The simplest way is to use classes in QuickBooks or a similar tracking dimension in your accounting software. Create a class for each truck in your fleet using the truck number or a unique identifier. When you record income from a tow job, assign it to the class for the truck that performed it.

Setting this up takes some initial work but saves time later. Create your chart of accounts with income categories for different tow types. Roadside assistance, accident recovery, impound tows, and long-distance hauls should all have separate categories. Then add classes for each vehicle. Every invoice or deposit gets both a category and a class. The category tells you what kind of work generated the revenue. The class tells you which truck earned it.

Code every single job to the truck that did it. This has to happen at the time of billing, not weeks later when you’re trying to remember which truck went out for that late-night impound. If your dispatcher tracks jobs in a spreadsheet or dispatch software, include the truck number so the information transfers to your bookkeeping. A Detroit bookkeeping service familiar with fleet operations can help configure your system correctly from the start.

Tracking income alone only shows half the picture. You need to track expenses by truck too. Fuel purchases, maintenance and repairs, tires, insurance allocation, and any equipment installed on specific trucks should all be coded to the vehicle. When you enter a fuel receipt, assign it to the truck that was filled up. When you pay for a transmission repair, assign it to that vehicle. This gives you true profitability by truck, not just gross revenue.

Run a profit and loss report by class monthly or quarterly. You’ll see which trucks generate the most revenue, which have the highest expenses, and which are actually profitable after costs. A truck might do the most tows but also burn through fuel and need constant repairs. That’s not your best performer. Another truck might do fewer jobs but net more profit because it runs efficiently.

The data only works if you capture it consistently. Train anyone who handles invoicing or data entry to always assign the truck class. If you’re a one-person operation doing your own books, build the habit now before the fleet gets bigger. Transportation and logistics companies that track by vehicle make better decisions about fleet expansion, driver assignments, and equipment purchases.

This level of tracking helps you answer real questions. Which truck should you replace first? Which driver and truck combinations perform best? Should you add another flatbed or another wheel-lift? Without vehicle-specific income data, you’re guessing. With it, the numbers tell you where to invest and where to cut.