Section 645 Election Explained: Tax Benefits for Revocable Trusts After Death
A revocable living trust often holds most or all of a person's investment accounts, real estate, business interests, and other property at death. Although the trust may avoid probate, it normally becomes a separate taxpayer after the trust owner dies. That can create a separate federal fiduciary income tax return in addition to any return required for the decedent's estate.
A Section 645 election can simplify this structure. The election allows a qualified revocable trust to be treated and taxed as part of the decedent's estate for federal income tax purposes during a limited election period. In practical terms, the trust can temporarily file under many of the income tax rules that apply to an estate.
Key point: A Section 645 election does not convert the trust into a probate estate, change legal ownership of the trust assets, or eliminate the trustee's fiduciary responsibilities. It changes the trust's federal income tax treatment during the election period.
What Is a Section 645 Election?
IRC §645 allows the executor of an estate and the trustee of a qualified revocable trust to elect to treat the trust as part of the related estate for federal income tax purposes. The election is made by filing Form 8855, Election To Treat a Qualified Revocable Trust as Part of an Estate.
When an executor has been appointed, the executor generally files one Form 1041 that reports the combined income, deductions, and credits of the estate and each electing trust. The return is filed using the estate's name and taxpayer identification number.
The election is also available when no executor has been appointed. In that situation, the trustee, or a designated filing trustee when there is more than one electing trust, files Form 1041 as though the trust were an estate.
Which Trusts Qualify?
The election is limited to a qualified revocable trust, commonly referred to as a QRT. A QRT is a trust, or a portion of a trust, that was treated as owned by the decedent under IRC §676 on the date of death because the decedent held a power to revoke the trust.
A typical revocable living trust created and controlled by the decedent will usually satisfy this definition. A trust does not qualify merely because it received property from the decedent. The trust must have been treated as owned by the decedent under the specific revocation rules before death.
Why Can the Election Be Valuable?
One Combined Form 1041
When both an estate and an electing trust exist, one combined Form 1041 can reduce duplicate reporting, separate tax calculations, and administrative coordination. This can be particularly useful when the probate estate holds only a small amount of property and most of the decedent's assets were titled in the revocable trust.
The estate and trust must still maintain adequate separate records. The regulations require the executor and trustee to agree on an allocation of the combined tax burden that reasonably reflects the tax obligations attributable to each entity.
Fiscal Year Flexibility
A trust generally uses a calendar tax year. An estate may select a fiscal year ending on the last day of a month, provided the first tax year does not exceed twelve months.
During the Section 645 election period, an electing trust may receive estate treatment for purposes of selecting its tax year. A properly selected fiscal year can better align the income tax filing cycle with the administration of the estate and trust.
Estimated Tax Treatment
The election allows the electing trust to receive the estate estimated tax treatment described in IRC §6654(l)(2). This includes the two year exception that can relieve a decedent's estate from the requirement to make estimated income tax payments during the applicable period.
Charitable Set Aside Deduction
An estate may qualify for a charitable deduction under IRC §642(c)(2) for gross income that is permanently set aside for a qualifying charitable purpose. A trust generally cannot use the same set aside provision.
During the election period, an electing trust is treated as part of the estate for this purpose. The governing instrument, source of the payment, and other statutory requirements must still support the deduction.
S Corporation Shareholder Treatment
The election can also affect whether the trust is treated as an eligible S corporation shareholder. During the election period, the electing trust is treated as part of the estate for purposes of the S corporation shareholder requirements under IRC §1361.
This issue requires careful review when the revocable trust owns stock in an S corporation. An ineligible shareholder can terminate an S election, so the trust's status and the expiration of the Section 645 election period should be monitored.
Rental Real Estate Special Allowance
An electing trust may also receive estate treatment under the special rental real estate allowance rules in IRC §469(i)(4). The availability and amount of any passive loss allowance will depend on the decedent's participation, the timing after death, and the other requirements of the passive activity rules.
| Without a Section 645 Election | With a Section 645 Election |
|---|---|
| The estate and trust may file separate Forms 1041. | The estate and electing trust generally file one combined Form 1041 when an executor exists. |
| The trust generally uses a calendar tax year. | The electing trust may receive estate treatment when selecting a fiscal year. |
| The trust follows the estimated tax rules generally applicable to trusts. | The estate estimated tax exception may apply during the eligible period. |
| The trust generally cannot claim an estate charitable set aside deduction. | The electing trust may qualify for the deduction if all statutory requirements are satisfied. |
How Is the Election Made?
The election is made on Form 8855. If an executor has been appointed, the executor and the trustee of each qualified revocable trust joining the election generally sign the form.
If no executor has been appointed and one is not expected to be appointed, the trustee may make the election. When several qualified revocable trusts are joining the election, the trustees designate one filing trustee to file the combined returns.
Each qualified revocable trust must obtain a new employer identification number after the decedent's death, regardless of whether a Section 645 election will be made. The decedent's Social Security number should no longer be used to report the trust's income after death.
Once made, the Section 645 election is irrevocable. The executor and trustee should therefore evaluate the expected administration period, income sources, beneficiaries, charitable provisions, S corporation interests, and state tax consequences before filing Form 8855.
What Is the Filing Deadline?
Form 8855 is generally due by the due date, including an approved extension, of the first Form 1041 for the related estate. If there is no executor, the deadline is determined using the first tax year of the filing trust, treating that trust as an estate.
The deadline applies even when the estate and trust do not have enough income to otherwise require the filing of Form 1041. Waiting until a later year to consider the election can therefore result in the election opportunity being lost.
If a filing trustee makes the election because no executor has been appointed, and an executor is later appointed, the executor must agree to the election for it to continue. An amended Form 8855 generally must be filed within 90 days after the executor's appointment.
How Long Does the Election Last?
The election period begins on the date of the decedent's death. It generally ends on the earlier of the following dates:
- The date on which the electing trust and the related estate have distributed all of their assets.
- The day before the applicable statutory termination date.
If no Form 706 estate tax return is required, the applicable date is generally two years after the date of death.
If Form 706 is required, the applicable date is generally the later of two years after death or six months after the final determination of the federal estate tax liability.
The election does not continue indefinitely, and it does not automatically apply to successor trusts that receive distributions under the trust instrument. The trustee should plan for the income tax reporting transition when the election period ends.
What the Election Does Not Eliminate
A combined income tax return does not eliminate the need for separate fiduciary accounting. The executor and trustee must continue to identify which income, deductions, distributions, expenses, and tax payments belong to the estate and which belong to the trust.
The estate and each electing trust are generally treated as separate shares when distributable net income is calculated and the beneficiary distribution rules are applied. A combined return therefore does not permit income and deductions to be shifted freely between the estate and trust.
The election also does not determine the treatment of every item for state income tax purposes. State conformity, residency, situs, and fiduciary filing requirements should be reviewed separately.
When Should the Election Be Considered?
The election may be particularly useful when:
- Most of the decedent's assets were held in a revocable living trust.
- A probate estate also exists and separate returns would create unnecessary duplication.
- A fiscal tax year would improve the administration and reporting cycle.
- The trust owns S corporation stock.
- The trust instrument contains charitable provisions.
- The trust holds rental real estate with passive activity considerations.
- The trustee expects the administration to be completed within the election period.
The election may offer less value when the trust and estate have materially different beneficiaries, complicated separate share calculations, conflicting distribution provisions, or significant state tax differences. It may also be unnecessary when the trust has little income and no estate return would otherwise be required.
Final Takeaway
A Section 645 election can provide meaningful administrative and income tax benefits after the death of a revocable trust owner. It can permit combined Form 1041 reporting, fiscal year flexibility, estate estimated tax treatment, charitable set aside treatment, and selected estate rules affecting S corporation stock and rental real estate.
The election is time sensitive and irrevocable. Executors and trustees should analyze it before filing the first fiduciary income tax return and should document how the combined tax liability will be allocated between the estate and trust.
Section 645 is longstanding law under Subchapter J of the Internal Revenue Code. It was not created or materially changed by the One Big Beautiful Bill Act.
