When someone passes away, everything they owned—whether it’s real estate, stocks, a business, or even personal belongings—needs a proper valuation. This step, called estate tax valuation, matters because it shapes how much estate tax the government expects. The IRS wants exact numbers, so it’s crucial for executors and beneficiaries to know how this process works.

Fair Market Value—What It Means

The IRS bases everything on “fair market value.” That’s basically the price an item would sell for if both buyer and seller are informed, willing, and not desperate to make the deal. It doesn’t matter what the person originally paid, and it’s definitely not about sentimental value. It’s about what someone would actually pay, in the real market, on the day that person died.

How Appraisals Work

A lot of assets need professional appraisers. Take real estate—the value usually comes from a certified appraiser comparing similar homes in the same location. With more complicated stuff, like private businesses, you really need an expert. These analysts dig into financial details and run models, sometimes applying discounts for things like lack of marketability or owning just a small share. These discounts often draw IRS scrutiny, so keeping detailed documentation is critical if you want to avoid trouble later.

Date of Death or Six Months Later?

Timing matters, too. By default, assets get valued as of the day the person died. But sometimes, the law lets you choose an alternate date—specifically, six months after the date of death. If the estate’s value drops significantly in that time, this option can lower the taxes owed. Still, you have to apply this alternate date to the entire estate, not just cherry-pick certain assets.

Why Documentation Is So Important

The IRS expects clear evidence for every value listed. You can’t offer up a guess or pick a number that feels right. If they review your filing and the numbers aren’t backed up, that’s a problem. So, you have to save everything: appraisal reports, brokerage statements, explanations for any discounts. Good records are your main defense, showing you valued everything honestly and by the rules.

Dealing with estate tax valuation isn't simple—you need to pay close attention to detail and often rely on professionals. But if executors stick to the fair market value standard and keep thorough documentation, they can satisfy federal requirements and help prevent headaches down the line.