Shared logins at a startup: myths and facts

Shared logins feel convenient in a small team, but they hide who took an action, make offboarding harder and weaken MFA. Replace them with named accounts where the tool supports seats, and put the rest in a shared vault with named access and rotation after someone leaves.

Myth: we trust each other, so it does not matter

Trust is not the issue. Accountability is. When something goes wrong, a shared login cannot tell you who did it, which slows the investigation and can wrongly put suspicion on everyone.

Myth: a seat for each person costs too much

Sometimes true for expensive tools. Compare the cost with the risk. For many tools, the cost is small, and the benefit includes audit logs per person. When seats are costly, restrict who really needs access.

Myth: MFA cannot work on a shared account

It can, but the second factor usually ends up on one person's phone, which makes that person a bottleneck and a risk. Shared MFA codes sent in chat defeat the purpose. If you must share, use a password manager that supports shared one time codes, with access limited to named people.

Fact: leavers keep access to shared accounts

Anyone who knew the password can use it later, unless you rotate it. The CISA small business guidance recommends unique passwords and a company password manager, which makes rotation feasible.

Fact: some accounts really are shared

A social media account or a vendor portal might not support multiple users. For these, use a vault entry with a clear owner, a list of who has access, and a rotation routine at every departure.

How to replace them

1. List shared accounts. Ask the team, then check the password manager and chat history.
2. For each, check whether the tool supports individual seats or single sign on.
3. Move to named accounts where it does, then delete the shared login.
4. For the rest, move credentials to a shared vault, remove them from chat, and record the owner.
5. Add a rotation step to your offboarding checklist.

Service accounts.

Machine accounts are shared by nature. Give each a single purpose, an owner, a scoped permission and a rotation date. Prefer short lived credentials or roles over static keys, as AWS recommends for access to its platform.

Common pitfalls.

One more point. Audit trails matter beyond security. When a customer asks who changed a setting, or a finance tool shows an odd edit, named accounts let you answer in minutes. Shared logins also make it hard to apply conditional rules such as requiring a managed device, since the login does not belong to anyone. Treat every move from shared to named access as a small win and record it in your weekly security hour log.

Quick check

Sources

1. Strong password guidance for small and medium businesses (CISA)
2. Root user best practices for your AWS account

Last reviewed: 19 October 2026.