What is a tax write-off? How the deductions impact businesses taxable income

Expenses that contribute to running a business, like equipment, travel, rent and more can often be tax write-offs

Starting and running a small business is expensive. There are many different costs that go into operating a business, but many can be tax write-offs. 

For an expense to be deductible, the cost must be both "ordinary and necessary," according to the Internal Revenue Service (IRS). 

An ordinary expense is defined by the IRS as "one that is common and accepted in your industry," and a necessary expense "is one that is helpful and appropriate for your trade or business." 

worker at laptop

Tax write-offs are reported when a business files their taxes annually, so make sure you keep track of all your statements and other documents throughout the year so you have the information you need when it comes time to file. (iStock / iStock)

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When it comes to filing taxes as a business owner, it is extremely helpful to work with a tax professional who can help you navigate tax deductions. 

Below is more information about tax write-offs and common examples of business expenses that could be deductible. 

  1. What is a tax write-off?
  2. What kinds of expenses are considered tax deductions for businesses?
  3. How do I report tax deductions?

1. What is a tax write-off?

"A deduction is an amount you subtract from your income when you file so you don't have to pay tax on it," according to the IRS. 

Expenses can be deducted that are for your business, not ones that are for personal benefit, according to Investopedia. 

You can further look into what tax deductions you may be eligible for by using the IRS Tax Guide for Small Business. 

Working remote

Tax write-offs are subtracted from a company's overall income. (iStock / iStock)

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Diligently keeping track of all business finances throughout the year and working with a tax professional can also help make the filing process easier as a business owner. 

2. What kinds of expenses are considered tax deductions for businesses?

There are a multitude of expenses that could be considered tax deductions for your small business. Below are among the common examples. 

  1. Inventory
  2. Employee salaries
  3. Employee benefit programs
  4. Insurance
  5. Auto expenses
  6. Equipment rentals
  7. Office supplies
  8. Gifts and entertainment
  9. Debt interest
  10. Software subscriptions
  11. Bad business debts
  12. Utilities
  13. Taxes
  14. Advertising and marketing costs
  15. Travel
  16. Rent
  17. Contracted labor
  18. Legal fees

For each of these categories, the IRS dives far deeper into the details and stipulations. 

For example, when it comes to auto expenses, there are two different ways to claim this particular deduction. One is the standard mileage rate, where you add the miles you drove and multiply that by the IRS's standard deduction rate, according to Ramsey Solutions. 

Cars driving on the highway

Auto expenses are one cost of many that may qualify as a tax deduction. (Jonas Walzberg/picture alliance via Getty Images / Getty Images)

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Keep in mind that this number has fluctuated over time, but in 2024, the standard mileage rate is 67 cents per mile. 

You can also claim auto deductions by adding up all the car-related expenses you've had over the years, including gas, repairs, insurance, etc., which is a bit more tedious way to do it. 

Expenses big and small can be considered deductions, and every cost counts. From office supplies like pens, papers and notebooks, to large equipment rentals and business events, ensure you are keeping track of all costs. 

When looking into tax deductions, and what is considered one, the IRS' detailed guide can help business owners make that determination. 

employee at desk

There are several different expenses to running a business that could lower your taxable income. (Stefan Wermuth/Bloomberg via Getty Images / Getty Images)

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3. How do I report tax deductions?

Tax deductions are reported when businesses file their taxes. 

An individual that is a sole proprietor should fill out Schedule C to report the income or loss of their business, according to the IRS. 

This form is usually attached to an individual's 1040 tax return, per TurboTax. 

When you own a small business, it's vital to keep track of your expenses in an organized format to ensure you have all the accurate information when it does come time to file. 

Laptop people tax forms

Keeping up with the costs of running your business all year, including expenses big and small, will be extremely beneficial when it comes time to file your taxes. (iStock / iStock)

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Having a business bank account separate from your personal finances, keeping track of receipts and recording all expenses are just a few ways to help streamline the process. 

Additionally, working with accounting software can help keep everything organized, digital and up to date, so you have easy access to your business's financial information.