> ## Documentation Index
> Fetch the complete documentation index at: https://harnesscalendar.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# Mileage
> Mileage is a log of the business trips you drive, kept for each vehicle.
If you drive to students' homes, gigs, or a second studio, a mileage log is the record your tax preparer asks for. Add each car once, then log trips as you drive them. Car costs like gas and parking are [expenses](/docs/expenses) tied to the same car, so each vehicle's page shows its miles and its costs together.
## Add a vehicle
Every trip belongs to a vehicle, so start by adding your car.
Go to **Settings → Business records** and click **+** (**Add vehicle**).
Fill in the **Year**, **Make**, and **Model**. A **Description** like the trim or color is optional, and helps if you drive two similar cars.
Click **Add vehicle**. It joins your list, ready for trips.
You can also add one when you record a car expense: the **Vehicle** list has an **Add vehicle** option. To edit or delete a vehicle, use the **⋯** menu on its row.
## Log a trip
Log each trip close to when you drive it. A log written at the time is stronger evidence than one pieced together later, and Harness reminds you when a trip's date is far in the past.
Open the vehicle from **Settings → Business records** and click **Log mileage**. From any page, you can also press `Shift`+`M`; with more than one vehicle, pick which one (see [keyboard shortcuts](/docs/keyboard-shortcuts)).
Enter the date, miles, origin, destination, and purpose. The date starts as today. **Origin** and **Destination** suggest addresses as you type, but a plain name like "Home studio" works too.
Click **Log trip**. The trip lands in that vehicle's mileage log.
## Your mileage records
Each vehicle's page keeps its records on two tabs. **Mileage log** lists every trip, newest first; click one to see its purpose or edit it, and use its **⋯** menu to delete it. **Linked expenses** lists the car costs tied to this vehicle: when you record an expense in the **Car & Truck Expenses** [category](/docs/expenses#categories), you pick the vehicle it's for. The **Business records** list adds up each vehicle's **Lifetime miles**.
Trips are records, not money. They don't appear in your [reports](/docs/reports) or balances, and Harness doesn't apply a mileage rate or work out a deduction. Mileage is on every plan.
Deleting a vehicle permanently deletes every trip logged for it. Its car expenses stay in your books.
## FAQ
No. You type each trip's miles yourself. Harness doesn't use GPS or work out the distance from the addresses.
No. Harness keeps the log and each vehicle's total miles. You or your tax preparer apply the mileage rate.
Trips are records, not money, so they stay with the vehicle. Car costs you record as expenses, like gas and parking, do show in your [Profit & Loss](/docs/reports#profit-and-loss).
There's no export or report for trips. Each vehicle's full log is on its **Mileage log** tab.
A trip stays on the vehicle it was logged for. Delete it and log it again on the other vehicle.
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