The Retirement Plan That Treats Health Insurance Like Part of the Math
The Retirement Plan That Treats Health Insurance Like Part of the Math
What if early retirement is not just about how much money you have — but about which money you spend, when you spend it, and how much taxable income you create?
Most retirement plans begin with one question:
After working through our own numbers, I think that question is incomplete.
The question that has become much more important for us is:
That one question changed the way I think about early retirement.
We are not trying to build the largest possible account balance. We are not trying to blindly withdraw 4% every year. And we are definitely not planning to spend money simply because a retirement calculator says that we could.
Spend only what we need.
Keep health insurance affordable.
Let the rest keep growing.
The Big Idea
Our target transition begins when I am about 58½ years old. At that point, Kellie will be 66 years and 2 months old and receiving Social Security.
We will have several different kinds of money available: cash, Roth accounts, traditional retirement accounts, and Social Security. The amount we have matters, but I am increasingly convinced that the order in which we use those accounts may matter almost as much.
Stage 1: Age 58½ to 59½
For approximately the first year, the plan is remarkably simple: live primarily from cash.
Kellie's Social Security will already be coming into the household. That means I do not need to immediately start pulling money from a Roth IRA or traditional retirement account simply because I stopped working my old job.
The cash reserve becomes the bridge.
Every dollar we can spend from an existing cash reserve is a dollar we do not need to manufacture as taxable retirement income during that transition year.
Stage 2: Age 59½ to 65
At 59½, Roth money becomes especially useful. Under current IRS rules, Roth IRA earnings can generally be distributed tax-free once the qualified-distribution requirements are met, including the age 59½ and applicable five-year rules.
That can make a Roth IRA extremely valuable during the years before Medicare because it may provide spendable cash without creating the same taxable income that a traditional IRA or 401(k) distribution would.
And taxable income matters because, under today's rules, Michigan's Healthy Michigan Plan uses Modified Adjusted Gross Income — MAGI — when determining eligibility for qualifying adults ages 19 through 64 who are not enrolled in Medicare.
Michigan is also implementing new work or approved-activity requirements beginning in 2027 for some Healthy Michigan Plan participants. The rules when I reach my late 50s will almost certainly not be identical to today's rules, so I am not building the plan around one exact future Medicaid income number.
Possible Is Not the Same as Necessary
When we modeled the Roth account, I wanted to understand the outer boundary. In other words: what is possible if we ever need a lot of money?
That does not mean I intend to spend that amount. I have lived on dramatically less than the maximum withdrawal numbers for most of my life.
A more realistic range for the Roth bridge might look something like this:
| Monthly Roth Draw | Annual Amount | How I View It |
|---|---|---|
| $2,000 | $24,000 | Very realistic |
| $2,500 | $30,000 | Comfortable planning range |
| $3,000 | $36,000 | Still well below our modeled maximum |
The point of calculating a much larger possible withdrawal was not to create a bigger lifestyle. It was to answer: If life throws something expensive at us, does the plan still work?
That is what I want the maximum number to tell me. It is a safety margin — not permission to spend everything.
Meanwhile: Let the Pretax Money Grow
During the years when controlling MAGI is especially useful, the goal is to avoid unnecessary withdrawals from the traditional 401(k) and IRA accounts. That money can remain invested.
Flexible spending money that can help us cover the gap without unnecessarily increasing taxable income.
Long-term money that can continue compounding until there is a good reason to withdraw or convert it.
Stage 3: Medicare Changes the Math at 65
Age 65 changes the healthcare side of the plan. I become Medicare eligible. But Medicare is not free, and this is where income planning becomes important for a completely different reason.
In 2026, the standard Medicare Part B premium is $202.90 per month per person. For married couples filing jointly in 2026, the first IRMAA income threshold begins above $218,000 of MAGI. Those exact numbers will change long before I reach Medicare. The important thing is understanding the system.
Medicare Usually Looks Back Two Years
Medicare IRMAA generally uses tax information from two years earlier.
| Your Income Year | Can Affect Medicare Costs At |
|---|---|
| Age 63 | Age 65 |
| Age 64 | Age 66 |
| Age 65 | Age 67 |
| Age 66 | Age 68 |
Medicare Needs Its Own Line in the Retirement Budget
One mistake I do not want to make is pretending that turning 65 suddenly makes healthcare free. Depending on the coverage we choose, we still need to think about Part B, prescription coverage, supplemental coverage or Medicare Advantage, deductibles, copays, dental, vision, and other out-of-pocket healthcare expenses.
That is not a prediction of what our actual Medicare coverage will cost. It is a planning cushion.
Our Plan vs. a More Aggressive Roth-Conversion Plan
A common recommendation for someone entering retirement with low taxable income is to start converting traditional retirement money into Roth accounts. There can be excellent reasons to do that. A conversion can reduce the amount left in pretax accounts and potentially reduce future required distributions.
But a Roth conversion is generally taxable income in the year of the conversion. So I think there is another question that has to be asked:
If we can make a modest conversion and remain comfortably below an IRMAA threshold, Medicare may not cost us an extra dollar because of it. But I see no reason to cross an income threshold casually just because someone says that every low-income year must be filled with Roth conversions.
Stage 4: Age 65 to 67
By this point, Medicaid is no longer driving my personal healthcare strategy. Medicare is.
My instinct during these two years is not to manufacture large amounts of taxable income unless there is a compelling long-term reason.
That does not mean “never do a Roth conversion.” It means only convert money when the tax and Medicare math says it is worth doing.
Every year we can look at our natural household MAGI, federal tax brackets, current IRMAA thresholds, Part B and Part D premiums, actual spending needs, the size of the pretax account, and future required minimum distributions — then make the decision using that year's real numbers.
Stage 5: My Social Security Starts at 67
My current Social Security planning estimate at age 67 is approximately $2,963 per month. Kellie's planning estimate is approximately $2,032 per month.
If our lifestyle continues to look anything like it has throughout our working lives, Social Security could eventually cover a large portion of our normal recurring expenses. The retirement accounts then become less about surviving and more about travel, large purchases, home repairs, healthcare, business projects, tax management, unexpected expenses, and quality of life.
The Entire Plan in Fifth-Grade English
- Age 58½ to 59½: Spend cash.
- Age 59½ to 65: Spend only the Roth money we need.
- The whole time: Let the big pretax retirement account keep growing unless there is a good reason to touch it.
- Age 65: Start Medicare and watch taxable income carefully.
- Age 67: Start my Social Security.
- Every year afterward: Check taxes, Medicare and actual spending before moving large amounts of money.
The Most Important Retirement Number Might Not Be Net Worth
Retirement discussions are obsessed with net worth. But working through our own plan has convinced me that another number deserves much more attention:
Modified Adjusted Gross Income
Depending on your situation, MAGI can affect health coverage before Medicare, Medicare premiums later, federal income taxes, Social Security taxation, Roth conversion decisions, and retirement withdrawal strategy.
Two households could have identical investment balances and still experience very different retirement costs because they pull money from different accounts at different times.
Possible vs. Smart
Possible
Pull much more from the Roth.
Spend dramatically more every month.
Use the portfolio simply because the money is available.
It might work mathematically.
Smart for Us
Pull only what we actually need.
Keep more Roth available for later.
Allow the 401(k) and IRA money to grow.
Keep maximum flexibility.
Knowing the maximum withdrawal number still matters. It tells me the furnace can break, the car can die, we can take a trip, medical expenses can happen, the business can need money — and the retirement plan does not immediately fall apart.
That is what I want financial independence to feel like. Not permission to spend everything. Permission to stop treating every unexpected expense like an emergency.
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Visit the ShopFinal Thought
I used to think retirement planning was mainly about accumulating enough money. Now I think accumulation is only half of the game. The second half is learning how to spend it.
Cash, Roth accounts, traditional retirement accounts and Social Security are not interchangeable. They can affect taxes and healthcare costs in very different ways.
Our actual retirement is still years away. Medicaid rules will change. Medicare premiums will change. Tax brackets will change. Social Security will change. Investment markets will certainly change.
That is why I do not view this as a rigid spreadsheet that must be followed perfectly. It is a framework.
Use the right bucket.
Protect health-insurance costs.
Let the rest grow.
Sometimes the most important retirement strategy is not finding another way to make money. It is learning how to make the money you already have work together.
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Subscribe on YouTubeExplore the BlogSources & Current-Rule References
Michigan Healthy Michigan Plan:
Michigan Department of Health & Human Services
Healthy Michigan work requirements beginning in 2027:
Michigan Department of Health & Human Services
Roth IRA rules:
IRS Topic No. 451
Medicare IRMAA MAGI and two-year lookback:
Social Security Administration
Medicare costs:
Medicare.gov
Important: Dollar amounts and eligibility rules cited above reflect current rules where stated. Our retirement date is years away, so all applicable rules and thresholds will need to be checked again before making actual financial or healthcare decisions.
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