The IRS publishes estate tax data by filing year and for selected years of death. Those tables describe different populations. A return filed in one calendar year can relate to a person who died in an earlier year, so filing-year totals should not be presented as a count of deaths in that year.
Estate tax filing year versus year of death
Every statistic should carry its classification. Record whether the number is a filing-year count or a year-of-death count, the table title, the year, the unit, and the access date. The distinction matters when a team compares estate activity across periods.
| Question | Correct table label |
|---|---|
| How many returns were filed during a calendar year? | Filing year |
| How many returns are associated with deaths in a selected year? | Year of death |
| How many probate cases were opened? | Neither IRS table answers this |
| Which parcel belongs to an estate? | Matter-level property records |
The Form 706 composition guide explains what the IRS study includes. The IRS estate tax metadata guide provides a short checklist for table notes.
What not to infer
Do not divide filing-year returns by deaths, call the result a probate rate, or use the table as a property inventory. The IRS describes its estate tax data as compiled from Form 706 and provides separate links for filing-year and year-of-death tables.
Source and limitation
- Internal Revenue Service, SOI tax stats estate tax statistics, accessed August 10, 2026.
The figures are tax-study populations. They are not a national probate or estate-property series.
**Professional disclaimer:** This is general research, not legal, tax, probate, or fiduciary advice.