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Guide: Smart Cost Management with Rising Fuel Prices

20 March 2026·4 min read

Smart Cost Management with Rising Fuel Prices

Practical Optimization Guide for Businesses

In a context of growing volatility in energy markets, companies that depend on vehicle fleets, freight transport, or frequent travel face a permanent challenge: how to control fuel costs without compromising operations.

This guide brings together the most effective strategies - from behavioral changes and technology to process review and energy alternatives - so your company can reduce its fuel bill sustainably and measurably.

Optimization Measure	Estimated Savings	Return Period
Fleet telematics monitoring	10% - 20%	3 - 6 months
Efficient driving training	8% - 15%	1 - 3 months
Regular preventive maintenance	5% - 12%	Immediate
AI-powered route optimization	12% - 25%	2 - 4 months
Remote/hybrid work policy	15% - 30%	Immediate
Electric/PHEV vehicle adoption	40% - 60%	1 - 3 years

1. Start with Diagnosis: What You Don't Measure, You Can't Manage

Before implementing any measure, it's essential to have a clear view of current consumption. Many companies are unaware of their actual usage patterns and miss opportunities for immediate savings.

How to conduct the diagnosis

Centralize all refueling records by vehicle and driver

Calculate the average consumption per 100 km for each vehicle

Identify the routes with the highest cost and lowest efficiency

Compare actual consumption with manufacturer specifications

Detect anomalous patterns: off-hours consumption, route deviations, excessive refueling

2. Efficient Driving: The Human Factor Is Worth Up to 15%

Driving behavior is one of the biggest determinants of consumption. European studies show that aggressive driving can increase consumption by up to 40% compared to smooth, anticipatory driving.

Best practices to implement

Accelerate progressively and anticipate braking - avoid sudden starts

Drive at economical speed: between 80 and 110 km/h on highways

Use neutral mode on downhill slopes (where vehicles allow)

Turn off the engine for stops longer than 60 seconds

Keep tires at correct pressure - under-inflated tires increase consumption by up to 3%

3. Preventive Maintenance: Prevention Is Always Cheaper

A poorly maintained vehicle consumes significantly more fuel. Regular maintenance is not just a safety issue - it's a direct lever for energy savings.

Maintenance checklist for fuel savings

Clean air filters: a clogged filter increases consumption by up to 10%

Engine oil at manufacturer-recommended viscosity

Spark plugs in good condition (gasoline engines)

Calibrated injection system with no leaks

Aligned and balanced tires - estimated savings of 1% to 3%

4. Route and Logistics Optimization

Route planning technology has evolved enormously. AI-powered tools can calculate itineraries that minimize distance, time, and consumption simultaneously, taking real-time traffic into account.

5. Financial and Tax Management of Fuel

Beyond operational measures, there are financial and tax mechanisms that allow optimizing the effective cost of fuel for the company.

Tax deductibility in Portugal

Fuel expenses for vehicles used in business activities are generally deductible for IRC

Electric and hybrid vehicles benefit from more favorable deductions

Mixed-use vehicle expenses have deductibility limits - keep rigorous records

6. Fleet of the Future: Electrification and Alternative Energies

Fleet electrification is no longer a future trend - it's now an economically viable reality for many companies, especially with the rising cost of fossil fuels.

Advantages of electric and PHEV vehicles for fleets

Energy cost per km 60% to 70% lower than an equivalent diesel vehicle

Simpler and more economical maintenance

Tax benefits in IRS/IRC and ISV exemption in Portugal for 100% electric vehicles

7. Action Plan: Where to Start

Implementation should be phased. Prioritize immediate-impact actions with lower investment and use the savings generated to finance longer-term measures.

Conclusion

The price of fuel is not under companies' control - but consumption is.

With the right measures, it's possible to reduce fleet energy costs by 20% to 40% without compromising operations, combining behavioral changes, technology, and medium-term strategic decisions.