Kiddie Tax in 2026: How Your Child's Investment Income Is Taxed — the $1,350 / $2,700 Thresholds, the Parent's-Rate Tier, and Form 8615 vs. Form 8814

Kiddie Tax 2026 Explained: How Your Child's Investment Income Is Taxed

The "kiddie tax" is the nickname for the rule in Internal Revenue Code §1(g) that taxes a portion of a child's unearned (investment) income at the parent's marginal tax rate instead of the child's own, much lower rate. Congress created it to shut down a classic strategy: shifting dividend-paying stocks, bonds, and other income-producing assets into a low-bracket child's name to have the income taxed at the child's rate. Crucially, the kiddie tax applies only to unearned income — a child's wages from a job are never subject to it. For 2026 the structure is a clean three-tier system that every parent with a custodial brokerage account, an UTMA/UGMA, or an inherited account should understand.[2, 1]

Here is the 2026 framework in one sentence: the first $1,350 of a child's unearned income is effectively tax-free (sheltered by the dependent's standard deduction), the next $1,350 (income between $1,350 and $2,700) is taxed at the child's own 10% rate, and everything above $2,700 is taxed at the parent's marginal rate. These figures come directly from the IRS's 2026 inflation adjustments in Revenue Procedure 2025-32 and are unchanged from 2025. Unearned income includes interest, dividends, capital gains, rents, royalties, taxable scholarship income, and distributions from trusts — essentially everything that is not wages.[4, 1, 11]

Why does this matter so much for families who invest on behalf of their children? Because the kiddie tax quietly caps the value of putting investments in a child's name, and because a growing custodial account can cross the $2,700 line surprisingly fast. A $60,000 custodial portfolio yielding 4.5% throws off $2,700 in a single year — exactly the point where the parent's-rate tier begins. This guide walks through every moving part for 2026: the earned-versus-unearned distinction, the precise thresholds, who is actually subject (the age and student tests), how the parent's-rate tier interacts with capital-gains rates, the Form 8615 versus Form 8814 decision, the accurate legislative history, what the One Big Beautiful Bill did and did not change, and seven concrete strategies to legally minimize the bill. Before you read on, it helps to see how fast a tax-efficient versus tax-inefficient account compounds over a childhood — model it with our compound interest calculator.[4]

Earned vs. Unearned Income: What Triggers the Kiddie Tax (and What Does Not)

The single most important concept in the entire kiddie-tax system is the line between unearned income and earned income — get this wrong and every later calculation is wrong. Unearned income is investment income: taxable interest, ordinary and qualified dividends, capital gains and capital-gain distributions, rents, royalties, taxable Social Security or pension income, the taxable portion of scholarships, and income distributed from a trust. These are the amounts reported to your child on a Form 1099-DIV or 1099-INT and tallied on Schedule B. Only unearned income flows into the kiddie-tax calculation.[1, 12, 13, 17, 18]

Earned income — wages, salary, and tips a child receives for actual work — is the opposite: it is never subject to the kiddie tax and is always taxed at the child's own rate using the child's own standard deduction. A 16-year-old who earns $7,000 at a summer job and has zero investment income owes no kiddie tax and likely no income tax at all, because the 2026 dependent standard deduction shelters earned income up to the regular standard-deduction amount. This is exactly why funding a custodial Roth IRA from a child's earned income is so powerful — earned income side-steps the kiddie tax entirely and then compounds tax-free. When a child has both kinds of income (a part-time job and a brokerage account), only the unearned portion is tested against the $2,700 threshold.[1, 10]

One term you will see throughout the forms is "net unearned income." It is simply the child's unearned income minus the amount sheltered by the standard deduction and minus any directly connected deductions — in plain terms, the slice of investment income that actually gets exposed to the parent's rate. For 2026 the sheltering amount is the $1,350 dependent standard-deduction floor set under §63(c)(5) and inflation-adjusted by Rev. Proc. 2025-32. Keeping the unearned/earned distinction crisp is the foundation for everything that follows.[3, 4]

Kiddie Tax Thresholds for 2026: The $1,350 and $2,700 Breakpoints

Here is the complete 2026 three-tier structure for a child's unearned income, taken directly from Rev. Proc. 2025-32 and IRS Topic No. 553:[4, 1]

The $1,350 figure is not arbitrary: it is the minimum standard deduction for someone who can be claimed as a dependent, set by §63(c)(5) and inflation-adjusted for 2026 in Rev. Proc. 2025-32 (the dependent's standard deduction is the greater of $1,350 or the child's earned income plus $450). The second $1,350 band is the separate kiddie-tax exemption amount under §1(g). Add them and you get the $2,700 line at which the parent's rate kicks in. Important: these are 2026 figures and they are unchanged from 2025; do not use the 2024 amounts ($1,300 / $2,600). Note also that the IRS's general About Form 8615 summary page still displays an outdated "$2,100" trigger — the current, correct figure is $2,700, confirmed in Rev. Proc. 2025-32 and the IRS's separate 2026 inflation release IR-2025-103.[3, 4, 6, 9]

A quick worked example. Suppose your 12-year-old's UTMA account generates $4,000 of dividends and interest in 2026 and the child has no earned income. The first $1,350 is tax-free; the next $1,350 is taxed at the child's 10% rate ($135); and the remaining $1,300 ($4,000 − $2,700) is taxed at the parent's marginal rate. If the parents are in the 24% bracket, that last slice costs $312, for a total tax of roughly $447 on $4,000 of income. The same $4,000 earned at a summer job would, by contrast, generate $0 of federal income tax. That gap is the kiddie tax in action — and the rest of this guide shows you exactly how to compute it, report it, and shrink it.[5, 14]

Who Is Subject to the Kiddie Tax? The 2026 Age and Student Tests

The kiddie tax does not apply to every minor — it is defined by a precise age-and-support test. A child is subject to it for 2026 if any of the following is true: (1) the child was under age 18 at the end of 2026; (2) the child was age 18 at the end of 2026 and did not have earned income that was more than half of their own support; or (3) the child was a full-time student aged 19 to 23 at the end of 2026 and did not have earned income that was more than half of their own support. The Form 8615 instructions and Topic No. 553 lay out these brackets verbatim.[5, 1]

Beyond the age test, two more conditions must be met before the kiddie tax actually applies. First, at least one of the child's parents must be alive at the end of the year — the rule is built around attributing income to a living parent's rate. Second, the child must not be filing a joint return with a spouse. And for the tax to be calculated on Form 8615 at all, the child's unearned income must exceed the $2,700 threshold. If unearned income is $2,700 or less, the kiddie tax produces nothing and Form 8615 is not required, although the child may still need to file a return for other reasons explained in Publication 501.[2, 5, 10]

The "earned income more than half of support" clause is the most useful escape hatch in the whole regime. A 19-to-23-year-old student who works enough to cover more than half of their own living costs steps out of the kiddie tax entirely, even with a large brokerage account — their investment income reverts to being taxed at their own rate. This is why the kiddie tax is sometimes called a tax on financial dependence rather than age alone: a self-supporting young adult is treated as the independent taxpayer they functionally are. Note that "support" includes lodging, food, education, medical care, and similar costs, and that scholarships received by a full-time student are generally excluded from the support calculation.[1, 2]

The Parent's-Rate Tier: How 2026 Tax Brackets Apply to Your Child's Income

Once a child's unearned income crosses $2,700, the excess is taxed at the parent's marginal rate — the rate that would apply if that income were stacked on top of the parent's own taxable income. This is why two identical children with identical $5,000 portfolios can owe very different kiddie taxes: the one whose parents are in the 37% bracket pays far more on the Tier-3 slice than the one whose parents are in the 12% bracket. For reference, here are the 2026 single-filer brackets that often apply (joint brackets are roughly double); you can explore them in depth in our 2026 federal tax brackets guide:[2, 5]

A frequently misunderstood point: if the child's Tier-3 income consists of long-term capital gains or qualified dividends, it is not automatically taxed as ordinary income. Instead, Form 8615 carries that income through the parent's preferential capital-gains brackets (0%, 15%, or 20% per Topic No. 409) — so a child's long-term gains are taxed at the parent's capital-gains rate, not the parent's ordinary rate. Our capital gains tax guide covers those preferential brackets in detail. Finally, if a family has several children subject to the kiddie tax, the calculation aggregates the children's net unearned income on a single allocable-parental-tax computation and then splits the resulting tax back among them proportionally — so siblings' investment income effectively stacks together.[14, 5]

Form 8615 Explained: Filing the Kiddie Tax on Your Child's Return

Form 8615, Tax for Certain Children Who Have Unearned Income, is the default way the kiddie tax is reported. It is attached to the child's own tax return (not the parent's) and must be filed whenever the child's unearned income exceeds $2,700, the child meets the age test, has at least one living parent, and is not filing a joint return. The child remains the taxpayer; the form simply imports the parent's rate to tax the Tier-3 portion.[5, 6]

Mechanically, Form 8615 works in three moves. It first computes the child's net unearned income (unearned income minus the $2,700 sheltered amount). It then calculates a tentative tax at the parent's rate by figuring what additional tax the parent would owe if the child's net unearned income — plus that of any siblings subject to the rule — were added to the parent's return; this is the "allocable parental tax." Finally, it allocates that tax back to the child and compares it with the tax the child would owe at their own rate, taking the higher result. Because the computation needs the parent's taxable income and filing status, you cannot complete a child's Form 8615 until the parent's return is essentially finalized.[5, 2]

A documentation note that trips up many filers: the old IRS Publication 929, which used to house the kiddie-tax worksheets, has been discontinued. The authoritative computation now lives entirely in the Instructions for Form 8615. If you are following a guide or a tax course that still points to Pub. 929, you are using outdated material — use the current Form 8615 instructions instead.[5]

Form 8814: When Parents Can Report a Child's Income on Their Own Return

Instead of filing a separate return for the child, a parent may elect to pull the child's income onto the parent's own Form 1040 using Form 8814, Parents' Election To Report Child's Interest and Dividends. The election is narrow and only available when every condition is met: the child's income must consist only of interest, dividends, and capital-gain distributions (no sold securities, no wages); the total must be more than $1,350 but less than $13,500 for 2026; and there must have been no estimated-tax payments or backup withholding under the child's Social Security number. If the child sold even a single stock at a gain, Form 8814 is off the table and Form 8615 must be used.[7, 8]

If the election is available and you make it, the mechanics are straightforward. The first $1,350 of the child's income is not taxed; the parent pays a flat add-on tax of up to $135 on the next $1,350 (that is 10% of the income between $1,350 and $2,700); and any income above $2,700 is simply added to the parent's adjusted gross income and taxed at the parent's rate. The $1,350, $2,700, and $13,500 figures all come from the 2026 inflation adjustments in Rev. Proc. 2025-32 and the Form 8814 instructions.[7, 4]

The obvious appeal of Form 8814 is administrative simplicity: one less tax return to prepare and file, which is genuinely convenient for a young child whose only income is a few hundred dollars of dividends above the threshold. But "simpler" is not the same as "cheaper," and as the next section shows, the election quietly carries costs that can dwarf the convenience for higher-income families.[2]

Form 8615 vs. Form 8814: Which Is Better for Your Family?

Here is the head-to-head comparison that should drive the decision:

The decisive issue for many families is the hidden cost of the Form 8814 election: it raises the parent's adjusted gross income and modified AGI. Because so many tax benefits and surcharges key off those figures, adding a child's income to the parent's return can trigger or enlarge unrelated costs — pushing the parent over the 3.8% Net Investment Income Tax threshold, raising Medicare IRMAA premium surcharges, or shrinking education credits and other phase-out-sensitive benefits. The election also forfeits the child's own 0% long-term capital-gains bracket, because the income is now taxed in the parent's higher world. As a rule of thumb: Form 8814 is fine for a young child with a small amount of pure interest and dividends; Form 8615 (a separate child return) is usually cheaper once the child has capital gains, a larger balance, or parents near an AGI cliff. The only reliable way to know is to compute it both ways.[7, 14]

A Brief History of the Kiddie Tax: 1986, the TCJA, and the SECURE Act Reversal

The kiddie tax was born in the Tax Reform Act of 1986. Before it, families could shift income-producing assets to children and have the income taxed in the child's low bracket — a widely used strategy that Congress decided was an abuse. The original rule applied only to children under 14; over the years the age was expanded to its current under-18 (and student-under-24) reach, and the income covered was broadened. The core idea, though, has never changed: a child's investment income above a small floor should not enjoy a lower rate than the family that funded it.[2]

The most important recent twist came from the Tax Cuts and Jobs Act (TCJA) of 2017. For 2018 and 2019, the TCJA decoupled the kiddie tax from the parent's rate and instead taxed a child's unearned income at the steeply compressed trust and estate tax brackets. Because trust brackets reach the top 37% rate at only a few thousand dollars of income, this change unexpectedly hammered modest beneficiaries — most painfully, the children of deceased military service members and first responders receiving survivor benefits, whose payments were suddenly taxed at trust rates.[2, 5]

The backlash was swift, and the SECURE Act of December 2019 reversed course: it restored the pre-TCJA approach, taxing a child's unearned income at the parent's marginal rate once again, and it did so retroactively — families could elect to apply the parent's-rate method for 2018 and 2019 as well. That is the law in force today. So when you read older articles describing the kiddie tax at "trust rates," recognize that this was a brief 2018–2019 detour; for 2025 and 2026 the tax is firmly back at the parent's marginal rate, exactly as this guide describes.[2, 5]

Does OBBBA Change the Kiddie Tax in 2026? What Is New (and What Is Not)

With so much tax law changing under the One Big Beautiful Bill Act (OBBBA, Public Law 119-21, signed July 4, 2025), it is worth stating clearly: OBBBA did not change the kiddie tax. The rate structure, the three tiers, the $1,350 and $2,700 thresholds, the age tests, and Forms 8615 and 8814 are all exactly as they were. The IRS's official One Big Beautiful Bill provisions page enumerates the individual changes it did make — the standard deduction, no tax on tips, no tax on overtime, the senior deduction, the Child Tax Credit, the adoption credit, new Trump Accounts, and HSA expansions — and §1(g) is conspicuously absent from that list.[15]

What OBBBA did do still matters here, indirectly. By making the TCJA's individual tax brackets permanent, OBBBA locked in the very rate schedule that the kiddie tax uses to tax a child's Tier-3 income at the parent's rate. In other words, the surrounding environment — the parent's marginal brackets — is now stable and no longer scheduled to revert at the end of 2025, which removes a source of planning uncertainty. The correct way to frame it: OBBBA did not touch the kiddie tax itself, but it did make the parent's-rate brackets that feed it permanent. You can see those permanent 2026 brackets in our 2026 federal income tax brackets guide.[15, 4]

And the 2026 dollar figures themselves? They moved only through routine inflation indexing under Rev. Proc. 2025-32 — and this year, that indexing left the kiddie-tax amounts unchanged from 2025 at $1,350 and $2,700. So if you see a 2026 article claiming the kiddie tax "changed under the Big Beautiful Bill," treat it with skepticism: the only thing that changed around the kiddie tax is the permanence of the brackets it borrows.[4]

How to Reduce or Avoid the Kiddie Tax: 7 Strategies for 2026

The kiddie tax is not something you simply pay or avoid by luck — it is highly manageable with a few deliberate choices about what a child owns and when income is realized. Strategy 1: favor growth-oriented index ETFs and stocks that defer gains. A broad index fund that pays little dividend and is rarely sold throws off almost no annual unearned income, letting the value compound untaxed until the child eventually sells — ideally in a low-income year of their own. Strategy 2: use tax-exempt municipal bond interest, which is generally not taxable and therefore does not feed the $2,700 calculation. Strategy 3: route education savings through a 529 plan, where, per Topic No. 313, earnings grow tax-free and are never counted as the child's unearned income.[11, 16]

Strategy 4: fund a custodial Roth IRA with the child's earned income. Because earned income is never subject to the kiddie tax, a working teen can contribute up to their earned income (subject to the annual IRA limit) and let the money grow entirely tax-free for retirement — arguably the single most powerful move available to a family with a working child. Strategy 5: harvest gains in low-income years up to the child's own 0% long-term capital-gains bracket. If a child's overall income is low, long-term gains can be realized and taxed at 0% under Topic No. 409 — but plan carefully, because the kiddie tax can pull the parent's rate onto gains above $2,700. Our capital gains tax guide explains the rate brackets in depth.[14]

Strategy 6: use Series I savings bonds for deferral. Per TreasuryDirect, I bonds let you defer federal interest tax until redemption and can be entirely tax-free when used for qualified education — a clean way to keep unearned income off the annual return. Strategy 7: time and size gifts thoughtfully, recognizing that the kiddie tax can persist until a student is 24. One important non-tax trade-off threads through all of these: financial aid. Assets held directly in a child's name through an UTMA/UGMA custodial account are assessed far more heavily on the FAFSA than a parent-owned 529, so the lowest-tax structure is not always the highest-aid structure. Weigh both before deciding where a child's money should live.[20, 21]

Where the Income Lives: UTMA/UGMA, 529, Custodial Roth IRA, and Trump Accounts

Whether the kiddie tax bites at all depends largely on which account a child's money sits in. A UTMA/UGMA custodial account is the classic trigger: per FINRA, an adult custodian manages the account until the child reaches the age of majority, but the assets legally belong to the child — so every dollar of interest, dividends, and realized gains is the child's unearned income and flows straight into the kiddie-tax calculation. This is exactly the account our UTMA/UGMA custodial accounts guide covers in full.[21]

Other accounts behave very differently. A 529 plan grows tax-free and its earnings are never the child's unearned income, so it sidesteps the kiddie tax entirely. A custodial Roth IRA is funded by the child's earned income and also grows tax-free, untouched by §1(g). And the newly created Trump Accounts — the tax-advantaged newborn savings accounts established under OBBBA, seeded with a $1,000 federal contribution for eligible children — add another tax-deferred option to the toolkit. When you do fund a taxable custodial account, remember the 2026 annual gift-tax exclusion of $19,000 per donee ($38,000 for a married couple) caps how much each giver can contribute per year without gift-tax paperwork. Our newborn lifetime financial plan maps how these accounts fit together over a childhood.[16, 19]

The table below summarizes how each account interacts with the kiddie tax and with financial aid:

Kiddie Tax 2026 Worked Examples and Common Mistakes to Avoid

Two numeric examples make the 2026 mechanics concrete. Example A — under the threshold. A 10-year-old has $2,000 of interest and no earned income. The first $1,350 is sheltered by the standard deduction; the next $650 (from $1,350 to $2,000) is taxed at the child's 10% rate for $65. Because total unearned income is below $2,700, there is no Tier 3 and no Form 8615 — total tax is just $65.[5, 4]

Example B — over the threshold, parents in the 24% bracket. A 14-year-old has $5,000 of ordinary dividends and interest. The first $1,350 is free; the next $1,350 is taxed at the child's 10% ($135); and the remaining $2,300 ($5,000 − $2,700) is taxed at the parents' 24% rate ($552). Total kiddie tax: $687, reported on Form 8615 with the child's return. If the parents instead made the Form 8814 election (allowed here because the income is only dividends and interest), the direct tax is similar — but the $2,300 of Tier-3 income is added to the parents' AGI, which could nudge them over a Medicare IRMAA bracket or the 3.8% NIIT line. The lesson: when income is purely interest and dividends, run both forms and compare not just the direct tax but the AGI side effects. One more nuance: if Example B's income had instead been long-term capital gains from selling stock, Form 8814 would be off the table entirely, and the Tier-3 gains would be taxed at the parents' preferential capital-gains rate (often 15%) rather than 24%.[5, 7, 14]

Finally, the mistakes that cost families money or trigger IRS notices. (1) Confusing earned and unearned income — a child's wages never count. (2) Using stale numbers — the 2026 figures are $1,350 and $2,700, not the 2024 amounts ($1,300 / $2,600); ignore the outdated "$2,100" still printed on the IRS About Form 8615 page. (3) Assuming OBBBA changed the kiddie tax — it did not. (4) Forgetting the living-parent requirement — the rule needs at least one living parent. (5) Making the Form 8814 election blindly and being surprised when it raises the parents' AGI into IRMAA or NIIT territory. (6) Following the discontinued Publication 929 instead of the current Form 8615 instructions. Avoid these six and you will compute the kiddie tax correctly. And because every tax dollar deferred or saved compounds over a childhood, it is worth seeing the long-run difference a tax-efficient structure makes.[4, 6]

Kiddie Tax 2026: Frequently Asked Questions

The questions below cover the most common points families ask about the kiddie tax for 2026. Each answer reflects the current IRS guidance and the 2026 figures from Rev. Proc. 2025-32; use this as a quick reference when reviewing a child's return or a Form 8615.