When a trust holds rental property and a stock portfolio, two different people may have rights to what it produces. One receives what the assets earn — the rent, the dividends, the interest. Another eventually receives the assets themselves. The principal and income distinction separates those two interests.
What the distinction means
Principal is what the trust owns. Income is what the trust earns from owning it.
A rental property in a trust is principal; the rent it generates each month is income. A portfolio of stocks is principal; the dividends those stocks pay are income. When the trustee sells the property or the stocks, the proceeds — including any appreciation — generally return to principal.
The separation becomes consequential when the beneficiaries are different people. A surviving spouse may be entitled to income from her late husband’s trust for the rest of her life, while his children from a prior marriage receive the principal when she dies. This structure appears routinely in QTIP trusts.
A structure this precise raises a natural question — why not simply divide the assets outright? Grantors generally have a few common motivations:
- Control over where assets ultimately land after the surviving spouse dies
- Estate tax benefits
- Limiting the surviving spouse’s exposure to creditors
- Ensuring long-term financial stability for beneficiaries who may not be equipped to manage a lump sum
Real estate: one property, two ledgers
Rental property requires more ongoing allocation decisions than most other trust assets. Monthly rent is income. Nearly everything else requires analysis.
A trust owns a duplex generating $2,400 monthly. The furnace requires replacement at a cost of $8,000. Replacing an entire HVAC system is a capital improvement paid from principal.
The same property needs exterior painting for $4,500. Routine maintenance charges to income.
The IRS applies the same framework that trust accounting does — repairs restore, improvements capitalize. A few common examples:
- New roof → principal
- Patching a leak → income
- Replacing all windows → principal
- Replacing a broken pane → income
- Property taxes, insurance, landscaping, ordinary upkeep → income
Ex: A grantor leaves a four-unit rental property in trust. A nephew who helped manage the property for years is entitled to the rental income for his lifetime. The grantor’s two adult children receive the property itself when the nephew dies. The nephew receives what the building earns. The children receive the building.
Nephew income trust — one month
Income accounting
|
Transaction |
Amount |
|
Rental income |
$4,800 |
|
Property management fee |
-$480 |
|
Property taxes |
-$620 |
|
Insurance |
-$210 |
|
Plumbing repair |
-$340 |
|
Net income |
$3,150 |
Principal accounting
|
Transaction |
Amount |
|
Exterior staircase replacement |
-$6,200 |
|
Net principal |
-$6,200 |
The nephew receives $3,150 that month. The staircase replacement — a capital improvement — comes from principal. The children’s eventual inheritance absorbed that cost, not the nephew’s distribution.
Ex: A trust holds a commercial office building. The grantor’s two adult children are both income and remainder beneficiaries — they receive the monthly distributions now and the building itself when the trust terminates. Even when the same people benefit from both sides, the principal and income separation still matters. Routine expenses code to the income class. Capital improvements code to the principal class.
Office building — one month
Income accounting
|
Transaction |
Amount |
|
Rental income |
$84,000 |
|
Property taxes |
-$12,000 |
|
Insurance premiums |
-$4,800 |
|
Landscaping & snow removal |
-$3,600 |
|
Entrance door repair |
-$800 |
|
Interior painting |
-$5,200 |
|
Net income |
$57,600 |
Principal accounting
|
Transaction |
Amount |
|
Parking lot resurface & repair |
-$28,000 |
|
Net principal |
-$28,000 |
Stocks: what the trust receives and where it goes
Regular cash dividends go to income. Unrealized gains and losses — the daily fluctuation in what a stock portfolio is worth — are a principal matter, but they do not generate a transaction until shares are sold.
When shares are sold, the proceeds return to principal. What happens to the gain at that point depends on the trust structure; in many common trust arrangements, capital gains are treated as principal rather than income, though this varies by trust document and state law. The quick reference below reflects the most common defaults.
- Regular cash dividends → income
- True stock dividends (new shares issued instead of cash) → principal
- Stock splits → principal
- Special or extraordinary dividends → principal
- Capital gains from selling stock → principal
Ex: A trust holds $500,000 in dividend-producing stocks and Treasury bills for a surviving spouse, with quarterly distributions intended to support her living costs. The stock portfolio generates approximately 5% annually in dividends; the Treasury bills contribute additional interest income.
Surviving spouse trust — one quarter
Income accounting
|
Transaction |
Amount |
|
Stock dividends |
$5,200 |
|
Treasury bill interest |
$1,100 |
|
Trustee fee (income portion) |
-$300 |
|
Net income |
$6,000 |
The $6,000 distributes to the surviving spouse that quarter. No principal transactions occurred — the stocks and Treasury bills simply generated income while remaining in principal intact. Unrealized gains and losses affect the value of what the children will eventually receive but do not generate a transaction until a sale occurs.
This can create tension in modern portfolio management. A growth-oriented portfolio may appreciate substantially while generating modest cash income. Some trust documents address this through unitrust provisions, distributing a fixed percentage of total trust value annually rather than traditional income alone. Either approach requires consistent application year over year.
Interest income
Interest earned on bank accounts, bonds, certificates of deposit, and money market funds goes to income. A trust holding $200,000 in bonds paying 4% annually receives $8,000 that flows to the income beneficiary. When the bonds mature and the $200,000 returns, it stays in principal.
Expenses: the split that depends on state
Trustee compensation and investment advisory fees are commonly split between principal and income, but the specific allocation varies by state. The trust document governs in each case, and state law fills the gaps when the document is silent.
How accounting software tracks the separation
Accounting software such as QuickBooks maintains the principal and income separation through class coding. Two classes — “Principal” and “Income” — are created, and each transaction receives one designation. A Profit & Loss filtered by class produces two separate ledgers.
Family Trust — one month
Income accounting
|
Transaction |
Amount |
|
Rental income |
$3,000 |
|
Property management fee |
-$300 |
|
Property tax |
-$800 |
|
Stock dividends |
$2,000 |
|
Net income |
$3,300 |
Principal accounting
|
Transaction |
Amount |
|
New HVAC system |
-$7,500 |
|
Investment advisory fee |
-$600 |
|
Net principal |
-$8,100 |
The income class report shows $5,000 in receipts, $1,700 in expenses, and $3,300 available for distribution. The principal class report shows the HVAC cost and the advisory fee allocation — a clear record of how principal changed that month. Unusual transactions are worth noting contemporaneously — what the decision was and the reasoning behind it.
How the accounting gets used
Trustees are generally required to provide beneficiaries with an annual accounting showing receipts and disbursements of principal and income separately. The books maintained throughout the year are what that accounting draws from. When the separation between principal and income has been tracked consistently, producing the annual accounting is straightforward. When it hasn’t, reconstructing a year’s worth of allocation decisions is a significantly harder task.
A trustee who is also a remainder beneficiary making allocation decisions that affect the income beneficiary presents a conflict of interest — one that clean, contemporaneous records help address by showing the basis for each decision at the time it was made.
This newsletter is intended for general informational purposes and is not a substitute for legal or tax advice. For guidance specific to your situation, an attorney or CPA is the right resource.
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