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Deductible vs Premium Tradeoff Calculator

Prices a high-deductible health plan against a low-deductible one over the same year of care, crediting the high-deductible side with all three of its advantages: the lower premium, the employer contribution into a health savings account, and the tax saved on your own contribution. It reports which plan costs less at the care you expect, the billed spend at which the two would cost the same, and the most a single year can cost under each.

Last updated

Calculator overview

Inputs and outputs

This summary comes from the calculator's published input and output contract.

Inputs

Low Premium (required)
About this input

Your own share of the premium on the low-deductible plan for a whole year. The gap between this and the other premium is what the lower deductible costs you up front, and it is usually far smaller than people expect: on the average pair it is about a hundred dollars a year.

Unit $/year Default 1440 Range 0 to 25000
Low OOP Max (required)
About this input

The most the low-deductible plan can leave you paying for covered care in a year. The survey this workbook takes its other defaults from publishes no average for this figure, so the value it opens with is a convention of this workbook rather than a measured one. Replace it from the plan summary.

Unit $/year Default 4000 Range 0 to 17000
Low Deductible (required)
About this input

What you pay for care on the low-deductible plan before it starts sharing the cost. The gap between the two deductibles is what you are buying with the extra premium, and the whole comparison turns on whether that gap is larger than the premium gap plus whatever the account is worth.

Unit $/year Default 1337 Range 0 to 17000
Marginal Rate (required)
About this input

The federal income tax rate on your next dollar of income, which is the rate a contribution into the account is saved at. It is not your average rate, which is lower. If you do not know it, the marginal versus effective tax rate calculator in this cluster works it out from your income and filing status.

Unit fraction Default 0.22 Range 0 to 0.37
Through Payroll (required)
About this input

Whether the contribution is taken from your pay under a cafeteria plan. Money contributed that way escapes Social Security and Medicare tax as well as income tax, which is worth about seven and a half percent more. A contribution you make directly to the account is deducted on your return and does not escape payroll tax, and that is what No means here.

Default Yes Allowed Yes, No
State Rate
When omitted Blank
About this input

Optional. Your state income tax rate, if your state taxes income and recognises the account. Leave it blank for a state with no income tax, and for the two states that tax these contributions anyway. It is a flat stand-in for a schedule of brackets, so it is an approximation even where it applies.

Unit fraction Default Not set Range 0 to 0.133
Own HSA Contribution
When omitted Blank
About this input

Optional. What you put into the account yourself over the year. Leave it blank to compare the two plans on premiums and care alone. Only the tax saved on it counts here, never the contribution itself, because the money is still yours: it is saved rather than spent. The annual limit covers your employer contribution as well as yours, so the most you may add is the limit less whatever your employer puts in, and the status line warns when the two together go past it. Nothing is trimmed: an excess is priced as entered and the warning explains that it would not be deductible.

Unit $/year Default Not set Range 0 to 9750
Employer HSA
When omitted Blank
About this input

Optional. What your employer pays into the health savings account each year on the high-deductible side. Leave it blank if there is none, which is the case for about one in seven people offered one of these plans. It is subtracted from the high-deductible plan cost in full, because it is money you have only because you chose that plan. It also counts against the same annual contribution limit you do, so it reduces the most you may add yourself, and the status line warns when the two together go past the limit.

Unit $/year Default Not set Range 0 to 8750
Coverage (required)
About this input

Whether the plan covers you alone or a family. It selects the statutory minimum deductible, the statutory out-of-pocket ceiling and the annual account contribution limit, all three from the same row of the table, and it changes nothing else in the arithmetic.

Default Self-only Allowed Self-only, Family
Coinsurance (required)
About this input

Your share of the bill after the deductible is met and before the out-of-pocket maximum is reached, as a percentage. Twenty percent is the usual figure for a hospital admission. It is applied to both plans here, because the two are typically written on the same schedule; where they differ, the plan you care most about is the one to enter.

Unit fraction Default 0.2 Range 0 to 0.5
Expected Annual Spend (required)
About this input

What you expect providers to BILL the plan for your care over the year, before any discount for your share. It is not what you expect to pay yourself, and entering that instead is the commonest mistake made with a calculator of this kind. Nobody knows this figure in advance: about a twentieth of people account for half of all health spending and about a seventh spend nothing at all, so read the grid and the cost curve rather than trusting one number.

Unit $/year Default 3000 Range 0 to 50000
High Premium (required)
About this input

Your own share of the premium on the high-deductible plan for a whole year, not the total premium and not the amount per pay period. Your employer usually pays most of the total, and using the total instead of your share reverses the answer for most people. Multiply the amount taken from your pay by the number of pay periods in the year.

Unit $/year Default 1319 Range 0 to 25000
High OOP Max (required)
About this input

The most the high-deductible plan can leave you paying for covered care in a year. Once your share reaches it the plan pays everything else, and the premium is on top. The average plan of this kind sets it at little more than half the statutory ceiling, so read it off the plan summary rather than assuming the legal maximum.

Unit $/year Default 4509 Range 0 to 17000
High Deductible (required)
About this input

What you pay for care on the high-deductible plan before the plan starts sharing the cost. It is also the axis across the top of the grid at the foot, so the grid shows what a different deductible would be worth to you. For the plan to come with a health savings account this has to be at or above the statutory minimum for your coverage.

Unit $/year Default 2578 Range 0 to 17000

Outputs

Premium Difference
About this output

How much more of the premium the low-deductible plan asks you to pay over the year. This is the first of the three things the high-deductible plan has going for it, and on the average pair of plans it is the smallest of them.

Unit $/year
Table1 Tradeoff Column Axis
About this output

The values across the top of the grid: the deductible on the high-deductible plan, in steps of two hundred and fifty either side of yours and never below nothing. Read a column to hold the deductible fixed and vary the care. The middle entry is your own figure.

No unit declared
Model Status
About this output

Reads OK, or explains why the figures entered do not describe a comparison this model can make, or why the answer deserves a second look.

No unit declared
Low Plan Cost
About this output

What a year on the low-deductible plan costs you in total: your share of the premium plus everything the plan leaves you paying for the care you entered. No account money is credited on this side, because a low-deductible plan does not come with one.

Unit $/year
Low Worst Year
About this output

The most a single year on the low-deductible plan can cost you: your share of the premium plus the out-of-pocket maximum. It is what you are exposed to if the year goes badly, and it is the figure to compare against savings you could reach in a hurry.

Unit $/year
Table1 Tradeoff Row Input
About this output

Machinery, and NOT an input. Excel substitutes each value from the row axis into this cell while it fills the grid; the rest of the time it mirrors the billed spend. Change the billed spend above, never this: the axis is derived from it, so editing the mirror moves the axis while the table walks and the grid comes out meaningless.

Unit currency/yr
Table1 Tradeoff Values
About this output

The body of the grid: the low-deductible plan cost for the year less the high-deductible plan cost, recomputed for every combination of the two axes. One hundred and twenty-one cells, each one the whole calculation run again. It is a component of the table rather than a result on its own.

Unit currency/yr
Table1 Tradeoff Row Axis
About this output

The values down the left of the grid: the billed medical spend for the year, in steps of five hundred either side of yours and never below nothing. Read a row to hold the amount of care fixed and vary the deductible. The middle entry is your own figure.

No unit declared
Table1 Tradeoff Column Input
About this output

Machinery, and NOT an input. The same for the column axis: Excel substitutes into it while filling the grid, and the rest of the time it mirrors the deductible on the high-deductible plan.

Unit currency/yr
Table1 Tradeoff Corner
About this output

Machinery. Excel requires the formula being tabulated to sit in the top-left corner of the grid, where it means nothing to a reader, so it is formatted away. It holds the difference between the two plan costs.

Unit currency/yr
Difference
About this output

The low-deductible plan cost for the year less the high-deductible plan cost. A positive figure means the high-deductible plan is cheaper by that much at the care you entered, and a negative one means the low-deductible plan is. It is also what the grid at the foot tabulates, so the grid shows how that answer moves with the care you need and with the deductible.

Unit $/year
High Member Share
About this output

What the high-deductible plan leaves you paying for care over the year, with the premium excluded and before the account money is credited. Comparing it with the same figure for the other plan shows what the higher deductible actually costs in a year like the one you entered, rather than what the deductible gap suggests.

Unit $/year
Cheaper Plan
About this output

Which plan costs less at the care you entered, in words. Two costs within half a cent of each other are reported as the same, because money is billed in cents. It answers only for the spend you entered; the break-even below is what tells you how far that answer holds.

No unit declared
Break Even Note
About this output

What the break-even figure means for this pair of plans: either that the two meet at the spend shown, or that one of them is cheaper at every spend and no crossing exists. The second case is common with a real employer contribution.

No unit declared
Break Even Spend
About this output

The billed spend at which the two plans cost exactly the same. Below it one plan wins and above it the other does. It reads zero when there is no such spend, which happens more often than the usual rule of thumb suggests, and the note beside it says which plan wins in that case. It is found exactly rather than searched for, because both plan costs are straight lines between the few points where they bend.

Unit $/year
HSA Tax Saving
About this output

The tax you do not pay because your contribution went into the account: the contribution multiplied by your marginal federal rate plus your state rate plus, where it is routed through payroll, the payroll rate. It is a saving on money you were going to save anyway, so treat it as a discount on the high-deductible plan rather than as income.

Unit $/year
Low Member Share
About this output

What the low-deductible plan leaves you paying for care over the year, with the premium excluded: the deductible up to what is billed, plus your coinsurance share of the rest, capped at the out-of-pocket maximum.

Unit $/year
HSA Qualified
About this output

Whether the high-deductible plan as entered sits inside the statutory limits for its coverage, which is what a plan has to do before a health savings account can be opened alongside it. When it reads No the employer money and the tax saving would not be available, the status line says so, and the comparison above still shows them so you can see what is being given up.

No unit declared
High Plan Cost
About this output

What a year on the high-deductible plan costs you in total: your share of the premium, plus what you pay for care, less the employer contribution into the account and less the tax saved on your own contribution. All three of those subtractions are advantages of choosing this plan, and leaving any of them out is what makes most comparisons favour the low-deductible plan.

Unit $/year
High Worst Year
About this output

The most a single year on the high-deductible plan can cost you: your share of the premium plus the out-of-pocket maximum, less the employer contribution and the tax saving. The gap between the two worst years is usually far smaller than the gap between the two deductibles, which is the point most often missed in this decision.

Unit $/year
This page is provided by LogicCommons for informational purposes only. Results are model outputs computed from the inputs you supply and are not financial, investment, tax, accounting, or legal advice, and no advisory relationship is created. Verify all inputs and results independently before relying on them in any decision.

LogicCommons is in beta. If a result, label, or reference looks wrong, tell us here; we read every message.

Methodology

Purpose and model boundary

Use this to weigh a high-deductible health plan against a low-deductible one over the same year of care. The high-deductible side is credited with all three of its advantages: the lower premium, the employer contribution into a health savings account, and the tax saved on your own contribution. Leaving any of the three out is what makes most comparisons favour the low-deductible plan.

It reports which plan costs less at the care you expect, the billed spend at which the two would cost the same, and the most a single year can cost under each.

It prices COVERED, in-network care only. Copays, out-of-network care, balance billing and anything the plan does not cover are outside it, and so is the value of the network itself, the drug formulary, and how either plan treats a condition you already have.

Inputs and units

Input Unit Accepted range What it means
Low Premium $/year 0 through 25,000 YOUR share of the premium on the low-deductible plan for a whole year, not the total premium and not the amount per pay period. Multiply what is taken from your pay by the number of pay periods.
Low Deductible $/year 0 through 17,000 What you pay for care on the low-deductible plan before it starts sharing the cost.
Low OOP Max $/year 0 through 17,000 The most the low-deductible plan can leave you paying for covered care in a year. Read it off the plan summary; the figure this opens with is a convention rather than a measured average.
High Premium $/year 0 through 25,000 Your share of the premium on the high-deductible plan for a whole year. Your employer usually pays most of the total, and using the total instead of your share reverses the answer for most people.
High Deductible $/year 0 through 17,000 What you pay for care on the high-deductible plan before the plan starts sharing. For the plan to come with a health savings account, this has to be at or above the statutory minimum for your coverage.
High OOP Max $/year 0 through 17,000 The most the high-deductible plan can leave you paying for covered care in a year. The average plan of this kind sets it well below the statutory ceiling, so read it off the plan summary rather than assuming the legal maximum.
Coverage list Self-only, family Whether the plan covers you alone or a family. It selects the statutory minimum deductible, the statutory out-of-pocket ceiling and the annual account contribution limit, and changes nothing else.
Coinsurance % 0% through 50% Your share of the bill after the deductible is met and before the out-of-pocket maximum is reached. It is applied to both plans, because the two are typically written on the same schedule.
Expected Annual Spend $/year 0 through 50,000 What you expect providers to BILL the plan for your care over the year, before any discount for your share. It is not what you expect to pay yourself, and entering that instead is the commonest mistake made with a calculator of this kind.
Own HSA Contribution $/year 0 through 9,750 Optional. What you put into the account yourself over the year. Only the tax saved on it counts here, never the contribution itself, because the money is still yours: it is saved rather than spent.
Employer HSA $/year 0 through 8,750 Optional. What your employer pays into the account each year on the high-deductible side. It is taken off the high-deductible plan cost in full, because it is money you have only because you chose that plan.
Through Payroll list Yes, No Whether the contribution is taken from your pay under a workplace plan. Money contributed that way escapes Social Security and Medicare tax as well as income tax. A contribution made directly to the account is deducted on your return and does not escape payroll tax.
Marginal Rate % 0% through 37% The federal income tax rate on your next dollar of income, which is the rate a contribution into the account is saved at. It is not your average rate, which is lower.
State Rate % 0% through 13.3% Optional. Your state income tax rate, if your state taxes income and recognises the account. It is a flat stand-in for a schedule of brackets, so it is an approximation even where it applies.

Governing relationships

Each plan's cost for the year is your share of its premium plus what it leaves you paying for the care billed.

What a plan leaves you paying is built in three stages. Up to the deductible you pay the whole bill. Above the deductible you pay your coinsurance share of the rest. And the total of those two is capped at the out-of-pocket maximum, after which the plan pays everything. That is why each plan's cost line bends twice and is flat after the second bend.

On the high-deductible side two further amounts are subtracted. The employer contribution into the account comes off in full, because it is money you have only because you chose that plan. The tax saved on your own contribution comes off as well: the contribution multiplied by your federal marginal rate, plus your state rate, plus the payroll rate where the money is routed through payroll. The contribution itself is never subtracted, because it is saved rather than spent.

The difference between the two plan costs is the answer at the care you entered. Because both cost lines are straight between the few points where they bend, the billed spend at which they meet can be found exactly rather than searched for. Sometimes there is no such spend at all, because one plan is cheaper at every level of care, and that is reported rather than approximated.

The worst a year can do under each plan is its premium plus its out-of-pocket maximum, with the account money and the tax saving taken off on the high-deductible side.

Calculation sequence

This is the order in which the reported figures depend on one another. It is not a claim about the order in which the model evaluates itself.

  1. Read the statutory minimum deductible, out-of-pocket ceiling and annual contribution limit for the coverage chosen, and decide whether the high-deductible plan as entered qualifies for an account.
  2. Work out what each plan leaves you paying at the billed spend entered: the deductible, then the coinsurance share, then the cap.
  3. Add your share of each premium to get each plan's cost before any account money.
  4. Work out the tax saved on your own contribution at the federal, state and, where it applies, payroll rates.
  5. Take the employer contribution and that tax saving off the high-deductible plan cost.
  6. Subtract one plan cost from the other to get the difference, and name the cheaper plan.
  7. Solve the two cost lines for the billed spend at which they are equal, or report that no such spend exists.
  8. Add each premium to each out-of-pocket maximum, with the account money and tax saving taken off on the high-deductible side, to get the worst a year can do.
  9. Rerun the whole comparison across a grid of billed spends and deductibles, so the sensitivity to each is visible rather than asserted.

Outputs and interpretation

Output Role Unit What it means
Cheaper Plan primary text Which plan costs less at the care you entered, in words. Two costs within half a cent of each other are reported as the same. It answers only for the spend you entered; the break-even below is what tells you how far that answer holds.
Difference primary $/year The low-deductible plan cost less the high-deductible plan cost. Positive means the high-deductible plan is cheaper by that much at the care you entered.
Break Even Spend primary $/year The billed spend at which the two plans cost exactly the same. Below it one plan wins and above it the other does. It reads nothing when there is no such spend, which happens more often than the usual rule of thumb suggests.
Break Even Note detail text What the break-even figure means for this pair of plans: either that the two meet at the spend shown, or that one of them is cheaper at every spend and no crossing exists. The second case is common with a real employer contribution.
Low Plan Cost detail $/year What a year on the low-deductible plan costs you in total. No account money is credited on this side, because a low-deductible plan does not come with one.
High Plan Cost detail $/year What a year on the high-deductible plan costs you in total, after the employer contribution and the tax saving are taken off.
Low Member Share detail $/year What the low-deductible plan leaves you paying for care over the year, premium excluded.
High Member Share detail $/year What the high-deductible plan leaves you paying for care over the year, premium excluded and before the account money is credited. Setting the two side by side shows what the higher deductible actually costs in a year like the one you entered, rather than what the deductible gap suggests.
Premium Difference detail $/year How much more of the premium the low-deductible plan asks you to pay over the year. On a typical pair it is the smallest of the high-deductible plan's three advantages.
HSA Tax Saving detail $/year The tax you do not pay because your contribution went into the account. It is a saving on money you were going to save anyway, so treat it as a discount on the high-deductible plan rather than as income.
HSA Qualified detail text Whether the high-deductible plan as entered sits inside the statutory limits for its coverage, which is what a plan has to do before an account can be opened alongside it. When it reads No the employer money and the tax saving would not be available, and the comparison still shows them so you can see what is being given up.
Low Worst Year detail $/year The most a single year on the low-deductible plan can cost you. It is the figure to set against savings you could reach in a hurry.
High Worst Year detail $/year The most a single year on the high-deductible plan can cost you, after the account money and the tax saving. The gap between the two worst years is usually far smaller than the gap between the two deductibles, which is the point most often missed in this decision.

Model Status reads OK, or explains why the figures entered do not describe a comparison this model can make, or why the answer deserves a second look. It is shown alongside the results rather than in place of them.

The calculator also returns a grid that reruns the comparison across a range of billed spends and deductibles at once. Its axes, corner and body arrive as separate values and are the grid's parts rather than results to read on their own; the page assembles them into the table.

Every figure above is returned by the model. The page arranges and formats them; it computes none of them.

Validation and status logic

These are the states the delivery's own recorded runs exercise, so the table records what this calculator has been observed to return rather than every branch it could take.

Condition Returned status
A plan has a deductible above its own out-of-pocket maximum NOT VALID: one plan has a deductible above its own out-of-pocket maximum, which no plan does; check the two figures on the plan summary
The two plans are identical in premium, deductible and maximum NOT VALID: the two plans carry the same premium, the same deductible and the same out-of-pocket maximum, so there is no trade-off to weigh
An amount or a rate has been entered as a negative number NOT VALID: every premium, deductible, out-of-pocket maximum, spend and rate has to be zero or more
The high-deductible plan is cheaper nowhere on the range considered CHECK: the high-deductible plan costs more at every spend this model considers, so there is no amount of care that makes it the cheaper choice
The high-deductible plan falls outside the statutory limits for its coverage CHECK: the high-deductible plan is outside the statutory limits for this coverage, so it would not qualify for a health savings account and the two offsets below would not be available
The two contributions together pass the annual account limit CHECK: your own contribution and the employer contribution together are above the annual health savings account limit for this coverage, so the excess would not be deductible
None of the preceding conditions applies OK

Assumptions and limitations

  • Covered, in-network care only. Copays, out-of-network care, balance billing and uncovered services are not modelled, so a year with any of them can cost more than either worst-year figure.
  • One coinsurance percentage for both plans. Where the two really differ, enter the one you care most about and read the answer as a comparison at that schedule.
  • The billed spend is a single figure for the year. Nobody knows it in advance, spending is very unevenly distributed across people, and the cost curve and the grid are there precisely because one number cannot carry the answer.
  • The tax saving is worked out at flat rates you supply. A real return applies a schedule, and a state that does not recognise the account gives nothing.
  • The account contribution itself is never counted as a cost or a benefit, only the tax on it. A contribution above the annual limit is priced as entered and flagged rather than trimmed.
  • Nothing here values the network, the drug list, the providers either plan gives you, or how each treats a condition you already have. Those are often the deciding factors and none of them is a number.

Restrictions and non-computing states

This calculator enforces the numeric limits recorded above before any figure is worked out, so a value outside them is refused rather than answered.

Two refusals are about the shape of the comparison rather than a single value. A deductible above its own out-of-pocket maximum describes a plan nobody writes. And two plans identical in premium, deductible and maximum present no trade-off to weigh, even where employer money would still separate them, so the model refuses rather than reporting a difference that is really an account subsidy.

Errors and warnings

NOT VALID means the figures entered do not describe a comparison this calculator can make, and the results beside it should not be relied on. CHECK is not an error: the arithmetic is sound and the figures stand, but something about the combination is worth knowing first, such as a plan that would not qualify for an account or a contribution above the annual limit. The status is shown with the results rather than in place of them, so a flagged answer is still a readable one.

A value the page itself refuses, because it falls outside the limits above, is rejected before the calculation is requested and no figures are returned at all. That is different again from a transport or service failure, where the page reports that the result could not be fetched rather than showing a stale or partial one.

References

The cap that makes each plan's cost line go flat is the out-of-pocket maximum, and the federal marketplace defines it as "The most you have to pay for covered services in a plan year." It counts "deductibles, copayments, and coinsurance for in-network care and services" towards that limit, and it explicitly does NOT count "Your monthly premiums", "Anything you spend for services your plan doesn't cover", "Out-of-network care and services", or "Costs above the allowed amount for a service that a provider may charge". Once the limit is reached, "Your health plan pays 100% of the costs of covered benefits." Those exclusions are the reason the worst-year figures on this page are a floor on a bad year rather than a ceiling on one. See the HealthCare.gov glossary entry for out-of-pocket maximum.

What makes a plan a high-deductible health plan, and therefore eligible for a health savings account, is a minimum annual deductible and a maximum on the annual out-of-pocket amounts, both set for self-only and family coverage and both adjusted each year. The Internal Revenue Service publishes the pair and the annual contribution limit in the same place, along with the rules this calculator relies on for the tax saving: a contribution is deductible "even if you don't itemize your deductions", "The interest or other earnings on the assets in the account are tax free", and "Distributions may be tax free if you pay qualified medical expenses." See Publication 969, Health Savings Accounts and Other Tax-Favored Health Plans.

Two limits in that publication decide when the offsets on this page would not be available at all. A plan outside the statutory deductible and out-of-pocket range does not qualify for an account, and the annual contribution limit covers your employer's contribution as well as your own, so the two together are what has to fit. Both figures move with the tax year, so check the current ones rather than the ones a calculator opens with.

The figures that decide the answer are on your own plan summary, not in either source: your share of each premium, each deductible, each out-of-pocket maximum, and what your employer actually puts into the account.

These sources provide background; they do not supply the calculator's assumptions or certify its result. This calculator is informational and is not financial, investment, or tax advice. Results follow directly from the two plans and the care you enter, and nothing here values the network, the drug list or the providers either plan gives you.

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