Is the contractor responsible for bill of quantities being in correct?

The contractor is generally responsible for ensuring that the bill of quantities (BoQ) is accurate and reflects the work to be performed. However, if the BoQ is provided by the client or their representative, the contractor may only be responsible for discrepancies that arise during the execution of the work. It's essential for both parties to review the BoQ thoroughly before work begins to avoid disputes later. Ultimately, the specific terms of the contract will dictate the level of responsibility.