Frequently Asked Questions

Do you need to log your business miles for the IRS?

Slacklog is a mileage log generator.

It only takes 15 minutes to generate a printable mileage report for your annual tax return. It's private and secure.

The cost is $10 with a Credit or Debit Card.

You answer a series of questions, and it creates a mileage log. You will receive a minimally formatted XLSX file with pre-filled data you can customize in your preferred spreadsheet editor.

Why Slacklog?

Using a mileage log allows you to accurately track your vehicle-related expenses, including fuel, maintenance, insurance, and depreciation. This helps you claim the correct deductions and ensures you don't overlook any eligible expenses.


Yes, it's highly advisable to use a mileage log when filing your U.S. tax return, especially if you use your vehicle for business or other deductible purposes. A mileage log is a crucial tool for accurately tracking and documenting your mileage-related expenses, and it offers several benefits when it comes to your tax return:
  1. Accurate Deductions: Maintaining a mileage log helps you accurately track the number of miles you drive for business, medical, charitable, or moving purposes. This accuracy is essential for claiming the correct deductions and ensuring you don't overstate or understate your expenses.
  2. IRS Compliance: The Internal Revenue Service (IRS) requires taxpayers to provide accurate and detailed records when claiming mileage deductions. A well-maintained mileage log helps you meet IRS requirements and minimizes the risk of an audit or penalties for inaccurate reporting.
  3. Documentation for Audits: In the event of an IRS audit, a mileage log serves as solid documentation to support your claims for vehicle-related deductions. It demonstrates that you have maintained proper records and can substantiate your deductions, reducing the chances of disputes or additional taxes owed.
  4. Cost Savings: Deducting mileage-related expenses can lead to significant cost savings by reducing your taxable income. This can result in a lower overall tax bill and more money in your pocket.
  5. Mileage Rate Flexibility: The IRS typically sets standard mileage rates that you can use to calculate your deduction. Having a mileage log allows you to choose between the standard mileage rate method or the actual expense method (where you deduct the actual costs of using your vehicle). Depending on your circumstances, one method may be more advantageous than the other, and a mileage log helps you make that determination.
  6. Personal vs. Business Use Differentiation: Keeping a mileage log helps distinguish between personal and business use of your vehicle. This ensures that you only claim deductions for eligible mileage, reducing the likelihood of IRS scrutiny or disputes.
  7. Future Planning: A mileage log can provide valuable insights into your vehicle expenses and usage patterns. This information can help you make informed decisions about your business operations, such as optimizing routes, reducing unnecessary travel, or considering alternative transportation options.
In summary, using a mileage log when filing your U.S. tax return is highly recommended, especially if you have deductible mileage expenses. It is a valuable tool for individuals and businesses looking to maximize their tax deductions while staying within the bounds of tax regulations. It helps ensure accuracy, compliance, and proper documentation, all of which are crucial when dealing with tax-related matters.

Deductions for Business Use

If you use your vehicle for business purposes, you can deduct the expenses related to that use. The Slacklog mileage log helps you track the number of miles you drive for business, which can be used to calculate your deduction. This can significantly reduce your taxable income and lower your tax liability.

Are you an accountant?

Interested in providing Slacklog to your clients? Contact us for a bulk license.

Tax day is coming

Get your mileage log early. This will give you time to adjust it and make it accurate.