How the Age You Start Social Security Can Push Up Medicare Costs

When you plan for retirement, one of the biggest goals is usually to live comfortably without constantly worrying about money. The right income strategy can help make that possible.

A strong retirement plan often includes several sources of income. That may mean relying on investments such as dividend stocks and bonds, drawing from IRA or 401(k) savings, and eventually collecting Social Security. Many people even retire before they begin claiming benefits, so their income rises once Social Security starts.

That increase can look positive on paper, but it may also affect what you pay for Medicare.

How Social Security and Medicare enrollment fit together

You can begin claiming Social Security at 62, but filing before full retirement age reduces your monthly benefit. For people born in 1960 or later, full retirement age is 67. Because of that, many retirees wait until they reach full retirement age before filing.

Medicare eligibility begins at 65. That means many people become eligible for Medicare before they are ready to claim Social Security without a reduction, which is why it is common to enroll in Medicare first.

What Medicare enrollees typically pay

Most retirees do not pay a monthly premium for Medicare Part A, which covers hospital care. Medicare Part B, which covers outpatient care and diagnostic services, does require a standard monthly premium. That premium can change from year to year. The current standard amount is $202.90.

Beyond Parts A and B, Medicare beneficiaries also need prescription drug coverage. They can get that either through a Medicare Advantage plan that includes drug coverage or through a separate Part D plan. Some Advantage and Part D plans have no premium, while many others do.

Unlike Part B, Medicare Advantage and Part D plans do not have one standard monthly premium. Costs vary by plan, and different plans may provide different benefits and levels of coverage.

Why Social Security can lead to higher Medicare premiums

Although Part B has a standard premium, some beneficiaries pay more through income-related monthly adjustment amounts, or IRMAAs. These are surcharges applied to people with higher incomes, and they can increase the cost of both Part B and Part D.

Single seniors with income above $109,000 and married couples filing jointly with income above $218,000 can face IRMAAs in 2026.

Social Security can play a role here. For example, if you enroll in Medicare at 65 and then begin collecting Social Security two years later at full retirement age, those benefits could raise your income enough to trigger IRMAAs. That would mean higher Medicare premiums.

How to avoid an unexpected cost increase

If you are used to paying a certain amount for Medicare and your premiums suddenly climb because of IRMAAs, it can disrupt your retirement budget. That is why it is important to understand how retirement income affects Medicare expenses.

It is also important to remember that once Social Security begins, your income may be high enough to increase Medicare costs if your benefits are substantial and you also have significant income from other sources.

That does not necessarily mean you are bound to pay much more for Medicare once Social Security starts. If some of your savings are held in a Roth IRA, withdrawals from that account are not taxable income. As a result, they are not counted in the calculation used to determine whether IRMAAs apply.

If your only retirement income comes from Roth IRA withdrawals and Social Security, you may still be able to avoid IRMAAs even if your monthly benefit is relatively large. That is why where you keep your savings matters so much.

The bottom line

One of the biggest financial mistakes in retirement planning is failing to account for how Social Security benefits can affect Medicare premiums. It is important to understand what determines Medicare costs and to recognize that higher retirement income can mean higher expenses.

Once you understand that connection, you can work with a financial advisor to help keep Medicare costs as low as possible. That may involve choosing investments carefully or saving in a Roth account so withdrawals do not increase taxable income.

These decisions should be made well before retirement begins, not after. Meeting with a professional in advance can help you avoid unpleasant financial surprises later.

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