Single Sign-On (SSO) for SMEs: Fewer Passwords, Better Security

More and more SMEs are seeing the same pattern: staff work with ten to twenty cloud applications, everyone uses a slightly different password everywhere, and the helpdesk is flooded with "I've forgotten my password" tickets. Single Sign-On (SSO) promises to solve this: log in once, get in everywhere. In this article we explain exactly what SSO is, how it works, what the real benefits and risks are for SMEs, and what the most widely used solutions cost.

What exactly is Single Sign-On?

Single Sign-On is an authentication method in which a user logs in once with a central identity provider (IdP) and then gets access to all connected applications without logging in again. The IdP is the trusted party: it verifies who you are and issues the applications a temporary token that says "this person is who they claim to be".

In practice: you open your laptop in the morning, log in once to Microsoft Entra or Google Workspace (or Okta, or JumpCloud), and from then on Outlook, Teams, Salesforce, HubSpot and Slack open straight away. Passwords or passkeys are still involved, but not twenty different ones, and not twenty different places where an attacker can steal them.

Why SSO has suddenly become an SME issue

Dashlane reported that the average person manages 301 passwords. Even if you halve that for work alone, it's more than anyone can remember without tricks.

The result: password reuse. A study of 19.03 billion leaked passwords found that 94 per cent were reused or duplicates. The Verizon 2026 DBIR names stolen credentials as the initial access vector in 22 per cent of all confirmed breaches; 88 per cent of attacks on basic web applications use stolen credentials.

For SMEs the maths is simple: the more separate passwords you have, the greater the chance of a weak, reused or leaked password somewhere in your systems. SSO cuts that number drastically. See also our article on rolling out a business password manager, often the first step towards SSO.

The hard helpdesk costs of passwords

Beyond security, there's a very real cost side. Gartner has reported for years that 20 to 50 per cent of all helpdesk tickets are about passwords. HDI arrives at around $70 per password reset ticket with full service, including identity verification, workflow and audit trail. Forrester's more conservative estimate of $25 to $30 per general helpdesk ticket also adds up quickly across hundreds of tickets a year.

For an SME with 50 employees and two resets per employee per year, you can easily reach €5,000 to €7,000 in pure helpdesk time, plus 15 to 30 minutes of lost productivity per reset. SSO removes the vast majority of that. One central account with a password remains, but it's just the one, and resets usually go through self-service with strong identity verification.

The underlying protocols: SAML, OIDC and OAuth

When you talk to a supplier or consultant about SSO, three acronyms come up. In brief:

• SAML 2.0 is the older standard for enterprise SSO, more than ten years old. It carries identity in signed XML messages via the browser. Virtually all business software supports SAML, even if it isn't always called that.
• OpenID Connect (OIDC) is the modern successor, built on top of OAuth 2.0. It uses JSON Web Tokens (JWT) instead of XML and suits mobile apps, single-page apps and cloud-native SaaS better.
• OAuth 2.0 isn't a login protocol but an authorisation protocol: it lets app A do something on your behalf in app B without giving your password to A. "Login with Google" uses OAuth plus OIDC under the hood.

For SMEs the practical rule is: choose an IdP that handles both SAML and OIDC, because you'll come across both. New cloud apps lean towards OIDC, while older enterprise software often still uses SAML. Our page on zero trust security goes deeper into why modern identity protocols matter.

Which identity providers suit SMEs?

The three most common choices:

Microsoft Entra ID (formerly Azure AD). A basic version of Entra ID is already included with Microsoft 365. For full SSO to external apps you need Entra ID P1: around $7 per user per month on an annual commitment since the price increase of 1 July 2026. P2, with risk-based conditional access, is $10. Microsoft 365 E3 includes P1, and E5 includes P2.

Okta Workforce Identity. The independent pure-play option. An SSO-only package starts at $2 per user per month; realistically you'll need the Starter Suite ($6, with SSO, MFA, Adaptive MFA and Universal Directory) or Essentials ($17). Minimum contract $1,500 a year, annual billing only.

JumpCloud. Popular in mixed Windows/Mac environments. The SSO plan is around $13 per user per month; Platform is $22 and Platform Prime $27.

For organisations built on Microsoft 365, Entra ID P1 is the logical starting point because it integrates with what you already run. For mixed stacks, lots of Macs or Google Workspace, Okta and JumpCloud are the stronger choices.

Always combine SSO with MFA or passkeys

SSO on its own isn't more secure than separate passwords; it's just more efficient. If someone steals that one central password, they suddenly have access to every app. That's the inherent risk. The solution is well known: always combine SSO with strong multi-factor authentication, and ideally with passkeys (phishing-resistant login based on FIDO2).

The median share of authentication attempts at SSO providers classified as credential stuffing is 19 per cent per day. In short: attackers know a central login is a valuable prize and actively target it. Without MFA, the risk of a successful brute-force or credential-stuffing attack is too high.

If you haven't rolled out MFA yet, do that first. Our MFA implementation guide describes the steps.

Benefits and limitations at a glance

Benefits:

• Fewer passwords per employee, so less reuse and fewer weak passwords.
• Fewer password-related helpdesk tickets, and therefore lower operating costs.
• Faster onboarding of new employees: you connect them to the IdP and they immediately have access to every app they're entitled to.
• Faster and safer offboarding: deactivating someone in the IdP shuts them out of every app at once, with no loose ends. Read our guide to IT onboarding and offboarding too.
• Central auditing: you can see who accessed which app and when, which is crucial for NIS2, GDPR and cyber insurance.
• A foundation for Zero Trust and Conditional Access: risk-based access, sign-in only from managed devices, geo-restrictions.

Limitations and risks:

• Single point of failure: if the IdP is down, nobody can get in anywhere. This is rare with large providers, but it's a real risk.
• If the central account is compromised, everything is exposed. MFA or passkeys aren't a luxury but a necessity.
• Costs scale with headcount. At 100 employees, licences can run to €10,000 to €20,000 a year depending on your choice.
• Not every app supports SSO in its cheapest tier: many SaaS vendors charge a so-called "SSO tax" and push you to a more expensive plan. That can undermine the business case.
• Integration isn't free: allow 1 to 4 weeks of implementation time depending on the number of apps.

How do you approach an SSO implementation?

A good SSO rollout at an SME follows a set pattern:

1. Choose your IdP. Usually Entra ID if you're already a Microsoft shop, otherwise Okta or JumpCloud. Compare not just price but also which apps are supported.
2. Take stock of your apps. List every SaaS tool your staff actually use. Don't forget the "shadow IT" that was never officially approved. More on this in our article on shadow IT risks.
3. Prioritise. Connect the apps with the most users and the most sensitive data first (email, CRM, accounting, HR).
4. Configure MFA or passkeys at the same time. Don't leave it until later; otherwise you'll take a hit on user convenience halfway through without the security gain.
5. Test with a small group. Roll out to IT and a handful of pilot users first. Resolve edge cases before everyone else follows.
6. Document and train. Staff need to know what's changing and why, and what to do if they run into problems.
7. Automate provisioning. Via SCIM, some IdPs connect to HR systems: a new starter in the HR tool automatically gets an account in every relevant app.

For an SME using 20 to 30 apps, expect 2 to 6 weeks of work, depending on how complex your existing identity landscape already is.

When is SSO not worth it?

To be honest about the downsides: if you have a very small team (fewer than 10 employees) and hardly use any cloud apps outside Microsoft 365, the business case for SSO is thin. A good password manager plus MFA on your most important accounts already gives you 80 per cent of the benefit for 20 per cent of the cost. Once you grow to 20 employees or start using more SaaS, the balance tips quickly.

Likewise, if much of your work runs on on-premises legacy systems that don't support SAML or OIDC, SSO won't be complete, and you'll still need a separate solution for those apps.

Frequently asked questions about SSO for SMEs

What is the difference between SSO and a password manager? A password manager stores your individual passwords securely and fills them in automatically for each app. SSO replaces those individual passwords with a single central login at an identity provider. A password manager is a great starting point and works with any app; SSO requires the app to support SAML or OIDC, but gives you central auditing, fast offboarding and integration with MFA.

Is SSO more secure than separate passwords? Only if you combine it with strong MFA or passkeys. SSO without MFA is more efficient but not automatically more secure, because a compromised central account gives access to everything. With MFA on top, SSO is substantially more secure than a patchwork of separate passwords.

What does SSO cost for an SME with 50 employees? With Microsoft Entra ID P1 you'll pay around $7 per user per month, so roughly $4,200 a year for 50 users, unless you already use M365 E3 or E5 (where it's included). Okta's Starter Suite comes to about $3,600 a year for the same size. On top of that, allow €3,000 to €10,000 in implementation costs depending on the number of apps to connect.

Does every SaaS app support SSO? Almost every modern SaaS app supports SAML or OIDC, but many vendors only offer SSO in their more expensive tiers. This is known as the "SSO tax" and can undermine the business case. Check for each app whether SSO is included in your subscription and which tier you need.

What happens if my identity provider goes down? Then nobody can log in to the connected apps. With large providers such as Microsoft and Okta this rarely happens, but it's a real risk. Make sure critical accounts (such as your IT admin) have an emergency route, and consider break-glass accounts that don't go through SSO for crisis situations.

Conclusion

For SMEs, SSO isn't a luxury or hype but one of the most effective ways to improve password security and reduce operational overhead at the same time. The numbers almost always add up once you use more than a handful of SaaS apps and have more than 20 employees. Always combine it with strong MFA or passkeys, choose an identity provider that fits your existing stack, and treat the rollout as a proper project with a pilot and documentation.

Want to know which SSO solution suits your environment, or do you urgently need something set up for cyber insurance, NIS2 or simply an overwhelmed helpdesk? TRON Group helps SMEs in the Netherlands select, roll out and integrate Entra ID, Okta or JumpCloud, including MFA and conditional access. Explore our cybersecurity services or call +31 85 303 5869 for a conversation without the sales pitch. TRON Group. Moving IT Forward: IT that works, grows and protects.