Price change calculation
Compare baseline and current input prices and calculate an adjustment using the agreed eligible proportion.
by Jack Butler-Kettle · About 2 min readShare
How to use it
Record the contract provision, base date, current date and comparable source. An observed price increase is not automatically recoverable.
Price change calculation
Record the contract provision, base date, current date and comparable source. An observed price increase is not automatically recoverable.
Free blank template for your own project. The completed example is shown below. No email address required.
View the completed example
Completed fictional example
Westhaven refurbishment · 14 October 2026 · Version 1.0
Price change calculation
Scroll across if needed to read the whole record. A dash means no value has been entered.
| Item / source | Quantity | Base unit price (£) | Current unit price (£) | Eligible proportion | Calculated adjustment (£) | Contract basis / status |
|---|---|---|---|---|---|---|
| Steel sections / supplier Q-01 and Q-18 | 10 | £800.00 | £920.00 | 100% | £1,200.00 | Illustrative agreed price adjustment for 10 tonnes |
| Board / supplier Q-02 and Q-19 | 500 | £8.00 | £9.00 | 0% | £0.00 | Fixed-price item; no adjustment basis identified |
Eligible proportion is 1 for 100% and 0 for none. The £1,200 example adjustment assumes an express agreed basis; it is not a statutory escalation entitlement.
Understanding your results
Eligible proportion is 1 for 100% and 0 for none. The £1,200 example adjustment assumes an express agreed basis; it is not a statutory escalation entitlement.
How it works
The workbook provides blank working records. Grey cells calculate from the entered inputs; yellow cells are for your information. The completed example stays on this page.
Read the related guidance for the context and checks behind this template.
If you need help preparing or reviewing the project records, our quantity surveying services explain the tasks available under a separate appointment. Agree the deliverable, responsibilities and required specialist input before work starts.