COBOL: The 65-Year-Old Language Powering Global Finance

At a time when AI engineers with special skills are being paid millions, there is a small group of young developers who are working 65-year-old programming language and making fortunes. This programming language is called COBOL and it remains the absolute, load-bearing software of the global financial system, handling more money every single day than the entire annual GDP of many nations, since the Eisenhower administration.

What is COBOL

COBOL, a programming language created in 1959, is tucked away inside silent corporate mainframes, the invisible foundation of the global financial system. It was coded back when Dwight D. Eisenhower was in the White House, co-designed by tech pioneer Rear Admiral Grace Hopper. It was originally built to be a temporary stopgap. But it became the backbone software of the modern developed world and it is currently driving a multi-million-dollar corporate scramble to keep it from collapsing. The scale of what COBOL handles every single day is huge. The amount of daily global commerce flowing through COBOL systems is $3 trillion, and 95% of all worldwide ATM transactions touch COBOL code. Further, 80% of all in-person banking transactions are reliant on this language, and 40% of all US banking infrastructure is built entirely on COBOL. It doesn't stop with Wall Street. The US Treasury, the IRS, the Social Security Administration, and the Department of Veterans Affairs all run on COBOL. Experts warn that if COBOL stopped working tomorrow, major parts of the American economy would go dark in just a matter of hours.

Why banks can't quit COBOL

The obvious question is, “why haven't multi-billion-dollar banks simply replaced this ancient tech?” First, COBOL is exceptionally good at its job and these systems stable compared to modern software. It was designed to do one thing with absolute precision: move massive amounts of money reliably. COBOL Second, replacing it is a financial and operational issue. A major bank doesn't just run one COBOL program; it runs an interconnected web of code written over six decades. This software holds generations of business rules and regulations that exist nowhere else. Replacing it is not going to be a simple upgrade. Several institutions have tried to escape and failed. For example, The Commonwealth Bank of Australia attempted to migrate off COBOL, and the process took five years, costing the bank $750 million. Most banks have realized that paying millions to maintain COBOL is much cheaper than trying to replace it.

Why young developers are being paid a fortune for old software

Keeping COBOL alive requires humans who can actually read it, and if a report is to be believed, those humans are running out. The engineers who built the world’s financial systems are now in their 60s, 70s, and 80s. They are currently retiring at a rate of roughly 10% per year. Since university computer science programs largely stopped teaching COBOL in the 1980s, the pipeline of talent has been dry for forty years. According to recent industry surveys, roughly 60% of organisations running COBOL are struggling to find qualified developers. The situation has become so tight that a niche agency named COBOL Cowboys has built a lucrative business out of dragging retired programmers out of retirement for emergency corporate consulting. To prevent a widespread infrastructure crisis, global corporations are deploying three expensive emergency strategies. First is to paying astronomical rates to developers or retirees, who are said to be making significantly more money doing part-time consulting than they ever did during their full-time careers. The second is the “Reverse Migration” of young talent. The report says that a small group of programmers in their 20s and 30s have realised that COBOL skills are incredibly scarce, and they have mastered the language, and are landing top-dollar tech positions. Thirdly, banks are using advanced AI models to read, maintain, and safely update decades-old COBOL code.