Communique on Price Increase Rates to be Applied in Project and Control Works
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This Turkish regulation, effective from 1 January 2026, establishes updated price adjustment coefficients for public sector project and supervision (kontrolluk) contracts. It provides specific multipliers for contracts signed in different periods from 2001 through the first half of 2026. The highest coefficient is 243.795 for early 2001 contracts, decreasing over time to 1.000 for contracts signed in the first half of 2026. These figures represent the price escalation factor to be applied when calculating price differences according to the relevant Cabinet Decree. The communique also explains how to calculate coefficients for 1980-2000 contracts by multiplying the old coefficient by 25.701. It repeals the previous version published in 2025.
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Key Changes
- New price increase coefficients published effective 1 January 2026 for project and kontrolluk contracts
- Coefficient of 243.795 set for 2001 first period (1 Jan - 14 Apr) contracts
- Coefficient of 1.000 set for 2026 first period (1 Jan - 30 Jun) contracts
+ 3 more changes with Pro
Obligations
What this law requires
Apply the specified price adjustment coefficients to public sector project and supervision (kontrolluk) contracts based on the contract signing period, effective from 1 January 2026
Use the correct coefficient matching the specific contract signing period (e.g., 243.795 for 1 January - 14 April 2001 contracts; 1.000 for 1 January - 30 June 2026 contracts) when calculating price differences
For contracts signed between 1980-2000, calculate price adjustment coefficients by multiplying the original period coefficient by 25.701
Cease application of the previous price increase rates communique published on 7 August 2025 (Official Gazette No. 32979) and implement only the new coefficients from this 2026 communique
Apply price adjustments according to the Cabinet Decree dated 28/7/1988 (No. 88/13181) using the coefficients provided in this communique