The Nanny Interview Playbook -- interview questions, red flags, trial days, and legal requirements
 

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GARRY'S TAKE

 
Tuesday, March 3, 2026 · Playbook
PLAYBOOK

STEP-BY-STEP GUIDE

The Nanny Interview Playbook

A research-backed guide to hiring household childcare in San Francisco, from first interview to signed contract.

By Garry Sandcastle

 
1

Prepare Behavioral and Situational Questions

Focus on past behavior as a predictor of future behavior. Ask about discipline scenarios they've actually handled, communication cadence with parents (daily logs, photos, notes), and conflict resolution. For situational questions: choking response, public tantrums, differing rules vs. nanny beliefs. Ask for step-by-step plans, not vague answers.
 
2

Screen for Red Flags During the Interview

Watch for: late arrival or taking calls during the interview, thin or unverifiable references, resistance to background checks (especially TrustLine in California), negative talk about prior families, and pushing for under-the-table pay. The biggest red flag? Poor engagement with the child during the meeting.
 
3

Run a Structured Trial Day

Set clear expectations and a written routine in advance. Be present the first 30-60 minutes, then leave the home for a block to assess independence. Observe warmth, initiative, safety instincts, and calm under stress. Pay fairly for trial hours. Debrief at end and solicit open-ended feedback from the child.
 
4

Complete Background Checks

In California, TrustLine is the gold standard -- state-authorized fingerprint check accessing CA DOJ, FBI criminal databases, and the CA Child Abuse Central Index. Supplement with a national FCRA-compliant screening (Checkr, GoodHire, or Sterling). Include: identity/SSN trace, multi-jurisdiction criminal, sex-offender registry, and MVR if driving.
 
5

Understand Legal Requirements

California Domestic Worker Bill of Rights: overtime at 1.5x over 9 hrs/day or 45 hrs/week. Workers' comp is mandatory. Federal: obtain EIN, issue W-2, file Schedule H. CA EDD household employer registration when wages hit $750/quarter. SF paid sick leave: accrual 1 hr per 30 hrs worked, cap 40-72 hrs. SF minimum wage: $19.18 as of July 2025.
 

CHECKLIST

☐ Prepare written interview questions (behavioral + situational)
☐ Verify CPR/First Aid certification is current
☐ Request and call 3+ phone references (not just letters)
☐ Run TrustLine background check (CA-specific)
☐ Run national criminal + sex offender screening
☐ Check MVR if nanny will drive with child
☐ Draft written work agreement with scope, hours, pay, PTO
☐ Set up payroll (Poppins Payroll, HomeWork Solutions, or GTM)
☐ Obtain workers' comp coverage (homeowner's policy endorsement)
☐ Schedule and pay for a trial day
 

WATCH OUT

PITFALL

Skipping TrustLine Because "They Seem Nice"

TrustLine accesses databases that standard commercial background checks cannot -- including the CA Child Abuse Central Index. It is not optional for California families hiring in-home childcare.

PITFALL

Paying Under the Table

Besides being illegal, it exposes you to back taxes, penalties, and loss of dependent care FSA benefits. It also leaves your nanny without unemployment insurance, workers' comp, or Social Security credits.

PITFALL

Vague "Light Housekeeping" Expectations

Define concretely what housekeeping means: child's laundry only? Kitchen cleanup after meals? Time-box it. Ambiguity here is the top source of nanny-family friction.

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