HDHP vs PPO for 2027 Open Enrollment: New $4,500 HSA Limits and the Break-Even Math Before You Click Keep My Plan

If you get health insurance through work, open enrollment is happening now — and clicking "keep my current plan" can be an expensive mistake for 2027. The IRS has already locked in new Health Savings Account limits: $4,500 for self-only coverage and $9,000 for family coverage, up from $4,400 and $8,750 in 2026. High-deductible health plans (HDHPs) that pair with those accounts must meet slightly higher deductible and out-of-pocket floors too. Meanwhile, traditional PPO plans still win for some households. This guide walks through the HDHP vs PPO decision with the official 2027 numbers, a five-figure break-even test, FSA vs HSA traps, and a checklist before your employer's deadline closes.

Educational only — not tax, legal, insurance, or financial advice. Plan designs and employer rules vary. Confirm every figure on your Summary of Benefits and Coverage (SBC), plan documents, and IRS.gov before you elect.

Why 2027 open enrollment is different from last year

Most U.S. employers run open enrollment in October or November so coverage starts January 1. Miss the window and you usually wait a full year unless you have a qualifying life event (marriage, birth, loss of other coverage, and similar plan-defined events).

Three things make this cycle worth a fresh look:

• New HSA and HDHP thresholds for 2027 — published by the IRS in Revenue Procedure 2026-24 on May 29, 2026. Contribution caps, minimum deductibles, and HDHP out-of-pocket maximums all rose.
• ACA out-of-pocket caps jumped — for plan years beginning in 2027, HHS set the maximum annual limitation on cost sharing at $12,000 self-only and $24,000 family, up from $10,600 / $21,200 in 2026. Employer PPOs can sit below those caps, but the ceiling rose sharply.
• Premiums and deductibles on your own menu likely moved — even if the plan name looks familiar, the employee premium, deductible, and coinsurance often change every year. Auto-renewing last year's "winner" without reopening the PDF is how people overpay.

If you buy coverage on HealthCare.gov or a state Marketplace instead of through an employer, open enrollment for 2027 coverage starts November 1, 2026. Enroll by December 15 for a January 1 start; the federal window ends January 15, 2027. This article focuses on the employer HDHP vs PPO choice, but the same cost math applies if you're comparing Marketplace metal tiers.

The official 2027 HSA and HDHP numbers (IRS Rev. Proc. 2026-24)

These are the federal rules that decide whether a plan can pair with an HSA. Your employer can be stricter, but it cannot go below the deductible floors or above the HDHP out-of-pocket caps and still call the plan HSA-eligible.

Limit	2026	2027	Change
HSA contribution — self-only	$4,400	$4,500	+$100
HSA contribution — family	$8,750	$9,000	+$250
HSA catch-up (age 55+)	$1,000	$1,000	unchanged
HDHP minimum deductible — self-only	$1,700	$1,750	+$50
HDHP minimum deductible — family	$3,400	$3,500	+$100
HDHP max out-of-pocket — self-only	$8,500	$8,700	+$200
HDHP max out-of-pocket — family	$17,000	$17,400	+$400
Excepted-benefit HRA newly available amount	$2,200	$2,250	+$50

Employer contributions count toward the same annual HSA ceiling. If your company deposits $1,000 into a family HSA, the most you can add yourself in 2027 is $8,000 ($9,000 − $1,000), plus the $1,000 catch-up if you turn 55 by year-end.

One more 2027 detail from the same revenue procedure: under a 2025 law change, a direct primary care service arrangement generally does not disqualify you from an HSA if monthly fees stay at or below $150 for an individual arrangement or $300 when the arrangement covers more than one person (those fee caps apply for calendar year 2027).

HDHP vs PPO in plain English

PPO (preferred provider organization): Usually a higher paycheck premium, a lower deductible, and copays for primary care and specialists. You can often see out-of-network doctors for a higher share of the bill. PPOs do not pair with an HSA.

HDHP (high-deductible health plan): Usually a lower paycheck premium and a higher deductible that meets the IRS floors above. After you hit the deductible, you typically pay coinsurance until you reach the out-of-pocket maximum. If the plan is HSA-eligible and you have no disqualifying other coverage, you can contribute to an HSA — the account with the so-called triple tax advantage (pre-tax contributions, tax-free growth, tax-free withdrawals for qualified medical expenses).

Neither design is automatically "better." The right answer depends on five numbers from your benefits booklet, not a blog post average.

The five-number test before you click "keep my plan"

Open your Summary of Benefits and Coverage for each option and write down:

1. Your annual premium — paycheck deduction × number of pay periods (26 if biweekly, 24 if semimonthly, 12 if monthly).
2. In-network deductible — what you pay before coinsurance starts.
3. Coinsurance — your share after the deductible (often 10%, 20%, or 30%).
4. Out-of-pocket maximum — the most you pay for covered in-network care in the plan year (premiums don't count).
5. Employer HSA contribution — only on the HDHP side; treat it as cash that cuts the HDHP's true cost dollar for dollar.

Then estimate your family's medical spending for a normal year and a bad year. Include prescriptions, therapy, imaging, and planned procedures. Ignore premiums when you tally "spending" — premiums are separate.

Rough total cost formulas:

• PPO total ≈ annual premium + out-of-pocket medical costs under the PPO rules (capped at the PPO OOP max).
• HDHP total ≈ annual premium + out-of-pocket medical costs under the HDHP rules − employer HSA deposit − tax savings on your HSA contribution.

Tax savings on your own HSA contribution equal roughly your contribution × your marginal federal rate (and state rate if your state follows federal treatment). Employer HSA money is already excluded from your taxable wages, so don't double-count a tax break on it.

Worked examples with illustrative 2027 plan numbers

These examples use round numbers so you can see the logic. Replace them with your SBC. Assume self-only coverage, a 22% federal bracket, and that the employee contributes $3,000 to the HSA when on the HDHP (tax savings ≈ $660). Employer HSA seed = $750.

Illustrative PPO: employee premium $4,800/year, $1,000 deductible, 20% coinsurance, $5,000 OOP max.

Illustrative HDHP: employee premium $2,400/year, $1,750 deductible (meets the 2027 IRS floor), 20% coinsurance, $5,000 OOP max, plus the $750 employer HSA and $660 tax savings.

• Healthy year ($500 of care): PPO ≈ $4,800 + $500 = $5,300. HDHP ≈ $2,400 + $500 − $750 − $660 = $1,490. HDHP wins by about $3,800.
• Average year ($3,500 of care): PPO ≈ $4,800 + $1,000 + 0.2×$2,500 = $4,800 + $1,500 = $6,300. HDHP ≈ $2,400 + $1,750 + 0.2×$1,750 = $2,400 + $2,100 − $750 − $660 = $3,090. HDHP still ahead by about $3,200.
• Rough year ($10,000 of care): PPO hits coinsurance then caps — OOP ≈ $1,000 + 0.2×$9,000 = $2,800 (under the $5,000 max), total ≈ $7,600. HDHP OOP ≈ $1,750 + 0.2×$8,250 = $3,400, total ≈ $2,400 + $3,400 − $750 − $660 = $4,390. HDHP still wins here because the premium gap is large.
• When the PPO can win: if the HDHP premium savings are small, the employer HSA seed is $0, you can't fund the HSA, and you expect very high utilization (or someone in the family needs frequent specialist visits with rich PPO copays), run the numbers again. A PPO with $2,000 premiums and $20 specialist copays can beat a skinny HDHP for a household with monthly specialists.

The chart above plots the same illustrative pair across spending levels. Your crossover point will move when you plug in real premiums.

HSA vs FSA: don't mix them up at enrollment

Open enrollment screens often show both accounts. They are not interchangeable.

• HSA — only with an HSA-eligible HDHP. Unused balances roll forever, can be invested, and stay with you if you change jobs. 2027 caps: $4,500 / $9,000 (+ $1,000 age 55+).
• Health FSA — available with many PPOs (and some other plans). Use-it-or-lose-it with limited carryover or grace period if your plan allows. The IRS set the 2026 employee salary-reduction limit at $3,400 (carryover up to $680 if the plan permits). The official 2027 health FSA limit had not been announced as of October 12, 2026; employers typically update portals once the fall revenue procedure posts. Do not guess a 2027 FSA figure — wait for your benefits guide or IRS.gov.
• Dependent care FSA — separate from health accounts. For 2026 and 2027 the household limit is $7,500 ($3,750 if married filing separately) under the temporary increase enacted in 2025 legislation; it is not inflation-indexed the same way as HSAs. You generally cannot have a full-purpose health FSA and contribute to an HSA in the same month (limited-purpose FSAs for dental/vision are the common exception).

If you switch from a PPO+FSA to an HDHP+HSA mid-year transition, ask HR how leftover FSA dollars and HSA eligibility interact for the months after the plan change. Getting this wrong can create excess contributions you later have to remove.

Who usually should lean HDHP — and who should not

HDHP + HSA tends to fit if you:

• Are generally healthy or have predictable, moderate care needs.
• Can cash-flow a $1,750+ deductible without credit cards (or will pre-fund the HSA from day one).
• Get a meaningful employer HSA contribution.
• Want a long-term medical savings vehicle that can invest and roll for decades — including as a stealth retirement account after age 65 for non-medical withdrawals (taxed like a traditional IRA then, without the medical-expense penalty).
• Are in a higher tax bracket, so the HSA deduction is worth more.

A PPO (or richer plan) tends to fit if you:

• Have ongoing specialists, expensive specialty drugs, planned surgery, fertility treatment, or a pregnancy expected early in the year.
• Cannot comfortably absorb the HDHP deductible even with an HSA.
• Get little or no employer HSA help and the premium gap vs the PPO is small.
• Need the predictable copay structure more than the HSA tax break.

Networks, drugs, and the SBC pages people skip

Premium math is only half the decision. Before you enroll:

• Confirm your doctors and hospitals are in-network for 2027 — directories churn every year.
• Check the drug formulary for every maintenance medication. A drug that was Tier 2 on the PPO can be Tier 3 or non-covered on the HDHP (or the reverse).
• Read the deductible exceptions. Many HDHPs cover ACA preventive services before the deductible. Some also cover certain drugs or telehealth. Those details change the true "first-dollar" cost.
• Compare out-of-network rules. PPOs often pay something out of network; many HDHPs pay little or nothing until a separate, higher deductible.
• Watch embedded vs aggregate family deductibles. On family HDHPs, an aggregate deductible means one person may have to meet the full family deductible alone before coinsurance helps.

Other benefits to revisit in the same sitting

While the benefits portal is open, run this short secondary checklist:

• Dental and vision — break-even against expected cleanings, glasses, or a known procedure; see our recent open-enrollment dental/vision guide if you need the worksheet.
• Life and disability — group life is often 1× salary and portable options are limited; disability insurance replaces income and is easy to under-buy.
• 401(k) contribution rate — at least capture the full match. Official 2027 401(k)/IRA dollar limits are expected from the IRS in November 2026; for 2026 the elective deferral limit is already $24,500 ($8,000 catch-up age 50+, or $11,250 for ages 60–63).
• Commuter benefits and voluntary add-ons (accident, hospital indemnity, critical illness) — only if the math beats self-insuring a similar emergency fund.

Medicare households are on a different calendar: Medicare Advantage and Part D Annual Enrollment runs October 15 through December 7, 2026 for coverage starting January 1, 2027. Do not confuse that window with your employer's open enrollment.

Your 20-minute open enrollment checklist

1. Download the 2027 SBC PDFs for every medical option.
2. Fill in the five numbers (premium, deductible, coinsurance, OOP max, employer HSA).
3. Estimate a normal-year and bad-year medical spend for your household.
4. Compute PPO total vs HDHP total, including HSA tax savings.
5. Verify doctors, hospitals, and every prescription on the 2027 network/formulary tools.
6. Decide HSA vs health FSA vs dependent care FSA — and avoid disqualifying combinations.
7. Set the HSA contribution election high enough to use the new $4,500 / $9,000 room if you choose the HDHP (minus employer deposits).
8. Screenshot or save confirmations before you log out. Deadlines are hard.

How to talk to HR without getting a sales pitch

Benefits vendors are trained to explain options, not to optimize your household taxes. Go into the webinar or office hours with specific questions:

• "What is the employer HSA contribution for self-only and family, and is it deposited up front or pro-rated each paycheck?"
• "Is the family HDHP deductible embedded or aggregate?"
• "Which of my prescriptions are on the 2027 formulary, and at what tier, on each medical option?"
• "If I elect the HDHP, can I also keep a limited-purpose FSA for dental and vision?"
• "What is the exact employee-only premium for each tier, and are there spousal or tobacco surcharges?"

Write the answers into your five-number sheet the same day. Memory fades; payroll deductions do not.

If your company offers a decision-support tool or telephonic benefits counselor, use it — but still verify the tool's assumptions against the SBC. Tools sometimes use last year's premiums or omit employer HSA seeds.

Cash-flow and investing inside the HSA matter as much as the plan pick. If you choose the HDHP, front-load contributions early in the year so the balance can cover an early claim. Many payroll systems let you set a high per-paycheck deferral and lower it later. Keep a small cash buffer in ordinary savings for January if the HSA starts empty. After you have roughly one deductible in HSA cash, ask whether your custodian allows investing the remainder in low-cost funds — that is how the account becomes a retirement-medical asset, not only a current-year parking spot.

Couples with two employer plans should model four combinations (A only, B only, both self-only, one family). The cheapest legal combo sometimes puts each adult on a different employer's self-only plan — but a spouse's family coverage that includes you can block HSA eligibility even if you personally enroll in an HDHP. Confirm whose plan covers whom before you chase the HSA.

If you are tempted to decline employer coverage and buy a Marketplace plan instead, pause. An affordable employer offer (under IRS affordability rules based largely on the employee self-only premium versus household income) usually blocks Marketplace premium tax credits. Guessing wrong can mean full-price 2027 premiums. HealthCare.gov open enrollment still starts November 1 for people who qualify.

FAQ

Can I have an HSA with a PPO?
No. HSAs require coverage under an HSA-eligible HDHP and no disqualifying other coverage (a non-limited-purpose FSA, Medicare enrollment, and certain other coverage can block eligibility for a given month).

Do employer HSA contributions count toward the $4,500 / $9,000 limits?
Yes. Employee + employer combined cannot exceed the annual limit (plus the age-55 catch-up on the employee's side).

What if I switch mid-year after a qualifying life event?
HSA contribution limits are pro-rated by months of eligibility, with a last-month rule that can let you contribute the full annual amount if you are eligible on December 1 and stay eligible through the following year — complex enough that you should read IRS Publication 969 or ask a tax professional before maxing after a mid-year change.

Is the HDHP out-of-pocket max the same as the ACA $12,000 cap?
No. For 2027, an HSA-eligible HDHP cannot exceed $8,700 self-only / $17,400 family in out-of-pocket spending (IRS). Separately, ACA-compliant plans generally cannot exceed $12,000 / $24,000 (HHS). Employer HDHPs must satisfy the tighter IRS caps to remain HSA-eligible.

Should I auto-enroll in the same plan as 2026?
Only after you re-run the five-number test. Premiums, deductibles, formularies, and HSA seeds change yearly even when the plan nickname stays the same.

Sources

• IRS Revenue Procedure 2026-24 (2027 HSA/HDHP limits): irs.gov/pub/irs-drop/rp-26-24.pdf
• IRS Revenue Procedure 2025-19 (2026 HSA/HDHP limits): irs.gov/pub/irs-drop/rp-25-19.pdf
• CMS/HHS 2027 payment parameters guidance (ACA OOP max $12,000 / $24,000): cms.gov/.../2027-papi-parameters-guidance-2026-01-29.pdf
• HealthCare.gov open enrollment dates for 2027 coverage: healthcare.gov/quick-guide/dates-and-deadlines
• IRS Publication 969 (HSAs and other tax-favored health plans): irs.gov/publications/p969
• IRS 2026 retirement plan limits (IR-2025-111 / Notice 2025-67): irs.gov newsroom
• Medicare Annual Enrollment Period overview: medicare.gov/health-drug-plans/open-enrollment

This article is for general education about U.S. employer benefits and tax-favored health accounts. It is not financial, tax, legal, or insurance advice. Dollar Lane is not a fiduciary. Verify all elections with your HR/benefits materials and a qualified professional.