# Fleet maintenance: cost control in practice

> How to control fleet maintenance costs: preventive vs corrective, cost per km, tax deduction, and corporate card integration.

**Author:** Camila Ribeiro — Field Operations Editor  
**Reviewed by:** Marina Costa — Brazilian Tax & Compliance Specialist  
**Published:** 2026-08-05  
**Updated:** 2026-08-05  
**Last reviewed:** 2026-08-05  
**URL:** https://quilometragem.com/blog/fleet-maintenance-cost-control-in-practice

**TL;DR:** Maintenance costs represent 15-25% of total cost per km in light fleets. The difference between preventive and corrective is not just cost - it is control.

- Preventive maintenance on schedule reduces corrective costs by 30-40%.
- For Receita Federal, maintenance is a deductible operating expense.
- Recording maintenance with NF-e + plate is the minimum for audit.
- Essential KPI: maintenance cost per km per vehicle, updated monthly.
- Maintenance log template available for systematic control.

This article is available in full in Brazilian Portuguese. Maintenance represents 15-25% of cost per km. Preventive pays off: reduces corrective costs by 30-40%. KPIs and fiscal checklist.

## Frequently asked questions

### Is fleet maintenance tax-deductible?

Yes. Preventive and corrective maintenance of vehicles used in core business is deductible as operating expense in Lucro Real, per RIR/2018 Art. 346. Requires NF-e with vehicle plate.

### How to record maintenance for Receita Federal?

Each maintenance service must have: NF-e from the supplier with plate identification, Service Order describing work and replaced parts, and accounting entry in fleet maintenance expense account.

### What is the average fleet maintenance cost per vehicle in Brazil?

According to CNT data, maintenance costs for light corporate fleet vehicles represent 15-25% of total operating cost per km.

### Does preventive maintenance really pay off financially?

Yes. A preventive service can prevent a timing belt failure costing 4-8x more in engine repair. Plus, vehicle downtime in emergency corrective maintenance generates additional operational cost.

### How to distinguish maintenance from capital improvement for tax purposes?

Maintenance restoring the asset to original state (oil change, brakes, tires, belts) is a deductible expense. Modification increasing capacity or value (winch, refrigerated body) is a capital improvement.

## Sources

- [CNT - Custos de manutenção por tipo de veículo em frotas corporativas 2024](https://www.cnt.org.br/pesquisa-custos-operacionais) — Confederação Nacional do Transporte (2026-07-20)
- [Receita Federal - RIR/2018 Art. 346: manutenção vs. benfeitoria para fins fiscais](https://www.planalto.gov.br/ccivil_03/_Ato2015-2018/2018/Decreto/D9580.htm) — Presidencia da República (2026-07-20)