Fleet Cost Management — Tracking Fuel, Maintenance & Depreciation for Your South African Transport Business

In the transport and logistics industry, your fleet is both your biggest asset and your biggest cost. Fuel, maintenance, tyres, insurance, financing costs, and depreciation — these expenses can consume 60-80% of your revenue if not actively managed. And yet many transport businesses in South Africa track these costs poorly, making it impossible to know whether individual routes, vehicles, or contracts are actually profitable.

This guide is for South African transport and logistics business owners who want to build a proper fleet cost management system — and get financial clarity on their operations.

The Key Cost Categories to Track

1. Fuel Costs

Fuel is typically the single largest variable cost in any transport business. To manage it properly, you need more than just a monthly total — you need fuel cost per kilometre, per vehicle, and ideally per route or contract. This allows you to identify inefficient vehicles, drivers with poor fuel consumption habits, and routes where your pricing doesn't cover your costs.

Best practice: use a fleet fuel card (many South African fuel companies offer these) so that every fuel purchase is automatically linked to a specific vehicle. This data feeds directly into your cost-per-kilometre calculations.

2. Maintenance and Repairs

Unplanned maintenance is a cash flow killer in transport businesses. A vehicle off the road means lost revenue and often emergency repair costs. Tracking maintenance costs per vehicle — both planned and unplanned — helps you identify vehicles that are costing more to maintain than they generate, and plan replacement cycles proactively.

Every maintenance invoice should be captured in your accounting system against the specific vehicle, not just as a general expense. This gives you a full service history with financial data for each asset.

3. Vehicle Depreciation

This is the most commonly overlooked cost in transport businesses. Depreciation is not a cash expense — it doesn't come out of your bank account each month — but it is a real cost. Your trucks and vehicles are losing value, and when you eventually need to replace them, that cost will be significant.

SARS allows specific depreciation rates for vehicles and transport equipment under the Income Tax Act. Your accountant should be applying the correct rates and ensuring your depreciation is both accurately reflected in your management accounts and correctly treated for tax purposes.

4. Driver Payroll and Labour Costs

Driver salaries, overtime, PAYE, UIF, and SDL contributions are a significant cost centre in any transport business. Common issues we see include:

• Drivers paid in cash with no payroll records — creating PAYE and UIF liability
• Overtime not correctly calculated under the BCEA
• No employment contracts, creating labour dispute risk
• Subsistence and travel allowances incorrectly treated for tax

Every driver's remuneration should run through a proper payroll system with monthly payslips, IRP5 certificates at year end, and correct PAYE submissions to SARS.

5. Insurance and Licensing

Vehicle insurance, goods-in-transit insurance, operator licences, and roadworthy certificates are fixed costs that need to be budgeted for and tracked per vehicle. These are often lumped together as a single "insurance" expense — but tracking them per vehicle gives you a true picture of each asset's total cost of ownership.

The Operating Ratio — Your Key Performance Metric

The operating ratio is the most important financial metric in transport: it measures total operating expenses as a percentage of revenue. A well-run transport business should target an operating ratio below 90% — meaning at least 10 cents of profit for every R1 of revenue.

Operating Ratio = (Total Operating Expenses ÷ Revenue) × 100

Track this ratio monthly, per vehicle, and per contract. If a particular contract has an operating ratio above 95%, you're barely breaking even — and once depreciation and financing costs are factored in, you may actually be losing money on it.

Route and Contract Profitability Analysis

Beyond the overall operating ratio, the most valuable analysis for a transport business is profitability by route or by client contract. This requires allocating all costs — fuel, driver wages, maintenance, depreciation — to specific routes or contracts.

Many transport businesses are shocked when they do this analysis for the first time and discover that their largest client or their longest route is their least profitable. Without this data, you're pricing on gut feel — and often subsidising unprofitable work with profits from elsewhere.

Cash Flow Management in Transport

Transport businesses face a structural cash flow challenge: large clients (retailers, manufacturers, government) often pay on 30-60 day terms, while fuel, driver wages, and maintenance costs are due immediately. This mismatch can put even a profitable transport business under severe cash pressure.

Managing this requires a rolling 13-week cash flow forecast — knowing exactly what cash is coming in, when, and what commitments need to be paid. Without this visibility, you're always reacting to cash crises rather than planning around them.

How TrueBalance Helps Transport Businesses

We provide transport and logistics businesses with a complete financial management service — from monthly bookkeeping and vehicle cost tracking, to driver payroll management, VAT submissions, and monthly management accounts that show you route-by-route profitability and your true operating ratio. We give you the financial clarity to make confident decisions about your fleet.