A Driving Log (or "Driving Hours Log") is a document that registers various information about the use of a vehicle. Consider completing a Driving Hours Log if you need to: Deduct car expenses in case you use your vehicle for business. It is also possible to file a Mileage Log with the IRS and claim a deduction in your annual tax return. Collect reimbursement from your employer. Additionally, document your gas consumption and mileage using a Gas Mileage Log. Practice driving. Those who need to practice driving can fill out a supervised Driving Log. Record the information about the supervised driving of a future drivers license holder and submit it with the application for this license. If you need a Driving Hours Log you may check out our library of templates below.