Deductible vs Premium Calculator
Two plans & expected claims
Your result will appear here
Fill in the fields on the left and this updates as you type.
Know what this estimate is based on
- Jurisdiction
- United States — state-regulated insurance
- Scope and limitations
- Educational estimate only. Insurance in the U.S. is regulated state by state, so rates, required coverages and available discounts differ by where you live. Your premium is set by an insurer's own underwriting — driving record, claims history, credit-based insurance score where permitted, the property itself — and only a quote is binding. What a policy pays depends on its exclusions and limits, not on this estimate.
- Source links checked
- Jul 30, 2026
Built and regression-tested by Smart Tools Lab. It has not been individually reviewed by a licensed financial, tax, or legal professional.
How to use
- 01
Enter Plan A's monthly premium and its deductible — typically the plan with the higher premium and lower deductible.
- 02
Enter Plan B's monthly premium and its deductible — usually the cheaper-premium, higher-deductible option you are weighing it against.
- 03
Set the medical costs you realistically expect this year so each plan is priced at the same level of claims.
- 04
Read the cheaper plan and the margin, then use the cost-by-claims table and the break-even figure to see how the answer would change if your spending turned out higher or lower; all five inputs sit in the main panel, with no advanced options to open.
Formula
Each plan's total cost for the year is its premium paid every month plus the claims you actually pay out of pocket, which stop once you hit that plan's deductible: cost = monthlyPremium x 12 + min(expectedClaims, deductible). The min term is the whole trade-off in one expression — until your claims reach the deductible you pay them in full, and beyond it the plan covers the rest, so a higher deductible only bites if you spend enough to reach it. The calculator runs this for Plan A and Plan B at your expected level of claims, names the cheaper one, and reports the margin between them as the headline. It also finds the break-even level of claims where the two plans cost the same. That point only exists in the band between the two deductibles, where the lower-deductible plan has already capped its out-of-pocket while the higher-deductible plan is still climbing: breakEvenClaims = 12 x (lowerDeductiblePremium - higherDeductiblePremium) + lowerDeductible, reported only when it lands between the two deductibles. Below the break-even the plan with the cheaper premium wins; above it the plan with the lower deductible wins. All five inputs are standard — there are no advanced options to expand — and there is no growth chart, because the horizontal axis here is the amount of claims, not the passage of time.
Example
Take the default comparison. Plan A charges 15,000 a month with a 30,000 deductible; Plan B charges 9,000 a month with a 120,000 deductible; and you expect 50,000 of medical claims this year. Plan A's premiums cost 15,000 x 12 = 180,000, and because your expected 50,000 of claims exceeds its 30,000 deductible you pay only that 30,000 out of pocket, for a total of 180,000 + 30,000 = 210,000. Plan B's premiums cost 9,000 x 12 = 108,000, and since your 50,000 of claims falls below its 120,000 deductible you pay the full 50,000 yourself, for a total of 108,000 + 50,000 = 158,000. Comparing the two, Plan B is cheaper by 210,000 - 158,000 = 52,000. The break-even check: the lower-deductible plan is A, so breakEvenClaims = 12 x (15,000 - 9,000) + 30,000 = 72,000 + 30,000 = 102,000, which sits neatly between the 30,000 and 120,000 deductibles. So below 102,000 of annual claims Plan B (the cheaper premium) wins, and above 102,000 Plan A (the lower deductible) wins. At your expected 50,000 of claims you are well below that line, which is exactly why Plan B comes out 52,000 ahead this year.
Definitions
- Plan A monthly premium
- The fixed amount Plan A charges every month regardless of whether you claim, multiplied by twelve to get its annual premium cost (0 to 1,000,000).
- Plan A deductible
- The most you pay out of pocket on Plan A before it starts covering claims; once your claims reach this figure your spending on it stops (0 to 10,000,000).
- Plan B monthly premium
- The fixed monthly charge for Plan B, again taken twelve times for the year; here it is lower than Plan A's, the usual reward for accepting more deductible (0 to 1,000,000).
- Plan B deductible
- The out-of-pocket ceiling for Plan B before cover kicks in; a higher figure than Plan A's means cheaper premiums but more exposure on a heavy-claim year (0 to 10,000,000).
- Expected medical costs
- Your best estimate of the claims you will incur this year — the single number that decides which deductible actually gets reached and therefore which plan is cheaper (0 to 10,000,000).
- Cheaper plan and margin
- The headline result: which of the two plans costs less at your expected claims, and by how much, found by subtracting the smaller annual cost from the larger.
Good to know
The trade-off every plan choice comes down to
Each of the two plans you are weighing is a fixed offer: its monthly premium and its deductible are printed on the policy and will not move. What is not fixed is the one quantity that decides everything — how much care you will actually use. So the comparison is really an exercise in pricing two settled contracts against a single unknown, and the job of this calculator is to collapse each contract into one annual number at a chosen level of claims so the two can be subtracted cleanly instead of guessed at. Reduced that way, the choice stops being about premiums or deductibles in isolation and becomes a bet on which kind of year you are about to have. Pick the cheaper-premium plan and you are betting on a quiet year, pocketing the premium saving but exposing yourself across a wide span of claims before its cover engages. Pick the lower-deductible plan and you are paying more up front to buy a hard limit on how bad a heavy year can get. The break-even crossover, which the next section pins down precisely, tells you where the bet flips — but that single threshold is not the verdict on its own. Here is the principle the rest of the page operationalises: the right plan is not automatically the one that comes out cheaper at your expected figure. That figure is the most likely single outcome, not the only one, so a sound choice weighs a likely quiet year against a less likely but costly one rather than treating the expected case as a certainty. The number on the screen ranks the plans for a typical year; what you do about the years that are not typical is the decision the calculator hands back to you.
How the annual cost of a plan is built
The formula the calculator uses is deliberately transparent: a plan's yearly cost is its monthly premium times twelve, plus whichever is smaller of your expected claims or that plan's deductible. The premium part is straightforward — a recurring charge you cannot avoid. The clever part is the min function on the claims. Below the deductible, every unit of medical spending comes straight out of your pocket, so your out-of-pocket cost rises one-for-one with your claims. The moment your claims reach the deductible, that part of the cost stops growing, because the insurer now picks up everything beyond it. That is why the term is written as min(claims, deductible): it is the amount of claims you personally absorb before cover takes over, and it can never exceed the deductible no matter how large the medical bills get. This structure explains the entire shape of the comparison. A plan with a small deductible caps your exposure quickly, so even a catastrophic year costs you little beyond the premiums. A plan with a large deductible leaves you exposed across a much wider range of claims before its cover engages. Adding the premium back in gives the total you would hand over for the year under each plan. Run the same expected-claims figure through both plans and you have an apples-to-apples number for each, ready to subtract. Because the relationship is piecewise — rising with claims, then flat — the cheaper plan can switch as expected claims grow, which is precisely what the break-even calculation pins down.
Reading the break-even level of claims
The single most useful output beyond the winner is the break-even level of claims: the amount of annual spending at which the two plans cost exactly the same. It exists because of the piecewise shape just described. Imagine claims starting at zero and climbing. At first, both plans are paying claims dollar-for-dollar, so the gap between them is just the difference in premiums — the cheaper-premium plan leads. As claims rise past the lower deductible, that plan's out-of-pocket flattens while the other plan keeps absorbing claims, so the higher-deductible plan's cost keeps climbing and the gap narrows. Somewhere in the band between the two deductibles the lines cross. The formula is breakEvenClaims = 12 x (lower-deductible premium − higher-deductible premium) + lower deductible. It only produces a meaningful answer when that crossing point lands between the two deductibles; if one plan is cheaper at every conceivable level of claims, there is no break-even and the calculator says so. The practical value is that it turns the decision into a threshold you can judge against your own expectations. If you are confident your claims will stay well below the break-even, the cheaper-premium plan is the safe pick. If you expect to blow past it — a planned surgery, a chronic condition, a baby on the way — the lower-deductible plan wins. And if your honest estimate sits close to the line, the choice is nearly a wash, and tie-breakers such as provider networks, drug formularies or an HSA become the deciding factors rather than raw cost.
Using the cost-by-claims table to stress-test the answer
A single expected-claims figure gives one verdict, but real medical spending is unpredictable, so the calculator also lays out a small table of each plan's cost at several levels of claims: zero, each plan's deductible, your expected figure, and one and a half times the larger deductible to represent a bad year. Reading down the table is the fastest way to understand how robust your decision is. If the same plan is cheaper in every row, your choice is dominant — it holds whether the year is quiet or disastrous, and you can stop worrying about your estimate. More often the cheaper column flips partway down: one plan wins the early, low-claim rows and the other wins the later, high-claim rows, with the switch happening at the break-even level. That flip is the visual signature of a genuine trade-off, and it tells you exactly which way the risk runs. The zero-claims row is worth special attention because it isolates the pure premium cost — what you pay just to hold the plan in a year you never use it. The high-claims row at the bottom shows your worst-case exposure, the figure that matters most if you are risk-averse or have a known condition. Comparing those two extremes frames the real question: are you willing to risk the larger bad-year cost in exchange for cheaper premiums in a likely-quiet year? The table does not answer that for you, but it makes the size of the gamble explicit instead of hidden inside a single headline number, which is exactly what a careful buyer needs before committing for twelve months.
Why a high deductible can still be the cheaper plan
It is tempting to recoil from a large deductible, but the arithmetic frequently favours it for people who use little care. Consider that the premium saving on a high-deductible plan is banked every single month, guaranteed, while the deductible only costs you anything if you actually claim — and even then only up to its ceiling. Over a typical quiet year, many households never come close to a large deductible, so they keep the full premium saving and pay only modest out-of-pocket costs. The plan effectively pays you to take on a risk that, statistically, often does not materialise. There is also a powerful structural sweetener: high-deductible health plans commonly qualify you to open a Health Savings Account. Money paid into an HSA is tax-advantaged going in, grows without tax, and can be spent tax-free on medical costs, with any unused balance rolling forward indefinitely and eventually serving as retirement savings. Those tax benefits are real money that this calculator's pure cost comparison does not capture, so a plan that loses here by a small margin can become the genuine winner once the HSA is counted. The catch is discipline and cash flow: a high deductible only works if you could actually find that money in a bad year without going into debt, and ideally if you funnel the premium savings into the HSA rather than spending them. For a financially stable household with an emergency fund, the high-deductible route is often the quietly smart choice; for someone living paycheque to paycheque, the certainty of a low deductible can be worth its higher premium even when the spreadsheet disagrees.
Beyond the model: what the simple formula leaves out
This calculator models a clean two-part plan — you pay claims up to the deductible, the insurer covers everything after — and that clarity is its strength, but real policies add wrinkles worth knowing before you commit. Many plans charge coinsurance, a percentage of costs you keep paying even above the deductible, until you finally hit a separate maximum out-of-pocket; in that world the true ceiling on your spending is the max out-of-pocket, not the deductible, so entering that maximum as the deductible here gives a more honest comparison. Copays for visits and prescriptions sit outside the deductible on some plans and inside it on others, nudging your real out-of-pocket either way. Provider networks matter too: a cheaper plan with a narrow network can cost far more if it forces you out-of-network for the specialist you actually need, and drug formularies can make or break the year for anyone on regular medication. None of these subtleties changes the core logic the tool teaches — premiums are certain, claims are capped by a ceiling, and the cheaper plan depends on where your spending lands relative to that ceiling. They simply mean the deductible you type in should represent your genuine worst-case out-of-pocket rather than the headline deductible printed in bold. Treat the result as a rigorous first cut that ranks two plans on cost alone, then layer in the qualitative factors — network breadth, prescription coverage, the HSA option and your own appetite for risk — before signing. The calculator hands you a defensible number; the final decision is that number weighed against the parts of a policy no single formula can price.
Frequently asked questions
Why does the cheaper-premium plan not always win?
A low premium only saves money in a light-claim year. Once your claims climb toward the higher plan's deductible, you pay more out of pocket on it, and beyond the break-even level that extra exposure outweighs the premium saving. The calculator reflects this by adding min(claims, deductible) to each plan's premiums, so the winner depends entirely on how much you actually spend.
What is the break-even level of claims?
It is the amount of annual claims at which both plans cost exactly the same. Below it the plan with the cheaper premium is the better buy, and above it the plan with the lower deductible takes over. The tool computes it as 12 x (lower-deductible premium minus higher-deductible premium) plus the lower deductible, and only shows it when that figure falls between the two deductibles.
Should I use the maximum out-of-pocket instead of the deductible?
This calculator models a simple two-part plan where you pay claims up to the deductible and the insurer covers everything after, so the deductible doubles as the out-of-pocket cap. Real policies often add coinsurance and a separate maximum out-of-pocket above the deductible. If yours does, enter that maximum as the deductible to capture the true ceiling on your spending.
How do I pick a realistic expected-claims figure?
What matters most for a comparison is not just the number but how confident you are in it. If your claims are predictable — a stable, well-understood pattern of care — you can trust the expected figure to land you on the correct side of the break-even, so lean into whichever plan it names, and if that is the cheaper-premium plan, take the saving. If your claims are genuinely uncertain and could swing high, treat the estimate as a guess rather than a forecast: the more doubt you have, the more you should tilt toward the lower-deductible plan, which caps your exposure if the year turns out worse than you assumed. The cost-by-claims table is built for exactly this judgement, showing each plan's cost across a span of spending levels so you can see how far your real claims would have to drift before the cheaper plan changes.
Why does the higher-deductible plan note an HSA?
High-deductible health plans frequently qualify you to fund a Health Savings Account, where contributions are tax-advantaged and the balance rolls over year to year. Those tax savings reduce the real cost of choosing the higher-deductible plan, so a plan that looks marginally more expensive here can become the cheaper choice once the HSA benefit is counted.
Does the comparison only apply to health insurance?
No — the same premium-versus-deductible trade-off drives auto, home and many other policies. Any time you can pay a higher premium to lower a deductible, or vice versa, you can drop the two options into Plan A and Plan B and use your expected level of claims to see which is cheaper over a year.