Final account
Construction contracts generally provide some mechanism for the final payment to be made to the contractor on completion of the works described in the contract. Generally this payment will be made at the end of the defects liability period providing that all patent defects have been rectified.
Preparing the final account is the process of calculating and agreeing any adjustments to the contract sum (the amount originally set out in the contract to be paid to the contractor for completion of the works) so that the amount of the final payment can be determined. The amount of the final payment is then set out in the final certificate (or final statement). It is possible for the final certificate to show that money is owed to the client, rather than due to the contractor.
Construction contracts may not specifically require the preparation of a final account, although they generally do require the contractor to provide all documents necessary for the adjustment of the contract sum within a specified time, and set out the time scale for and consequences of issuing the final certificate.
The contract sum may need to be adjusted for a number of reasons, including:
- Variations.
- Fluctuations.
- Prime cost sums.
- Provisional sums.
- Payments to nominated sub-contractors or nominated suppliers.
- Statutory fees.
- Payments relating to the opening-up and testing of the works.
- Loss and expense.
- Liquidated and ascertained damages.
- Contra claims imposed as a result of the contractor's operations (such as a third-party claim resulting from contractor negligence or contractual breach, for example, flooding a neighbour's property).
- The release of any remaining retention.
Agreeing the final account can be a complicated, time consuming and adversarial process, often resulting in disputes. The process can be made easier if adjustments to the contract sum are agreed as the project progresses rather than saving them up for the end. It is also beneficial if the client's quantity surveyor and the contractor's quantity surveyor work together on drafts of the final account before agreement is sought. It is preferable that a draft copy of the final account is signed off by the contractor as an 'in full and final settlement' prior to issue.
Agreement of the final account will allow the contract administrator to issue the final certificate. The final certificate is conclusive that all patent defects have been remedied, all adjustments to the contract sum have been agreed and all claims settled. Latent defects may still become apparent after completion of the contract and these may give rise to action for damages, for breach of contract or negligence.
Where proceedings have begun in relation to a dispute, the conclusiveness of the final certificate is subject to the findings of those proceedings.
In addition, the final certificate itself can be disputed (usually within 28 days). Adjudication, arbitration or other dispute resolution procedures may then be necessary to resolve the dispute. The final certificate is then only conclusive in relation to matters that are not disputed.
If the client intends to pay a different amount from that shown on the certificate, they must give notice to the contractor of the amount they intend to pay and the basis for its calculation (a 'pay less notice' - see Housing Grants, Construction and Regeneration Act for more information).
See also: Outturn cost.
[edit] Related articles on Designing Buildings
- Accounting.
- Campaign for cash retentions reform.
- Contract sum.
- Contract sum analysis.
- Cost consultant.
- Cost plans.
- Cost reporting.
- Cost value reconciliation.
- Defects.
- Escrow.
- Final certificate.
- Fluctuations.
- Housing Grants, Construction and Regeneration Act.
- Liquidated damages.
- Loss and expense.
- New Rules of Measurement.
- Outturn cost.
- Pre-tender estimate.
- Prime cost sums.
- Provisional sums.
- Retention bond.
- Scott schedule.
- Tender pricing document
- Variations.
- Whole-life costs.
Featured articles and news
The Home Energy Model and its wrappers
From SAP to HEM, EPC for MEES and FHS assessment wrappers.
Future Homes Standard Essentials launched
Future Homes Hub launches new campaign to help the homebuilding sector prepare for the implementation of new building standards.
Building Safety recap February, 2026
Our regular run-down of key building safety related events of the month.
Planning reform: draft NPPF and industry responses.
Last chance to comment on proposed changes to the NPPF.
A Regency palace of colour and sensation. Book review.
Delayed, derailed and devalued
How the UK’s planning crisis is undermining British manufacturing.
How much does it cost to build a house?
A brief run down of key considerations from a London based practice.
The need for a National construction careers campaign
Highlighted by CIOB to cut unemployment, reduce skills gap and deliver on housing and infrastructure ambitions.
AI-Driven automation; reducing time, enhancing compliance
Sustainability; not just compliance but rethinking design, material selection, and the supply chains to support them.
Climate Resilience and Adaptation In the Built Environment
New CIOB Technical Information Sheet by Colin Booth, Professor of Smart and Sustainable Infrastructure.
Turning Enquiries into Profitable Construction Projects
Founder of Develop Coaching and author of Building Your Future; Greg Wilkes shares his insights.
IHBC Signpost: Poetry from concrete
Scotland’s fascinating historic concrete and brutalist architecture with the Engine Shed.
Demonstrating that apprenticeships work for business, people and Scotland’s economy.
Scottish parents prioritise construction and apprenticeships
CIOB data released for Scottish Apprenticeship Week shows construction as top potential career path.
From a Green to a White Paper and the proposal of a General Safety Requirement for construction products.
Creativity, conservation and craft at Barley Studio. Book review.
The challenge as PFI agreements come to an end
How construction deals with inherited assets built under long-term contracts.
Skills plan for engineering and building services
Comprehensive industry report highlights persistent skills challenges across the sector.
Choosing the right design team for a D&B Contract
An architect explains the nature and needs of working within this common procurement route.
Statement from the Interim Chief Construction Advisor
Thouria Istephan; Architect and inquiry panel member outlines ongoing work, priorities and next steps.




























Comments
[edit] To make a comment about this article, or to suggest changes, click 'Add a comment' above. Separate your comments from any existing comments by inserting a horizontal line.