Quick Answer
Step 3 on the W-4 lets you claim dependents to reduce tax withholding. Each qualifying child under 17 is worth $2,000 in credits, while other dependents are worth $500 each. If you have two young children, you'd enter $4,000 in Step 3.
Best Answer
Sarah Chen, Payroll Tax Analyst
Best for employees with children or other dependents who want to optimize their paycheck withholding
How Step 3 reduces your tax withholding
Step 3 of Form W-4 allows you to claim dependents to reduce the federal income tax withheld from each paycheck. When you enter an amount in Step 3, your employer's payroll system withholds less tax because it anticipates you'll receive these credits when filing your return.
The calculation is straightforward: your employer divides whatever amount you enter in Step 3 by the number of pay periods in a year. If you're paid biweekly (26 times per year) and enter $4,000 in Step 3, your federal withholding decreases by approximately $154 per paycheck ($4,000 ÷ 26 = $153.85).
Example: Family with two young children
Let's say you're married, earn $75,000 annually, and have two children ages 5 and 8. Here's how Step 3 affects your paycheck:
Without Step 3 (no dependent credits claimed):
With Step 3 ($4,000 for two children):
This means you get an extra $154 in each paycheck instead of waiting for a $4,000 refund at tax time.
Credit amounts for different dependents
Who qualifies as a dependent for Step 3?
To claim someone in Step 3, they must be your dependent for tax purposes:
Common Step 3 scenarios
Scenario 1: Single parent with one child (age 10)
Scenario 2: Married couple with three children (ages 6, 14, and 18)
Scenario 3: Supporting elderly parent
What you should do
Use the IRS Tax Withholding Estimator to verify your Step 3 amount, especially if you have a complex situation like divorce, multiple jobs, or significant other income. The estimator considers your complete tax picture and recommends the optimal withholding.
If you're unsure whether someone qualifies as your dependent, review IRS Publication 501 or consult a tax professional before claiming them in Step 3.
Key takeaway: Step 3 lets you claim $2,000 per child under 17 and $500 for other dependents, reducing your federal tax withholding by roughly 1/26th of that amount per biweekly paycheck.
Key Takeaway: Step 3 reduces federal withholding by claiming $2,000 per child under 17 and $500 for other dependents, giving you more money in each paycheck instead of a larger refund.
Credit amounts for different types of dependents in Step 3
| Dependent Type | Credit Amount | Step 3 Entry |
|---|---|---|
| Child under 17 (qualifies for Child Tax Credit) | $2,000 | $2,000 per child |
| Other dependent under 17 (no SSN) | $500 | $500 per dependent |
| Dependent 17 or older | $500 | $500 per dependent |
| Adult dependent (parent, disabled adult child) | $500 | $500 per dependent |
More Perspectives
Sarah Chen, Payroll Tax Analyst
Best for new workers who are single with no dependents but want to understand Step 3 for the future
Step 3 when you're single with no kids
As a single person with no dependents, you'll leave Step 3 blank on your W-4. This section only applies if you have qualifying dependents like children, elderly parents you support, or other relatives who meet IRS dependency tests.
Understanding Step 3 for your future
Even though Step 3 doesn't apply to you now, it's worth understanding how it works. When you eventually have children or support other family members, Step 3 will become one of the most valuable parts of your W-4.
Future scenario: Let's say in a few years you're married, earn $60,000, and have your first child. Without updating your W-4, you'd be overwithholding by about $2,000 annually. By entering $2,000 in Step 3, you'd get an extra $77 per biweekly paycheck instead of waiting for that money as a tax refund.
When Step 3 might apply to you
What you should do now
Leave Step 3 blank and focus on getting Steps 1, 2, and 5 correct. When your life situation changes and you have dependents, remember to update your W-4 to claim them in Step 3.
Key takeaway: Single employees with no dependents should leave Step 3 blank, but understanding this section prepares you for future life changes when you might have qualifying dependents.
Key Takeaway: Single employees with no dependents should leave Step 3 blank, but this section becomes valuable when you have children or support other qualifying family members.
Sarah Chen, Payroll Tax Analyst
Best for married couples who need to coordinate dependent claims between spouses
Coordinating Step 3 as a married couple
When you're married, only one spouse should claim dependents in Step 3 of their W-4 — typically the higher-earning spouse. This prevents double-counting the credits and ensures accurate withholding.
Who should claim dependents?
Higher-earning spouse claims: This approach usually works best because their higher income means more tax withholding to reduce. If you earn $80,000 and your spouse earns $45,000, you should claim all dependents in your Step 3.
Example coordination: You and your spouse have two children (ages 4 and 12) and file jointly.
Special situations for married couples
Both spouses work part-time with similar income: If you both earn around $30,000-40,000, it may not matter who claims dependents in Step 3. Choose the spouse with more consistent pay periods.
One spouse has irregular income: If your spouse is commissioned sales or has seasonal work, claim dependents on the W-4 of whoever has steady, predictable paychecks.
Supporting elderly parents together: If you jointly support parents who qualify as dependents, decide which spouse claims them. Don't split the $500 credit between both W-4s.
What you should do
Review both W-4s together annually. Use the IRS Tax Withholding Estimator with both incomes and all dependents to determine optimal withholding. Make sure only one spouse claims each dependent in Step 3.
Key takeaway: Married couples should coordinate Step 3 so only one spouse (usually the higher earner) claims all dependents, preventing overwithholding and ensuring accurate tax calculations.
Key Takeaway: Married couples should have only one spouse claim all dependents in Step 3 to avoid double-counting credits and ensure proper tax withholding coordination.
Sources
- IRS Publication 501 — Dependents, Standard Deduction, and Filing Information
- IRS Publication 972 — Child Tax Credit and Credit for Other Dependents
Related Questions
Reviewed by Sarah Chen, Payroll Tax Analyst on February 28, 2026
This content is for educational purposes only and is not a substitute for professional tax advice. Consult a qualified tax professional for advice specific to your situation.