Hiring Your Spouse or Child: Tax Cost and Benefit

Pay your 15-year-old $16,100 to work in your sole proprietorship and the federal tax on that money is zero — deductible to the business, untaxed to the child, and exempt from the 15.3% payroll tax that would otherwise apply. That single arrangement can move roughly $4,000 to $6,000 a year off a household tax bill, and it is one of the few places in the code where the same dollar is simultaneously a deduction for one taxpayer and tax-free income for another.

The mechanics are narrower than most marketing content admits. The exemptions that make hiring a child genuinely efficient apply only to specific entity types, vanish at specific ages, and collapse entirely if the business is a corporation. Hiring a spouse follows a different rulebook with a smaller payoff. This analysis works through both, with the 2026 figures verified against IRS and Social Security Administration releases, and calculates the Finluxy Business Entity Tax Differential for each scenario.

The numbers that drive the decision

Five figures govern almost every family-employment decision for a $150k+ household. They are below, all confirmed for tax year 2026.

Sources: IRS Rev. Proc. 2025-32 (standard deduction, QBI threshold); SSA 2026 Fact Sheet, Oct. 2025 (wage base, FICA rate); IRS Notice 2025-67, Nov. 2025 (IRA limit).

Hiring your child: where the exemption actually lives

The entity structure is the whole game. Under IRC §3121(b)(3)(A), wages paid to a child under age 18 are exempt from Social Security and Medicare taxes — but only when the employer is a sole proprietor or a partnership in which every partner is a parent of the child. Under §3306(c)(5), wages to a child under age 21 are exempt from federal unemployment tax (FUTA) under the same entity conditions. The IRS confirms both rules in its family-employees guidance and in Publication 15.

Run a corporation and those exemptions disappear. The IRS states the point plainly: payments for a child’s services are subject to Social Security, Medicare, and FUTA if the business is a corporation, even one controlled by the child’s parent, or a partnership that includes any non-parent partner. An S corp versus LLC tax comparison usually favors the S corporation for the owner’s own compensation, but for child wages the unincorporated structures win outright. A single-member LLC taxed as a sole proprietor keeps the exemption; the same LLC after an S corp election loses it.

Income tax is the second layer. A dependent’s wages are tax-free up to the standard deduction for a single filer — $16,100 in 2026 per Rev. Proc. 2025-32 — because earned income up to that amount is fully offset. Withholding still applies on paper regardless of age, but if total wages stay at or under $16,100 and the child has no other meaningful income, the federal income tax owed is zero. The wage must be reasonable for genuine work; the IRS scrutinizes inflated pay to family members, and a defensible arrangement requires tracked hours, real duties, and a rate matching what an unrelated worker would command.

What the shift is worth

Consider a sole proprietor in the 32% marginal bracket who pays a 16-year-old child $16,100 for legitimate part-time work across the year. Three things happen at once. The business deducts $16,100, cutting income tax by $5,152 at 32%. Because the net business income drops, self-employment tax (SE tax) falls — the deductible portion runs at roughly 14.13% on income below the wage base, trimming about $2,275. And the child owes nothing, because the wage sits at the standard deduction and the under-18 FICA exemption removes payroll tax entirely.

Calculation by Finluxy applying IRS Rev. Proc. 2025-32 rates and SSA 2026 FICA figures. SE tax estimated at 14.13% (half of 15.3% × 92.35% net-earnings factor) on income below the $184,500 wage base. Assumes child has no other income and the business is a sole proprietorship.

The roughly $7,400 figure is the upper end, and it depends on the parent being in a high bracket with income still below the SE wage base on the shifted dollars. A more typical part-time wage of $6,000 to $8,000 — matching what entry-level help actually earns — produces savings closer to $2,800 to $3,700 on the same logic. The point holds: the savings scale with the bracket and the reality of the work, not with how much a family wishes to pay.

There is a compounding extension most coverage mentions only in passing. Earned income qualifies the child to fund a Roth IRA up to $7,500 in 2026 (IRS Notice 2025-67), and at a low bracket the Roth is almost always the right vehicle. A parent can fund it on the child’s behalf up to the lesser of the child’s earned income or the limit. That converts a tax-shifting maneuver into a multi-decade tax-free compounding account — the rare strategy that pays in the current year and again forty years later.

Hiring your spouse: a different, smaller calculation

Spousal employment does not deliver the headline payroll-tax exemption. Wages paid to a spouse are subject to income tax withholding and to Social Security and Medicare taxes; only FUTA is exempt, per the IRS family-employee rules. Because the household already pays into Social Security on the owner’s earnings, routing income through a spouse’s W-2 frequently just relabels FICA rather than eliminating it — and can even raise total Social Security tax if it pushes combined taxable wages past efficient points relative to the 15.3% self-employment tax cost.

Where spousal employment pays off is benefits, not wage-tax arbitrage. A bona fide spouse-employee can be covered under the business’s health plan, and a properly structured arrangement can open access to retirement-plan contributions that shelter far more than the family-employee FICA quirk ever would. The deductible-wage mechanics still apply — the business deducts reasonable compensation — but the SE tax savings that make child-hiring attractive largely evaporate because the spouse’s wages carry their own FICA load.

One structural note worth flagging: if both spouses materially participate and share profits, the IRS may treat the venture as a partnership requiring Form 1065, unless they make a qualified joint venture election. That election preserves sole-proprietor-style simplicity and, relevant here, keeps the child-wage FICA exemption intact for a two-spouse-owned operation.

The Finluxy Business Entity Tax Differential

The Finluxy Business Entity Tax Differential measures the annual tax savings of the most favorable entity structure versus the least favorable, for the same family-employment arrangement and income level. For a child-hiring strategy, the spread between a sole proprietorship and an S corporation is stark, because the corporate structure forfeits both the FICA and FUTA exemptions on the child’s wages.

Calculation by Finluxy. FICA at 15.3% combined on $16,100; FUTA estimated at 0.6% on the first $7,000 of wages after standard credit. S corp forfeits the under-18 FICA and under-21 FUTA exemptions and the SE-tax reduction (S corp wages are not subject to SE tax in the first place). Differential expressed against the $16,100 wage shifted.

Read against gross business income rather than the wage alone, the differential is smaller as a percentage but still material: on $300,000 of net business income, the $4,780 swing is about 1.6% of gross — meaningful for a strategy that requires only correct entity selection and honest recordkeeping. The figure understates the full picture, because it excludes the Roth IRA compounding that only the deductible-wage arrangement unlocks.

What most coverage overlooks

The dominant framing treats child-hiring as an income-tax play — shift income from a high-bracket parent to a zero-bracket child. The income-tax shift is real, but it is the smaller half for many $150k+ sole proprietors. The larger and less-discussed lever is self-employment tax. When a sole proprietor pays a child, the business’s net income falls dollar-for-dollar, and every shifted dollar below the $184,500 wage base escapes the roughly 14.13% effective SE tax the parent would otherwise pay — on top of the income-tax savings. For a high earner whose income still sits under the wage base, the SE-tax reduction can rival the income-tax reduction. Most “hire your kids” content quotes only the standard-deduction angle and silently drops the SE-tax mechanics, understating the benefit for exactly the unincorporated owners best positioned to use it. The flip side: this is precisely why an S corp owner sees a far thinner benefit, since S corp distributions already sidestep SE tax and the child’s wages now carry full FICA.

Practical context for the $150k+ household

At this income level the decision rarely turns on the dollars alone — it turns on whether the arrangement survives scrutiny and whether it fits the existing entity. A household already running an S corp for the owner’s reasonable compensation requirements faces a genuine tension: the structure that optimizes the owner’s payroll tax is the same one that kills the child-wage exemption. Splitting activities across a sole proprietorship for the child-employment piece can preserve both, but only if the businesses are genuinely separate.

Three thresholds deserve attention before acting. First, the $16,100 ceiling is per child and assumes no other income; a child with investment income or a separate job can trigger tax and, potentially, kiddie-tax treatment. Second, the wage must be defensible — the IRS treats family compensation as a high-audit-risk area, and a 7-year-old “marketing consultant” is an invitation, not a strategy. Third, for households near the QBI deduction income thresholds, paying wages to family members reduces qualified business income, which can interact with the 20% deduction in ways that either help or hurt depending on where taxable income sits relative to the $403,500 phase-in for joint filers. A professional-service owner watching the SSTB phase-out by profession should model the family-wage deduction and the QBI interaction together, not in isolation.

For the owner running the broader optimization, this strategy slots into a stack alongside the home office deduction for business owners and Section 179 vehicle deductions, and it interacts with cash flow through quarterly estimated tax obligations — lowering net business income changes what you owe each quarter. The family-employment maneuver is not the largest lever in the business tax guide for owner-operators, but it is among the cleanest: real work, a defensible wage, and an entity that qualifies. Get those three right and the savings are durable; get the entity wrong and there is nothing to claim.