CIDB Grading Explained: Which Grade You Need to Bid
How CIDB grading works for construction tenders in South Africa: the grades, the contract value each allows, classes of works, how to register and how to upgrade.
If you bid on a public construction tender above your CIDB grade, you are disqualified automatically — no matter how good your price is. Grading is the first thing evaluators check on built-environment tenders, so it is worth understanding before you waste a week on a bid you cannot legally win.
What the CIDB is
The Construction Industry Development Board registers contractors and grades them by the size of work they are competent and financially able to deliver. Public-sector construction tenders specify a minimum CIDB grade and a class of works; you must hold both to be eligible. Register at cidb.org.za.
The grades, from 1 to 9
Grades run from 1 (smallest contracts) up to 9 (the largest, effectively uncapped). Each grade caps the tender value you may be awarded — a Grade 3 contractor cannot be awarded a contract sized for Grade 5. The exact rand thresholds are reviewed periodically, so always confirm the current band for your grade on the CIDB website and the threshold stated in the tender.
Classes of works matter as much as the number
- GB — general building
- CE — civil engineering
- EB / EP — electrical engineering (building / infrastructure)
- ME — mechanical engineering
- SQ — specialist works
A Grade 6 CE registration does not let you bid a Grade 6 GB tender. Match both the grade and the class to the tender.
How to upgrade
Your grade is based on your available financial capability and your largest completed contract of the right class. You move up by completing larger qualifying projects and demonstrating the financial capacity for the next band. Keep your registration active — a lapsed CIDB registration disqualifies you just as a too-low grade does.
Frequently asked questions
What CIDB grade do I need for a tender?+
Each construction tender states a minimum grade and a class of works (for example, Grade 4 GB). You must hold at least that grade in that class to be eligible — bidding above your grade is an automatic disqualification.
How many CIDB grades are there?+
Nine. Grade 1 covers the smallest contracts and Grade 9 the largest (effectively uncapped). The rand value each grade allows is reviewed periodically — check the current band on cidb.org.za.
Does CIDB registration expire?+
Yes, CIDB registration must be renewed and kept active. A lapsed registration disqualifies your bid even if your grade is high enough.
What is a class of works?+
The discipline of construction — e.g. GB (general building), CE (civil engineering), EB/EP (electrical), ME (mechanical). Your grade applies within a class, so match both to the tender.
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