Last year, I met with a woman I'll call Sandy*. Her story reflects situations I've encountered while working with surviving spouses.
Her husband, Jim, had passed away nine months earlier after 51 years of marriage. She came to see me because she needed help organizing her finances, making a plan, and understanding what the future looked like.
Jim had always handled their finances.
They had done well. They lived modestly, had accumulated a sizable investment portfolio, and had significant unrealized gains in several mutual funds. They also held substantial cash in money market funds generating taxable interest.
As we began putting the pieces together, one thing Sandy hadn't anticipated was how much her tax situation would change after Jim's death.
It's something I see frequently with surviving spouses.
Income may go down. Expenses may go down. Yet, surprisingly, the tax bill can actually go up.
Here are five things every surviving spouse should understand.
For the year your spouse dies, you can generally still file a joint tax return.
After that, many surviving spouses in the situations we work with will file as single taxpayers. Some people with a qualifying dependent child may be eligible to use the qualifying surviving spouse filing status for up to two years after the year of death, so filing status should be confirmed with a tax professional.
That's a bigger change than many people realize.
Here's a simplified look at the 2026 federal income tax brackets:
| Tax Rate | Married Filing Jointly | Single |
| 10% | $0-$24,800 | $0-$12,400 |
| 12% | $24,801-$100,800 | $12,401-$50,400 |
| 22% | $100,801-$211,400 | $50,401-$105,700 |
| 24% | $211,401-$403,550 | $105,701-$201,775 |
| 32% | $403,551-$512,450 | $201,776-$256,225 |
| 35% | $512,451-$768,700 | $256,226-$640,600 |
| 37% | Over $768,700 | Over $640,600 |
Note: These brackets apply to taxable income, not total income. They reflect marginal tax rates, so different portions of taxable income may be taxed at different rates.
Across several brackets, the income thresholds for single taxpayers are roughly half those for married couples filing jointly.
Even if household income declines after a spouse's death, the surviving spouse may end up paying a higher percentage of their income in taxes.
That's why I don't like waiting until the following April to find out what happened. I'd rather estimate the new tax picture early and make adjustments along the way.
Social Security delivers another surprise.
When both spouses receive Social Security, and one dies, the surviving spouse does not simply continue receiving both full benefits.
Depending on the survivor's age, existing benefit, and claiming decision, they may qualify for a survivor benefit based on the deceased spouse's record. If their own benefit is lower, Social Security generally pays a combined amount equal to the higher eligible benefit rather than the sum of both benefits.
Think about what just happened: household Social Security income went down, but the surviving spouse may eventually face less favorable tax brackets.
That's a combination many people don't anticipate.
If we determine that a surviving spouse is likely to owe more in taxes, the next question is how to pay them.
Quarterly estimated tax payments are certainly an option. But for someone who has just lost a spouse - particularly when that spouse previously handled the finances - I don't love adding four more deadlines to remember.
Often, there's another solution.
We may be able to increase federal tax withholding on IRA distributions, pension or annuity payments, or even Social Security. Social Security recipients can request voluntary federal withholding using Form W-4V.
The appropriate form and withholding options depend on the source and type of payment, so the change should be coordinated with the payer and the surviving spouse's tax professional.
I'd rather help Sandy create a system that works automatically than hand her four more dates to put on the calendar.
This one can potentially save a family a significant amount of money.
When someone dies, many inherited assets receive an adjustment in basis, usually based on their fair market value at the date of death. This is commonly called a step-up in basis.
Suppose Jim bought an investment years ago for $100,000, and it was worth $300,000 when he died.
Depending on how the asset was owned, some or all of that $200,000 in appreciation may no longer be included when calculating a future capital gain.
That's a big deal.
But someone needs to make sure the cost-basis records are up to date. This is especially important for individual stocks, mutual funds, real estate, and other appreciated assets you may have held for decades.
It's one of those administrative details that's easy to overlook during a difficult year - and potentially expensive to miss.
This is one of my least favorite surprises to explain to a new surviving spouse.
IRMAA stands for Income-Related Monthly Adjustment Amount.
In plain English, Medicare can charge higher-income beneficiaries an additional premium for Medicare Part B and Part D.
Here's the frustrating part: the thresholds depend on your tax filing status.
Someone who was comfortably below the threshold as part of a married couple can suddenly find themselves above the applicable threshold as a single taxpayer.
We've seen surviving spouses discover they are paying hundreds of dollars more each month for Medicare than expected.
After losing your spouse, an unexpected increase in your Medicare bill can feel like adding insult to injury.
But don't automatically assume you have to pay it.
The death of a spouse is specifically considered a life-changing event for IRMAA purposes. If your household income has fallen, you may be able to ask Social Security to reconsider the surcharge using Form SSA-44 rather than relying on the older tax return Medicare would ordinarily use.
It's one more reason to review your tax situation proactively rather than simply accepting the first Medicare premium notice that arrives.
When Sandy came to see me, she wasn't looking for sophisticated tax strategies.
She wanted someone to help her answer a much more fundamental question:
"Am I going to be okay, and what do I need to do next?"
That's where a credible financial planner and CPA can be invaluable.
There are tax brackets to anticipate. Social Security benefits to understand. Withholding to adjust. Investment cost basis to verify. Medicare premiums to review.
My advice to a surviving spouse is simple: don't wait until tax season to start planning.
Meet with a credible financial planner and CPA as soon as you're ready. Let them help organize the details, anticipate what's changing, and build a plan.
After losing a spouse, you already have enough to carry.
Taxes shouldn't become one more unpleasant surprise.
The months after a spouse's death can involve financial decisions about taxes, Social Security, investments, Medicare, estate matters, and day-to-day cash flow. These decisions are often interconnected and do not all need to be made at once.
Download our Practical Financial Guidance After the Loss of a Loved One for guidance on what may need attention now, what can usually wait, and who may need to be involved.
If you would like help organizing the financial details and understanding how the decisions fit together, we invite you to start a conversation with one of our financial planners.
A surviving spouse can generally file a joint federal income tax return for the year of the deceased spouse's death, provided the normal requirements are met, and the surviving spouse has not remarried before year-end. Filing status may change in later years.
Not necessarily. Income, deductions, filing status, investment income, retirement distributions, and other factors all affect the outcome. However, narrower single-taxpayer brackets may cause some surviving spouses to pay a higher effective tax rate, even when household income declines.
A surviving spouse does not generally continue receiving both full monthly benefits. The survivor may receive either their own benefit or a survivor benefit based on the deceased spouse's record, with the total generally reflecting the higher eligible amount.
Potentially, but the amount depends on how the asset was owned and on applicable federal and state rules. Some jointly owned assets may receive an adjustment only to the deceased spouse's share. Cost-basis records should be reviewed before an asset is sold.
Possibly. The death of a spouse is a recognized life-changing event for Medicare IRMAA purposes. If household income has declined, the surviving spouse may ask Social Security to use more recent income information when reviewing the surcharge.
*Certain details have been combined or changed to protect client privacy.
This example is provided for illustrative purposes only. Individual situations vary and results will differ.
This material is for educational purposes only and is not intended as individualized investment, legal, tax, or accounting advice. Individual circumstances vary. Readers should consult their own professional advisors regarding their specific situation.
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Shane Tenny, CFP®, is Managing Partner of Spaugh Dameron Tenny, where he helps high-net-worth individuals and families navigate complex financial decisions with clarity, structure, and confidence. Since joining the firm in 2000, Shane has worked with clients through major financial transitions, including career changes, liquidity events, retirement, and multigenerational planning. His approach combines comprehensive financial planning with a focus on behavioral finance, including advanced studies in Behavioral Economics through the University of Chicago Booth School of Business. Shane is the author of Your Next Million, former host of the Prosperous Doc® Podcast, and a nationally recognized financial advisor, speaker, and educator.
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