The short answer
Checking your bank balance repeatedly, especially when you already know it's fine, is usually less about the number and more about the brief hit of certainty the check provides. That certainty fades fast, which is exactly why the checking often repeats within hours.
The habit loop underneath it
This tends to follow a familiar structure: a trigger (a moment of uncertainty or downtime), a behavior (opening the banking app), and a reward (brief relief). Because the relief is short-lived, the loop resets and the trigger returns — not because anything's actually wrong, but because the loop itself is self-sustaining.
When it's worth paying attention to
Occasional balance checks are completely normal. The pattern worth noticing is checking that happens many times a day, out of habit rather than need, especially when it starts to feel less like information-gathering and more like a compulsion you can't quite skip.