Easy-to-Miss Income Sources That Can Cause Tax Headaches Later

Published: 02/06/2026

The IRS is getting pretty good at comparing your income reports against what you claim on your tax return. The result is a notice in the mail called a correspondence audit. If you get one, it unfortunately takes a long time to straighten it out. In an effort to help you avoid this hassle, here are several easy-to-miss income sources and some ideas to help capture this IRS reported income when filing your tax return.

Easy-to-overlook income sources

  • Side gigs and freelance work. Extra projects and informal work sometimes feel more like favors than income. The IRS, though, still generally views any paid work as taxable. The upside is that these activities often come with deductible expenses, which can help offset the income when they are tracked from the start.

  • Selling items online. Online selling frequently starts as a hobby or decluttering your living space. But pay attention when your sales turn profitable or more regular. Knowing where this line is can help you decide when you need to step up your recordkeeping.

  • Small amounts from accounts and apps. Taking a moment to notice interest, bonuses, or app payments helps ensure these amounts are accounted for before tax time, when they are more likely to be flagged through automated reporting by the IRS and other tax authorities.

  • Refunds and reimbursements. Money coming back to you often feels like a non-event. Keeping brief notes about refunds and reimbursements makes it easier to confirm whether they’re taxable and ensures they’re treated correctly if questions arise later.

  • Insurance payouts and settlements. Insurance payments usually need a review. Understanding what the payment covers – replacement costs, lost income, or another purpose – helps determine how it should be reported, if at all.

  • Unemployment compensation. Keep all records. This one is often confusing because during COVID, the federal government temporarily made this income tax-free. It is no longer the case.

What you can do

To reduce the chances of missing these types of income, the following simple habits can make a meaningful difference:

  • Keep a running list of income sources. When money comes from outside a regular paycheck, make a quick note of it. A short entry on your phone or a simple spreadsheet creates a reliable reference later and reduces the chance of last-minute guesswork.

  • Save documents as you receive them. Tax forms, payout summaries, and transaction statements often arrive at different times. Placing them in a single digital or physical folder keeps everything in one place, so nothing is missed when you are ready to file.

  • Look at spam and junk email folders. Many vendors are now sending 1099s digitally via email. If they get tagged as spam email you may never see it. So keep a list and if you are missing a form, check these folders.

  • Review accounts before preparing. Before your tax return is prepared, scan your bank accounts, payment apps, and online platforms for deposits that may not feel like income. A quick review can catch items that didn’t generate an official tax form but still need to be reported.

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