Internal contract
An internal contract is one that exists between a principal and an agent, i.e. the agent is legally appointed to act on its behalf. An external contract is one that exists between a principal and a third party, usually with the facilitation of an agent.
A service level agreement (SLA) is a common type of internal contract, which sets out what a supplier/service provider is required to provide to the client, and to what standard.
For more information, see Service level agreement.
Internal contracts can be prepared within an organisation, i.e. between teams or departments, or used for the outsourcing of services, such as facilities management, IT services, and so on.
Some of the elements typically required in an internal contract include:
- Name of the principal/client.
- Name of the agent/supplier.
- The product and/or services to be provided.
- Start date.
- Estimate of the elapsed time required. (For SLAs, this takes the form of a renewal date.)
- Price and the terms of payment.
- Client’s accountabilities, i.e. what the client must do/provide in order for the supplier to successfully perform the contract.
- Risks and assumptions about external dependencies that may hinder the performance of the contract.
[edit] Find out more
[edit] Related articles on Designing Buildings Wiki
Featured articles and news
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.