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Your Medicare Premiums Could Cost Almost $700 a Month in 2026 - Here's Why

Retirees could face steep surcharges based on past income.

By Sara Albertelli , Edited by Laura Hohenstein

Updated May 8, 2026

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Some retirees are opening their Medicare letters in 2026 and finding a number that feels hard to believe: monthly premiums approaching $700. That kind of increase often has nothing to do with inflation or policy changes. Instead, it's tied to a lesser-known rule that adjusts what higher-income retirees pay.

For many, this falls into the category of surprising retirement mistakes. Not because they did anything wrong, but because they didn't realize how a one-time financial move could echo years later. Understanding how IRMAA works is key to avoiding these costly surprises.

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What IRMAA is and why it affects your Medicare costs

IRMAA stands for Income-Related Monthly Adjustment Amount. It's a surcharge added to standard Medicare premiums for higher-income beneficiaries.

In 2026, most people pay the standard Part B premium of $202.90 per month. But if your income crosses certain thresholds, IMRAA increases both Part B premiums and Part D prescription drug premiums. The result: your total monthly Medicare costs could rise substantially, even if your current income has dropped.

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Why your 2026 premiums are based on your 2024 income

IRMAA uses a two-year lookback to calculate if you're required to pay the surcharge on your Medicare premium. That means your 2026 Medicare premiums are based on your 2024 tax return.

This creates a timing gap that can make the surcharge feel disconnected from your current financial reality. You might have retired in 2025 or reduced your income significantly by cutting back to part-time work. You might have even shifted into a lower tax bracket.

However, Medicare might still be looking at your higher 2024 income and adjusting your premiums accordingly.

The income thresholds that trigger higher premiums

In 2026, IRMAA begins once your modified adjusted gross income exceeds:

$109,000 (single filers)
$218,000 (married filing jointly)

From there, Medicare applies a series of income tiers. Each tier increases your premiums further, regardless of how far into that bracket your income falls. You could make $1 into the next tier up and pay more than a hundred extra dollars a month for Medicare.

This is where planning becomes important, because even a modest increase in income could push you into a higher tier.

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How the IRMAA tiers work

IRMAA isn't gradual. It works more like a step function.

If your income crosses a new bracket, you'll pay the full surcharge for that tier, no matter how far you are into that tier. Here's a simplified look at 2026 Part B premiums:

Standard: $202.90
Tier 1: $284.10
Tier 2: $405.80
Tier 3: $527.50
Tier 4: $649.20
Top tier: $689.90

That jump can feel very abrupt. As an example, if you make $137,000 per year, you'll pay $405.80 for Medicare Part B. But if you make $136,999 per year, you'll pay $284.10. If you can control your income by withdrawing less or planning ahead, avoiding adding that extra dollar is more than worth it.

Common situations that can trigger IRMAA

Many retirees don't exceed IRMAA thresholds with their regular income. However, a one-time financial event can push them over the line, even if their income falls back down to the regular level years later.

Common triggers include:

Large Roth conversions
Significant IRA withdrawals
Selling a home or investment property
Business sales or large capital gains

These events can make sense from a tax or planning perspective. But without coordination, they might also increase your Medicare costs two years later.

What to do if your income has dropped since

If your current income is significantly lower than it was two years ago due to a major life change, you may not have to pay these higher premiums. You can request a reconsideration using Form SSA-44 if you've experienced a qualifying event like retirement, reduced work hours, or the death of a spouse.

This process allows Social Security to reassess your premiums based on your current income instead of older tax returns.

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Smart strategies to reduce IRMAA exposure

Avoiding IRMAA entirely isn't always realistic. But there are ways to manage your exposure over time. Here are some of the most effective strategies:

Spreading out Roth conversions: Instead of converting large amounts in one year, small conversions over multiple years can help you stay below certain tier thresholds.
Using Qualified Charitable Distributions: If you're required to take RMDs, directing funds to charity through a QCD can satisfy the requirement without increasing your taxable income.
Planning income two years ahead: Because of the lookback rule, decisions today may affect your Medicare costs down the road. Modeling income in advance can help you avoid surprises.
Working with a financial advisor: Coordinating tax strategy, withdrawals, and Medicare can make a measurable difference, especially in higher-income years.

Bottom line

IRMAA can turn a strong financial year into a costly surprise, especially when the impact doesn't show up until two years later. If your income crossed key thresholds in 2024, your 2026 Medicare premiums could be significantly higher than expected.

IRMAA brackets are adjusted annually for inflation, which means your strategy should be revisited each year, not set once and forgotten. Even small changes in income timing or withdrawals could help you stay below a threshold and pay less each month. Taking a proactive approach now is one of the more effective smart money moves for seniors looking to control long-term health care costs.

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