How Hard Is It to Become an Air Traffic Controller? Pass Rates & Why People Fail

Becoming an air traffic controller is widely regarded as one of the toughest selection processes in UK employment — not because of academic difficulty, but because of how few applicants have the specific cognitive aptitudes the role demands. This guide gives you an honest picture of just how competitive it is, where people fall down, and how to give yourself the best possible chance.

Just How Competitive Is It?

Extremely. NATS has illustrated the scale of competition by noting that from an intake of around 3,300 applicants, roughly 15 go on to join its existing operational controllers. Even allowing for variation between intakes, the message is clear: only a tiny fraction of applicants make it all the way through. Competition for places is fierce, and the process is deliberately rigorous because the role carries direct responsibility for public safety.

That sounds daunting — but the majority of those 3,300 are filtered out at the very first aptitude stage, and a large number of them simply did not prepare. Candidates who go in cold are competing against those who have practiced the exact test formats. Preparation does not guarantee success, but a lack of it almost guarantees failure.

The Four Stages of NATS Selection

Why Most People Fail at Stage 1

Stage 1 eliminates the bulk of applicants, and the reasons are consistent (our NATS aptitude test guide breaks down each test and how to practise it):

The Stage 3 Re-Test Trap

A point that catches people out: at the Stage 3 assessment centre you re-sit the earlier aptitude tests while being observed. This is designed to confirm your Stage 1 scores were genuine. It means there is no point getting help or fluking your way through Stage 1 — you have to be reliably good. The candidates who pass are the ones whose ability is consistent under scrutiny, which only comes from genuine practice.

How to Improve Your Odds

You cannot change your raw aptitude overnight, but you can dramatically improve your performance by removing every avoidable disadvantage:

You can try realistic practice tests for free to see where you stand, and read our detailed guides to the Stage 1 aptitude battery and the assessment centre. If you are still checking whether you qualify at all, start with the air traffic controller requirements.

The Honest Bottom Line

It is hard — genuinely one of the most competitive routes into any profession. But the difficulty is concentrated in a specific, practicable set of aptitude tests, and most of the people you are competing against do not prepare properly. Thorough, targeted practice is the closest thing there is to an edge.