Cryptocurrency Gains and Medicare Premiums: IRMAA and the 2-Year Look-Back

Bitcoin, Ethereum, and other crypto assets held for years often have large unrealized gains. When you sell — to fund retirement, rebalance, or diversify — those gains count fully toward your IRMAA MAGI two years later, just like gains on stocks or real estate. A single filer with $90,000 in base retirement income who realizes $200,000 in Bitcoin gains can jump from paying no IRMAA to paying $6,354/year in added Medicare surcharges for the year of the sale.

How each type of crypto income counts for IRMAA MAGI

The IRS classifies cryptocurrency as property, not currency.² That means most crypto income follows the same rules as capital property — but the variety of ways crypto generates income creates several MAGI traps that don't exist with traditional investments.

The stacking problem: crypto gains on top of retirement income

Crypto gains rarely arrive in isolation. Most people approaching Medicare already have Social Security, IRA distributions, pension income, and investment dividends. Each dollar of crypto gain stacks on top of that base — and can push you over an IRMAA cliff that costs an extra $1,736–$3,470/year per person.

Example — Marcus, 64, single, base MAGI $87,000:

Marcus paid $0 in federal capital gains tax on $176,000 of gain in this example if his taxable income stayed below the 0% rate threshold — yet he still owes $6,354 in additional Medicare premiums the year this MAGI is evaluated.

The two-year look-back calendar for crypto

IRMAA is not based on what you earn this year. It's based on what you earned two years ago (your MAGI from two years prior). This creates a specific window to plan around when deciding when to sell crypto holdings.

The key insight: if you enroll in Medicare at 65, gains realized more than two years before your enrollment date have no IRMAA impact. For someone turning 65 in 2027, selling crypto in 2024 or earlier is completely outside the IRMAA window. This is one of the most underused planning levers available to pre-retirees with large crypto positions.

2026 IRMAA brackets (set on 2024 MAGI)

These are the thresholds your 2024 crypto gains flow into for 2026 Medicare premiums.⁴

For married couples, both spouses pay the surcharge separately based on the household's combined MAGI. A married couple where both are on Medicare who realize $300,000 in joint crypto gains that pushes them from Tier 0 to Tier 4 faces $12,708/year in combined added surcharges.

Calculate your crypto IRMAA impact

Enter your base retirement income and your planned crypto sale amount. The calculator shows your IRMAA tier before and after, and the annual surcharge difference.

Five strategies to reduce crypto IRMAA exposure

1. Sell before the IRMAA window opens

If you're 60–63 and planning to enroll in Medicare at 65, crypto gains realized today may fall entirely outside the IRMAA look-back window. The two-year look-back means your first IRMAA year is the year you turn 65 — and it's based on income from two years earlier. Income from three or more years before Medicare enrollment isn't evaluated at all. This is the highest-leverage planning move for pre-retirees: realize large positions now, pay the capital gains tax, and arrive at Medicare enrollment with a clean MAGI slate.

2. Batch crypto sales with other high-income events — don't avoid them

This is counterintuitive. A common instinct is to spread gains across years to soften the blow. But spreading a $300K gain over three years at elevated tiers costs more total IRMAA than selling in one year at a high tier, because spreading multiplies the number of elevated years. The better strategy is to identify the one year when your MAGI will be highest anyway — your final working year, your first Roth conversion, your first RMD year — and batch the crypto sale into that same year. You absorb only one year of elevated IRMAA instead of two or three.

Spreading makes sense only when it meaningfully keeps you below a tier threshold in each year rather than just inside a high tier for more years. Model both scenarios before deciding.

3. Use the crypto wash-sale advantage for loss harvesting

The wash-sale rule (IRC §1091) prohibits claiming a capital loss if you repurchase the same or substantially identical security within 30 days before or after the sale. This rule applies to stocks and securities — but cryptocurrency is property, not a security, so the wash-sale rule does not apply.⁵

This means you can sell Bitcoin at a loss on Monday, buy it back on Tuesday, and still claim the full loss on your tax return. For IRMAA planning, this is a powerful lever: in any year where you need to realize crypto gains, you can simultaneously harvest losses in other positions (crypto or otherwise) to reduce net MAGI. A $50,000 gain offset by $40,000 in harvested losses costs $10,000 of MAGI — not $50,000.

Caveat: the IRS economic substance doctrine and proposed legislation creating a crypto wash-sale rule have been discussed repeatedly. As of 2026, no such legislation has passed. Treat this as a current-law opportunity that may change.

4. Use QCDs to create headroom in high-crypto years

If you're age 70½ or older, Qualified Charitable Distributions (up to $111,000/person in 2026) remove IRA income from MAGI entirely. In a year when you plan to realize crypto gains, substituting QCDs for cash charitable donations reduces your base MAGI, potentially keeping the combined total under a tier threshold that the crypto gain alone would have crossed. A $111,000 QCD that replaces an IRA distribution lowers your MAGI by $111,000 — equivalent to eliminating one year of elevated IRMAA from a mid-size crypto sale.⁶

5. Stagger staking liquidation, not just sale events

If you hold proof-of-stake assets (Ethereum, Solana, and others), staking rewards are ordinary income at the moment you receive them — regardless of whether you sell the underlying asset. A $500,000 staked ETH position generating a 3% annual yield produces $15,000 in ordinary income each year that counts toward IRMAA MAGI without any sale. As you approach Medicare age, reducing staked positions (or redirecting staking rewards to a tax-deferred account equivalent, where available) can lower your ongoing MAGI exposure. This is separate from the sell/hold decision on the underlying position itself.