Claiming more allowances or dependents reduces what your employer withholds from your paycheck
Your W4 tells your employer how much federal income tax to hold from each paycheck. The more allowances or dependents you claim, the less money gets withheld — which means more money lands in your account on payday. The trade-off is that you may owe money when you file your tax return, or you may get a smaller refund than you would have otherwise.
The IRS W4 form changed in 2020 and no longer uses "allowances." Instead, you now claim dependents, adjust for multiple jobs, and account for other income. If you filled out an older W4 years ago, your withholding may not match your actual tax situation anymore.
Key Takeaways
- Claiming dependents on your W4 reduces federal withholding, but you must actually have dependents who may have access to under IRS rules — claiming false dependents carries penalties.
- If you have a spouse who works or a second job, adjusting the "multiple jobs" section can lower withholding without claiming dependents you don't have.
- Taking home more money now means you may owe taxes or get less back at tax time, so only adjust your W4 if you expect to owe little or nothing.
- You can change your W4 any time through your employer's payroll system — you do not have to wait until next year.
- The IRS W4 calculator on IRS.gov walks through your specific situation and recommends a withholding amount based on your income, dependents, and deductions.
Understanding the current W4 form and what each section does
The 2020 W4 form has five main sections. Section 1 is basic information — your name, address, and Social Security number. Section 2 asks about your filing status (single, married, head of household). Section 3 is where you claim dependents — children under 17, and other dependents like adult children or parents you support. Each dependent you claim reduces your withholding.
Section 4 handles multiple jobs or a working spouse. If you and your spouse both work, or if you have more than one job, this section prevents you from being under-withheld. Section 5 lets you claim other income, deductions, or request extra withholding. Most people leave Section 5 blank unless they have self-employment income or want to withhold more, not less.
To take home more money, you will focus on Section 3 (dependents) and Section 4 (multiple jobs). Claiming dependents you actually have is legal. Claiming dependents you do not have is tax fraud and can result in penalties, interest, and criminal charges.
How claiming dependents lowers your withholding
Each dependent you claim on your W4 reduces your federal withholding by a set amount per paycheck. The IRS assumes that if you have dependents, you have tax credits available — the Child Tax Credit for children under 17, or the Credit for Other Dependents for other may have access to relatives. Your employer uses this information to calculate how much tax to hold.
A dependent must meet specific IRS rules: they must be a U.S. citizen, national, or resident alien; they must have a valid Social Security number; they must live with you for more than half the year; and you must provide more than half their financial support. Children under 17 may have access to for the larger Child Tax Credit ($2,000 per child as of 2024, though this amount can change). Adult dependents, elderly parents, or disabled relatives may have access to for the smaller Credit for Other Dependents ($500 as of 2024).
If you claim a dependent on your W4 but cannot claim them on your tax return, you will owe money when you file. The IRS will also assess penalties if the discrepancy is large or repeated.
Adjusting for multiple jobs or a working spouse
If you have two jobs or your spouse works, your combined income may push you into a higher tax bracket. A single W4 at each job does not account for the other income, so you end up under-withheld. Section 4 of the W4 lets you correct this without claiming dependents you do not have.
If you have a second job and want to take home more from your primary job, you can use the "Multiple Jobs Worksheet" on the back of the W4 or use the IRS calculator. The worksheet asks for your income from both jobs and tells you how much to adjust your withholding. You can also simply request extra withholding on one job to cover the tax liability from the other — this is the safest approach if math is not your strength.
If you are married and both spouses work, the same principle applies. The W4 has a checkbox in Section 4 for "Married filing jointly with more than one job or spouse works." Checking this box increases withholding slightly to account for the second income.
Using the IRS W4 calculator to find your correct withholding
The IRS W4 calculator at IRS.gov is the most accurate way to figure out what to claim. It asks about your filing status, income from all jobs, dependents, deductions, and other tax situations. It then tells you exactly how many dependents to claim on your W4 to match your actual tax liability.
The calculator is free and does not require you to create an account. You will need recent pay stubs showing your year-to-date income, and you should have your most recent tax return handy to reference deductions. The calculator takes about 10 minutes and produces a recommendation you can take directly to your employer's payroll department.
If your life changes — you get married, have a child, buy a house, or lose a job — you can run the calculator again and adjust your W4. There is no penalty for changing your W4 multiple times in a year.
What happens if you claim too many dependents
If you claim more dependents than you actually have, your employer withholds less tax than you owe. When you file your return, you will owe money to the IRS. If the amount is large, you may also face penalties and interest charges. The IRS can also require you to file a new W4 if they suspect you are claiming false dependents.
The IRS matches W4 information to tax returns filed each year. If your W4 shows five dependents but your tax return claims two, the mismatch gets flagged. Repeated mismatches can trigger an audit or a requirement to file a new W4 with the IRS directly, not just your employer.
If you genuinely had a change in your dependent status — a child turned 18, a parent moved out, or a dependent no longer qualifies — you should update your W4 to reflect the change. This is not fraud; it is keeping your withholding accurate.
How to submit a new W4 to your employer
Most employers let you update your W4 through their payroll portal or HR system. Log in, find the tax withholding or W4 section, and fill out the form online. Some employers still use paper forms — ask your HR or payroll department which method they use.
When you submit a new W4, it usually takes effect on the next paycheck or within one to two pay periods. You will see the change in your take-home pay at that time. Keep a copy of the W4 you submitted for your records.
You do not need to notify the IRS when you change your W4 — your employer handles that. The IRS only sees your W4 information indirectly through your tax return and the W2 your employer sends at year-end.
Frequently Asked Questions
Can I claim dependents on my W4 if they do not live with me full-time?
No. A dependent must live with you for more than half the year to count on your W4. If a child lives with you nine months and their other parent three months, you can claim them. If they split time equally, neither parent can claim them on the W4, though tax return rules may differ.
What if I claim zero dependents — will I get a bigger refund?
Yes. Claiming zero dependents means maximum withholding, so more money comes out of your paycheck. At tax time, you will likely get a refund because you overpaid. This is the opposite of what you want if your goal is to take home more money now.
Do I need to update my W4 every year?
No, but you should update it when your life changes — marriage, divorce, birth of a child, loss of a job, or a major change in income. The IRS recommends reviewing your W4 annually, especially if you got a large refund or owed money last year.
Can my employer refuse to process a new W4?
No. You have the right to change your W4 at any time. Your employer must process it and implement the change within one or two pay periods. If your employer refuses, contact your state's labor department.
What if I owe money at tax time after adjusting my W4?
You can pay the amount owed when you file your return, set up a payment plan with the IRS, or adjust your W4 again to increase withholding for the rest of the year. If you owe a large amount, increasing withholding now prevents an even larger bill next year.