The scene is the same every April: you look at last year’s refund $2,800 and this year’s $1,100. You earned the same, filed in the same place, and yet the number doesn’t add up. Did they rob you? Did the preparer do something wrong? Did the law change?
It’s almost never an error. It’s almost always one of these seven causes. Let’s review them one by one, and at the end I’ll leave you the method to diagnose your case by comparing your two returns.
Cause 1: less was withheld from you during the year
The most common of all. Remember: the refund is the return of what was overpaid. If this year your employer withheld less tax from each paycheck —because you updated the W-4, changed jobs, or simply the withholding formula changed— then you paid less in advance, and your refund is smaller even though your final tax is the same.
A smaller refund with the same withholding as last year is another signal: a smaller refund with smaller withholding is pure arithmetic. Compare box 2 of this year’s W-2 with last year’s before blaming anyone.
Cause 2: a child turned 17 and the credit transformed
This one hurts in silence. The child tax credit of $2,200 applies only to children under 17. When your child turns 17, that credit ends and is replaced by the credit for other dependents, of barely $500.
The direct difference: $1,700 less in credit. Which translates almost dollar for dollar into $1,700 less refund (or $1,700 more tax to pay). It’s the most frequent cause in families that earned exactly the same.
Cause 3: your family composition changed for the EITC or other credits
Credits depend on who lives in your home and how old they are. If a child turned 19 (or 24 and stopped being a full-time student), they stop qualifying for the EITC as a qualifying child. If your income rose just enough to cross a phaseout threshold —even by just a few hundred dollars— the credit shrinks or disappears.
The EITC is especially sensitive: maximum amounts of $664 with no children, $4,427 with one, $7,316 with two, and $8,231 with three or more in 2026, but the phaseout is gradual. A small income increase can move your credit by several hundred dollars.
Cause 4: you had extra income with no withholding
You did overtime, received a bonus, worked a second 1099 job, or sold something. All that extra income generates tax, but it had no withholding (or little). In April, the total tax goes up, what’s withheld doesn’t go up proportionally, and the refund shrinks —or turns into a balance due.
This is the trap of extra income: it feels like free money when it arrives, but the IRS counts it the same as your salary. The December bonus you spent on gifts shows up in April as pending tax.
Cause 5: a credit ended or its amount changed
Amounts adjust for inflation each year and some temporary rules expire. If last year you claimed a credit that this year doesn’t apply because of a change in your situation or changes in the law, the refund drops even though everything else is the same. Check line by line: credits are the item that moves the refund most from one year to another.
Cause 6: the IRS offset your refund
If you owed back taxes, child support, delinquent federal student loans, or other debts with the government, the Treasury can keep part or all of your refund to apply it to that debt. You get a letter explaining the amount kept and which agency it went to.
In this case it’s not that your refund “dropped”: it never arrived whole in your hands. If your refund disappeared without explanation, check the mail: the offset letter usually arrives before or together with what’s left of the refund.
Cause 7: your payment plan absorbed your refund
If you have an installment agreement with the IRS, your future refunds are automatically applied to the pending balance. You expected $2,000 back: the $2,000 went to the debt. The plan is still in effect, but the refund doesn’t reach your account.
Take this year’s return and last year’s, and compare these lines
- Total income: did it go up or down? A small increase can cross credit thresholds.
- Total withholding (payments): was less withheld this year? There’s the most likely explanation.
- Credits claimed: is any missing that was there last year? Look for the child credit and the EITC first.
- Your dependents’ ages: did any turn 17, 19, or 24? The dependent’s age changes the credit.
- IRS or Treasury letters: did any offset or adjustment notice arrive?
Nine times out of ten, the answer appears in the comparison of those five lines. And if it doesn’t appear, that’s the moment to take both returns to a preparer and ask them to explain the difference: it’s their job, and a good explanation is worth the price.
What to do today, in order
- Compare your W-2s from both years: start with withholding, cause number one.
- Review your dependents’ ages and the credits that changed.
- If there was extra income without withholding, plan: set aside part of it next time.
- If the refund was reduced by offset, contact the creditor agency to settle the debt and free future refunds.
This content is informational and is not tax advice. For your particular case, consult the official sources or an authorized professional.
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