Side-by-side cost math for nanny, nanny share, daycare, and home daycare. The hidden costs nobody talks about. Comparing apples to apples.
10 min readUpdated May 2026
TL;DR
For one child, daycare is usually cheaper. For two children, nanny share or nanny is often the same or cheaper, especially in expensive metros. The headline rate is rarely the real number. Add taxes, gas, sick days, and the cost of overlapping with a backup option, and the picture shifts. Run both numbers with our calculator before deciding.
Registration fee: $100-$500 one-time at most centers.
Annual supply fee: $50-$200 for art supplies, classroom materials.
Late pickup fees: Often $1/minute past closing. Bad weeks: $40-$100.
Diapers, wipes, sometimes formula: You supply. $80-$150/month.
Holiday and snow-day backup care: Centers close 12-18 days/year. If both parents work, you pay for backup care those days. $200-$800/year.
Sick days: Most centers send kids home for fevers, lice, hand-foot-mouth. Plan for 10-15 sick days/year per kid in year one of daycare.
Holiday gifts for teachers: $50-$150/year.
Mileage: Daycare commute adds 15-40 minutes per day if it's not on your route.
Hidden costs of nanny
Employer taxes: Social Security, Medicare, federal and state unemployment. Adds 9-12% to gross wages. Typically $4,500-$8,000/year on a $50-65K nanny.
Worker's comp insurance: Required in many states for household employees. $500-$1,200/year.
Paid time off: Industry standard is two weeks paid vacation + 5-10 sick days. Roughly $2,500-$3,500/year.
Mileage reimbursement: If nanny drives baby anywhere (library, music class, doctor), IRS standard mileage rate applies. Typically $300-$800/year.
Activity stipend: Music classes, indoor play, snacks, library trips. $50-$200/month.
Backup care when nanny is sick: Sitter, family, or you. Hard to quantify but real.
Payroll service: $50-$80/month for Poppins, GTM, or Care.com HomePay.
Annual raises: 3-5% per year is standard. Build it in.
End-of-year bonus: One week's pay is standard. Add $1,000-$1,400.
The one-child math
For one child in a mid-sized US city (sample numbers, adjust for your zip):
Daycare center, infant:
Tuition: $1,800/mo x 12 = $21,600
Registration + supplies: $400
Diapers/wipes: $1,200
Backup care: $400
Teacher gifts: $80
Total: ~$23,680/year
Full-time nanny, mid-sized city, $22/hr:
Gross wages: $22 x 40 x 50 (2 wks vacation) = $44,000
Paid vacation: $1,760
Employer taxes (10%): $4,400
Worker's comp: $700
Payroll service: $720
Mileage + activity stipend: $1,200
End-of-year bonus: $880
Total: ~$53,660/year
For one child, daycare is roughly $30K/year cheaper in this scenario. The gap shrinks in expensive metros where daycare is $2,500+/mo and grows in smaller cities where daycare is $1,200.
The two-child math (the flip point)
Most daycare centers offer a sibling discount of 10-15% on the second child. Most charge each child the full age-band rate.
Daycare center, infant + toddler:
Infant tuition: $1,800/mo
Toddler tuition with 10% sibling discount: $1,350/mo
Combined: $3,150/mo x 12 = $37,800
Hidden costs (doubled): $3,000
Total: ~$40,800/year
Full-time nanny for two kids, $25/hr (typical +$3/hr for second child):
Gross wages: $25 x 40 x 50 = $50,000
Paid vacation: $2,000
Taxes + comp + payroll: $6,000
Bonus + activities: $2,500
Total: ~$60,500/year
For two kids, the gap is about $20K. In an expensive metro, where infant daycare can hit $2,800/mo and toddler $2,200, the math gets very close to even.
Nanny share: the underrated middle path
A nanny share is two families employing one nanny, with both babies in the same home (usually rotating houses weekly or monthly). Best for one-baby families who want nanny-style care without the price tag.
Nanny share math, mid-sized city, $30/hr split, one child per family:
Per-family gross: $15/hr x 40 x 50 = $30,000
Taxes + comp + payroll: $3,500
Activities + bonus + miscellaneous: $1,500
Total per family: ~$35,000/year
This is meaningfully cheaper than a solo nanny and roughly competitive with daycare in expensive metros, with the upside of one-on-one (well, one-on-two) attention.
Get your zip-code-specific number
Our free daycare calculator pulls real local averages and shows you the all-in number with all hidden costs added.
Both daycare and nanny costs are eligible for two tax savings programs.
Dependent Care FSA (through employer): Up to $5,000/year of childcare costs pre-tax. Saves most families $1,200-$1,800/year in federal taxes.
Child and Dependent Care Tax Credit: 20-35% of up to $3,000 of childcare costs ($6,000 for two kids), depending on income. Worth $600-$1,200/year for most middle-income households.
You can't use the same dollars for both. Most CPAs recommend using the FSA first, then claiming the credit on any costs above the FSA cap.
The factors that aren't money
The cost math is half the decision. The other half:
Sick day coverage. Daycare = your problem. Nanny = nanny's problem (unless she's also sick).
Socialization. Daycare wins hands down. Nannies + playgroups can mitigate.
Illness frequency. Daycare kids get sick more in year one. By year two, often the same.
Logistics. Daycare = drop-off and pickup are on you. Nanny = the workday is the workday.
Single point of failure. Nanny = if she quits, you scramble. Daycare = if a teacher quits, the center handles it.
Curriculum. Daycare often has structured learning. Nanny depends on her training and energy.
The hybrid model
Some families combine: daycare four days a week + a part-time sitter for the fifth day or for evenings. Cost lands between the two single options but adds flexibility many families value. Worth running the math for your specific schedule.
Making the call
The right answer is almost never universal. The questions that usually crack the decision:
Do you have flexible work or a partner with flexible work? (More flex = daycare works fine.)
How many kids will you have in care during the same window? (Two or more = nanny gets competitive.)
How long is your daycare's waitlist? (Many infant rooms are 6-18 months out.)
What's your tolerance for sick-day chaos? (Low tolerance = nanny.)
What does your zip code's daycare actually cost? (Run the calculator. Don't assume.)
Most parents pick wrong by either underestimating nanny taxes or overestimating daycare's downsides. Run the real numbers, factor in the time costs, and trust the math.