Background information

In response to the sharp increase in diesel prices linked to the Middle East crisis, Spain strengthened the mechanism for revising road freight transport prices when fuel costs vary. The measure was adopted through Royal Decree-law 9/2026 of 14 April on urgent measures in the field of transport. It modifies the road freight transport contract framework by making the fuel-price revision mechanism more automatic and enforceable. Where diesel prices change between contract agreement and service provision, the transport price must be adjusted using the official formula, and the resulting amount must be shown separately in the invoice. The measure aims to prevent hauliers, including SMEs and self-employed operators, from absorbing fuel price increases alone.

Content of measure

The measure applies to road freight transport contracts where the price of transport is affected by changes in the cost of diesel. It covers the contractual relationship between hauliers or road freight transport operators and their clients or contracting companies. Eligibility is based on the existence of a road freight transport contract subject to the Spanish legal framework. When diesel prices vary between the date when the contract is agreed and the date when the service is performed, the transport price must be revised using the official formula.

The measure does not provide direct financial support from public funds. Its economic effect consists of shifting part of the fuel-cost variation into the transport price paid by the client. The amount depends on the diesel price variation, the agreed transport price, the vehicle type and the official calculation formula.

Use of measure

Nofigures have yet been identified for this measure. It establishes a mandatory contractual price-revision mechanism for road freight transport services affected by diesel price changes. Therefore, the number of users will depend on the volume of road freight contracts in which fuel-price variation is applied after the entry into force of Royal Decree-law 9/2026. No official data are yet available on the number of contracts revised, hauliers benefiting from the mechanism, amounts passed on to clients, or effectiveness in protecting operators’ income.

Target groups

Workers	Businesses	Citizens
Does not apply to workers	Sector specific set of companies	Does not apply to citizens

Actors and funding

Actors	Funding
National government Employers' organisations Company / Companies	No special funding required

Social partners

Social partners' role in designing the measure and form of involvement:

	Trade unions	Employers' organisations
Role	No involvement	Consulted
Form	Not applicable	Direct consultation outside a formal body

Social partners' role in the implementation, monitoring and assessment phase:

• Unknown
• Main level of involvement: Unknown

Involvement

The measure was adopted by the Spanish Government through Royal Decree-law 9/2026, and no institutional requirement for a bipartite or tripartite agreement has been identified. However, road freight employer and sector associations had demanded stronger mechanisms to allow hauliers to pass on fuel cost increases to clients, and the measure responds to these concerns. Their contribution is mainly through representation of the sector’s interests, dissemination of information to affiliated operators and monitoring practical problems in applying the formula.

Views and reactions

Social partner reactions were generally supportive from the road freight sector. Road transport associations have been demanding a stronger mechanism to ensure that fuel cost increases could be passed on to clients, rather than absorbed by hauliers. In this sense, the mandatory and automatic nature of the revised mechanism was welcomed as a useful step to protect transport operators, many of them SMEs or self-employed workers. No specific trade union reaction to this contractual mechanism has been identified

Sectors and occupations

This case is not occupation-specific.

Sources

• 14 April 2026: Royal Decree-law 9/2026 of 14 April on urgent measures in the field of transport (www.boe.es)