When a parent passes away, most families are not thinking about taxes. They are focused on funeral arrangements, legal paperwork, family conversations, and figuring out what comes next. Then someone asks a question that often catches everyone off guard: “What are we going to do with the house?”
For many families throughout Chicago and the South Suburbs, the family home is one of the largest assets in the estate. It may have been owned for decades, filled with memories, and passed from one generation to the next. What many people do not realize is that one tax rule could have a major impact on what happens if that home is eventually sold. That rule is called a step-up in basis, and understanding it could potentially save your family thousands of dollars in capital gains taxes.
What Is a Step-Up in Basis?
A step-up in basis adjusts the value of an inherited asset to its fair market value at the time of the owner’s death. To understand why that matters, it helps to understand what “basis” means first.
In simple terms, basis is generally what someone paid for a property, plus certain qualifying improvements made over time. For example, imagine your parents purchased a home in 1985 for $80,000 and later invested another $20,000 in improvements. Their adjusted basis would be approximately $100,000. Now imagine that same home is worth $350,000 when they pass away.
Without a step-up in basis, an heir who later sells the property for $350,000 could potentially owe capital gains taxes on a gain of approximately $250,000. With a step-up in basis, however, the property’s basis adjusts to fair market value on the date of death. In this example, the new basis becomes approximately $350,000. If the property sells shortly afterward for roughly the same amount, there may be little or no taxable gain at all.
According to IRS Publication 551 on Basis of Assets, the basis of property inherited from a decedent is generally the property’s fair market value on the date of death. That is the foundation of the entire rule.
Why Does a Step-Up in Basis Matter for Families?
Many homeowners throughout Chicago and the South Suburbs purchased their homes decades ago. In communities such as Homewood, Flossmoor, Olympia Fields, Tinley Park, Orland Park, and surrounding areas, it is common to find homeowners who bought their homes in the 1970s, 1980s, or 1990s for a fraction of what those properties are worth today.
Over time, appreciation creates a substantial difference between the original purchase price and the current market value. Without a step-up in basis, heirs could face a much larger capital gains tax bill when they sell. With a step-up in basis, however, much of that potential tax burden may disappear entirely.
For families already dealing with grief and estate administration, that can make a meaningful financial difference. If your family is beginning to navigate inherited property decisions, you may also find What Happens to a Home When It’s Inherited? helpful, as it explores many of the practical questions families encounter after a loved one’s passing.
A Real-World Example
Consider a practical example. Mary purchased her home in 1988 for $90,000. Over the years, she invested approximately $30,000 in improvements, bringing her adjusted basis to $120,000. At the time of her passing, the property was worth $420,000.
Her daughter inherited the home and sold it six months later for $425,000. Because of the step-up in basis, the daughter’s basis became approximately $420,000. Instead of potentially paying taxes on a gain of more than $300,000, the taxable gain was only around $5,000.
That is a dramatic difference. As District Capital Management explains in their guide to stepped-up basis, when someone inherits an asset the IRS allows them to step up the cost basis to its fair market value on the date of death, which can dramatically reduce the taxable gain on a subsequent sale. While every family’s situation is unique, examples like this explain why estate attorneys, tax professionals, and financial advisors pay close attention to basis calculations.
Step-Up in Basis vs. Adjusted Cost Basis
Many people confuse step-up in basis with adjusted cost basis. Although the concepts are related, they are not the same thing.
Adjusted cost basis generally reflects what the owner originally paid for the property, plus qualifying improvements made during ownership. A step-up in basis occurs after death and may significantly increase the value used for future tax calculations. Understanding the distinction matters because both concepts affect how capital gains taxes are calculated.
For a deeper explanation, you may also want to read What Is Adjusted Cost Basis and Why Does It Matter When You Sell? on this site. Additionally, IRS Publication 551 provides official guidance on how basis is calculated and documented.
What Happens When Multiple Children Inherit a Home?
Many inherited properties pass to multiple heirs. Three siblings may inherit a parent’s home equally. Four children may inherit a family property together. The good news is that the step-up in basis generally still applies to all heirs.
Each heir typically receives their share of the property using the stepped-up value established at the date of death. If the heirs decide to sell shortly after inheriting the property, they may owe little or no capital gains tax if the sale price remains close to the documented market value.
Of course, taxes are not always the biggest challenge. It is not unusual for siblings to have different opinions about whether the property should be kept, rented, renovated, or sold. When emotions, memories, and finances all collide, disagreements can occur. Families navigating those conversations may find Managing Conflict When Selling a Parent’s Home helpful as they work through those decisions together.
Why an Accurate Valuation Matters
One of the most important steps after inheriting a property is obtaining an accurate valuation. The step-up in basis is generally based on the home’s fair market value at the date of death, which means documentation matters enormously.
Families often work with licensed appraisers, estate attorneys, tax professionals, financial advisors, and real estate professionals familiar with local market conditions. Having proper documentation supports the property’s value if questions arise later. It also helps heirs make more informed decisions about whether to keep, rent, or sell the property.
Many families benefit from speaking with a financial advisor before making major decisions involving inherited assets. The free one-page guide What to Expect When You Meet With a Financial Advisor can help you prepare for those conversations.
Common Mistakes Families Make
Waiting too long to gather information is one of the most common. Many families avoid conversations about inheritance because the topic feels uncomfortable. Unfortunately, waiting often creates additional stress later. Important records become difficult to locate, and family members may have different understandings of ownership, value, or future plans. Starting the conversation earlier usually creates more options.
Another common mistake is assuming all inherited property is tax-free. A step-up in basis can reduce capital gains taxes, but it does not eliminate every possible tax issue. Estate laws, state laws, rental income considerations, and other factors may still affect the situation. AARP’s estate planning resources provide useful background information, but families should still seek advice tailored to their specific circumstances.
Finally, many families do not fully understand ownership structure. Property held in trusts, jointly owned property, transfer-on-death arrangements, and other ownership structures can create different outcomes. That is why estate attorneys and tax professionals play such an important role.
Should Parents Transfer the Home Before Death?
This is one area where families sometimes make costly mistakes. A parent may believe that transferring the home to a child during their lifetime will simplify inheritance. However, gifting property often creates different tax consequences than inheriting property.
In many situations, a child who receives a property as a gift also receives the parent’s original basis. That means they may not receive the same step-up in basis that could occur through inheritance. The result could be a much larger capital gains tax bill later. This is one reason estate planning conversations are so important. What appears to be a simple solution today may create unintended consequences years down the road.
How This Relates to Senior Housing Decisions in Chicago and the South Suburbs
Many older adults throughout the Chicago area eventually face decisions about downsizing, aging in place, moving closer to family, or transitioning to a senior community. When those conversations begin, inheritance planning often becomes part of the discussion.
The family home is frequently one of the largest assets people own. Understanding how inheritance rules may affect children and heirs helps families make more informed decisions together. These conversations are rarely just about real estate. They are about family, legacy, planning, and protecting the people you care about most.
If you are exploring related topics, you may also find The Inherited Home: Three Families, Three Very Different Outcomes and Understanding Capital Gains When You Sell Your Home Over 50 useful next steps.
When to Start the Conversation
The best time to discuss inheritance planning is before a crisis occurs. That does not mean making immediate decisions. It simply means creating awareness and gathering information. Questions worth discussing include: What is the approximate value of the home today? Is there an estate plan in place? Has the family spoken with an estate attorney? Are important records organized and accessible? What are the homeowner’s long-term housing goals? Has anyone discussed potential tax implications with a qualified professional?
Starting these conversations early almost always reduces stress and confusion later.
Final Thoughts
A step-up in basis may not be a topic that comes up around the dinner table, but it is one of the most valuable tax benefits available to families who inherit property. For homeowners throughout Chicago and the South Suburbs who purchased their homes decades ago, the potential savings can be substantial.
Understanding how a step-up in basis works helps families avoid unnecessary taxes, make informed decisions about inherited property, and move forward with greater confidence.
My goal is simple. I want to make sure you feel informed, empowered, and supported at every stage of this process. That is why I put together a free resource library packed with guides covering everything from downsizing and aging in place to senior living options and financial planning. And if you would like to understand more about what an SRES® does and why it matters for homeowners over 50, the Homeowners 50+ page is a good place to start.
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Disclaimer: This article is provided for general informational purposes only and should not be considered legal, financial, tax, estate planning, or real estate advice. Every family’s situation is unique. Before making decisions regarding an inherited property, probate, taxes, estate planning, or the sale of real estate, consult with a qualified attorney, CPA, financial advisor, or other appropriate professional regarding your specific circumstances.
If you’re starting to think about what comes next, you don’t have to figure it out on your own. Sometimes it helps just to talk things through.
You can always take the next step at your own pace, with no pressure and no expectations. I’m always happy to help you get a clearer picture of your options.
Michelle Williams is a REALTOR® and SRES® serving Chicago and the South Suburbs, helping homeowners 50+ make confident decisions about their next move.