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Which health plan costs me least over a year, and what is its worst case?
Enter each plan's premium and cost-sharing and how much care you expect to use. The lab adds up premiums and what you pay, subtracts the HSA or FSA tax savings, and shows a worst case. The values shown are samples.
Some states, such as California, tax HSA money. Enter 0 if unsure.
Payroll deductions also skip the 7.65% Social Security and Medicare tax.
2026 limit: $3,400.
2026 limit, yours plus your employer's: $4,400.
$3,164
This week: find the deductible and out-of-pocket maximum on each plan's summary of benefits.
| Item | Plan A | Plan B |
|---|---|---|
| Premiums for the year | $3,600 | $1,800 |
| You pay for care | $1,200 | $2,160 |
| Employer HSA money | $0 | -$500 |
| HSA or FSA tax savings | $0 | -$297 |
| Expected cost | $4,800 | $3,164 |
| Worst case | $7,600 | $5,504 |
The worst case is a year when you reach each plan's out-of-pocket maximum. Plan B has the lowest worst case. An HSA contribution also saves 30% of each dollar at the rates you entered.
Educational estimate for tax year 2026. What it simplifies: one coinsurance rate after the deductible and no copays, in-network care only, one year with no carryover, premiums treated the same on every plan, and employer and HSA deposits counted as yours in full. The low, medium and high amounts are round samples, not averages. Limits used: HSA $4,400 self-only or $8,750 family (employer money counts), a high-deductible plan has a deductible of at least $1,700 or $3,400 and an out-of-pocket maximum of at most $8,500 or $17,000, and a health FSA is limited to $3,400. A general-purpose health FSA cannot be combined with an HSA. IRS rev. proc. 2025-19 · IRS rev. proc. 2025-32 · IRS publication 969 · HealthCare.gov: out-of-pocket maximum
Plan A has a $300 monthly premium, a $500 deductible, 20% coinsurance, and a $4,000 maximum. Premiums are $3,600. Care of $4,000 costs you $500 plus 20% of $3,500, or $1,200, so the year is $4,800 and the worst case is $7,600. Plan B has a $150 premium, a $1,700 deductible, 20% coinsurance, a $4,500 maximum, and $500 from the employer into an HSA. Premiums are $1,800. Care costs you $1,700 plus 20% of $2,300, or $2,160. You add $1,000 of your own to the HSA, which at a 22% federal rate plus 7.65% saves $296.50. The year is $1,800 plus $2,160 minus $500 minus $296.50, or $3,163.50, and the worst case is $5,503.50.
Finance Quest is educational. It is not financial advice, and no calculator here knows your full situation.
The lower premium in the example is $150 a month, but the cheaper year depends on use. At $500 of care the HSA plan costs $1,503.50 against $4,100, and at $15,000 of care it costs $5,363.50 against $7,000. A plan with a lower premium and a higher deductible can still win, but the worst case is the check a family has to be able to write. The lab shows both.
$4,400 for self-only coverage and $8,750 for family coverage, counting what your employer puts in. People 55 and older can add $1,000. The IRS sets the limits in Rev. Proc. 2025-19.
For 2026 the deductible is at least $1,700 for self-only or $3,400 for family, and the out-of-pocket maximum is at most $8,500 or $17,000. A plan outside those numbers does not allow HSA contributions, and other coverage can also affect eligibility.
Not a general-purpose health FSA. A limited-purpose FSA that covers dental and vision, or care after the deductible, can be used with an HSA. The 2026 health FSA limit is $3,400, with up to $680 of carryover if the plan allows it.
It is the year's premiums plus the out-of-pocket maximum, less employer HSA money and tax savings. It is the most the plan can cost you for in-network covered care in a bad year.