Will I Owe Taxes? 2026 Withholding Checker
The 2025 tax law added new deductions for tips, overtime and seniors, and a bigger child tax credit, but most paychecks do not account for them. Side gigs and second jobs push the other way. Enter your numbers from your latest pay stub to see whether you are headed for a refund or a bill in April 2027, and what to change now while there is still time.
Your expected 2026 pay before deductions. Add every W-2 job.
Income minus business expenses. Leave 0 if none.
Total overtime pay at time-and-a-half. Only the extra half counts for the deduction.
On your latest pay stub, look for "Federal Income Tax" in the year-to-date (YTD) column.
Federal income tax only. State tax and the 0.9% extra Medicare tax on high wages are not included.
Examples (6 paychecks left)
| Situation | 2026 tax | Paid in | Result |
|---|---|---|---|
| Single, $70,000 job | $5,800 | $7,800 | Refund $2,000 |
| Same, plus $12,000 side gig (1099) | $9,458 | $7,800 | Owe $1,658 |
| Server, $42,000 incl. $9,000 tips | $1,780 | $3,510 | Refund $1,730 |
| Married, $95,000, $9,000 overtime pay, 2 kids | $1,680 | $8,190 | Refund $6,510 |
| Married retirees working, both 65+, $60,000 | $1,250 | $4,680 | Refund $3,430 |
The side gig is the classic surprise: no tax is withheld from 1099 income, and it also carries 15.3% self-employment tax. On the other side, workers with tips or overtime and people 65+ are often on track for a bigger refund than usual, because their employer withholds as if the new deductions did not exist.
What changed for 2026
- No tax on tips: up to $25,000 of qualified tips can be deducted (2025 to 2028). It phases out above $150,000 of income ($300,000 married).
- No tax on overtime: the extra "half" of time-and-a-half pay, up to $12,500 ($25,000 married), with the same phase-out.
- Senior deduction: an extra $6,000 per person 65 or older, phasing out above $75,000 ($150,000 married), on top of the regular extra standard deduction.
- Child tax credit: $2,200 per child under 17, with up to $1,700 refundable.
- Standard deduction: $16,100 single and $32,200 married filing jointly.
How to fix your withholding
If you will owe, give your employer a new Form W-4 and put the extra amount per paycheck in Step 4(c). If you have a side gig, you can either withhold more at your job or send quarterly estimated payments (Form 1040-ES); the last 2026 payment is due January 15, 2027. If you are getting a big refund, you can lower withholding instead. The IRS Tax Withholding Estimator gives the exact W-4 entries.
Will I get a penalty?
Usually not if you owe less than $1,000, or if your withholding and estimated payments cover at least 90% of this year's tax or 100% of last year's (110% if your AGI was over $150,000). Withholding counts as if it were paid evenly through the year, so raising it in the last few paychecks still helps.
How this calculator works
It subtracts pre-tax deductions from wages, adds side-gig profit and figures self-employment tax (15.3% on 92.35% of profit, with the Social Security part capped at $184,500 including your wages). Then it takes the standard deduction, the extra deduction for 65+, the senior, tips and overtime deductions (with phase-outs) and the 20% QBI deduction for side-gig profit, applies the 2026 brackets, and subtracts the child tax credit. Your projected payments are what was withheld so far plus your per-paycheck amount times the paychecks left.
FAQ
Why do I owe taxes this year?
The most common reasons are a side gig or 1099 job with no withholding, two jobs that each withhold as if they were your only job, or a spouse who also works. Each employer uses the lower brackets, so together you can be under-withheld.
Will no tax on tips and overtime give me a bigger refund?
Often yes, because most employers still withhold on all your pay. The deduction is claimed on your tax return, so the savings usually show up as a bigger refund.
How much should I add to my W-4?
Divide what you expect to owe by the number of paychecks left this year, and enter that amount in Step 4(c) of a new W-4.
When is the last estimated tax payment for 2026?
January 15, 2027, for the fourth quarter of 2026.
Does this include state tax?
No. It checks federal income tax only. Use our state paycheck calculators to check state withholding.
Rules and rates last checked: October 2026. This is an estimate for general information only, not financial, tax or legal advice. Check IRS.gov or a tax professional before you file.