Escalation clause
An escalation clause is a provision that may be included in a construction contract to allow for adjustments in the contract price based on fluctuations in the cost of materials, labour, or other project-related expenses. This clause is designed to manage the risk associated with price volatility over the duration of a project. Escalation clauses are commonly used in long-term projects or those involving significant amounts of raw materials that are subject to market fluctuations. They are particularly relevant in times of economic instability or high inflation.
The primary purpose is to protect both the contractor and the client from the financial impact of significant cost changes that could not have been anticipated at the time of contract signing. It ensures that contractors are not unfairly penalised by unforeseen price increases and that clients are not overcharged.
The clause typically specifies the conditions under which price adjustments can be made. Common triggers include:
- Increases in the cost of materials.
- Changes in labour costs due to new wage agreements or labour shortages.
- Variations in fuel or transportation costs.
Escalation clauses may be calculated based on:
- A predetermined percentage increase at specified intervals.
- Adjustments based on actual cost changes, with detailed documentation.
- Adjustments based on specific cost indexes relevant to the construction industry.
This provides a transparent and objective method for determining the price changes. The contract will also outline how often price adjustments can be made. This might be on a monthly, quarterly, or milestone basis, depending on the length and nature of the project.
To prevent excessive adjustments, escalation clauses may include caps or limits on the amount by which the contract price can be increased. This protects clients from unlimited cost escalation and provides a clear framework for managing potential increases.
The contractor is usually required to provide detailed documentation supporting any claimed increases, and there may be a requirement for prior notification before adjustments are applied. This ensures transparency and allows for verification by the client or their representatives.
See also: Fluctuations and Escalation.
[edit] Related articles on Designing Buildings
Featured articles and news
UKCW London to tackle sector’s most pressing issues
AI and skills development, ecology and the environment, policy and planning and more.
Managing building safety risks
Across an existing residential portfolio; a client's perspective.
ECA support for Gate Safe’s Safe School Gates Campaign.
Core construction skills explained
Preparing for a career in construction.
Retrofitting for resilience with the Leicester Resilience Hub
Community-serving facilities, enhanced as support and essential services for climate-related disruptions.
Some of the articles relating to water, here to browse. Any missing?
Recognisable Gothic characters, designed to dramatically spout water away from buildings.
A case study and a warning to would-be developers
Creating four dwellings... after half a century of doing this job, why, oh why, is it so difficult?
Reform of the fire engineering profession
Fire Engineers Advisory Panel: Authoritative Statement, reactions and next steps.
Restoration and renewal of the Palace of Westminster
A complex project of cultural significance from full decant to EMI, opportunities and a potential a way forward.
Apprenticeships and the responsibility we share
Perspectives from the CIOB President as National Apprentice Week comes to a close.
The first line of defence against rain, wind and snow.
Building Safety recap January, 2026
What we missed at the end of last year, and at the start of this...
National Apprenticeship Week 2026, 9-15 Feb
Shining a light on the positive impacts for businesses, their apprentices and the wider economy alike.
Applications and benefits of acoustic flooring
From commercial to retail.
From solid to sprung and ribbed to raised.
Strengthening industry collaboration in Hong Kong
Hong Kong Institute of Construction and The Chartered Institute of Building sign Memorandum of Understanding.
A detailed description from the experts at Cornish Lime.























