Medicare Advantage vs. Medigap Total Cost Calculator

Introduction: comparing Medicare Advantage and Medigap total costs

Choosing between Medicare Advantage and Medigap is usually a question of total cost, not just monthly premium. This calculator puts the plan premium, optional drug premium, expected annual out-of-pocket spending, and your comparison horizon into the same estimate so you can see how the two paths stack up over time.

The idea is simple: if one plan looks cheaper up front but exposes you to more annual spending, the lower sticker price may disappear once you project it across the years you expect to stay enrolled. If the other plan asks for a higher monthly payment but keeps year-to-year spending lower, the long-run total may surprise you in the opposite direction.

The sections below explain the Medicare-specific inputs, show the arithmetic the calculator uses, give a worked example with realistic numbers, and describe what to watch for when comparing one quote against another.

What Medicare decision this calculator helps you make

This Medicare Advantage vs. Medigap cost calculator is for the moment when you have two quotes in front of you and need to know which is likely to cost less over the same number of years. It is especially useful when the monthly premium difference is obvious but the annual out-of-pocket estimate is less obvious, because that annual amount can dominate a three-year or five-year comparison.

In practice, the calculator helps answer whether a lower Advantage premium makes up for higher expected out-of-pocket spending, whether a higher Medigap premium buys enough cost stability to offset its monthly bill, and what happens when drug premiums differ. The result gives each option a single apples-to-apples projected total. It is a planning estimate, not a coverage recommendation or enrollment decision.

How to use this Medicare Advantage vs. Medigap calculator

Start with current plan quotes and your best estimate of the costs you would pay beyond premiums. Enter the Advantage plan premium and any monthly drug-plan cost, then its expected annual out-of-pocket amount. Repeat those entries for the Medigap arrangement, including separate Part D drug coverage if it applies. Finally, enter the number of years you want to compare and select Calculate.

For a clean Medicare comparison, both sides must describe the same situation. It is fine for one side to have a separate drug premium and the other not to have one, as long as that matches the coverage you would actually use. Keep monthly amounts in monthly fields and annual amounts in annual fields. The calculator cannot correct mismatched assumptions, so realistic quotes make its result more useful.

Inputs: choosing Medicare Advantage and Medigap estimates

The fields separate the cost pieces that commonly matter in a Medicare choice. Your plan and drug premiums are recurring monthly charges. The annual out-of-pocket entries are your expected yearly spending beyond those premiums, such as cost sharing and other expenses you choose to include consistently in both scenarios. The horizon is the number of complete years over which you want to project both options.

• Advantage plan monthly premium: use the quoted premium for the Medicare Advantage option.
• Advantage drug plan monthly premium: enter a separate monthly drug cost only if it applies to your comparison.
• Estimated annual out-of-pocket for Advantage: use the yearly spending figure that best fits your expected care use.
• Medigap monthly premium: enter the premium for the Medigap policy under review.
• Medigap drug plan monthly premium: include the separate Part D or other monthly drug cost when applicable.
• Estimated annual out-of-pocket for Medigap: enter expected yearly spending beyond premiums.
• Comparison horizon in years: choose one year, three years, five years, or another period that fits your decision.

When a number is uncertain, test more than one realistic case. For example, run a baseline estimate and then a higher-care-use estimate with larger annual out-of-pocket values. That is more informative than treating a single estimate as exact when health use, plan rules, and premiums can change. The calculator works best as a way to compare plausible scenarios.

Formulas: how this Medicare cost comparison is calculated

This Medicare cost comparison uses straightforward arithmetic. For each option, it adds monthly premiums, multiplies that monthly total by 12 and by the years entered, then adds annual out-of-pocket spending once for every year. This turns a monthly quote plus yearly spending into a projected total over the same time period.

For the Advantage side, the calculator uses the plan premium, drug premium, annual out-of-pocket estimate, and comparison horizon:

For the Medigap side, the formula follows the same pattern with the Medigap inputs:

The reported difference is the Advantage total minus the Medigap total. A positive difference means Advantage costs more under the assumptions entered; a negative difference means Medigap costs more. Because the formula is linear, changing a monthly premium affects every month in the horizon, while changing annual out-of-pocket spending affects every year.

Worked example: comparing Medicare Advantage and Medigap over 3 years

Consider a three-year comparison with an Advantage monthly premium of $24.00, an Advantage drug premium of $18.00, and expected Advantage out-of-pocket spending of $2,700.00 each year. For the Medigap arrangement, assume a $132.00 monthly premium, an $18.00 monthly drug premium, and $600.00 in expected annual out-of-pocket spending.

The Advantage side has a combined monthly premium of $42.00. Across 36 months, its premium portion is $1,512.00. Its annual out-of-pocket estimate adds $8,100.00 across three years, for an Advantage total of $9,612.00.

The Medigap side has a combined monthly premium of $150.00. Across 36 months, its premium portion is $5,400.00. Its annual out-of-pocket estimate adds $1,800.00 over three years, for a Medigap total of $7,200.00. The difference is $2,412.00, so the Medigap scenario is less expensive over this horizon despite its higher monthly premium. Lower annual spending more than offsets the premium difference in this particular example.

Comparison table: how Medigap premium changes affect total cost

This table holds the worked example’s Advantage quote, drug premiums, yearly out-of-pocket assumptions, and three-year horizon constant while changing only the Medigap monthly premium. It illustrates why a premium change is multiplied across every month of the comparison.

When testing your own quotes, keep the same horizon in each run so you are comparing like with like. Changing the premium and the years simultaneously can hide which assumption is driving the difference.

How to interpret the Medicare cost comparison

The result panel answers one question first: which plan costs less under the assumptions you entered? If the difference is large, the lower-cost scenario is usually clear. If it is small, the decision may hinge more on provider access, prescription needs, travel habits, extra benefits, and how comfortable you are with potentially variable yearly spending.

Do not focus only on the monthly premium. In a Medicare comparison, annual out-of-pocket spending can outweigh a low premium quickly, especially over several years. Conversely, a higher monthly Medigap price can still yield a lower projected total when it is paired with substantially lower yearly costs.

Use the totals with the plan documents. Confirm that doctors, hospitals, prescriptions, networks, service areas, and coverage rules fit your needs before choosing a plan. A plan that is cheaper in this estimate may not be the better fit if it does not cover the care you expect to use.

Limitations and assumptions for Medicare cost estimates

This Medicare Advantage vs. Medigap calculator is intentionally simple. It models premiums and expected yearly out-of-pocket spending, but it does not evaluate network quality, referral rules, formularies, travel coverage, enrollment eligibility, or changes in health from year to year. Those factors can be very important, but they are outside this page’s arithmetic.

• Static assumptions: entered values are treated as unchanged in every year of the horizon.
• Coverage differences: the calculator does not compare doctors, service areas, drug formularies, or extra benefits.
• Premium timing: monthly premiums are projected across all months, while annual out-of-pocket amounts are applied once per year.
• Rounding: totals are displayed to cents, so tiny rounding differences are normal.
• Scenario discipline: both sides should describe the same kind of situation, or the comparison may mislead even when the arithmetic is correct.

Use the result as a decision aid rather than a final enrollment answer. A careful Medicare choice combines this cost estimate with official plan materials and, when appropriate, guidance from a licensed Medicare counselor or another trusted adviser who can review your circumstances.