When should teams phase out passwords in favour of passkeys?

Why This Matters for Security Teams

Passwords persist because they are familiar, but familiarity is not a security strategy. For most organisations, the real trigger for phasing them out is not a single breach headline, but the accumulation of phishing exposure, help desk resets, reuse across services, and weak recovery paths. Passkeys reduce those failure modes by binding authentication to a device and removing shared secrets from the login flow. Current guidance from NIST Cybersecurity Framework 2.0 also reinforces that identity controls should be risk-based and resilient, not merely convenient.

Teams should treat password retirement as a migration program, not a switch. That means assessing whether the organisation can support roaming users, lost-device recovery, legacy applications, and mixed-authentication during transition. It also means understanding where passwords are still acting as a fallback for privileged access or shared accounts, because those use cases often become the last blockers. NHIMG’s Ultimate Guide to NHIs shows how identity risk persists when secrets remain overly exposed and poorly governed, which is a useful reminder that authentication changes only work when lifecycle controls are equally mature.

In practice, many security teams discover the weakest point only after phishing, account takeover, or a help desk recovery failure has already exposed the gap.

How It Works in Practice

The practical answer is to phase out passwords once passkeys can cover the majority of user journeys without creating unacceptable exceptions. Passkeys use public-key cryptography, so the authenticator proves possession of a device-bound private key while the service stores only a public key. That removes password reuse, database theft risk, and phishing-friendly shared secrets. The strongest implementations pair this with MFA policy, conditional access, and recovery workflows that do not fall back to weaker factors by default.

A sensible migration sequence usually looks like this:

• Enable passkeys alongside passwords for a limited period, with usage telemetry by user group and application.
• Prioritise high-risk populations first, such as administrators, finance users, and remote workers.
• Require secure account recovery, including identity proofing, device re-binding, and help desk step-up verification.
• Eliminate password-only paths for sensitive applications once passkey adoption is high enough to support supportable edge cases.
• Retain exceptions only where a documented business constraint exists, such as unsupported legacy systems or kiosk-style access.

Implementation is easier when identity teams align policy, app teams, and service desk procedures. Guidance from the NIST Cybersecurity Framework 2.0 is useful here because it frames identity as an operational control, not just an end-user feature. NHIMG’s Ultimate Guide to NHIs also highlights a broader lesson: if the organisation cannot inventory, govern, and revoke identity credentials cleanly, then replacing one login method with another will not reduce systemic risk.

These controls tend to break down in mixed estates where legacy SSO, shared devices, or weak recovery processes still force password fallback paths.

Common Variations and Edge Cases

Tighter password removal often increases operational overhead, requiring organisations to balance phishing resistance against support complexity. That tradeoff is real, especially for distributed workforces, contractor access, regulated environments, and business-critical legacy systems. Best practice is evolving, and there is no universal standard for a full password-free state across every application on day one.

Some teams can retire passwords quickly for employee portals but must keep limited exceptions for vendor access, offline use, or hardware-constrained environments. Others may choose a long transition where passwords remain only as a recovery mechanism, not as a primary login path. The key is to avoid hidden regressions: if a passkey enrolment failure simply drops the user back to SMS or an easily reset password, the security gain is much smaller than expected. Strong recovery design matters as much as the authenticator itself.

For teams benchmarking their identity maturity, NHIMG’s Ultimate Guide to NHIs is a useful reference for how lifecycle discipline reduces exposure when credentials are no longer treated as static assets. In practice, password phase-out works best when the organisation can support devices, users, and exceptions without reintroducing the very weaknesses it is trying to remove.

Related resources from NHI Mgmt Group

• How should security teams phase out passwords without breaking access?
• How should security teams handle credential migration when passwords are spread across spreadsheets, browser exports, and legacy managers?
• How should security teams balance convenience and risk when using browser-based autofill for passwords and other vault items?
• When do passkeys deliver more value than passwords in enterprise environments?