In short
- With a side business, exactly the same rules apply as for a main activity.
- Only record trips for your side business.
- Give your accountant an export from My Rides.
The same rules for your car costs
| Status | Trip type | Rate | Valid |
|---|---|---|---|
| Sole trader | Business trips | Actual car costs | n/a |
| Sole trader | Commuting by car | €0.15/km | income year 2026 |
| Sole trader | Commuting by bike | €0.37/km, max 25 km per trip | income year 2026 |
| Company director or employee | Business trips, own car | up to €0.4761/km tax-free | 01-07-2026 to 30-06-2027 |
Employers can also use a quarterly rate. Indicative, discuss with your accountant.
As a self-employed professional, you cannot grant yourself the €0.4761/km (01-07-2026 to 30-06-2027). Your log shows which share of your car costs belongs to your side business.
Proportional deduction
Record only the kilometers for your side business, not those for your main job. Commuting for your main job does not count either.
Typical situations
- Weekend entrepreneur: a client visit on Saturday. Business trip.
- Evening activity: after your day job, a training for your side business. Business trip.
- Mixed use: the same car for both. Record your side business trips separately.
Social contributions
With a side activity, you pay lower social contributions as long as your net taxable income stays below a threshold. Business expenses such as car costs can lower that income, and so your contributions.
Start recording immediately
Even a few trips a week add up over a year. My Rides costs €4.99/month and keeps every trip with date, address and route. Export an overview for your accountant, who handles it in your tax return.
