Most people pick a network type by reputation. HMOs are “the cheap restrictive ones” and PPOs are “the expensive flexible ones,” and that shorthand is roughly half right and expensively wrong on the other half.
This page compares HMO vs PPO insurance on the numbers that are actually measured: enrollment, total premium, what comes out of your paycheck, and how likely you are to face a deductible at all. All employer-market figures come from KFF’s 2025 Employer Health Benefits Survey, which is the most recent edition as of September 2026 (KFF publishes the next one in October). Plan definitions come from HealthCare.gov and CMS.
The Two Differences That Actually Matter
Strip away the marketing and HMO and PPO plans differ on two things.
Out-of-network coverage. HealthCare.gov defines an HMO as a plan that “generally won’t cover out-of-network care except in an emergency.” A PPO is defined as a plan where “you can use doctors, hospitals, and providers outside of the network for an additional cost.” KFF’s survey uses the same split, defining an HMO as a plan that does not cover non-emergency services provided out of network.
Referrals. CMS’s February 2026 consumer flyer on provider networks says a PPO lets you use outside providers “without a referral,” and lists the referral requirement under POS plans, not HMOs. Neither the HealthCare.gov glossary nor KFF’s definition attaches a referral requirement to HMOs at all. Plenty of real HMOs do use a primary care gatekeeper, but it is a per-plan design decision, not a defining feature. Read the plan documents instead of assuming.
Everything else people cite (narrower networks, prior authorization, service-area rules) follows from those two choices rather than defining them.
HMO vs PPO Plans: The Numbers
PPOs remain the default. KFF found 46% of covered workers in a PPO in 2025, 33% in a high deductible plan with a savings option, 12% in an HMO, 9% in a POS plan and under 1% in conventional coverage.
Geography matters more than most comparisons admit. HMO enrollment runs 24% of covered workers in the West and 7% in the Midwest, while PPO enrollment runs 53% in the South and 37% in the West. In much of the country the HMO option on your menu is theoretical.
| 2025 employer coverage (KFF EHBS) | HMO | PPO | All plan types |
|---|---|---|---|
| Share of covered workers | 12% | 46% | 100% |
| Total annual premium, single | $9,229 | $9,818 | $9,325 |
| Total annual premium, family | $27,277 | $28,272 | $26,993 |
| Worker contribution, single | $1,299 | $1,514 | $1,440 |
| Worker contribution, family | $7,680 | $7,075 | $6,850 |
| Share with no deductible, single | 47% | 12% | 12% |
| Average deductible if you have one, single | $1,649 | $1,337 | $1,886 |
Three things in that table are worth stopping on.
The single-coverage premium gap is real but small. $215 a year in payroll deductions, or about $18 a month. That is a rounding error next to one out-of-network imaging bill, which is why the network question should usually beat the premium question.
Family coverage flips the result. HMO workers contributed $605 more per year toward family coverage than PPO workers did. The gap holds at both firm sizes: at large firms it was $6,949 for an HMO against $6,581 for a PPO. “HMO equals cheaper” is simply not true for families in the 2025 data.
The deductible story is the opposite of the premium story. Nearly half of HMO enrollees have no general annual deductible for single coverage. Among the minority who do, the average HMO deductible ($1,649) is actually higher than the PPO average ($1,337). Applying KFF’s own convention of scoring a no-deductible worker as zero, that works out to roughly $870 of average HMO deductible exposure against roughly $1,180 in a PPO, which is our arithmetic on KFF’s two published figures rather than a KFF-published number.
Add the two effects for single coverage and the average HMO enrollee was ahead by about $500 a year before anyone left the network.
One caveat you need before quoting any of this. KFF groups EPOs in with HMOs and indemnity plans in with PPOs, and treats any plan with a savings account as HDHP/SO even when it is structurally a PPO or HMO. So the PPO row above is a non-HDHP PPO row, and the HMO row includes EPOs. It measures plan families as employers offer them, not network design in a laboratory.
PPO vs HMO: Which Is Better for Your Situation
There is no general answer, but there are clean decision rules.
Choose the PPO when a specific provider is non-negotiable. An oncologist mid-treatment, a children’s hospital two states away, a surgeon with a two-year relationship. Paying $215 more a year for single coverage to keep the option of partial out-of-network payment is cheap insurance against a total denial.
Choose the PPO if you travel or live between metro areas. HMOs can require you to live or work in the service area, and non-emergency care on the road is generally not covered.
Choose the HMO when your care is routine and local. If your doctors are in the network, you get the lower single premium plus a roughly even chance of no deductible at all. Nearly half of HMO enrollees never touch a deductible for single coverage.
Choose the HMO if you want predictable per-visit pricing. The cost-sharing structures differ sharply. For hospital admissions, KFF found 70% of PPO enrollees face coinsurance (a percentage) against 45% in HMOs, while 28% of HMO enrollees face a flat copay against 11% in PPOs. For outpatient surgery, 72% of PPO enrollees face coinsurance against 37% in HMOs. Copays are knowable in advance; coinsurance is not. If that distinction is new, copay vs coinsurance walks through it.
Do not choose on the deductible label alone. A high deductible is a separate axis from the network, and HDHP vs PPO explains why one plan can be both. The related detail on both sides is the health insurance deductible and the out-of-pocket maximum, which for 2027 cannot exceed $12,000 for self-only or $24,000 for family coverage under CMS guidance, up from $10,600 and $21,200 in 2026.
HMO vs PPO vs EPO, and Where POS Fits
The four network types sit on one spectrum defined by two questions: does the plan pay anything outside the network, and does it make you route through a primary care doctor.
| Network type | Pays out of network? | Referral for a specialist? | Where it sits |
|---|---|---|---|
| HMO | Generally no, except emergencies | Varies by plan | Tightest network, lowest single premium |
| EPO | No, except emergencies | Generally no | HMO-style network without the gatekeeper |
| POS | Yes, with a referral | Yes | Middle ground on both questions |
| PPO | Yes, at higher cost | No | Widest access, highest premium |
Definitions are HealthCare.gov’s and CMS’s. Note that EPO and HMO differ only on the referral question, which is exactly why KFF folds them together in its survey and publishes no separate EPO figure. For the depth on each pairing, see EPO vs PPO and POS plan vs PPO. POS is the shrinking option: 9% of covered workers overall, but 19% at small firms against 6% at large ones.
Whichever you pick, the mechanics of what “in network” means for a given bill are the same, and in-network vs out-of-network covers those. If you want the PPO side in depth, including the two-tier cost sharing, what is a PPO plan is the companion page.
What Each One Means If You End Up Paying Cash
This is the part plan-comparison articles skip, and for a cash-pay reader it is the whole question.
On an HMO, out-of-network care is usually a full-price event. The plan pays nothing for non-emergency care outside the network, so you are a self-pay patient with no discount and no credit toward your deductible or out-of-pocket maximum. There is no middle setting.
On a PPO, out of network is a partial-price event that can still cost more than cash. The plan pays a percentage of an allowed amount it sets, not of the bill. HealthCare.gov’s own example of balance billing is a $100 charge against a $70 allowed amount, leaving $30 the provider may bill you directly. A preferred (in-network) provider may not balance bill you; an out-of-network one generally can. And under 45 CFR 156.130(c), a network plan is not required to count out-of-network cost sharing toward the annual limitation on cost sharing at all, so the out-of-pocket maximum that caps your in-network year may not cap this one.
The practical consequence is the same on both plan types. Before you use an out-of-network benefit, ask the provider for the self-pay or prompt-pay price and compare it against your share of the allowed amount plus any balance bill. Cash sometimes wins outright, and it always wins on predictability. Hospitals must publish a discounted cash price alongside their negotiated rates, and hospital price transparency explains how to find it. For big-ticket imaging the spread is enormous, as MRI cost without insurance shows. If a bill has already landed, how to negotiate medical bills covers what to ask for after the fact.
Two more things worth knowing. CMS says you can ask your plan for an exception so out-of-network care is covered at in-network rates, and you may qualify as a continuing care patient if your provider’s contract is terminated mid-treatment. And if you are weighing whether the coverage is worth buying at all, self-pay vs health insurance works that comparison directly.
The Bottom Line
For single coverage, the HMO was cheaper on both fronts in 2025: $215 less in annual worker contributions and a roughly $300 smaller expected deductible, because 47% of HMO enrollees have no deductible at all. For family coverage the premium advantage disappears and reverses by $605.
None of that decides it. The deciding question is what happens the day you need a provider who is not in the network, because an HMO answers “nothing” and a PPO answers “a share of an amount we choose, and the out-of-pocket cap may not apply.” Price that risk honestly against a $215 annual premium gap, and check both plans’ provider directories before open enrollment closes rather than after. If you miss the window, qualifying life event covers the narrow set of reasons you can switch mid-year.