COBOL: what it is and why it is still worth learning in 2026

COBOL (Common Business-Oriented Language) is a high-level programming language created in 1959 for commercial applications, still used today by banks, insurance companies, and governments to process transactions at scale. Find out why this veteran remains indispensable — and well paid — in 2026.

• What is COBOL?
• The historical importance of COBOL
• What is COBOL used for today?
• Where is COBOL used?
• Is it worth learning COBOL?
• The future of COBOL

What is COBOL?

COBOL is a high-level programming language designed specifically for business applications, such as transaction processing, payroll, and administrative data management. Developed in 1959 by the CODASYL committee, it was one of the first languages created with the goal of being machine-independent — capable of running on different types of computers without rewriting.

COBOL was designed to be understandable even by people without deep technical knowledge, which accelerated its adoption in the business sector. Its syntax is deliberately similar to the English language: a command like ADD SALARIO TO TOTAL reads almost like a sentence. This distinguishes it from more modern and concise languages, like Python or Java, which prioritize expressiveness for professional programmers.

This intentionally readable design allowed COBOL to become the backbone of management systems across multiple industries. Decades later, these systems remain active in critical applications, and it is precisely this longevity that sustains the language's relevance today.

The historical importance of COBOL

COBOL played a fundamental role in the evolution of commercial computing. During the 1960s and 1970s, the language was widely adopted by financial institutions, government agencies, and large corporations to develop transaction processing, data management, and administrative automation systems.

The project was born from a collective effort by the CODASYL committee, with strong influence from the FLOW-MATIC language, created by Grace Hopper's team — a pioneer who advocated programming in language close to English. According to IBM, one of the main providers of COBOL compilers for mainframes to this day, the language consolidated as the de facto standard for corporate data processing.

COBOL's impact on the history of computing is immense: it enabled the standardization of processes and the development of robust and scalable systems. Many of these systems, built decades ago, continue to operate efficiently — and are frequently considered too complex or risky to be replaced by newer technologies.

What is COBOL used for today?

COBOL serves, in 2026, to operate and maintain critical legacy systems in finance, healthcare, and government: credit card processing, core banking, insurance payments, payroll, and social security administration in various countries. It is not an academic niche language — it is infrastructure in production.

The numbers confirm this scale. The global Micro Focus COBOL Market Survey, conducted by Vanson Bourne in 2022, estimated more than 800 billion lines of COBOL running in production systems — about three times previous estimates — and found that 92% of respondents consider their COBOL applications strategic. A Reuters survey indicated that 43% of US banking systems and 95% of ATM operations depend on COBOL.

The dependence became evident in April 2020, when the state of New Jersey publicly called for volunteer COBOL programmers to reinforce the unemployment insurance system, which faced an increase of about 1,600% in claims during the pandemic. Governor Phil Murphy even joked that he had been dubbed the "King of COBOL" due to the repercussion of the appeal.

Where is COBOL used?

COBOL is used in sectors that demand high stability, decimal precision, and the capacity to process large volumes of transactions: banks, insurance companies, governments, retail, and aviation. In Brazil, large banks and public institutions maintain COBOL systems in everyday critical operations.

These domains share a characteristic: the cost of a failure is very high. The proven durability and robustness of COBOL systems — many running uninterruptedly for decades on mainframes — make them difficult to replace without relevant operational risk.

Is it worth learning COBOL?

It is worth learning COBOL for those seeking a stable niche, with little competition and high demand in banks, insurance companies, and government. It is not the obvious path for those who want to work with startups or consumer products, but it is a rational career bet in the maintenance and modernization of critical systems. Four factors support this assessment:

1. Demand for professionals: with the retirement of veteran programmers, companies face a shortage of COBOL talent, which opens well-paid opportunities for those who master the language.
2. Legacy system maintenance: organizations that operate COBOL continuously need maintenance, optimization, and integration — long, recurring projects.
3. Stability and longevity: COBOL has proven extremely durable; specializing in high-reliability systems tends to yield a safe career.
4. Interoperability: those who combine COBOL with cloud and APIs are even more valued, as they lead hybrid modernization projects.

To get started, a good free starting point is the COBOL Programming Course from the Open Mainframe Project, maintained by the Linux Foundation. And if you are still deciding your path in the field, it is worth comparing this niche with the most used programming languages in the world and reflecting on whether studying programming is worth it for your profile.

The future of COBOL

COBOL's future is less about replacement and more about integration. The complete modernization of legacy systems is expensive and risky, so most organizations opt to keep the COBOL core running and connect it to modern platforms — cloud, APIs, and web interfaces — in hybrid architectures.

Generative AI (Artificial Intelligence) has entered this equation: tools like IBM watsonx Code Assistant for Z help developers understand, refactor, and convert COBOL code to languages like Java, accelerating modernization projects without requiring the total rewrite of systems.

There is also a growing trend of training new professionals: companies that depend heavily on the language offer their own training or via specialized consultancies to ensure the continuity of their systems. As long as there are 800 billion lines in production, there will be work for those who know how to read, maintain, and modernize them.

Conclusion

COBOL is not a relic: it is living infrastructure that supports banking transactions, insurance, and public services worldwide, with hundreds of billions of lines in production and fewer and fewer people able to maintain them. For the developer willing to trade hype for stability, this asymmetry between demand and supply is one of the most underestimated career opportunities in technology — and here at CodeCrush the reading is direct: learning COBOL in 2026 is not looking at the past, it is occupying a space that few dispute.