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Usually, no. Do not replace a strong, unique password merely because a calendar reminder says it is 30, 60, or 90 days old. Change it immediately when there is evidence that it was exposed or compromised, when a service reports that its breach affected your account, or when you see unauthorized activity. If you reused that password on other services, replace it everywhere it appeared. Then use unique passwords and enable multifactor authentication (MFA), preferably a phishing-resistant method for important accounts.
What the current security guidance says
NIST no longer supports arbitrary periodic changes
The current U.S. National Institute of Standards and Technology (NIST) standard is Digital Identity Guidelines: Authentication and Authenticator Management, SP 800-63B-4, published in July 2025. It supersedes the previous SP 800-63B edition. Section 3.1.1.2 states: “Verifiers and CSPs SHALL NOT require users to change passwords periodically. However, verifiers SHALL force a change if there is evidence of compromise of the authenticator.”
In that sentence, a verifier is the service that checks your password, and a CSP (credential service provider) is the organization managing the identity service. This is a system requirement aimed at organizations, but it answers the consumer question too: there is no NIST-approved calendar interval for ordinary password changes. The exception is evidence that the credential has been compromised.
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The U.S. Cybersecurity and Infrastructure Security Agency (CISA) advises against regular changes of memorized passwords. Its explanation is practical: frequent resets can encourage predictable patterns, such as changing a final digit or cycling through a small set of familiar words. CISA and NIST therefore recommend changing passwords in response to risk, not on a fixed schedule.
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Why you may still see a 90-day rule
Many workplaces, legacy applications, and older policy documents still display a 60- or 90-day expiration requirement. Those rules reflect earlier practice, not the current NIST position. A 90-day prompt is not proof that your password is weak or that a new one will be safer. An employer or service may retain a stricter policy for operational or regulatory reasons, but that is a local requirement rather than a universal expert recommendation.
Why routine rotation can make passwords weaker
A forced change gives an attacker no benefit when the existing password is still secret, but it can make the user choose a less secure replacement. People commonly make small, foreseeable edits: adding a number, changing a month, or moving to the next word in a sequence. An attacker who knows the previous password can often guess those transformations.
Frequent resets also increase the chance that users will write passwords down in exposed places, reuse a favorite password, or choose a short substitute they can remember. A reset can create a false sense of safety while leaving the underlying problem—reuse, phishing, malware, or an exposed recovery channel—untouched.
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Changing a password does not revoke every stolen session or repair a compromised device. If an attacker has an active browser session, a stolen recovery token, or access to your email, changing only the visible password may not end the intrusion. Risk-triggered response must include account sessions, recovery methods, and the device used to change the credential.
Use the right trigger instead of a calendar
| Situation | Recommended action | Reason |
|---|---|---|
| A strong, unique password has no warning signs | Keep it; do not rotate on a schedule. | Current NIST guidance does not require periodic changes, and CISA warns that routine resets can produce predictable patterns. |
| A service sends a credible breach notice affecting your account | Change the affected password promptly, then review sessions and MFA. | A provider’s notice is evidence that the authenticator may have been exposed. |
| You observe fraudulent activity, an unfamiliar login, or an unexpected password-reset message | Use a trusted device to change the password and secure the account immediately. | Observed unauthorized activity is evidence of possible compromise. |
| The same password was used on more than one service | Replace it with a different password on every account where it was reused. | Distinct passwords limit password stuffing, in which a password stolen from one service is tried on others. |
| You entered the password into a suspected phishing page or on an infected device | Change it from a known-clean device and investigate the account and device. | The password may have been captured even if no suspicious login is visible yet. |
What to do after a breach or suspected compromise
- Confirm the signal. Read the provider’s notice in the account’s official app or by typing the known web address yourself. Do not follow an unexpected reset link in an email or text until you verify it.
- Use a trusted device. If the computer or phone used normally may be infected, update its operating system and security software or use another device that you trust.
- Change the affected password. Create a new password that is not a variation of the old one and has never been used on another service.
- End other sessions. Look for controls such as “sign out of all devices,” “log out of other sessions,” or a list of active sessions. Remove devices and sessions you do not recognize.
- Check account-recovery settings. Review the recovery email address, phone number, backup codes, trusted devices, app passwords, and connected applications. Remove anything an attacker could have added.
- Turn on MFA. Prefer a phishing-resistant method when the service offers one. Otherwise use the strongest available second factor and store backup codes safely.
- Check for reuse. Search your password manager, browser vault, or personal records for the old password and change every account that used it. Start with your primary email, financial services, cloud storage, and accounts that can reset other passwords.
If the provider says only limited information was exposed, follow its specific instructions, but do not assume that a notice saying passwords were “hashed” eliminates all risk. The appropriate response depends on the service’s controls and the evidence it provides.
Why unique passwords matter more than frequent changes
Password reuse creates a chain reaction. If criminals obtain a password from one breached service, they can automatically test that same username-and-password pair against email, shopping, workplace, and financial sites. NIST describes distinct passwords as a defense against this password-stuffing pattern.
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Uniqueness does not mean you must memorize dozens of complicated strings. It means each account receives a different credential, so a breach at one service does not unlock another. Your email account deserves special priority because control of it can enable password resets for many other accounts.
Use a password manager to make unique credentials practical
CISA recommends considering a password manager when it helps you maintain unique passwords. A manager can generate and store credentials so you do not have to invent a new memorable phrase for every site. The security model differs between products, so evaluate the service rather than assuming that every manager works the same way.
Questions to ask before choosing one
- How is the database stored? Determine whether encrypted data is synchronized through a provider’s cloud service, kept locally on your devices, or offered through a choice of both. Understand what the provider can and cannot access.
- Which devices and browsers are supported? A manager is useful only if it works on the computers, phones, and browsers where you sign in. Check support for your current platforms before moving your vault.
- How does recovery work? Read what happens if you forget the master credential, lose your phone, or replace a device. A recovery feature can improve availability but changes the account’s threat model.
- Is MFA available? Protect the manager itself with MFA, because it may contain the keys to every other account.
- Can you export or recover your data safely? Know how to regain access or migrate if the service becomes unavailable, while keeping any exported vault protected and deleting temporary copies.
Use a long, unique master credential that you can remember, and never reuse it on another service. A manager reduces reuse risk; it does not make phishing, malware, or an unprotected recovery account harmless.
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MFA complements password hygiene
MFA requires an additional factor, such as a hardware authenticator, an authenticator application, or another approved method. It can block an attacker who knows the password but cannot satisfy the second factor. For high-value accounts, choose phishing-resistant MFA when offered; a physical security key is one example of that category.
MFA is not a reason to ignore a compromised password. An attacker may still exploit a stolen session, capture a second factor through phishing, or target recovery settings. Change a password when there is evidence of compromise, then verify that MFA methods and backup codes still belong to you.
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What organizations and administrators should do
Administrators should align password policy with NIST SP 800-63B-4: do not force periodic changes without a specific risk-based reason, and force a change when there is evidence that the authenticator was compromised. Evidence can include a breach of the verifier’s hashed-password database or observed fraudulent activity.
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A practical policy separates three controls that are often confused:
- Compromise response: revoke or reset credentials tied to a confirmed incident.
- Password quality: reject passwords known to be compromised or too easy to guess, and prevent reuse where the system can do so safely.
- Account protection: provide MFA, session revocation, recovery controls, and clear breach notifications.
Help-desk staff should be trained to verify identity without asking users to disclose their passwords. Systems should make it easy to review active sessions and report suspicious activity. If a sector-specific rule or contract still mandates expiration, document that reason and avoid presenting the interval as a general security recommendation.
A simple policy for personal accounts
- Keep a password that is unique and has no evidence of exposure.
- Change it immediately after a credible breach notice, suspicious login, phishing event, or other sign of compromise.
- Replace every reused copy, not just the password on the account that sent the notice.
- Use a password manager if it helps you generate and maintain unique credentials.
- Enable MFA, prioritizing phishing-resistant options for email, financial, work, and administrator accounts.
- After any incident, review sessions, recovery methods, connected apps, and backup codes—not only the password field.
The result is a risk-based routine: no arbitrary expiration date, but a fast and thorough response whenever the evidence changes.
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