What is the legal mobility budget?

The legal mobility budget is a sustainable and fiscally advantageous alternative to the company car.

Employees with (the right to) a company car may trade it in for a generous budget.

You calculate the budget based on the Total Cost of Ownership of the current company car.

Your employees can spend their mobility budget on environmentally friendly mobility options, divided over 3 pillars.

Thanks to its great flexibility, the mobility budget is Belgium’s most advantageous and flexible remuneration model.


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Spend the mobility budget on 3 pillars

  • Pillar 1

    Pillar 1

    Environmentally friendly company car
  • Pillar 2

    Pillar 2

    Sustainable mobility and housing costs
  • Pillar 3

    Pillar 3


How does the mobility budget work?

Step 0. Calculate the mobility budget based on the Total Cost of Ownership.

The Total Cost of Ownership of the current company car determines your employee’s mobility budget.

This TCO includes, among other things …

  • The monthly lease or rental price of the company car
  • Fuel costs
  • Insurance
  • CO2 solidarity contribution
  • Non-deductible VAT
  • Corporation tax on non-deductible car costs

Step 1. Opt for an environmentally friendly company car in pillar 1.

In pillar 1, your employee has two choices:

  • Give up the company car entirely.
  • Pick an eco-friendly company car.

The TCO of a new eco-friendly car is lower than the current one. This is due to reduced CO2 emissions or a lower list price.

Your employee spends the remaining amount on pillar 2 of the mobility budget.

Step 2. Choose sustainable mobility and housing costs in pillar 2.

In pillar 2, your employee spends the budget on all kinds of sustainable means of transport.

Think train, tram, bus and shared cars, bikes and steps. A wide range of alternatives to their company car!

There is also the option of spending the budget on housing costs: rent and mortgage loans.

This option is only possible if your employee lives within a 10-kilometre radius of the main workplace or if your employee works at least 50% from home.

Step 3. Disburse the remaining budget at the end of the year in pillar 3.

On 31 December of each calendar year, we take stock of the mobility budget. At that time, the employee’s remaining amount is paid out in cash.

This is done after deducting a special employee contribution of 38.07%. It is not possible to carry over the budget to a subsequent year.

Olympus Mobility provides you as an employer with a report showing the balance to be paid out to your employee.

No need to calculate anything yourself.

A calculation based on Total Cost of Ownership

A numerical example

Situation 1

Pillar 1


Pillar 2


Pillar 3


Suppose your employee Bart has an annual budget of €12,000. Each month he receives €1,000.

On the first of July, Bart decides to trade in his company car. Until the end of the year, he has €6,000 at his disposal.

In situation 1, Bart opts for an environmentally friendly company car in pillar 1. The new TCO is only €800 per month.

He is free to spend the remaining €200 on sustainable mobility or housing costs in pillar 2.

Situation 2

Pillar 1


Pillar 2


Pillar 3


If Bart only opts for pillar 2, he will have the full €1,000 per month available for alternative means of transport or housing costs.

Each month, he uses €800 of that amount, leaving €200 each time.

At the end of the year, Bart still has €2,400 available.

After deducting 38.07% special employee contribution on the remaining amount, you as an employer pay out €1,486.32 to Bart in pillar 3.

Manage the mobility budget with the Olympus platform

  • Easily manage all mobility budgets
  • Offer your employees the widest range of mobility services in one app
  • Leave administration to Olympus Mobility
  • Trusted by more than 800.000 users

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Webinar: the legal mobility budget with Silverfin

What is the legal mobility budget? How do you calculate it?

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The legal mobility budget: 5 benefits for companies

Doubting to implement the legal mobility budget in your company?

You are missing out on these 5 advantages without this tax-advantageous framework.

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