Debunking COBOL Myths: Unlocking Its True Potential

5 min. read

COBOL's legacy, reimagined for your future

COBOL has been the backbone of industries powering the world’s economy for decades. This steadfast language continues to adapt and thrive, offering businesses unmatched reliability, scalability, and modernization opportunities. However, for many people, COBOL's reputation is clouded by a number of persistent myths and misunderstandings – even those familiar with COBOL may still judge it based on how it looked and operated over 30 years ago. So let’s separate some fact from fiction and explore how COBOL has evolved and answer the question: can your organization still rely on COBOL to meet its business needs today and in the years to come? 

 

COBOL. Modernized & Supercharged

After acquiring the Application Modernization and Connectivity (AMC) business from OpenText in 2024, Rocket Software has continued to invest in the evolution of the COBOL language and modernization solutions, ensuring this foundational technology stays relevant, resilient, and ready for today’s enterprise demands.

Why COBOL still powers the world’s economy

COBOL has been a cornerstone of global finance and business for over 60 years, processing trillions in daily transactions. It powers 40% of online banking, 95% of ATM transactions, and 80% of in-person credit card workflows. Industries like banking, insurance, airlines, and government rely on COBOL for reliable and efficient operations.

 

  • Designed for business and built to last

    COBOL was purpose-built for high-volume data processing, complex reporting, and precise financial calculations. Every day, COBOL applications process nearly 200 times more transactions than all Google and YouTube searches combined. High performance and rock-solid reliability have always been hallmarks of COBOL systems.

  • High portability: it runs just about anywhere

    COBOL applications written decades ago still operate seamlessly on today’s platforms, from mainframes to the multicloud. Thanks to COBOL’s portability, mission-critical applications have adapted across generations of technology and will continue to do so. Enterprises can reuse core business logic and quickly embrace innovations in the IT landscape, without rewriting applications from scratch.

  • Easy to learn

    COBOL’s English-like syntax simplifies onboarding and cross-training for developers with any background. While some see COBOL as unusual compared to the more compact and syntactic languages, today’s AI-driven world highlights the power of plain language. Now, writing clear prompts is key to getting the right results and in that way, COBOL was ahead of its time.

  • A proven heritage

    Billions of lines of COBOL code run the core systems behind the world’s most vital services - handling everything from salary payments and tax records to banking transactions, patient care, global logistics and in many more places you might not expect. These are not fringe apps; they are foundational, often operating at national or global scale with zero tolerance for downtime. With decades of dependable performance, COBOL has earned the trust of the world’s most essential industries.

  • Evolving with the enterprise

    The language itself has evolved, with support for programming concepts like object-oriented design and strong typing. Beyond the language, COBOL-powered applications have kept pace with the broader tech landscape, integrating with containers, APIs and microservices, .NET, Java, CI/CD pipelines, and multicloud environments. It’s a language rooted in legacy but built for the today’s enterprise.

Debunking the myths about COBOL

Discover the truth about COBOL as we debunk common myths and highlight its relevance, adaptability, and modernization potential in today's tech landscape.

 

Myth #1: COBOL is no longer in use. 

Reality: According to a Vanson Bourne survey, over 800 billion lines of COBOL code are active worldwide. While new COBOL applications are rare, existing systems are regularly maintained and expanded, adding more code each year.

 

Myth #2: COBOL can’t integrate with new tech stacks. 

Reality: Rocket® COBOL integrates with JVM and .NET platforms, making it compatible with today’s languages and contemporary IT architectures like microservices. COBOL's portability has enabled enterprises to use their core business logic across every era of IT without requiring a complete rewrite.

 

Myth #3: COBOL only runs on mainframes.

Reality: COBOL started on mainframes, expanded to Linux and UNIX in 1976, and now runs almost anywhere, from the cloud and containers to virtualized environments. With one flexible codebase, enterprises reduce technical debt and lower costs while keeping their mission critical systems adaptable for the future – no matter what that holds or looks like. 

Myth #4: COBOL is hard to learn.

Reality: COBOL is a relatively easy programming language to learn for developers from any background. One of the biggest challenges is navigating complex codebases without proper documentation or available specialists. Tools like Rocket COBOL Analyzer, support for industry-standard IDEs, and GenAI features simplify working with code for any engineer. To make COBOL even more accessible for new developers, Rocket offers free "Learn COBOL in One Day" course and an active COBOL community.

Using Rocket Visual COBOL, we created a CI/CD pipeline in AWS for rapid deployment. Instead of two major releases a year, we deployed 800 times in 12 months.”

Mark Bell Virtual Machine Environment - Replacement Program Deputy Director Department for Work and Pensions
Myth #5: Modernization requires rewriting COBOL applications in a new language.

Reality: Rocket COBOL products let you modernize and extend COBOL systems without rewriting the whole application from scratch. You can keep and reuse valuable business logic, remove outdated code, and reduce technical debt incrementally. Built-in tools let you refactor code automatically, making it easier to test, maintain, and update the application. This approach is especially effective for large, business-critical systems, where gradual transformation is often more strategic than a full rebuild.

Thankfully our architecture was designed using COBOL and this simple fact meant we were able to leverage Rocket Visual COBOL by Rocket Software to change the environment without changing the business logic or component parts.”

Patrick Gueneau IS Architect MAIF

Unlock the true potential of COBOL

Today COBOL remains a powerful, adaptable technology supporting critical business operations. New technologies have enhanced its scalability, security, and efficiency, debunking the outdated myths.

 

Continuous Modernization, Boundless Business Value E-book cover
Read the eBook

Embrace the IT Landscape

Re-platform, modernize, and cloud-enable your COBOL applications with minimal code change and disruption.

Unlock your business logic and data

Reduce complexity and increase transparency in managing large-scale COBOL codebases, empowering teams to update mission-critical applications with confidence

Deliver new business value, faster

Seamlessly integrate COBOL with today’s IT architectures – from containers and cloud platforms to APIs, microservices, and even direct deployment to the Java Virtual Machine or .NET. Teams can extend and reuse existing business logic across systems throughout the enterprise.

Fuel the Next Generation of COBOL Talent

Empower engineers from any background to work effectively with COBOL, using industry-standard tools familiar to millions of developers worldwide, enhanced by GenAI-driven natural language assistance.

COBOL you can build on: Act now

Whether you're modernizing longstanding systems or seeking scalable solutions for the future, COBOL can deliver unmatched reliability while optimizing your IT strategy. 

Download our exclusive eBook, “Continuous Modernization, Boundless Business Value,” and uncover how COBOL can drive both innovation and success. 

Unlock COBOL’s potential today! 

It’s time to modernize with confidence without compromise.

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Learn COBOL in 1 Day

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Rocket® Visual COBOL®

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Keep COBOL application modernization on distributed, virtual, and cloud platforms.

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Rocket® Enterprise Suite

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Improves application modernization for IBM® mainframe PL/I and COBOL teams, enabling re-platforming to various production servers, including the cloud.