Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Cheaper plan at this usage
Plan A
Annual savings
$90.00
Plan A total annual cost
$7,520.00
Plan B total annual cost
$7,610.00
Plan A worst case
$11,020
Plan B worst case
$9,760
Psst — share this and help Rex grow
One click, a permanent link with your numbers baked in.
How to use this
- 1Enter plan a monthly premium ($).
- 2Enter plan a deductible ($).
- 3Enter plan a coinsurance (%).
- 4Enter plan a out-of-pocket max ($).
- 5Enter plan b monthly premium ($).
- 6Enter plan b deductible ($).
- 7Enter plan b coinsurance (%).
- 8Enter plan b out-of-pocket max ($).
- 9Enter expected annual medical costs ($).
- 10Read your cheaper plan at this usage on the right — it updates as you type.
- 11Hit Share to keep the scenario or send it to someone.
About this calculator
A low premium with a $7,000 deductible beats a rich PPO only if you stay healthy. Comparing total annual cost at your realistic usage — not the premium alone — is the only fair test.
Worked example
Using the values the calculator loads with:
Inputs
- Plan A monthly premium: 210 $
- Plan A deductible: 6500 $
- Plan A coinsurance: 20 %
- Plan A out-of-pocket max: 8500 $
- Plan B monthly premium: 480 $
- Plan B deductible: 1500 $
- Plan B coinsurance: 10 %
- Plan B out-of-pocket max: 4000 $
- Expected annual medical costs: 5000 $
Results
- Cheaper plan at this usage: Plan A
- Annual savings: $90.00
- Plan A total annual cost: $7,520.00
- Plan B total annual cost: $7,610.00
- Plan A worst case: $11,020.00
- Plan B worst case: $9,760.00
What each field means
Inputs
- Plan A monthly premium ($)
- The plan a monthly premium used in the calculation, measured in $. Starts at 210 $ so you have a working example on load.
- Plan A deductible ($)
- The plan a deductible used in the calculation, measured in $. Starts at 6500 $ so you have a working example on load.
- Plan A coinsurance (%)
- The plan a coinsurance used in the calculation, measured in %. Starts at 20 % so you have a working example on load. Accepted range: 0–100 %.
- Plan A out-of-pocket max ($)
- The plan a out-of-pocket max used in the calculation, measured in $. Starts at 8500 $ so you have a working example on load.
- Plan B monthly premium ($)
- The plan b monthly premium used in the calculation, measured in $. Starts at 480 $ so you have a working example on load.
- Plan B deductible ($)
- The plan b deductible used in the calculation, measured in $. Starts at 1500 $ so you have a working example on load.
- Plan B coinsurance (%)
- The plan b coinsurance used in the calculation, measured in %. Starts at 10 % so you have a working example on load. Accepted range: 0–100 %.
- Plan B out-of-pocket max ($)
- The plan b out-of-pocket max used in the calculation, measured in $. Starts at 4000 $ so you have a working example on load.
- Expected annual medical costs ($)
- The expected annual medical costs used in the calculation, measured in $. Starts at 5000 $ so you have a working example on load.
Results
- Cheaper plan at this usage
- Returned as a plain value and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Annual savings
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Plan A total annual cost
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Plan B total annual cost
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Plan A worst case
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Plan B worst case
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How does the health insurance plan comparison calculator work?
A low premium with a $7,000 deductible beats a rich PPO only if you stay healthy. Comparing total annual cost at your realistic usage — not the premium alone — is the only fair test. The underlying maths is: Total = Premiums + min(expected costs, deductible) + coinsurance, capped at out-of-pocket max.
What do I need to enter?
9 values: plan a monthly premium, plan a deductible, plan a coinsurance, plan a out-of-pocket max, plan b monthly premium, plan b deductible, plan b coinsurance, plan b out-of-pocket max, and expected annual medical costs. Each field starts with a sensible default, so you can change one number at a time and watch the result move.
What does the cheaper plan at this usage result mean?
It is returned as a plain value and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds.
Is this calculator free, and do I need an account?
Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser.
How accurate is the result?
It applies the standard formula exactly, so the arithmetic is precise. Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
Who is this tool for?
It's built for anyone comparing money scenarios before committing — budgeting a payment, sanity-checking a quote, or seeing what a change in rate or term actually costs.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Health Plan Comparison Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/health-insurance-cost
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/health-insurance-cost" target="_blank" rel="noopener">Health Plan Comparison Calculator — RevenueLab</a> (2026).</p>
Source: [Health Plan Comparison Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/health-insurance-cost) (2026).