The Marriage Penalty: What High-Earning Same-Sex Couples Need to Know in 2026

Marriage equality gave LGBTQ+ couples access to tools that had been off-limits for decades. Spousal Social Security benefits. Unlimited inheritance between spouses. Joint tax filing. The ability to add a spouse to your health insurance without federal income tax on those benefits. These are real, lasting financial wins. But nobody likes to talk about the flip side. For couples where both partners earn high incomes, getting married can sometimes mean paying more in federal taxes than you would as two single people. This is the marriage penalty, and it affects same-sex couples the same way it affects any dual-income household.

Why Does the Marriage Penalty Exist?

The marriage penalty exists because the U.S. tax system's brackets for married filers are not simply double the brackets for single filers at every income level. Through the middle income ranges they are roughly doubled. But at the top, the gap narrows — and that is where two high earners can end up paying more as a married couple than they would as two single people.

Here is the key: the tax brackets for married couples filing jointly are not simply double the brackets for single people across the board. In the lower and middle income ranges, they are. At the top, they are not. That gap at the top is where the marriage penalty same-sex couples (and all dual-income couples) encounter.

What Do the 2026 Tax Brackets Actually Look Like for Married vs. Single Filers?

The 2026 federal income tax brackets, sourced from IRS Revenue Procedure 2025-32, show that through the 24% bracket, the married thresholds are almost exactly double the single ones. But at 35%, two single filers can each earn up to $640,600 before hitting the top rate — $1,281,200 combined. A married couple hits the top rate at $768,700 combined. That gap is where the marriage penalty lives.

Single filers:

• 10% — up to $12,400
• 12% — $12,401 to $50,400
• 22% — $50,401 to $105,700
• 24% — $105,701 to $201,775
• 32% — $201,776 to $256,225
• 35% — $256,226 to $640,600
• 37% — above $640,600

Married filing jointly:

• 10% — up to $24,800
• 12% — $24,801 to $100,800
• 22% — $100,801 to $211,400
• 24% — $211,401 to $403,550
• 32% — $403,551 to $512,450
• 35% — $512,451 to $768,700
• 37% — above $768,700

How Much Can the Marriage Penalty Actually Cost a High-Earning Same-Sex Couple?

The answer depends on your income and how equal it is between partners. When both partners earn very similar, very high incomes, the marriage penalty can cost thousands of dollars per year. When incomes are meaningfully different, joint filing usually produces a lower bill. The only way to know is to run both scenarios every single year.

Example: Jordan and Alex, a married same-sex couple in California. Jordan earns $300,000 plus $100,000 in RSU vesting. Alex earns $250,000 plus $75,000 in RSUs. Combined gross: $725,000. Both max their 401(k)s and HSA, reducing combined income by $57,750 before the standard deduction. In this case, they actually pay less filing jointly — because Jordan earns significantly more than Alex, the income gap works in their favor. The marriage penalty same-sex couples need to watch for is most severe when both partners earn nearly identical, very high incomes.

What Other Tax Disadvantages Can Come With Marriage for High Earners?

Beyond the bracket issue, three other areas can cost high earners more when married: the net investment income tax threshold, Roth IRA contribution limits, and Medicare premium surcharges. None of these is a reason to avoid marriage, but all are worth knowing about and planning around.

Does the Net Investment Income Tax Treat Married Filers Fairly?

There is a 3.8% extra tax on investment income (like dividends and capital gains) for people above a certain income level. For single filers that threshold is $200,000. For married couples it is $250,000 — not $400,000. So a couple with investment income can hit this threshold faster when married than they would as two single filers.

How Does Marriage Affect Roth IRA Contribution Eligibility?

A Roth IRA is a retirement account where your money grows tax-free. In 2026, the ability to contribute phases out for married couples between $242,000 and $252,000 of household income. For single filers, the phase-out is $150,000 to $165,000. For very high earners who are already above these thresholds, neither path allows direct Roth contributions — but for couples near these ranges, marriage can reduce flexibility.

Can Getting Married Increase Your Medicare Costs?

Once you reach Medicare age, your income affects how much you pay for Medicare premiums. The income thresholds that trigger higher Medicare premiums do not perfectly double for married filers, which means some couples end up paying surcharges they would have avoided as two single people. This is a longer-term planning consideration worth flagging with a financial planner as you approach retirement.

What Should You Actually Do?

Run both filing scenarios every year with a tax professional or financial planner. The marriage penalty or bonus calculation changes as your income, equity compensation, and deductions shift from year to year. A one-time analysis is not enough.

For most LGBTQ+ couples with meaningful income differences between partners, filing jointly produces lower taxes and access to benefits — like spousal IRA contributions and the unlimited marital deduction — that outweigh any bracket disadvantage. For couples with very similar, very high incomes, the marriage penalty same-sex couples face deserves a hard look every single year.

Frequently Asked Questions

Is the marriage penalty real or a myth?

It is real — but it only applies in specific situations. When both partners earn similar, high incomes, the combination of those incomes under married filing jointly can push more money into higher brackets than two single returns would. For couples with unequal incomes, the opposite is usually true.

Should we get divorced to avoid the marriage penalty?

No. A "tax divorce" is an extreme step with major consequences — you lose spousal Social Security benefits, the unlimited marital deduction, spousal IRA rights, and more. The right response to the marriage penalty same-sex couples face is annual tax planning, not dissolving your marriage.

What is married filing separately?

Married filing separately (MFS) means you and your spouse each file your own tax return instead of one joint return. The standard deduction is $16,100 per person instead of the $32,200 joint amount, and you lose access to several credits. MFS is rarely better than filing jointly, but it is worth modeling in high-income households.

Does the marriage penalty affect same-sex and opposite-sex couples differently?

No. Since the Supreme Court's Obergefell v. Hodges ruling in 2015, same-sex married couples have exactly the same federal tax treatment as opposite-sex married couples. The marriage penalty same-sex couples face is the same penalty that applies to all dual-income married households.

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