SMSTS and SSSTS renewal: the 5-year rule with no grace period

An SMSTS certificate is valid for 5 years, and so is an SSSTS certificate. You renew either one by completing the refresher course before the expiry date: a 2-day refresher for SMSTS, a 1-day refresher for SSSTS. Miss that date — even by a single day — and the refresher route closes: you sit the full course again.

The courses at a glance

• SMSTS (Site Management Safety Training Scheme) — the CITB Site Safety Plus course for site managers. Full course: 5 days. Valid: 5 years.
• SSSTS (Site Supervision Safety Training Scheme) — the equivalent for site supervisors. Full course: 2 days. Valid: 5 years.
• SMSTS Refresher — 2 days, for holders of an in-date SMSTS. Resets validity for 5 years.
• SSSTS Refresher — 1 day, for holders of an in-date SSSTS. Resets validity for 5 years.

Neither course is a legal requirement in itself, but Build UK members and most principal contractors treat a valid SMSTS or SSSTS as a standard condition for anyone managing or supervising their sites. In practice: no valid certificate, no site role.

The hard rule: no grace period

This is the detail that catches people out. To sit the refresher, your current certificate must still be in date on the day of the course. There is no grace period, no discretion, no "it only just expired":

• Certificate expires on a Friday, refresher booked for the following Monday? Too late. That's the full course again.
• For a site manager, that's the difference between 2 days off site and 5 days off site — plus whatever the waiting list at the training provider adds.
• The refresher is also considerably cheaper than the full course, so a missed date costs money twice: course fees and lost days.

Compare that with a CSCS card, where renewal after expiry is a hassle but the route stays the same. With SMSTS and SSSTS, the date itself changes what you have to do.

Plan the refresher into year five

The sensible pattern is simple: book the refresher three to six months before expiry. That leaves room for a cancelled course, a clash with a project milestone, or a failed attempt — and refresher places at popular providers do book up. Some contractors set an internal rule that no certificate on their sites may be within 90 days of expiry, precisely to force this margin.

The certificate holder rarely tracks this themselves. Five years is long enough for the date to belong to nobody: the manager assumes the office is watching it, the office assumes the manager is. Then a client asks for the certificate at a pre-start meeting.

One list, automatic reminders

If you run more than a handful of supervisors and managers, their SMSTS and SSSTS dates belong in the same overview as their CSCS cards and first aid certificates — one training matrix, checked weekly. Our free training matrix template is a solid start, but a spreadsheet only works if someone opens it. A tool like Certly removes that dependency: it emails you 90, 60 and 30 days before each expiry date, which is exactly the margin a refresher booking needs. Given that one missed day turns a 1-day refresher into a 2- or 5-day course, that's cheap insurance — see pricing.