Michigan Does Not Tax Social Security, But Uncle Sam Still Does

You worked for decades to earn your Social Security benefit. Now you are getting close to retirement and someone finally tells you the good news: Michigan does not tax Social Security income at the state level. You exhale. One less thing to worry about.

Then the Medicare bill arrives, and it is hundreds of dollars higher than you expected. Or you file your federal return and discover a significant portion of your Social Security benefit is taxable after all. The state gave you a break. The federal government did not.

This is one of the most common and most expensive surprises Michigan retirees face. The state exemption is real, and it matters. But stopping there, without understanding the federal layer and the Medicare income rules, leaves you exposed to costs that are completely avoidable with the right plan.

Michigan's Social Security Exemption Is Real, and It Is Not the Whole Story

Michigan does not tax Social Security benefits at the state level. This is confirmed by Michigan Treasury guidance and is a genuine advantage for retirees in this state compared to the many states that do impose state income tax on benefits.

That is the good news. Here is what sits underneath it.

At the federal level, up to 85 percent of your Social Security benefit can be subject to ordinary income tax, depending on your combined income for the year. The IRS uses a calculation called "provisional income" to determine how much of your benefit gets taxed. Provisional income includes your adjusted gross income, any tax-exempt interest, and half of your Social Security benefit. If that number crosses certain thresholds, a portion of your benefit becomes taxable.

This means the accounts you draw from before you claim Social Security matter enormously. A large withdrawal from a traditional IRA or 401(k) in the same year you begin collecting benefits can push your provisional income across the threshold and trigger federal tax on benefits you assumed were safe. This is not a tax law that gets a lot of attention. It catches people every year.

The Medicare Surcharge Many People Never See Coming

There is a second layer of risk that is entirely separate from the income tax question. It is called IRMAA, the Income-Related Monthly Adjustment Amount, and it is the reason a perfectly good withdrawal decision can quietly raise your Medicare premiums by hundreds of dollars per month.

Medicare Part B and Part D premiums are not fixed. They are based on your income from two years earlier. If your income in a given year exceeds certain thresholds, you pay a surcharge on top of the standard premium. The jump from one bracket to the next happens when you cross a single dollar of income. For a married couple, both spouses pay the surcharge independently, which means the cost doubles instantly.

Many Michigan retirees discover IRMAA after a one-time event: a Roth conversion, a large IRA distribution, or the sale of a property. They made a reasonable financial decision without realizing it would push them across an IRMAA threshold. The surcharge hits two years later and lasts the full calendar year.

This is the sequence that creates the problem. A withdrawal strategy that looks fine on paper triggers a taxable event. That event raises provisional income. Two years later, Medicare premiums increase. The original decision already happened and cannot be undone.

There is a name for this pattern: the Haphazard Withdrawal. Pulling income from whatever account is convenient, without a plan for how each withdrawal interacts with Social Security taxation and Medicare premiums, is one of the most expensive habits in retirement. Where you take your income from is just as important as how much you take.

The Five-Year Blind Spot and Why It Matters for Michigan Retirees

Here is where this gets specific to your situation if you are approaching retirement in Michigan.

Michigan's Public Act 4 of 2023 (the "Lowering MI Costs Plan") is phasing out the old limits on Michigan's retirement income subtraction. In 2025, retirees born between 1946 and 1966 can deduct up to 75 percent of the maximum, which is $49,422 for a single filer and $98,845 for a joint filer, according to Michigan ORS and Michigan Treasury guidance. In 2026, the subtraction reaches its full amount: $67,610 for a single filer and $135,220 for a joint filer. That is a meaningful state-level deduction on retirement income.

The interaction between that deduction, your withdrawal sequencing, and your federal tax exposure creates a planning window that did not exist before 2023. The years between retirement and the start of Social Security and Required Minimum Distributions are often the lowest-income years of your financial life. That window is where structured Roth conversions, careful withdrawal sequencing, and provisional income management can pay off most.

Many people miss this window entirely. They retire, they start drawing income the same way they always did, and they never look at the federal tax exposure on their Social Security or the IRMAA math on their Medicare. By the time the consequences show up, the window has closed. This is the Five-Year Blind Spot, and it costs more in Michigan now because the new state deduction changes the math on how much retirement income you can move at a favorable effective rate.

The Part Most Plans Skip

A good retirement plan for a Michigan household does more than confirm that Social Security is not taxed at the state level. It maps the interaction between all income sources across the years before and after Social Security begins. It tracks provisional income. It accounts for IRMAA thresholds for both spouses. And it builds a withdrawal sequence that keeps you below the cliffs that silently raise your costs.

Think of a qualified account as Uncle Sam's retirement plan, subject to his rules and his timing. He decides when you must take distributions, and every dollar you pull is taxed as ordinary income. That ordinary income interacts with your Social Security benefit, your IRMAA bracket, and, after 2026, Michigan's newly expanded retirement subtraction. The accounts you draw from first, and in what order and amount, determine how much of your income you actually keep.

That is not a question with one right answer. It depends on your ages, your asset mix, your expected Social Security benefit, your health, and the specific structure of your accounts. Over 90 percent of the people who walk into our office are carrying avoidable risk in their current plan, according to our own intake data, and the interaction between Social Security taxation and Medicare premiums is one of the most common gaps we find.

Find Out Exactly Where Your Plan Stands Before the Window Closes

The Michigan Social Security exemption is real and worth knowing. But it is one piece of a more complicated picture. If your current plan does not address provisional income, IRMAA thresholds, and the new Michigan retirement subtraction together, you may be paying more than you should in federal taxes and Medicare premiums, and leaving state tax savings on the table at the same time.

In a Discovery Session with Krisstin, we look at your specific income sources, your account structure, and your timeline. We show you exactly where the federal tax exposure on your Social Security sits, whether IRMAA is a risk, and how the Public Act 4 of 2023 changes interact with your withdrawal plan. There is no cost and no obligation.

Book a Discovery Session: https://nh-rs.com/book