Small businesses and independent contractors often receive income from multiple sources, including W-2 employment and 1099 contractor payments. Employers, clients, and financial institutions report this income directly to the IRS using information forms such as W-2s and 1099s. The IRS then compares that information with what taxpayers report on their tax returns.
Key Takeaway: The IRS uses automated information matching systems to compare income reported on W-2 and 1099 forms with the income listed on tax returns. If the numbers do not match, the system may flag the return and generate a notice asking the taxpayer to review or correct the information.
How the IRS Income Matching System Works
The IRS uses automated systems to process and compare millions of information returns each year. This process helps identify income that may have been reported incorrectly or accidentally omitted from a tax return.
The matching system typically follows several steps.
Businesses Submit Income Forms
Employers and businesses report payments made to workers and contractors using information forms such as:
- Form W-2, which reports wages paid to employees
- Form 1099-NEC, used to report contractor payments
- Form 1099-MISC, used for certain miscellaneous payments
- Form 1099-INT or 1099-DIV, which report interest or investment income
Each form includes identifying information such as the recipient’s name and Social Security Number or Taxpayer Identification Number.
One of the most common notices related to income discrepancies is the CP2000 notice, which proposes adjustments to a tax return based on income reported by third parties. According to the IRS, this notice is generated when the income reported on a tax return does not match information the IRS received from employers or payers. You can learn more about how this process works directly from the IRS here:
https://www.irs.gov/individuals/understanding-your-cp2000-notice
The IRS Collects and Stores the Information
When these forms are submitted, the IRS stores the reported income data in its database. The Social Security Administration also processes W-2 forms before sharing that information with the IRS.
This information becomes the reference the IRS uses when reviewing tax returns.
The IRS Compares the Information to Tax Returns
When a taxpayer files a return, the IRS automated system compares the income reported on the return with the information submitted by employers and businesses.
For example, if a contractor receives a 1099-NEC showing $15,000 in payments, the IRS expects to see that income reflected somewhere on the taxpayer’s return.
If the system does not find a matching amount, the return may be flagged for review.
What Happens When Income Does Not Match
When the IRS identifies a discrepancy between information forms and a tax return, it may generate a notice asking the taxpayer to review the situation.
One of the most common notices related to income discrepancies is the CP2000 notice. This notice proposes adjustments to a tax return based on income reported by third parties.
Taxpayers typically have about 30 days to respond to the notice.
Possible responses include:
- Agreeing with the IRS adjustment and paying any additional tax
- Providing documentation showing the income was reported correctly
- Contacting the payer if the information form was issued incorrectly
Maintaining accurate records can help resolve these notices quickly. Businesses that keep organized documentation for contractor payments and income reporting are better prepared if discrepancies appear. Learn more about what records small businesses should keep to prepare for 1099 filing here:
https://www.wagefiling.com/records-for-1099-filing/
Why Income Mismatches Occur
Income mismatches are often caused by simple reporting errors rather than intentional mistakes.
Common causes include:
- Forgetting to include a 1099 form when filing a tax return
- Receiving corrected forms after filing taxes
- Entering incorrect income totals during tax preparation
- Incorrect Social Security Numbers or Taxpayer Identification Numbers
- Duplicate or inaccurate information returns
Because the IRS relies on automated comparisons, even small errors can trigger notices.
How Businesses Can Reduce Matching Errors
Small businesses can take steps to reduce the risk of IRS income matching issues.
Verify Contractor Information
Request a Form W-9 from contractors before issuing payments and confirm that the name and TIN match official records.
Keep Accurate Payment Records
Track contractor payments throughout the year so totals reported on 1099 forms match accounting records.
Review Information Returns Carefully
Before filing W-2 or 1099 forms, review the information for accuracy to ensure amounts and identifying information are correct.
Maintain Documentation
Keep invoices, contracts, and payment records that support the income reported on tax forms.
Good documentation makes it easier to respond if the IRS requests clarification.
Frequently Asked Questions
Does the IRS match every 1099 form?
The IRS receives copies of most 1099 forms submitted by businesses and financial institutions. Automated systems compare these reports to the income reported on tax returns, which helps identify discrepancies.
How does the IRS match name and TIN information?
The IRS compares the name and Taxpayer Identification Number on W-2 and 1099 forms with records in its database. If the information does not match, the return may be flagged for review or additional verification.
How do you file taxes if you have both 1099 and W-2 income?
Taxpayers must report both sources of income on their tax return. W-2 wages are reported on the standard tax return, while 1099 contractor income may be reported as self-employment income depending on the situation.
Disclaimer
This article is provided for informational purposes only and should not be considered tax, legal, or accounting advice. WageFiling is not a CPA firm and does not represent the IRS. Always consult a qualified tax professional regarding your specific tax situation.
