How Do You Fill Out a W-4?
The current W-4 (redesigned in 2020) asks for your filing status, information about multiple jobs or a working spouse, dependent credits, other income (investments, side gigs), and any additional deductions beyond the standard deduction. You can also request extra withholding per paycheck if you tend to owe at tax time.
When Should You Update Your W-4?
Update your W-4 after any major life change: marriage or divorce, having a child, buying a home, starting a side job, or receiving a large raise. It may also be worth revisiting if a large refund was received (too much was withheld) or owed a large balance (too little withheld) on your last Form 1040.
What Happens If Your W-4 Is Wrong?
If too little is withheld, you will owe taxes when you file and may face an underpayment penalty. If too much is withheld, you receive a refund — but that means you gave the government an interest-free loan. The IRS Tax Withholding Estimator tool helps you fine-tune your W-4 for accuracy.
Frequently asked questions
Do you need to file a new W-4 every year?
No. Your W-4 remains in effect until you submit a new one. However, reviewing it annually — especially after tax law changes or life events — helps ensure your withholding stays accurate and you avoid surprises at filing time.
Is the W-4 the same as the W-2?
No. The W-4 is a form you give to your employer to set withholding. The W-2 is a form your employer gives to you after year-end, reporting your total wages and taxes withheld. The W-4 controls input; the W-2 reports output.