Free Premium Comparison Calculator: calculate premium comparison instantly with transparent formula, worked examples and tips. No signup.
Premium Comparison is a side-by-side estimate of two or three health plans at one expected annual usage level. Premium comparison is not a single-number calculation. A plan with the lowest monthly premium can cost more when a household uses enough care to cross its deductible and pay coinsurance. This page is built as a multi-option comparison: enter two or three plans with their own premium, deductible, coinsurance, and annual copay assumptions, then compare their estimated annual totals under the same usage level.
Choose two or three plans, enter expected annual medical spend, and complete the four fields for each plan. Annual copays are entered as a combined estimate for the expected visits. Keep the usage scenario identical across plans; changing usage for one plan would make the comparison describe different households rather than different benefit designs. For broader household context, see Health Insurance Calculator; the assumptions there are different, so do not combine the two results without checking their time period and scope.
The monthly premium is recurring access cost. The deductible is the first eligible spending boundary. Coinsurance is the patient's percentage of spending above that boundary in this simplified model. Copays are fixed charges represented here by one annual estimate. The out-of-pocket maximum is not included automatically because it needs its own qualifying-cost and plan-rule inputs. The related Copay Cost Calculator page is useful when this distinction affects a household budget, while Deductible Value Calculator covers the next comparison boundary.
Insurance arithmetic is only as reliable as its boundary. Record whether a number is a premium, eligible claim amount, allowed amount, deductible, fixed copay, coinsurance share, limit, or maximum. Keep the policy year and the currency beside the result. A clean record makes it easier to challenge a surprising claim and to repeat a comparison when the policy renews.
Do not enter a billed charge when the plan uses a negotiated or allowed amount unless you deliberately want to model the higher charge. If a field does not match the policy wording, pause and ask the insurer or a qualified adviser rather than forcing a value into the nearest-looking box.
Estimated plan cost = (monthly premium × 12) + min(usage, deductible) + max(0, usage − deductible) × coinsurance rate + annual copays.
At £2,500 expected annual medical spend, Plan A with £240 monthly premium, £1,500 deductible, 20% coinsurance, and £400 copays costs an estimated £4,780. Plan B with £300 premium, £750 deductible, 10% coinsurance, and £600 copays costs £4,800. The small difference shows why all fields matter.
The comparison omits taxes, subsidies, employer contributions, family tiers, negotiated rates, non-covered care, prescriptions, separate pharmacy deductibles, out-of-pocket maximums, and service-specific copays. It assumes the usage amount is eligible and uses one simplified coinsurance rule for every plan. This is why the calculator keeps its inputs visible instead of presenting a single unexplained “insurance cost” number. The output is a transparent scenario that can be audited, not a claim adjudication or a policy quote.
When a policy has more than one cost-sharing stage, calculate in order: identify the covered amount, apply any deductible that remains, apply a fixed copay or percentage where the schedule requires it, then check the relevant limit or maximum. Reversing that order can make a patient share look artificially small or make a coverage limit appear larger than it is.
The lowest displayed estimate is the cheapest under the chosen scenario, not universally the cheapest plan. Change usage to £500, £5,000, and a high-cost year to see where the ranking changes. A household may rationally choose a slightly higher estimate for a broader network, better drug cover, lower volatility, or employer contribution.
Keep a table of the plan documents beside the result. Confirm whether the quoted premium is for the same people and benefit period, whether copays count toward the maximum, and whether the deductible is individual or family. Use the calculator to narrow the options, then read the evidence of coverage.
A result that looks favourable under one scenario can change when usage, renewal pricing, family composition, provider network, or an exclusion changes. Test the variable you are least certain about first. For a comparison, keep the scenario constant across every plan; for a protection decision, compare the likely cash exposure with the amount you could access without selling an asset or missing a bill.
Health-plan selection can affect access to care and household finances. This comparison is educational, not insurance advice, eligibility confirmation, or a guarantee of claim payment. Seek authoritative plan information for a consequential choice.
Health-plan selection can affect access to care and household finances. This comparison is educational, not insurance advice, eligibility confirmation, or a guarantee of claim payment. Seek authoritative plan information for a consequential choice. This calculator is general educational information. It is not insurance, tax, legal, medical, veterinary, travel, or financial advice; it cannot confirm eligibility or guarantee reimbursement. Read the current contract and use the responsible insurer, authority, clinician, veterinarian, travel provider, or qualified adviser for consequential decisions.