Rewrite vs Refactor Legacy Application: UAE Cost and Timeline Guide

Executive Summary

For UAE businesses, the decision to rewrite or refactor a legacy application can be crucial. With the right approach, companies can reduce maintenance costs, improve scalability, and increase ROI. In this article, we will provide a clear guide on when to rewrite or refactor a legacy application, including costs, timelines, and ROI.

The Business Problem

A Dubai-based trading company running 12 on-premise Windows servers may spend AED 15,000–30,000/month on maintenance, backup infrastructure, and support contracts. If that describes your situation, this article is for you. Signs it's time to consider rewriting or refactoring your legacy application include:

• Rising maintenance costs
• Decreasing scalability
• Increasing security risks
• Inability to integrate with new systems
• Lack of support for modern technologies

Business Impact

UAE businesses that fail to modernize their legacy applications may face significant consequences, including:

• Increased maintenance costs: AED 10,000–20,000/month
• Decreased scalability: 20-50% reduction in productivity
• Increased security risks: 10-20% chance of data breach
• Inability to integrate with new systems: 10-20% reduction in revenue
• Lack of support for modern technologies: 10-20% reduction in competitiveness

Cost Considerations in UAE

The cost of rewriting or refactoring a legacy application in UAE can vary depending on the complexity of the project, the technology stack, and the vendor. However, here are some estimated costs:

• Assessment and planning: AED 8,000–15,000
• Refactoring: AED 20,000–60,000
• Rewriting: AED 50,000–200,000
• Migration to Azure UAE: AED 10,000–50,000

Implementation Approach

A professional engagement for rewriting or refactoring a legacy application in UAE typically involves the following phases:

• Assessment and planning: 2-4 weeks
• Refactoring: 4-12 weeks
• Rewriting: 12-24 weeks
• Migration to Azure UAE: 4-12 weeks
• Testing and deployment: 2-4 weeks

Key Risks and How to Mitigate Them

UAE businesses face several risks when rewriting or refactoring a legacy application, including:

• Underestimating the complexity of the project
• Lack of experienced vendors
• Insufficient testing and quality assurance
• Inadequate change management
• UAE-specific risks: Arabic/RTL requirements, VAT configuration, DIFC/ADGM regulatory constraints

Recommendations

For a typical UAE company with 50–500 employees, we recommend refactoring the legacy application as a first step. This approach can help reduce maintenance costs, improve scalability, and increase ROI. However, if the application is heavily customized or has significant security risks, rewriting may be a better option. To get started, UAE businesses should:

• Assess their current infrastructure, team size, and monthly maintenance costs
• Evaluate their technology stack and identify areas for improvement
• Research and shortlist experienced vendors
• Develop a clear project plan and timeline
• Ensure adequate testing and quality assurance If your on-premise server hardware is older than 5 years, or your monthly IT maintenance cost exceeds AED 15,000, the ROI case for cloud migration is almost certainly positive — contact a cloud architect to begin an assessment.