Why do I owe so much in taxes this year?

Compare five lines with last year

Open last year's return next to this year's and compare these five lines. The one that moved the most is where to look first.

1. Total income. If it went up, the extra income may not have had enough tax taken out.
2. Taxable income. If it rose more than your income did, a deduction may have gone away, or your filing status changed.
3. Total tax. This is the tax for the whole year, before anything you already paid.
4. Federal income tax withheld. If this dropped while your pay stayed about the same, your withholding changed.
5. Estimated payments and credits. A credit that ended, or a payment that was missed, shows up here.

People often ask why they owe so much in taxes this year when the paycheck looks the same. These five lines turn that feeling into an answer.

Life changes that often raise a tax bill

If one of these happened this year, it's a likely reason for the bill.

• A new job, or a second job at the same time
• Getting married, when both of you work
• A divorce, or a change from head of household to single
• A child who turned 17, aged out as a dependent, or moved out
• Starting freelance work, gig work or a side business
• Selling stock, crypto or property
• A withdrawal from a retirement account
• Starting Social Security while still working, which can make part of the benefits taxable
• Unemployment benefits with no tax withheld
• A large bonus withheld at the flat 22% rate
• Moving to another state, or working remotely for an employer in another state
• Changing your W-4 to take home more pay

The home page explains the eight most common reasons in more detail, with what to check for each one.

When one big event made this year different

A sale, a large gain, a retirement withdrawal or a big bonus can make one year much larger than the next. All the tax on it lands at once, which is why the bill can feel out of proportion to the rest of the year.

If the event won't happen again, plan next year around your usual income. For estimated payments, you can base the amount on 90% of the tax you expect for the coming year, instead of on last year's larger tax, when that is the smaller number.

Questions about a bill that changed this year

What if all five lines look about the same?

Then the change is inside one of them, often a one-time amount such as a gain or a 1099 you didn't expect. Look at the forms that feed the income lines. Bring both returns, and we'll track it down together on the call.

My pay didn't change. Why is my withholding lower?

A few common reasons: a new W-4, a change in pre-tax benefits such as a 401(k) or health plan, or the yearly update to the withholding tables employers use. Your last pay stub of the year shows the total federal tax withheld, so you can compare it with last year's.

Is it too late to change anything for last year?

Mostly, yes, but not always. Contributions to a traditional or Roth IRA for a year can be made until that year's April filing deadline, not including extensions. If something was left off the return, Form 1040-X can correct it.

What do I do now?

Pay what you can, set up a payment plan for the rest if you need one, and fix next year's withholding. If you'd like help, book the free 30-minute call and we'll go through both years with you.

Compare the two years with us

Send a short note, and we'll set up a free 30-minute call to compare your two returns and find what changed.

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