Health Insurance Bridge to Medicare: Calculate Your ACA Subsidy and Costs
Use this guide to understand the assumptions, inputs, results, and next steps behind the calculator.
Retiring before age 65 presents a major financial hurdle: the health insurance gap. Without an employer plan, a 60-year-old couple could easily face premiums of $20,000 per year or more until they become eligible for Medicare. This calculator shows you how to bridge that gap affordably using the Affordable Care Act (ACA) marketplace, estimating your total out-of-pocket premium costs after factoring in critical Premium Tax Credits (subsidies).
The key to an affordable early retirement health insurance strategy is managing your Adjusted Gross Income (AGI). By carefully planning your retirement withdrawals, you can qualify for significant subsidies that cap your health insurance premiums as a percentage of your income. This tool helps you quantify that savings, turning a potentially budget-breaking expense into a manageable line item in your early retirement plan.
To get started, enter your retirement age, your estimated AGI in retirement, your household size, and the estimated full monthly premium for a plan in your area. The calculator will project your net costs year-by-year until you reach Medicare eligibility at age 65.
2026 ACA Subsidy Thresholds for Early Retirees
Your eligibility for a Premium Tax Credit (subsidy) depends entirely on your household's Modified Adjusted Gross Income (MAGI) relative to the Federal Poverty Level (FPL). For most early retirees, MAGI is the same as Adjusted Gross Income (AGI). The lower your AGI, the larger your potential subsidy.
The ACA ensures you won't pay more than 8.5% of your household income for a benchmark Silver plan, regardless of how high your income is. The table below shows the estimated 2026 FPL guidelines and the corresponding income caps for different subsidy levels.
Estimated 2026 Federal Poverty Levels (FPL)
| Household Size | 100% FPL (Medicaid Floor) | 150% FPL | 250% FPL (CSR Cutoff) | 400% FPL |
|---|---|---|---|---|
| 1 Person | $15,317 | $22,976 | $38,293 | $61,268 |
| 2 People | $20,715 | $31,073 | $51,788 | $82,860 |
| 3 People | $26,117 | $39,176 | $65,293 | $104,468 |
| 4 People | $31,518 | $47,277 | $78,795 | $126,072 |
Note: These are estimates for the contiguous 48 states. Alaska and Hawaii have higher FPLs.
Your required contribution is based on a sliding scale. The closer your AGI is to the FPL, the smaller your share of the premium.
Affordable Contribution Percentage by Income Level (2026)
| If Your Income is... | You Pay No More Than... |
|---|---|
| Up to 150% of FPL | 0% of your income |
| Between 150% and 200% of FPL | 0% to 2.0% of your income |
| Between 200% and 250% of FPL | 2.0% to 4.0% of your income |
| Between 250% and 300% of FPL | 4.0% to 6.0% of your income |
| Between 300% and 400% of FPL | 6.0% to 8.5% of your income |
| 400% of FPL or more | 8.5% of your income |
For early retirees, the goal is to structure withdrawals and income to land in a "sweet spot"—low enough to maximize subsidies but high enough to cover living expenses. Use the ACA Marketplace Subsidy Calculator for Early Retirees for a more detailed look at your specific situation.
How Your Adjusted Gross Income (AGI) Controls Your Subsidy
For early retirees, AGI isn't just a number on a tax return; it's the primary lever for controlling healthcare costs. Unlike when you were working, you have significant control over your AGI through your withdrawal strategy. Understanding what counts towards AGI is the first step in building an affordable health insurance bridge.
Income Sources That INCREASE Your AGI:
- Traditional 401(k)/IRA Withdrawals: Every dollar you pull from these pre-tax accounts is counted as ordinary income.
- Pension and Annuity Payments: These are generally fully taxable and add to your AGI.
- Realized Capital Gains: Selling investments from a taxable brokerage account adds to your AGI.
- Dividends and Interest: Income from your non-retirement accounts counts.
- Part-Time Work or "Gig" Income: Any earned income contributes directly to AGI.
- Social Security Benefits: A portion (up to 85%) of your Social Security can be taxable, adding to your AGI. This is a key reason many early retirees delay Social Security. Use the Social Security Early Retirement Calculator to see the impact.
Strategies to MANAGE Your AGI:
- Withdraw from Roth Accounts: Qualified withdrawals from a Roth IRA or Roth 401(k) are tax-free and do not add to your AGI. This is the most powerful tool for managing AGI.
- Use Taxable Brokerage Assets Strategically: You can sell investments that have a high cost basis to minimize capital gains, or use tax-loss harvesting to offset gains.
- Spend Down Cash Savings: Using cash from savings or checking accounts for a year or two does not impact your AGI.
- Delay Social Security and Pensions: Postponing these income streams keeps your AGI lower during the critical bridge years.
- Complete Roth Conversions Before You Retire: Converting pre-tax funds to a Roth account creates a large tax bill (and high AGI) in the year of conversion. Doing this while still working, or in a planned low-income year before needing ACA coverage, can fill up your Roth accounts for later tax-free use. Explore different scenarios with a tax-efficient retirement withdrawal calculator.
By combining these strategies, you can design a retirement withdrawal strategy that keeps your AGI in the target zone for maximum ACA subsidies.
The Math Behind Your Health Insurance Bridge Costs
This calculator estimates your out-of-pocket health insurance costs by determining your expected subsidy and subtracting it from the full premium. The core calculations revolve around the Federal Poverty Level (FPL) and your affordable premium contribution.
The calculator first determines the FPL for your household size and location.
Federal Poverty Level for Household = Base FPL for Household Size × State Multiplier
- Base FPL for Household Size = The federal guideline for your number of dependents (from the table above).
- State Multiplier = 1.0 for the contiguous U.S., 1.15 for Hawaii, and 1.25 for Alaska.
Next, it calculates the maximum annual premium you are expected to pay based on your AGI.
Maximum Annual Premium You Pay = Annual AGI × Affordable Contribution Percentage
- Annual AGI = Your projected Adjusted Gross Income in retirement.
- Affordable Contribution Percentage = The percentage determined by your income's relation to the FPL (from 0% to 8.5%).
The subsidy is the difference between the full cost of a benchmark plan and your maximum required contribution.
Annual Subsidy = Full Annual Premium - Maximum Annual Premium You Pay
- Full Annual Premium = The estimated yearly premium for a benchmark plan before any subsidies.
Finally, your net premium is the full premium minus the subsidy you receive.
Your Net Annual Premium = Full Annual Premium - Annual Subsidy
The calculator projects these costs forward, increasing the "Full Annual Premium" each year by the premium growth rate you enter, and shows you the total cost over the entire bridge period.
Planning for Cost-Sharing Reductions (CSRs)
Beyond premium subsidies, a second, powerful ACA benefit is available to some early retirees: Cost-Sharing Reductions (CSRs). While premium credits lower your monthly bill, CSRs lower your out-of-pocket costs when you actually use your insurance. This means lower deductibles, copayments, and out-of-pocket maximums.
Eligibility for CSRs is stricter than for premium subsidies:
- Income Threshold: Your AGI must be between 100% and 250% of the Federal Poverty Level. For a two-person household in 2026, this is roughly between $20,715 and $51,788.
- Plan Choice: You must enroll in a Silver plan on the ACA marketplace to receive CSR benefits. If you choose a Bronze, Gold, or Platinum plan, you will not get CSRs, even if your income qualifies.
For an early retiree, qualifying for CSRs can be a significant financial advantage. A standard Silver plan might have a $6,000 deductible, but with strong CSRs, that could be reduced to less than $1,000. This provides a much stronger financial safety net against unexpected medical events. When building your retirement budget, factoring in a lower out-of-pocket maximum can free up other funds.
Bridge Strategy: COBRA vs. ACA Marketplace
When you first leave your job, you have two primary options for health coverage: COBRA and the ACA Marketplace. They serve very different purposes.
| Factor | COBRA | ACA Marketplace |
|---|---|---|
| Duration | Typically 18 months. | Annually renewable until Medicare at 65. |
| Cost | Very high. You pay 102% of the full premium (your share + employer's share). | Varies. Can be very low with subsidies. |
| Subsidy Eligibility | No. You cannot get ACA subsidies for a COBRA plan. | Yes. Eligibility is based on your AGI. |
| Provider Network | Identical. You keep the exact same plan and doctor network you had while employed. | Varies by plan. You will likely need to choose a new plan and confirm your doctors are in-network. |
| Best For... | Short-term (a few months) coverage when you need to maintain continuity of care with specific doctors and have already met your deductible for the year. | The entire bridge period to Medicare, especially for anyone whose AGI qualifies them for subsidies. It is almost always the most affordable option. |
Most early retirees will find the ACA Marketplace to be the superior long-term choice due to the availability of subsidies. However, if you retire late in the year and have already met your employer plan's deductible, it might make sense to use COBRA for the remaining months before switching to an ACA plan during open enrollment. Use a COBRA cost calculator to see the exact price difference.
Frequently Asked Questions
Quick answers to the questions people usually have after running the retirement calculator.
1What is a health insurance "bridge" in early retirement?
A health insurance bridge is the period between leaving employer-sponsored health coverage and becoming eligible for Medicare at age 65. Early retirees must find and pay for their own insurance during this time, typically through the ACA Marketplace or COBRA.
2Are ACA premium tax credits taxable income?
No. The Premium Tax Credit is not considered taxable income. It is a federal tax credit that either lowers your monthly premium payments directly or is claimed on your tax return.
3How do Roth conversions affect my ACA subsidy?
A Roth conversion directly increases your Adjusted Gross Income for the year of the conversion. This can dramatically reduce or eliminate your ACA subsidy. It is crucial to model the total cost: the tax on the conversion plus the lost health insurance subsidy. For this reason, many early retirees complete conversions before retiring or in a year they don't need an ACA plan.
4Can I use my Health Savings Account (HSA) to pay for ACA premiums?
Generally, no. You cannot use tax-free HSA funds to pay for most health insurance premiums, including ACA plans, unless you are collecting federal or state unemployment benefits. You can, however, use your HSA for deductibles, copays, and other qualified medical expenses.
5What happens if my income changes mid-year and I get the wrong subsidy?
You must report significant income changes to the ACA Marketplace. If your income increases, your subsidy will be reduced. If you don't report the change, you may have to pay back the excess subsidy when you file your taxes. Conversely, if your income decreases, you may be eligible for a larger subsidy.
6Is it better to have a very low AGI or just a moderately low AGI?
While a lower AGI always means a larger subsidy, having an AGI below 100% of the FPL can be problematic in states that have not expanded Medicaid. In those states, you could fall into a "coverage gap" with no eligibility for subsidies or Medicaid. Most early retirees aim for an AGI between 138% and 250% of the FPL to maximize subsidies and qualify for CSRs.
7Should I choose a Bronze, Silver, or Gold plan for my bridge?
If your income is below 250% of the FPL, a Silver plan is almost always the best choice to take advantage of powerful Cost-Sharing Reductions (CSRs). If your income is higher, the choice depends on your health needs. Bronze plans have the lowest premiums but highest out-of-pocket costs, while Gold plans are the opposite.
8What was the "family glitch" and is it fixed?
The "family glitch" was a rule that prevented families from getting ACA subsidies if one member had an offer of "affordable" self-only coverage from an employer, even if the cost to cover the whole family was unaffordable. A 2022 rule change fixed this, and now affordability is based on the cost for the whole family, making many more families eligible for subsidies.
Next Steps for Your Early Retirement Plan
Estimating your healthcare bridge cost is a critical piece of the early retirement puzzle. With this number in hand, you can build a more robust and realistic plan.
- Explore different income scenarios with the Retirement Withdrawal Strategy Calculator to see how you can manage your AGI.
- Incorporate this health insurance cost into your overall budget using our guide on how to create a retirement budget.
- See how this expense impacts your total savings goal and timeline with the comprehensive FIRE Calculator.
Last updated: July 2026