Preliminary Work and Taxpayer Data · Preliminary work to prepare tax returns

Qualifications for dependency

The rule

“Dependent” is not one definition but two, and every dependency question begins by asking which one is in play. A dependent is either a qualifying child or a qualifying relative, and the two have different tests, different arithmetic and different consequences.

Three exceptions apply to both. An individual who is themselves a dependent of another taxpayer is treated as having no dependents (IRC § 152(b)(1)); an individual who has filed a joint return with their spouse for the relevant year is not a dependent (§ 152(b)(2)); and a person who is not a citizen or national of the United States is not a dependent unless they are a resident of the United States or of a country contiguous to it (§ 152(b)(3)(A)). That last test has a narrow exception for an adopted child who has the same principal place of abode as the taxpayer, is a member of the taxpayer’s household, and whose adopting taxpayer is a United States citizen or national (§ 152(b)(3)(B)).

Qualifying child — 5 — relationship, the same principal place of abode as the taxpayer for more than half the year, the age requirement, that the individual has not provided over half of their own support, and that the individual has not filed a joint return other than to claim a refund^TY2026Verified 2026-08-19IRC § 152(c)(1) — https://www.law.cornell.edu/uscode/text/26/152. The relationship test reaches a child of the taxpayer or a descendant of such a child, or a brother, sister, stepbrother or stepsister or a descendant of any of them (§ 152(c)(2)). The age test is under 19 at the close of the calendar year, or under 24 if a student, and in either case younger than the taxpayer; any age if permanently and totally disabled at any time during the year^TY2026Verified 2026-08-19IRC § 152(c)(3).

Note what is not in the qualifying child list: there is no gross income test, and the support test runs the other way — the question is whether the child provided over half of their own support, not whether the taxpayer did.

Qualifying relative — 4 — the relationship or member-of-household test, gross income below the exemption amount, support of over one-half provided by the taxpayer, and that the individual is not a qualifying child of the taxpayer or of any other taxpayer^TY2026Verified 2026-08-19IRC § 152(d)(1). The relationship list in § 152(d)(2) is enumerated and wide: a child or descendant; a sibling or step-sibling; a parent or ancestor of either; a step-parent; a niece or nephew; an aunt or uncle; a range of in-laws; or any individual who has the same principal place of abode as the taxpayer and is a member of the household for the year, other than a spouse. The gross income limit for 2026 is $5,300 — the exemption amount referred to in IRC § 152(d)(1)(B) for taxable years beginning in 2026^TY2026Verified 2026-08-19Rev. Proc. 2025-32 § 3.23 — https://www.irs.gov/pub/irs-drop/rp-25-32.pdf.

Here the support test is the ordinary one — the taxpayer must provide over one-half — and the last test is a gate rather than a relationship: an individual who is a qualifying child of the taxpayer or of any other taxpayer cannot be a qualifying relative.

Current figures

How it works in practice

Compute support as a fraction of the whole. The support test asks whether the taxpayer provided over half of total support, and total support includes what the dependent spent on their own support out of their own funds — including tax-exempt receipts. Money the dependent saved rather than spent is not support at all. So a dependent with 10,000 dollars of taxable income and 4,000 dollars of tax-exempt income who saved 1,000 dollars applied 13,000 dollars to her own support, and the taxpayer must provide more than that — 13,001 dollars — to pass. The instinct to compare the taxpayer’s contribution against the dependent’s income rather than against the dependent’s spending is the usual error.

The tiebreaker has an order, and it is not “whoever files first.” Section 152(c)(4) applies where two or more taxpayers could claim the same qualifying child: a parent over a non-parent; between parents not filing jointly, the one with whom the child resided longest, then the higher adjusted gross income; where no parent claims, another taxpayer only if their adjusted gross income exceeds the highest of any parent's^TY2026Verified 2026-08-19IRC § 152(c)(4). The subparagraph (C) rule is the one most often missed — where the parents could claim but do not, another taxpayer may claim the child only if their adjusted gross income is higher than the highest of any parent’s. A grandparent with a modest income cannot pick up a claim the parent declined.

Multiple support agreements exist for the case nobody funds alone. Where several people together support a person and no one provides over half, § 152(d)(3) lets one of them be treated as providing over half, on the conditions in the figures table. The contributor claiming must have provided over ten per cent, and every other person over ten per cent must file a written declaration. This is common with adult siblings supporting a parent, and it needs to be arranged before the returns are filed rather than after.

The dependent taxpayer test cascades. Section 152(b)(1) means a person who is themselves claimable as a dependent has no dependents of their own. A young parent living in her parents’ household who is their dependent cannot claim her own child, whatever the facts about the child.

Divorced and separated parents run on a separate track. Section 152(e) diverts the qualifying child to the noncustodial parent, but only where the custodial parent signs a written declaration and the noncustodial parent attaches it to the return. A decree awarding the claim does not do it. That rule is treated in its own topic.

How this has changed

The Working Families Tax Relief Act of 2004 created the uniform definition of a qualifying child that still governs, replacing five differently-worded tests scattered across the dependency exemption, head of household status, the child credit, the dependent care credit and the earned income credit. The structure of § 152 has been stable since.

The Tax Cuts and Jobs Act then produced the oddity that shapes the current text. Section 152(d)(1)(B) sets the qualifying relative gross income limit by reference to “the exemption amount (as defined in section 151(d))” — and § 151(d)(5) reduces that amount to zero. Read literally, no one could be a qualifying relative. The IRS resolved this by treating the § 152(d)(1)(B) exemption amount as the pre-TCJA figure indexed for inflation, and it is now published annually in the inflation revenue procedure: for 2026 the figure is in the table above, from Rev. Proc. 2025-32 § 3.23. Public Law 119-21 made the zero exemption amount permanent in 2025, so this arrangement is now the settled long-term position rather than a temporary workaround.

The practical consequence for a practitioner is that the qualifying relative gross income limit must be looked up in the current revenue procedure every year. It is not the standard deduction, it is not zero, and it does not appear in the statute.

Exam focus

Know the five qualifying child tests and the four qualifying relative tests, and know which way the support test points in each. Know the age test cold — under 19, or under 24 if a student, and younger than the taxpayer, with no age limit for the permanently and totally disabled. Know that only the qualifying relative has a gross income limit. Be ready to compute support from a fact pattern that includes tax-exempt income and savings. And know the tiebreaker order: parent over non-parent, then residence, then adjusted gross income.

Check yourself

1. Which does not meet the age requirement to be a qualifying child?

A. A 17-year-old single mother B. A 30-year-old with a permanent and total disability C. A 28-year-old full-time student D. A 9-year-old

Answer: C. A student must be under 24; there is no age limit for an individual permanently and totally disabled at any time during the year.

2. A child resided with Parent A longer than with Parent B during the year, and Parent A also has the higher adjusted gross income. The parents do not file jointly and both claim the child. Who prevails?

A. Both may claim the child B. Parent A C. Parent B D. Neither may claim the child

Answer: B — decided by residence, not income. Income is reached only where residence is equal.

3. A dependent has $10,000 of taxable income and $4,000 of tax-exempt income, saves $1,000 and spends the rest on her own support. What is the minimum the taxpayer must provide?

A. $13,001 B. $18,001 C. $26,001 D. $28,001

Answer: A. She applied $13,000 to her own support; the taxpayer must exceed half of total support, which means exceeding $13,000.

4. Which individual may not be claimed as a dependent?

A. A foreign exchange student living in the taxpayer’s home B. A foreign-born adopted child living with the taxpayer as a member of the household C. A resident of Canada D. A United States resident alien

Answer: A. The citizenship and residency gate admits residents of the United States, Canada and Mexico, with a narrow exception for an adopted child.

5. An 18-year-old mother who can be claimed as a dependent by her parents lives with them and her own child. Who may claim the child?

A. Both the grandparents and the teenage parent B. Neither C. Only the grandparents D. Only the teenage parent

Answer: C. An individual who is a dependent of another taxpayer is treated as having no dependents — though the grandparents must also clear the tiebreaker rule that applies where no parent claims.