Is paying a nanny under the table actually risky, or does everyone just do it and get away with it? The honest answer has two halves. Plenty of families pay cash and are never contacted by anyone. The families who do get caught pay an average of about $25,000 in back taxes, penalties, and interest — and discovery almost never comes from an audit. It comes from a direction they never considered, most often a former nanny's routine unemployment claim.
This guide is a risk briefing, not a lecture. It covers what “under the table” means once the IRS is involved, the specific dollar amounts at stake, the six ways discovery actually happens, and the step-by-step catch-up path if you are already mid-employment. For the full federal compliance picture — thresholds, Schedule H, W-2s, quarterly payments — start with our complete nanny tax guide.
Once you pay a nanny $3,000 or more in 2026, you are a household employer, and paying cash off the books is tax evasion — not a gray area. Families who are caught pay an average of roughly $25,000 in back taxes, penalties, and interest, and the most common trigger is a former nanny's unemployment claim, not an IRS audit. The legal alternative costs less than most families fear: employer taxes run about 8–10% of gross wages, and the 2026 Dependent Care FSA lets you pay $7,500 of wages pre-tax — worth about $2,625 a year at a 35% marginal rate.
What Counts as Paying a Nanny Under the Table?
The IRS line is specific. Pay any household employee $3,000 or more in cash wages during 2026 and you owe Social Security and Medicare (FICA) taxes on those wages. Pay $1,000 or more in any calendar quarter and you owe federal unemployment (FUTA) tax too. “Under the table” simply means crossing those thresholds without withholding, reporting, or issuing a W-2 — and the payment method is irrelevant. Cash, Venmo, Zelle, and personal checks all count the same.
Two related moves are the same violation in better clothes. Paying part on the books and part in cash under-reports wages, which is still evasion. And issuing a 1099 instead of a W-2 misclassifies your nanny as an independent contractor — the IRS is explicit that a caregiver who works in your home, on your schedule, with your children is an employee. Misclassification carries its own penalty: 100% of the uncollected employee FICA, plus your employer share, plus fines.
The 6 Real Risks of Paying Off the Books
Ranked roughly by how often each one actually bites:
1. Back taxes — both halves
If the arrangement surfaces, you owe the employer share of FICA (7.65%) and the employee share you never withheld (another 7.65%), because that liability transfers to you. On a $52,000 salary, that is $7,956 per year before a single penalty is added.
2. Penalties that stack, with no expiration date
Failure-to-file and failure-to-pay penalties accrue monthly and can reach 25% of the unpaid tax, with interest compounding daily on top. Late W-2s add $60 to $340 per form. And because an unfiled return has no statute of limitations, the IRS can reach back through every year of the arrangement. There is no three-year safe horizon — the clock never started.
3. Criminal exposure in willful cases
Most discovered cases resolve as civil tax matters — you pay, painfully, and move on. But willful evasion is a felony carrying fines up to $100,000 and up to five years in prison under 26 U.S.C. § 7201. Prosecutions of parents are rare. The exposure is real for large, multi-year, plainly deliberate arrangements.
4. Wage claims you cannot defend
Off-the-books employment usually means no time records, and nannies are non-exempt employees owed 1.5x overtime past 40 hours a week under federal law. A former nanny claiming unpaid overtime can seek back wages plus an equal amount in liquidated damages — and without payroll records, her account of the hours generally stands. States stack their own rules on top: California adds daily overtime and waiting-time penalties of up to 30 days of wages (see our California nanny tax guide).
5. Forfeiting tax breaks you already fund
Families on legal payroll can run up to $7,500 through a Dependent Care FSA in 2026 — about $2,625 in annual tax savings at a 35% marginal rate — and may claim the Child and Dependent Care Credit besides. Cash payers get neither. Over a five-year nanny relationship, that is more than $13,000 surrendered to stay off the books.
6. A problem that compounds
Every additional year grows the back-tax base and weakens the voluntary-disclosure story. Year one reads as a correctable oversight. Year five reads as a pattern — and is priced accordingly in penalties.
How Do Families Actually Get Caught?
The IRS does not run stings on family payrolls. Discovery is triggered by ordinary paperwork — almost always filed by someone else:
| Trigger | How it unfolds |
|---|---|
| Unemployment claim (most common) | Your former nanny files for benefits and names you as her last employer. The state finds no wage records, opens an inquiry, and shares findings with the IRS. |
| Injury on the job | A workers' compensation claim — or an ER bill and a lawyer — with no policy and no employment records on file. |
| Nanny files her own taxes | She reports the income to earn Social Security credits or qualify for a mortgage, creating a wage record with no matching employer filing. |
| Form SS-8 request | Your nanny, or her tax preparer, asks the IRS to rule on whether she was an employee. The ruling lands on you. |
| Disputes and tip-offs | A contested firing, a divorce, or a neighbor — the IRS accepts third-party reports on Form 3949-A. |
| Public roles and clearances | Household employment history surfaces in vetting. It has ended cabinet nominations since Zoë Baird's in 1993. |
Notice the pattern: nearly every trigger starts with the nanny — usually not out of malice, but because she eventually needs a record of her own income. “She prefers cash” is a weaker shield than it sounds. Preferences change the day a mortgage application or a layoff arrives.
What Getting Caught Costs: A Worked Example
Take a common arrangement: $25/hour, 40 hours a week, paid in cash for two years — $52,000 a year, $104,000 total.
| Line item | Amount |
|---|---|
| Employer FICA never paid (7.65% × $104,000) | $7,956 |
| Employee FICA never withheld — now your liability (7.65% × $104,000) | $7,956 |
| FUTA (0.6% × first $7,000, two years) | $84 |
| Failure-to-file and failure-to-pay penalties (up to 25%) | ~$4,000 |
| Interest, compounding daily across two years | ~$1,600–$2,400 |
| Federal exposure alone | ~$21,600–$22,400 |
That table stops at federal taxes. Add state unemployment contributions, state penalties, and any overtime claim, and the industry's $25,000 average stops looking inflated. It starts looking optimistic.
What Your Nanny Gives Up in a Cash Arrangement
The honest accounting includes her side, because off-the-books pay costs caregivers more than families. A nanny paid in cash earns zero Social Security credits toward retirement and disability, cannot collect unemployment between jobs, has no workers' compensation if she is hurt at your home, and cannot show verifiable income for an apartment, a car loan, or a mortgage. Career nannies know all of this.
The Beverly team sees this from the hiring side: in competitive metros, “paid legally, on payroll” in a job posting measurably widens the candidate pool. Experienced nannies read it as a professionalism signal — roughly the way you would read an employer who offered to pay you in gift cards.
See what a coordinated search looks like. The research is the easy part. In two minutes, watch how a Beverly coordinator runs the rest — agencies, screening, and contracts — so you don't have to.
Watch: Meet Beverly · 2 min →How to Get Legal Mid-Employment: A 5-Step Catch-Up Plan
Getting compliant partway through employment is routine. CPAs handle it constantly, and the IRS is consistently more lenient with families who come forward than with families it finds. The mechanics:
Step 1: Have the payroll conversation with your nanny
If she negotiated her rate as take-home cash, converting to legal payroll means grossing up: a $25/hour net expectation is roughly a $29–$30/hour gross wage once her FICA and income-tax withholding come out. That is not precise — her W-4 elections drive the exact number — but budget a 15–20% gross-up so her paycheck does not shrink. Frame what she gains: Social Security credits, unemployment coverage, injury protection, and provable income.
Step 2: Get your EIN and register with your state
The federal Employer Identification Number takes minutes online. State registration matters just as much and moves faster than families expect — California, for example, requires EDD registration within 20 days of paying $750 in a quarter. Most states have similar quarterly thresholds.
Step 3: Start withholding on the very next paycheck
Do not wait for the back-year cleanup to settle. From the next payday, withhold the employee's 7.65% FICA share plus any income tax she elects on her W-4, and start keeping written time records. Overtime disputes die when records exist.
Step 4: Handle the back years with a professional
For prior years, a CPA experienced in household employment will typically amend your returns, file late Schedule H, and pursue penalty reduction — abatement is common for voluntary disclosure. How far back to go is a judgment call about your exposure, and it is the one step in this list not to do yourself.
Step 5: Put payroll on autopilot
A household payroll service calculates every withholding, files quarterly, and issues the W-2 each January for $49–$75 a month. Set it up once and compliance stops being a recurring decision. Our comparison of the best nanny payroll services covers the major providers; Poppins Payroll, at $49/month, is the one Beverly members use most.
The Bottom Line: Legal Costs Less Than the Fear Suggests
Run the real numbers on that $52,000 example. Employer taxes come to about $4,260 a year — FICA $3,978, FUTA $42, and roughly $240 of state unemployment tax on a typical first-$7,000 wage base. A Dependent Care FSA returns about $2,625 of that at a 35% marginal rate. Net annual cost of being legal: roughly $1,600, or about $135 a month — weighed against a $25,000 average downside, an indefensible overtime claim, and the low-grade stress of a multi-year secret.
That is the actual math of paying under the table: you are not saving the tax bill, you are renting it — at penalty interest rates, on a loan that can be called by someone else at any time. If payroll admin is what kept you off the books, that problem is solvable in an afternoon.
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Even though we work to keep the information, stats, and details in this article accurate and up to date, please do your own financial and legal due diligence before acting on anything you read here, and reach out directly to the private companies and government agencies referenced for the most current details.