📅 Updated July 2026
🏷 Spain · Diesel Tax · Fuel Taxation · Professional Transport
⏱ 3 min read
Spain has extended its temporary diesel support scheme until the end of September 2026. While the support continues, the way transport companies should calculate the real cost of diesel changes again from 1 July.
Key Takeaways
- Real Decreto-ley 18/2026 extends diesel support until 30 September 2026.
- Gasóleo Profesional refund under Article 52 bis remains €0/L throughout July, August and September.
- Extraordinary government aid continues instead of the normal refund.
- Effective diesel cost depends on taxes, temporary aid and supplier implementation—not only the pump price.
Support Timeline
Spain gradually changes the structure of diesel support
Although support remains approximately the same for eligible transport operators, Spain is gradually reducing direct government aid while increasing Hydrocarbon Tax rates.
| Month | Hydrocarbon Tax | Gasóleo Profesional Refund | Extraordinary Aid |
|---|---|---|---|
| July | 229 €/1,000L | €0/L | €0.10/L |
| August | 279 €/1,000L | €0/L | €0.15/L |
| September | 329 €/1,000L | €0/L | €0.20/L |
Why the Article 52 bis refund is €0/L
Because temporary Hydrocarbon Tax rates remain below the ordinary refund threshold established under Article 52 bis of Law 38/1992, the professional diesel refund itself remains zero. Instead, support is delivered through extraordinary direct government aid.
Why This Matters
The same litre of diesel may have different effective costs
For companies using fuel cards, wholesale contracts or multiple suppliers, legislative changes are not always reflected in commercial price feeds at the same time.
The effective diesel cost depends on:
- supplier price
- Hydrocarbon Tax
- VAT
- refundable taxes
- temporary government aid
- how each supplier applies legislative updates
As a result, two suppliers can publish similar prices while the actual net fuel cost differs.
How UNVERO Calculates Fuel Costs
Fuel optimisation today requires more than supplier prices
At UNVERO, we continuously monitor fuel legislation across Europe and verify how tax changes are reflected by fuel suppliers.
Whenever legislation changes, we communicate directly with suppliers where necessary to understand how prices have been implemented.
UNVERO calculates the actual net fuel cost using:
- ✔ Supplier price
- ✔ Applicable excise duty
- ✔ VAT
- ✔ Refundable taxes
- ✔ Temporary government support
This allows transport companies to optimise refuelling decisions based on the real cost of fuel—not simply the published price.
Need to understand how fuel tax changes affect your fleet costs?
UNVERO helps transport companies calculate the real cost of fuel by combining supplier prices, taxes, VAT, refunds and government support into one accurate view.
