Young children in daycare or preschool average 6 to 10 viral illnesses per year per the American Academy of Pediatrics. Layer two kids together and you can hit 12 to 20 family sick visits in a year, before any injuries or surgeries. On an HDHP, every one of those office visits applies to the deductible until the family deductible is met. On a PPO, each visit is a $30 to $50 copay. The math often flips on family HDHPs when kids are under 5, even when the premium gap looks favourable on paper.
This page covers the kid-utilisation patterns by age, the aggregate vs embedded family deductible distinction (most underexplained feature of family HDHPs), and the seven family scenarios we see most often, with the realistic answer for each.
Annual healthcare spending for children follows a U-curve. Infants and toddlers (0 to 3) consume the most healthcare due to frequent illness, developmental monitoring, and immunisation schedule. Spending dips in elementary school years (6 to 11) when the immune system has matured. Spending rises again in adolescence (12 to 17) due to mental health needs, sports injuries, orthodontics, and routine reproductive health care.
Per MEPS 2024 data, average annual medical spending for children under age 5 was approximately $1,800, for ages 5 to 11 about $1,500, and for ages 12 to 17 about $2,200. These are insurance-paid amounts plus out-of-pocket, billed amounts run 1.5 to 2.5x higher.
| Family profile | Typical annual spend | Verdict | Note |
|---|---|---|---|
| 1 healthy school-age kid, 2 parents healthy | $2,500/year total family medical | HDHP wins | Annual physicals, occasional sick visit, no complications |
| 1 daycare toddler, 2 parents healthy | $4,500-$6,500/year | Close, leaning HDHP | Frequent ear infections, possible tubes surgery year 3 |
| 2 daycare kids (ages 2 and 4), 2 parents healthy | $6,500-$10,000/year | PPO usually wins | Compound sick visits, family deductible reset on January 1 hurts |
| 3 kids (1 with asthma, 2 healthy), 2 parents healthy | $8,000-$15,000/year | PPO wins | Asthma adds specialist visits, ER risk, daily inhaler costs |
| 1 teenager (15) doing competitive sports, 2 parents healthy | $3,000-$8,000/year | Variable, run the calculator | Sports injuries are unpredictable, one ACL surgery year skews dramatically |
| 1 kid with severe allergies (EpiPen, immunotherapy) | $5,000-$12,000/year | PPO wins on predictability | EpiPen $750 list, allergist visits, ER risk for anaphylaxis events |
| Newborn + toddler, mom recovering from delivery | $12,000-$25,000/year | PPO wins strongly | Newborn well visits, recovery care, toddler regular care all stacking |
This is the single most underexplained feature of family HDHPs, and it changes the answer materially. The 2026 IRS HDHP minimum family deductible is $3,400, but how that deductible is structured matters as much as the dollar amount.
Aggregate family deductible: the entire $3,400 must be met collectively by all family members before any individual's post-deductible benefits apply. If your kid has $3,400 of medical bills in March, the rest of the family is also through the deductible. But if no single member hits the deductible alone, nobody gets post-deductible coinsurance benefits until the family aggregate is met.
Embedded family deductible: each individual family member is capped at a self-only deductible amount (often equal to the IRS minimum HDHP self-only deductible of $1,700 in 2026), even within a family plan. If your kid hits $1,700 of medical bills, that kid is into post-deductible coinsurance for the rest of the year, regardless of what the rest of the family has spent. The family aggregate of $3,400 is also tracked separately.
Most modern family HDHPs are embedded, but not all. An aggregate-deductible HDHP is meaningfully worse for families with one heavy-user child and several light-user members, because the heavy-user child does not break into post-deductible coinsurance until the whole family aggregate is met. Read your Summary of Benefits and Coverage carefully, the structure is usually disclosed in a single line near the deductible disclosure.
For more detail on the structural difference, see our dedicated aggregate vs embedded explainer.
The ACA preventive care mandate covers well-child visits at 100 percent on all compliant plans, including HDHPs, regardless of deductible status. The covered visits follow the American Academy of Pediatrics Bright Futures schedule: 9 visits in the first year, 3 in the second year, 2 per year through age 4, then annually through age 21.
Recommended vaccines per the CDC immunisation schedule are covered at 100 percent, including all routine childhood vaccines, HPV vaccine for ages 9 to 26, flu vaccine annually, and COVID-19 vaccine for eligible ages. Lead screening, vision and hearing screening, developmental screening, and behavioural health screening at well visits are all covered preventive services.
What does not count as preventive: sick visits triggered by an illness, vision exams for diagnostic purposes (the well visit's vision screening counts, an actual eye exam for prescription glasses does not), dental cleanings (usually a separate dental plan), and any specialist referral for evaluation of a specific symptom. These all apply to the HDHP deductible.
Kids end up in the ER. The National Hospital Ambulatory Medical Care Survey reports children under 15 had approximately 27 million ER visits annually in 2022, roughly one visit per 5 children per year. Common reasons: high fevers, asthma exacerbations, head injuries from falls, suspected appendicitis, swallowed objects, fractures.
A single uncomplicated pediatric ER visit averages $1,500 to $4,000 billed. With imaging (CT scan, X-ray, ultrasound), it can hit $4,500 to $8,000. With admission, often $15,000+. On an HDHP, a single ER visit can blow through the family deductible. On a PPO with $200 to $400 ER copays (often waived if admitted), the same visit costs $300 to $600 out of pocket.
The math: if you have two kids and they each have a 20 percent chance of an ER visit in a given year (probability that compounds), the expected family ER cost on an HDHP is $1,000 to $2,500 per year just from this risk factor. The PPO version of this expected cost is $200 to $400. Add the regular sick-visit volume and the PPO advantage for families with young kids reaches $1,500 to $4,000 per year in many scenarios.
A common optimisation for dual-income couples both with employer coverage: parent A stays on self-only HDHP for the HSA tax benefits and HSA-as-retirement play. Parent B and the kids are on parent B's PPO for predictable copays.
Parent A contributes to the HSA at the self-only limit ($4,400 in 2026), captures the federal income tax savings ($968 at 22 percent bracket) and FICA savings ($337), and keeps the HDHP premium savings ($60 to $120/month). The kids and parent B get PPO copay predictability for the high-utilisation years.
Total household savings versus putting the whole family on one plan: usually $1,500 to $3,500 per year, plus the long-term HSA growth on parent A's contributions. The catch: this only works if both parents have employer coverage with reasonable plan options. For single-income families or families where one employer has dominant benefits, the split-family strategy is not available.
Children in daycare average 6 to 10 viral illnesses per year between ages 1 and 3, per the American Academy of Pediatrics. Each ill visit billed runs $150 to $300 office, $300 to $600 urgent care, and $1,500 to $4,000 ER. A family with two preschoolers can easily accumulate 12 to 20 sick visits per year. On an HDHP, each visit applies to the deductible until it is hit. On a PPO, each visit is a $30 to $50 copay.
Yes. Well-child visits including immunisations are covered at 100 percent on all ACA-compliant plans regardless of HDHP or PPO type. These visits include developmental screening, growth monitoring, recommended vaccines per the CDC immunisation schedule, and recommended USPSTF preventive services. You pay nothing for the visit itself or for the vaccines administered during the visit.
Aggregate family deductible: the whole family must collectively meet the family deductible ($3,400 minimum for 2026 HDHP) before any individual coverage kicks in past the deductible. Embedded family deductible: each individual family member is capped at the self-only deductible amount, even within a family plan. Embedded is more favourable for families with one heavy-user member and several light-user members. Most modern family HDHPs are embedded, but read your plan's Summary of Benefits and Coverage to confirm.
HDHP can still win with kids when: family is generally healthy with low total annual medical spending (under $4,000), employer HSA seed is substantial ($1,500+), premium gap exceeds $200/month, and you have cash reserves to absorb a multi-thousand-dollar deductible surprise without strain. The HSA tax shield benefits compound over the decades the kids will be on your plan. Healthy stay-at-home parent with healthy school-age kids: HDHP often still wins. Two kids in daycare with frequent infections: PPO usually wins.
Yes, this is a common split-family strategy. You stay on the HDHP for the HSA tax benefits. Kids are on the spouse's PPO for predictable copays. The HSA contributor must have self-only HDHP coverage, which limits HSA contribution to the self-only limit ($4,400 in 2026, plus $1,000 catch-up if 55+). The household saves money when the kids' realistic medical use exceeds the family deductible reset on a family HDHP.
Not insurance or medical advice. Utilisation data from MEPS 2024, AAP Bright Futures schedule, and National Hospital Ambulatory Medical Care Survey 2022. Cost ranges illustrative based on FAIR Health Consumer data. Verify plan-specific aggregate vs embedded deductible structure in your SBC before assuming behaviour.