Why is my refund different this year? The usual reasons
A refund can change for ordinary reasons: an IRS correction, an offset for a debt, a credit review, new withholding or 2025 law changes. How to tell which.
Prepared by Prem Tax and Accounting Corp. Last checked against official sources on October 24, 2026.
Usually it is one of five things: the IRS corrected your return, an agency took part of the refund to pay a debt, a credit needed review, your withholding or payments changed, or the tax law changed for 2025. The IRS mails a notice when it adjusts a return, and Treasury mails its own notice for an offset.
- An IRS change comes with a notice. A CP12 notice means the IRS changed your refund. Respond by the date on it, or you may lose formal appeal rights.
- An offset comes from the Treasury's Bureau of the Fiscal Service, not the IRS. Its notice shows your original refund, the amount taken and the agency.
- For tax year 2025, most law changes reach back to January 1, 2025, so many paychecks never reflected them.
- A bigger or smaller refund is not automatically an error. It is the gap between tax paid during the year and tax owed.
Common reasons and where to look
| Reason | What you will usually see |
|---|---|
| IRS correction: a math error, a credit that does not apply, or tax owed from an earlier year | A notice from the IRS, often a CP12 |
| Offset: past-due child support, certain federal debts, state income tax or some state unemployment debts | A notice from the Bureau of the Fiscal Service |
| A credit under review | A delay, then a letter if the IRS needs more |
| Different withholding or estimated payments | No notice. Compare this year to last year |
| Tax year 2025 law changes | A higher standard deduction, new deductions for tips, overtime, car loan interest and age 65 and older, and a Child Tax Credit of $2,200 per qualifying child with valid Social Security numbers |
An example (invented)
Dan's return showed a $1,800 refund. He received $1,200, plus a letter from the Bureau of the Fiscal Service showing $600 applied to a past-due debt. Nothing was wrong with his return. The letter listed his original refund, the offset and the agency, so he knew whom to contact.
What to do
- Read the notice and compare it with your return, line by line.
- Reply by the date on an IRS notice.
- For an offset, contact the agency named on the Treasury notice. Call the IRS about it only if the original refund on that notice differs from your return.
- If the debt was your spouse's on a joint return, ask us about injured spouse relief.
- Run the IRS Tax Withholding Estimator and file a new Form W-4 to bring next year closer to what you expect.
Common questions
Who takes a refund for a debt?
The Treasury's Bureau of the Fiscal Service applies offsets for past-due child support, some federal non-tax debts, state income tax and some state unemployment debts, then mails its own notice. The IRS does not see the details.
Is a larger refund good news?
Not necessarily. A refund is money you overpaid during the year. The IRS reported an average refund of $3,276 through May 8, 2026, compared with $2,939 the year before. Most 2025 law changes reached back to January 1, 2025, and many withholding amounts did not reflect them.
Should I call as soon as the amount looks off?
Wait for the letter first. The IRS mails a notice when it changes a return, and Treasury mails one for an offset. The notice names the reason and the date to reply by.
How do I make next year's refund easier to predict?
Use the IRS Tax Withholding Estimator, then give your employer a new Form W-4. If you are self-employed, review your estimated tax payments for 2026.
Official sources
- IRS: Reduced refund
- IRS: Understanding your CP12 notice
- IRS: Taxpayers could see a change in their 2025 tax bill or refund
- IRS: Filing season statistics for the week ending May 8, 2026
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