W-4 Dependents: The $2,000 and $500 Rules Explained
Updated for 2025–2026 · Educational guidance, not tax advice
Step 3 of the W-4 is where you claim dependents — and it is the single biggest lever for reducing how much tax comes out of your paycheck. Here is exactly who counts, how much they are worth, and the income rules.
The two dollar amounts
| Who they are | Amount | Why |
|---|---|---|
| Qualifying child under 17 | $2,000 | Matches the full Child Tax Credit |
| Other dependents (child 17+, elderly parent, qualifying relative) | $500 | Matches the Credit for Other Dependents |
On Step 3 of the W-4:
- Line 1: Number of qualifying children under 17 × $2,000
- Line 2: Number of other dependents × $500
- Line 3: Add lines 1 and 2 — this is the total you write in Step 3
Who counts as a "qualifying child under 17"?
All of these must be true at the end of the tax year:
- Age: Under 17 (i.e., 16 or younger)
- Relationship: Your child, stepchild, foster child, sibling, half-sibling, step-sibling, or a descendant of any of these (grandchild, niece, nephew)
- Residency: Lived with you for more than half the year
- Support: Did not provide more than half of their own support
- Citizenship: U.S. citizen, U.S. national, or U.S. resident alien
- SSN: Has a Social Security number issued before the tax return due date
- Claim: You claim them as a dependent on your tax return
Who counts as an "other dependent"?
Other dependents are worth $500 each. Common examples:
- Your child who is 17 or older (including full-time students up to age 24)
- An elderly parent you support
- A qualifying relative (sibling, uncle, aunt, in-law) whose income is below the IRS threshold and whom you support
- A non-relative who lived with you the whole year and meets the support and income tests
To qualify as "other dependent," the person generally must:
- Not be your (or anyone else's) qualifying child
- Have gross income below the IRS limit (around $5,200 for 2025 — check current year)
- Receive more than half of their total support from you
- Be a U.S. citizen, national, or resident alien (or a resident of Canada or Mexico)
- Not file a joint return with a spouse (with narrow exceptions)
The income cap: when you cannot use Step 3
Step 3 is only for people below these income levels:
- Single or Head of household: Total income under $200,000
- Married filing jointly: Total income under $400,000
Above those thresholds, the Child Tax Credit and Credit for Other Dependents begin to phase out. The W-4 form says to complete Step 3 "if your income will be $200,000 or less ($400,000 or less if married filing jointly)" — if you are above these, leave Step 3 blank.
How Step 3 actually changes your paycheck
Every dollar on Step 3 reduces your annual withholding by that dollar, divided across your paychecks.
Example: You write $4,000 on Step 3 (two kids under 17) and you are paid biweekly (26 paychecks per year).
- Annual withholding reduction: $4,000
- Per-paycheck reduction: $4,000 ÷ 26 = about $154 more in each paycheck
The total amount of tax you owe at the end of the year does not change — Step 3 just takes credit for the Child Tax Credit during the year instead of waiting for your tax refund.
Common W-4 dependent mistakes
- Both spouses claim the same kids. In married filing jointly households, only one W-4 should list the dependents — usually the higher-earner's. If both list them, you will be dramatically under-withheld.
- Claiming kids you do not actually claim on taxes. If your ex-spouse claims the children per your custody agreement, you cannot put them on your W-4.
- Forgetting the 17 birthday. A teenager worth $2,000 last year is worth $500 this year.
- Claiming someone you support but who does not qualify. A boyfriend or girlfriend may "feel like" a dependent, but they must meet the IRS support and relationship tests.
- Using Step 3 while above the income cap. If your income pushes you past the phase-out, Step 3 will under-withhold you.
Examples
Example 1: Single parent with one child, age 8
- Step 1: Head of household
- Step 3 Line 1: 1 × $2,000 = $2,000
- Step 3 Line 3 total: $2,000
Example 2: Married, three children (ages 5, 10, 18 in college)
The 18-year-old is in college and you claim them as a dependent, but they are "other dependent" (not under 17).
- Step 1: Married filing jointly
- Step 3 Line 1: 2 × $2,000 = $4,000 (two kids under 17)
- Step 3 Line 2: 1 × $500 = $500 (college-age child)
- Step 3 Line 3 total: $4,500
Example 3: Supporting an elderly parent
Your mother lives with you, has Social Security income below the IRS limit, and you pay most of her expenses.
- Step 1: Single (or whatever applies)
- Step 3 Line 2: 1 × $500 = $500
- Step 3 Line 3 total: $500