Are You Missing These Common Small Business Tax Write-Offs?

Could you be missing certain deductible expenses in your business? If so, know that this is quite common — especially for small business owners with a lot on their plate. 

While most deductions are captured through a well-organized bookkeeping system, some require extra effort to pull into the books; for example, expenses that don’t run through your business bank account or that aren’t immediately obvious as deductible.

You can use this blog post as a high-level primer to help ensure you’ve captured your small business tax write-offs. When in doubt, be sure to check in with a tax professional — it never hurts to ask.

What makes these tax write-offs easy to miss

We aren’t diving into obscure or little-known tax write-offs — we’re talking about common business tax write-offs that are simply easy to miss. But why are they missed so frequently? Here are the most common culprits:

Mixing personal and business finances

When you have to manually identify business expenses in your personal bank account, it’s easy to miss them due to the sheer volume of transactions.

Even with a separate business account, mixing is still possible; for example, if you’ve purchased business office supplies and personal items on the same receipt. You’d need to note which items on the receipt are deductible business expenses and which are personal to ensure the correct deduction is captured.

There are many benefits to maintaining a separate bank account for your business, even as a sole proprietor. For more on this, you may enjoy: Here’s Why You Need a Separate Bank Account for Your Small Business

Missing documentation

For some purchases, it’s difficult to know whether a transaction was a deductible business expense without the receipt. One common example is purchases from large retailers like Amazon, where both personal and business items are often bought. 

Many business owners choose not to take the deduction if they can’t confidently support it with a detailed receipt or invoice.

If you struggle with organizing your supporting documents, you’ll find some helpful tips here: How to Organize Business Receipts (A Simple Weekly Routine)

Lack of clarity around deductible expenses

It’s difficult to remember all the rules around deductibility — that’s where tax professionals come in. But having a general idea of the rules can help you determine what to bring to your tax preparer — they can’t deduct what they don’t see. 

Some expenses aren’t immediately obvious; for example, the business portion of your home office may require manual tracking. 

Other expenses are easy to miss because they’re small (such as the monthly cost of web hosting) or not immediately obvious (like professional development within your industry).

Top 6 commonly overlooked business write-offs

Not all of these may apply to your business, as deductibility depends on the nature of your business and how it operates. 

You can use this list as a primer to consider what may apply to your business and then check with a tax professional if you’re uncertain about the deductibility of an expense.

1. Home office expenses

If you regularly use a dedicated area of your home to conduct business, you may be able to deduct home office expenses. You don’t necessarily need a separate room, but the area should be clearly defined and used exclusively and regularly for work. 

There are different methods for claiming this deduction, so it’s important to determine which applies to you. It’s helpful to track all relevant home expenses and calculate the percentage related to your home office. These expenses may include a portion of your rent or mortgage interest, utilities, and internet, for example.

2. Capital assets and equipment

We typically know to deduct smaller purchases, such as business supplies that are used up quickly. But what about larger purchases, such as assets that you will use for years to come? 

These are often classified as capital assets (think computers, furniture, or business vehicles). They also need to be recorded and tracked, but they aren’t always expensed all at once. The rules vary depending on the type of asset and when it was purchased, but some assets are deducted (depreciated) over time. 

3. Software, subscriptions, and small expenses

Because these expenses are often small or recurring, they can be easily missed throughout the year.

If you have monthly expenses for your business you know are deductible, such as accounting software, scheduling tools, web hosting, or cloud storage, it’s helpful to confirm they’re included in your books. 

Don’t forget about small cash-based purchases or expenses paid using personal bank or credit cards. Documenting these purchases as soon as they’re made helps ensure they aren’t missed, since they won’t show up in your business bank statements.

4. Education and professional development

If you hold a professional designation used in your work or engage in continuing education related to your line of business, these costs are often deductible. Examples include courses, certifications, or industry memberships.

One rule of thumb is relevance: the expense should help you do your work or improve your performance.

5. Vehicle expenses

What if you use your personal vehicle for work? In some circumstances, a portion of your vehicle costs may be deductible; specifically, the business-use portion. This generally doesn’t apply to commuting to a regular place of work; the travel must be to a client’s site or for other business-related activities. 

Similar to home office expenses, there are different deduction methods, so it’s important to identify which applies to you. Either way, in addition to logging total and business-only mileage, it’s helpful to track parking, fuel, insurance, and vehicle maintenance costs. 

6. Marketing and online presence

This is another area where costs aren’t always immediately obvious. What costs do you incur to maintain your online presence? You might have costs associated with a website, ads, email marketing platforms and services, printed materials, or banners — many of which are likely deductible marketing expenses. 

A portion of meals, entertainment, and networking events may also be deductible, but it’s important to document the costs, along with the purpose or people who attended, to evaluate deductibility.

Quick tips for capturing your deductions

In addition to building awareness, the following may help make it easier to capture your business deductions:

1. Once your business’s income tax return is drafted, compare it to last year’s. Are there any major differences? If a particular expense category is lower than last year, consider whether that’s accurate (e.g., due to operational changes or normal fluctuations), or if a deduction may have been missed. 

2. Maintain a strong organization and documentation system to support your books throughout the year. This helps limit missed deductions by ensuring your records are complete and well supported.

3. Check in with a tax professional to help ensure you’ve captured all relevant deductions — they may ask targeted questions and help clarify what is and isn’t deductible.

Supporting you with clarity throughout the year

When your books are complete and expenses are properly tracked and well documented, you can more reliably capture tax deductions, helping you avoid overpaying tax and reducing stress during tax time. 

It’s not just about tax season — partnering with a reliable bookkeeper can ease your workload and add clarity to your business’s finances year-round. If you’d like help keeping your books clear and reliable, I’d be happy to support you. Click here to schedule a free evaluation of your books and discuss how bookkeeping services can take one more thing off your plate.