For decades, IT departments and security blogs repeated the same mantra: *You must change your passwords every 90 days.* It turns out, that advice is now considered entirely obsolete.
The Problem with Mandatory Password Changes
Research by Microsoft and the FBI has proven that forcing users to change their passwords frequently leads to a phenomenon called 'Password Fatigue'. When forced to create a new password, human beings get lazy. If their password was Summer2025!, they will simply change it to Summer2026!. Hackers know this algorithm.
The Modern Advice
The National Institute of Standards and Technology (NIST) now officially recommends that you do not change your password unless you have evidence that it has been compromised.
What You Should Do Instead
Instead of changing passwords frequently, the focus is now on changing how they are structured:
- Length over Complexity: A 16-character password of random words (correct-horse-battery-staple) is far harder for a computer to crack than an 8 character complex one (P@s!).
- Never Reuse: The biggest risk isn't someone guessing your password; it's someone stealing it from a poorly secured website. If you use the same password everywhere, a breach at one tiny site compromises your bank account.
- Turn on 2FA: Two-factor authentication makes your password significantly less important, as the hacker still needs your phone to log in.