Here's the counterintuitive truth about nanny taxes: paying legally can save you money. The same W-2 that makes you compliant is the key that unlocks several tax breaks designed to offset the cost of childcare. Used together, they can return a few thousand dollars a year. Here's the whole menu.

Every break below requires paying your nanny on the books, with a W-2 and their SSN or EIN. Under-the-table pay forfeits all of them.

1. Dependent Care FSA — the biggest lever

If your job offers one, a Dependent Care FSA lets you pay childcare with pre-tax dollars — up to $7,500 for 2026 (up from $5,000). Because those dollars skip income and FICA tax, the savings often top 30% of the amount you route through it. It's the first break to check because it's usually the largest.

2. Child & Dependent Care Tax Credit

The Child & Dependent Care Credit returns a percentage of up to $3,000 (one child) or $6,000 (two or more) in care expenses. For 2026 the top percentage rose to 50% for the lowest incomes, phasing down to 20% for higher earners. Claimed on Form 2441 with your 1040.

3. Stacking the FSA and the credit

You can use both, with one rule: dollars run through the FSA reduce the expenses you can claim for the credit — no double-dipping on the same dollar. The winning move for many families with two or more kids:

  • Max the FSA first (up to $7,500) — the pre-tax savings are usually richer.
  • Apply remaining expenses to the credit up to the $6,000 two-child cap.
  • That can mean sheltering more than $11,000 of nanny wages across the two breaks.
Run the numbers both ways if your income is on the lower side — the credit's higher 2026 percentages can occasionally beat the FSA for some families.

4. Don't forget non-taxable reimbursements

Not a 'credit,' but real savings: mileage reimbursement at the IRS rate and a properly structured health reimbursement (QSEHRA) let you give your nanny value without it counting as taxable wages — lowering payroll taxes for both of you.

5. The nanny share multiplier

In a nanny share, each family is a separate employer and claims the full FSA and credit caps on its own share of the wages — the IRS doesn't split the limits between the families. Shared cost, un-shared tax breaks.

Amounts, percentages, and eligibility rules change year to year and depend on your situation. This is an overview, not tax advice — confirm with current IRS guidance or a tax professional.

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The bottom line

Pay on the books, then collect: max a Dependent Care FSA, claim the Child & Dependent Care Credit, use tax-free reimbursements, and — in a share — double up per family. The paperwork that makes you compliant is the same paperwork that pays you back.