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Building and Construction Authority

CONQUAS for Public Projects

Developed to incentivise quality workmanship in the Built Environment sector, the Bonus Scheme for Construction Quality (BSCQ) awards bonuses to contractors with CONQUAS® scores above stipulated standards. Conversely, under this scheme, contractors with poor workmanship are also penalised. The scheme applies to public projects with construction tender called before 15 October 2024.

Last updated 14 March 2026

Please note that the BSCQ will be discontinued from 15 October 2024. It will no longer apply to public sector project tenders called from this date onwards.

For ongoing projects under the BSCQ, any applicable bonuses, discounts, debarments, and downgrading will still be honoured until completion.

However, with the cessation of the BSCQ, CONQUAS remains a mandatory requirement for all public sector construction tenders called under the BCA Construction Workhead (CW01 – General Building) with an estimated construction cost (excluding contingency sum) of S$10 million and above.

For more details, please refer to the official circular [PDF, 147 KB].

Bonus Scheme for Construction Quality (BSCQ)

image of sunset over public housing estate

The BSCQ incentivises better workmanship in the built environment sector. Contractors receive bonuses if their (Construction Quality Assessment System) CONQUAS® scores exceed stipulated standards and face penalties if scores are poor. Merit points can offset default points. In joint ventures, all partners receive the same merit and default points.

Applicability

The BSCQ applies to: 

  • Both local and foreign contractors 

  • All CW01 contracts for new public sector building projects valued above S$5 million* 

  • Public sector projects combining new building works with other works like upgrading, alterations, and additions 

*The scheme applies to the effective contract sum for new building works. For such works, this sum refers to the amount stated in the Letter of Award.

If a project includes both new building works and other works—such as demolition, upgrading, additions and alterations, renovation, or conservation—the effective contract sum will be the portion of the total cost that the procurement agency estimates is for new building works. This includes design, piling, foundation, and M&E works, if done by the same main contractor.

In these cases, the effective contract sum is fixed at the tender stage as a percentage of the full contract sum.

The BSCQ applies only if the effective contract sum is more than S$5 million.

Incentives

Incentive

Threshold

Details

Bonus and discount

3 points above and 3 points below the previous 24-month average CONQUAS® score for the relevant building category

  • A bonus/discount of 0.2% of the effective contract sum for each point scored above or below the applicable threshold score.

  • The bonus/discount will be subjected to a maximum of 3% of the effective contract sum or S$2 million, whichever is lower.

  • The bonus and discount element will be stated in the Invitation to Tender, so that all prospective contractors tender on the same basis, taking into account the bonus and discount premiums when submitting tender proposals.

Disincentives

Disincentive

Threshold

Details

Price-Loading

When a contractor accumulates default points in the latest 5 contracts

  • A price-loading of 0.2% for each default point, subject to a maximum of S$2 million, will be applied against any tender proposal by the contractor in the evaluation of tender.

  • BCA will circulate a price-loading list to agencies on the first working day of each month. It will indicate the net default points accumulated for the lastest 5 contracts completed by each contractor. The list will be valid for every tender where the closing date of the tender falls within that month.

  • The procurement agencies will evaluate the applicable tender based on the price-loading list. They will recommend the award of contract to the lowest effective tender. For Joint Venture, the price-loading factor used shall be the highest among partners.

Downgrading in Financial Grade of Registration

When a contractor accumulates more than 5 default points in the latest 5 contracts

  • The contractor will be downgraded by one grade for up to a period of 12 months.

  • Upon downgrade, all merit and default points accorded to the contractor will be set to zero.

Debarment

When a contractor accumulates 10 or more default points in the latest 5 contracts

  • The debarment is based on the BCA current contractor’s registry system.

  • Upon debarment, all merit and default points accorded to the contractor will be set to zero.

Find the bonus/discount threshold scores:

Find the Price Loading in this list:

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