As a sole proprietor, you can write off "ordinary and necessary" business expenses to reduce your taxable income. An ordinary expense is common and accepted in your trade, while a necessary expense is helpful and appropriate for your business. You report these expenses on IRS Schedule C (Form 1040).
Expenses that you can claim as a Sole Trader
The biggest tax mistakes people make include filing late, math errors, incorrect personal info (like Social Security numbers), forgetting deductions/credits (like EITC), misreporting income, not signing forms, and making errors with bank details for direct deposit, all leading to delays, penalties, or missed savings, with using tax software or professionals helping avoid these common pitfalls.
Many business expenses are 100% deductible, including advertising, employee wages, rent, supplies, and certain business meals like company parties or meals for the public, while personal deductions like student loan interest or charitable donations (depending on the type) can also be fully deductible for individuals. The key is that the expense must be "ordinary and necessary" for your trade or business or meet specific IRS criteria, often differentiating from the 50% rule for client meals.
The IRS uses a combination of automated and human processes to select which tax returns to audit. Not reporting all of your income is an easy-to-avoid red flag that can lead to an audit. Taking excessive business tax deductions and mixing business and personal expenses can lead to an audit.
What are the most common tax deductions people claim?
Allowable expenses include your basic office costs such as stationery and the bills you pay on your business phone. Travel costs and staff salaries are also included, as is the cost of a uniform or other appropriate clothing (for example, if you work in a skilled or manual trade).
The IRS doesn't have a specific dollar limit for hobby income; instead, it focuses on profit motive: if you intend to make a profit, it's a business, but if it's for fun, it's a hobby, and you must report all income but can't deduct losses. Key is that you report all hobby income on Form 1040 as "other income," and if net earnings from self-employment are $400 or more, you owe self-employment tax, even if it's a side gig. The main difference from business is that you can't deduct hobby expenses (under current law) and must report all profits.
Expensing an item may bring in more money in the short term, but once you have expensed it, it does not qualify for write-offs on future tax returns. Depreciating an asset may result in less money upfront, but could result in fewer taxes owed in the future.
Most self-employed people rely on the same phone and broadband for both work and personal use. You can usually claim back part of the cost as a business expense, but only the share that relates to your work.
There are five potential disadvantages that come with being a sole trader:
Businesses that show losses are more likely to be audited, especially if the losses are recurring. The IRS might suspect that you must be making more money than you're reporting. Otherwise, why would you stay in business? Most likely to be audited are taxpayers reporting small business losses.
Here are 12 IRS audit triggers to be aware of:
The IRS "10k rule" primarily refers to the requirement for businesses and financial institutions to report cash transactions over $10,000 by filing Form 8300 (for businesses) or a Currency Transaction Report (CTR) (for banks), under the Bank Secrecy Act. This rule helps combat money laundering, tax evasion, and terrorist financing, requiring reporting for single transactions or related transactions totaling over $10,000 in cash within a year, with penalties for non-compliance.
For the 2025 tax year, you'll generally receive a Form 1099-K from platforms like eBay, Etsy, and payment apps if you have over $20,000 in gross payments AND more than 200 transactions, but you must report all income (even small amounts) if it's for goods/services, as you're taxed on profit, not just when you get a 1099-K, with lower state thresholds possible.
Overlooking deductions can cause you to overpay your taxes. Congress revamped several key tax breaks in 2017. Pay attention to child care expenses, medical bills, state sales taxes and student loan interest.
Rumors of a universal $ 3000 check from the IRS have gained traction on social media, but these claims are not true. As of 2025, there is no federal program authorizing a new $ 3000 stimulus, rebate, or automatic payment to all Americans.