Specialized Returns and Taxpayers · Trust and estate income tax

Distributable net income and accounting income

Two figures with confusingly similar names do quite different work. Fiduciary accounting income is a trust law figure that tells the trustee what may be paid out. Distributable net income is a tax figure that limits the trust’s deduction and the beneficiaries’ income. A return needs both, and they are rarely the same number.

The rule

Accounting income comes from the instrument, not the Code. income, where not preceded by "taxable", "distributable net", "undistributed net" or "gross", means the amount of income of the estate or trust for the year determined under the terms of the governing instrument and applicable local law^TY2026 (IRC § 643(b)), with items of gross income constituting extraordinary dividends or taxable stock dividends that the fiduciary, acting in good faith, determines to be allocable to corpus under the instrument and local law are not income for this purpose^TY2026.

Distributable net income is a modified taxable income. distributable net income is the taxable income of the estate or trust with modifications — no distribution deduction, no personal exemption, capital gains allocated to corpus excluded, tax-exempt interest added back net of allocable expenses, and the IRC § 1202 exclusion disregarded^TY2026 (IRC § 643(a)). Two modifications carry most of the weight:

• Capital gains. gains from the sale or exchange of capital assets are excluded to the extent allocated to corpus and neither paid, credited nor required to be distributed to a beneficiary during the year, nor set aside for charitable purposes — so capital gain normally stays with the trust and is taxed to it^TY2026 (IRC § 643(a)(3)).
• Tax-exempt interest. tax-exempt interest is included in distributable net income, reduced by the disallowed expenses allocable to it — so the ceiling on the distribution deduction reflects economic income, while the deduction itself is then reduced for the exempt portion^TY2026 (IRC § 643(a)(5)).

It caps the deduction. For a simple trust, where the income required to be distributed currently exceeds distributable net income, the IRC § 651 deduction is limited to distributable net income — computed for this purpose without items excluded from the trust’s gross income and the deductions allocable to them^TY2026 (IRC § 651(b)). For a complex trust or an estate, a complex trust or estate deducts the income required to be distributed currently plus any other amounts properly paid, credited or required to be distributed for the year — but not more than distributable net income^TY2026 (IRC § 661(a)).

And it caps and characterises the beneficiary’s income. The beneficiary of a simple trust includes the income required to be distributed, limited to distributable net income (IRC § 652(a)); the beneficiary of a complex trust or estate includes amounts under the two-tier system in IRC § 662(a). Either way, the amount distributed is treated as consisting of the same proportion of each class of item entering into distributable net income as that class bears to the total — so character flows through pro rata unless the instrument or local law specifically allocates otherwise^TY2026 (IRC § 661(b); IRC § 652(b)).

Current figures

How it works in practice

Compute accounting income from the instrument and local law, and only then look at the Code. The trustee’s duty to distribute is measured in accounting income: what the instrument calls income, supplemented by the state’s principal and income act where the instrument is silent. That figure decides how much cash leaves the trust. It does not decide anything about tax.

Then compute distributable net income as a modified taxable income. Start with taxable income, add back the distribution deduction and the exemption, take out capital gains allocated to corpus, and add tax-exempt interest net of the expenses IRC § 265 disallowed against it. What remains is the ceiling on the deduction and on the beneficiaries’ inclusion.

The capital gain rule is the one that surprises. Under IRC § 643(a)(3) gains allocated to corpus are excluded from distributable net income, so they are taxed to the trust at the compressed fiduciary rates even in a year when the trust distributed everything it could. That is why capital gain is usually the largest item on a fiduciary return and why the instrument’s treatment of gains matters so much.

Tax-exempt interest goes into distributable net income and then comes out of the deduction. It is added by IRC § 643(a)(5) so that the ceiling reflects what the trust economically has, and the distribution deduction is then reduced by the exempt portion so that the exemption is not converted into a deduction. The beneficiary receives the exempt character through IRC § 652(b) or § 662(b).

Character flows pro rata unless something specific overrides it. A distribution consisting of a single cheque is treated as carrying the same proportion of each class of income as that class bears to distributable net income. So a beneficiary receiving one payment from a trust with interest, dividends and tax-exempt income reports all three in proportion — the trustee cannot choose to distribute only the taxable items.

Do not expect the two figures to match. They are computed on different bases and from different sources: accounting income excludes capital gains that distributable net income sometimes includes, includes items the Code excludes, and follows a state statute rather than the Code. A trust can have substantial accounting income and almost no distributable net income, or the reverse.

Scenarios

Traps

How this has changed

The subchapter J architecture has been stable since 1954, and IRC § 643 has been amended only at the edges. What has changed around it is the rate structure. When the provisions were written, trust brackets were wide and accumulating income inside a trust was a genuine planning choice; the compression of the brackets after 1986 means a trust reaches the top rate at a few thousand dollars of income, so the practical question in every fiduciary return is now how much can be pushed out to beneficiaries rather than whether to accumulate.

Two later provisions sharpened that. The IRC § 1411 net investment income tax applies to a trust at the same low threshold, so undistributed investment income bears it while the same income in a beneficiary’s hands often does not. And the suspension of miscellaneous itemized deductions removed much of what trusts used to deduct, though IRC § 67(e) preserves deductions for costs paid or incurred in connection with the administration of an estate or trust that would not have been incurred if the property were not held in one.

The state principal and income acts have moved more than the Code. Most states have adopted a version of the Uniform Principal and Income Act permitting the trustee to adjust between principal and income, or to use a unitrust percentage — which changes accounting income directly, and so changes what must be distributed, without touching distributable net income at all.

Exam focus

State both definitions precisely and be able to say which question each answers. Accounting income: instrument and local law, what may be distributed. Distributable net income: modified taxable income, the ceiling on deduction and inclusion.

Memorise the IRC § 643(a) modifications in order — no distribution deduction, no exemption, capital gains allocated to corpus excluded, extraordinary dividends excluded for simple trusts, tax-exempt interest added net of allocable expenses, and the IRC § 1202 exclusion disregarded.

Know that capital gain allocated to corpus is taxed to the trust, and be ready to explain why the distribution of all accounting income does not change that.

Know the deduction caps: IRC § 651(b) for a simple trust and the closing words of IRC § 661(a) for a complex trust or estate.

Finally, know that character flows pro rata under IRC §§ 652(b) and 661(b), and that only a specific allocation with independent economic effect displaces it.

Check yourself

1. A simple trust has $40,000 of taxable interest, $10,000 of tax-exempt interest, and $2,000 of trustee fees allocable between them. What is distributable net income, and what is the distribution deduction?

Answer: Distributable net income is about $48,400 — taxable income modified by adding back the distribution deduction and the exemption, and by including the tax-exempt interest net of the expenses allocable to it under IRC § 643(a)(5), so $10,000 less the fifth of the fees attributable to it. The distribution deduction is then reduced by the net tax-exempt amount, because the trust cannot deduct amounts attributable to income it never included. The beneficiary includes the taxable portion and receives the exempt portion with its character intact.

2. A complex trust has accounting income of $70,000, distributable net income of $52,000, and distributes $95,000 to its sole beneficiary. What does each party report?

Answer: The trust deducts $52,000. IRC § 661(a) allows the income required to be distributed currently plus other amounts properly paid, but caps the deduction at distributable net income. The beneficiary includes $52,000 under IRC § 662(a), with character allocated pro rata under § 662(b). The remaining $43,000 is a distribution of corpus, carrying no income to the beneficiary and no deduction to the trust. Distributing more cash than distributable net income never creates a larger deduction.

3. Why does a trust that distributed every dollar it received still pay tax on its capital gain?

Answer: Because IRC § 643(a)(3) excludes from distributable net income gains from the sale or exchange of capital assets to the extent they are allocated to corpus and are not paid, credited or required to be distributed to a beneficiary during the year, nor set aside for charitable purposes. The distribution deduction cannot exceed distributable net income, so a gain outside that figure cannot be deducted however much cash left the trust. The gain is taxed to the trust at the compressed fiduciary rates, which is why it usually dominates the return.

4. A trustee wishes a beneficiary to receive only the trust’s qualified dividends and issues a cheque described as a distribution of the dividend account. Does that work?

Answer: No. IRC § 661(b) — and § 652(b) for a simple trust — treats the amount distributed as consisting of the same proportion of each class of item entering into distributable net income as that class bears to the total, so the beneficiary reports a pro rata slice of every class. The account the cheque was drawn on is irrelevant. Only a specific allocation required by the governing instrument or by local law, and having economic effect independent of the tax consequences, can displace the proportionate rule.

5. Why can accounting income exceed distributable net income even where nothing is allocated to corpus?

Answer: Because they are computed from different sources and admit different deductions. Accounting income follows the instrument and the state principal and income act, which may not require a depreciation reserve, may treat certain receipts as income that the Code does not, and takes no account of Code-only deductions. Distributable net income starts from taxable income, which is reduced by depreciation, depletion and administration expenses. A rental trust is the standard example: the trustee must distribute the full rents as accounting income while distributable net income is the rents less depreciation, so the beneficiary receives more cash than income.