Paying a nanny in cash, off the books, is common — and it feels like the frictionless option. No forms, no withholding, no year-end paperwork. The trouble is that the risk doesn't disappear; it just sits quietly until a single event brings it into the open.

How it usually unravels

Under-the-table arrangements rarely get discovered by a random audit. They come apart at a predictable moment — often one you can't control:

  • Your nanny files for unemployment after the job ends, and the state finds no reported wages.
  • Your nanny needs proof of income for an apartment or a loan, and asks for pay records that don't exist.
  • The relationship ends badly, and a disgruntled former employee reports the arrangement.
  • Your nanny gets injured and there's no workers'-comp or paper trail to fall back on.

What it costs when it surfaces

Once unreported wages come to light, the bill lands on the employer. You can be responsible for the back employment taxes — including the employee's share you never withheld — plus interest and penalties for late payment and failure to file. What looked like savings becomes a larger, messier liability.

Failure-to-file and failure-to-pay penalties compound over time. A few years of unreported wages can turn into a bill several times larger than the taxes you would have owed by doing it right.

Who it hurts most

The person with the least power in the arrangement — your nanny — often carries the heaviest cost of being paid off the books:

  • No Social Security or Medicare credits building toward their future.
  • No unemployment safety net if the job ends.
  • No documented income for renting, borrowing, or immigration matters.
Doing it on the books is often what a good nanny quietly hopes for. It's a sign you take the relationship — and their future — seriously.

The easier, safer path

The reason families reach for cash is that payroll feels hard and expensive. It isn't anymore. The recurring work is entering hours and handing over a stub; the taxes are computed for you; and the software to do it is free.

Trade the quiet risk for a clean paper trail. House runs on-the-books nanny payroll for free — withholding, stubs, and year-end forms included.

Do it on the books

The bottom line

Under the table isn't cheaper — it's deferred and unpredictable, with the bill landing on you at the worst possible moment, and the harm falling hardest on your nanny. On-the-books pay removes the risk entirely, and it no longer costs a subscription to do.