Enter the date of death: get the 9-month Form 706 due date, the Form 4768 extended date, the earliest Pay.gov closing-letter request date, the five-year late-portability window, and the 2026 $15,000,000 exclusion math - in the browser tab you already have open.
| Basic exclusion for the year of death | — | USD |
|---|---|---|
| Exclusion + DSUE available | — | USD |
| Taxable estate after deductions | — | USD |
| Estimated federal estate tax (40% of the excess) | — | USD |
| Form 706 due (9 months, IRC 6075(a)) | — | |
| Extended due date (Form 4768) | — | |
| Days left to the operative deadline | — | days |
| Earliest closing-letter request (Pay.gov, $56) | — | |
| Late portability window closes (Rev. Proc. 2022-32) | — | |
| Month-one failure-to-file addition (IRC 6651(a)(1)) | — | USD |
This page is the working piece. The full pack has everything below.
Enter the date of death: get the 9-month Form 706 due date, the Form 4768 extended date, the earliest Pay.gov closing-letter request date, the five-year late-portability window, and the 2026
Form 706 prep starts near $2,500, estate CPAs bill $150-$400/hr, and the IRS closing letter is a $56 Pay.gov fee (T.D. 10031).
Buy the full version — $60You type a date of death, a gross estate figure and the date Form 706 was filed. It returns the nine-month Form 706 due date under IRC 6075(a), the six-month Form 4768 extended date, the earliest date you may order the IRS closing letter on Pay.gov, the five-year late-portability anniversary, the year-of-death basic exclusion, and the estimated tax at the 40 percent top rate.
US estate attorneys, trust officers, fiduciary CPAs and individual executors who are administering a decedent's estate in 2026 and need the federal filing calendar for that particular death date. It is written for the person who has the date of death in front of them and has to put four dates in a file, not for general estate planning.
A generic date calculator does not know the 2026 basic exclusion is $15,000,000. Models trained before the One Big Beautiful Bill Act was signed in July 2025 still repeat the repealed sunset of roughly seven million dollars, which flips whether an estate owes tax at all. This tool holds the year-of-death figure from Rev. Proc. 2025-32 and shows its arithmetic.
Everything the calculator computes is free with no key, no limit and no watermark, in the popup and on the free web page. The $60 key unlocks two different things, not more calculation: exporting the dated checklist as a .csv you can file, and Chrome alarms that fire ahead of each deadline after the tab is closed.
Preparing a Form 706 starts around $2,500 and estate CPAs bill roughly $150 to $400 an hour, so re-deriving a filing calendar by hand is billable time. The IRS closing letter is a separate $56 Pay.gov user fee set by T.D. 10031 in May 2025, and it is wasted if the request is filed before the nine-month wait is up.
No. The calculation runs entirely in your browser tab; nothing about the decedent, the estate value or the dates leaves the machine. The only outbound request the extension ever makes is a licence-key check against api.polar.sh when you use the paid export or alarm features, and that request carries the key and nothing else.
One question, answered by the person who built it. Your email only if you want the answer sent.