Interest on Exchange Funds: The QI Rules Most Advisors Overlook

The Interest Question Nobody Asks Until It's Too Late

When a property closes and exchange proceeds land with a qualified intermediary, most attention rightly focuses on the 45-day identification window and the 180-day exchange period. But there is a quieter compliance question sitting underneath all of that: what happens to the interest those funds earn while they sit?

It sounds like a footnote. It is not. For high-volume QIs, family offices managing multiple simultaneous exchanges, and wealth advisors whose clients are parking seven-figure proceeds, the handling of interest touches IRS rules, state law, fiduciary expectations, and the client relationship itself. Getting it wrong does not just create awkward conversations — it can create taxable events and regulatory exposure.

What the Treasury Regulations Actually Say

The foundational authority here is Treasury Regulation §1.1031(k)-1, which governs deferred exchanges and defines the qualified intermediary safe harbor. The regulation is explicit on one point: exchange proceeds held by a QI are not considered to be in the taxpayer's actual or constructive receipt — so long as the agreement restricts the taxpayer's rights to receive, pledge, borrow, or otherwise obtain the benefits of the money before the exchange period ends.

That restriction is critical. The moment a taxpayer can freely access funds — including interest accrued on those funds — the safe harbor begins to erode. The IRS has historically viewed unrestricted access to interest as a potential constructive receipt problem, particularly if the exchange agreement is loosely drafted.

On the tax treatment of interest itself, the rule is straightforward: interest or growth earned on exchange proceeds is taxable to the exchanger as ordinary income in the year it is received, regardless of whether the underlying exchange qualifies under Section 1031. The interest does not become part of the exchange proceeds for purposes of calculating boot or realized gain. It sits outside the 1031 framework entirely. This means that even a perfectly executed exchange does not shelter the interest component from tax.

Segregated Accounts: Structure Matters More Than Intent

A QI's obligation to segregate client funds is not merely a best practice — it is, in many states, a statutory requirement. Several states with QI licensing or registration frameworks (including California, Nevada, Oregon, Washington, and Nevada) mandate that exchange funds be held in segregated, separately titled accounts and not commingled with the QI's operating capital.

Even in states without explicit statutory language, commingling creates serious problems:

• Constructive receipt risk: Commingled accounts can blur the line between QI funds and client funds, potentially undermining the independence the safe harbor requires.
• Insolvency exposure: If a QI becomes insolvent, commingled client funds may be treated as general assets of the QI estate, leaving exchangers as unsecured creditors.
• Audit vulnerability: The IRS expects clean documentation that exchange proceeds remained separate and under QI control throughout the exchange period. Commingled accounts make that documentation harder to produce.

Best-practice QIs maintain individually titled or sub-accounted segregated accounts for each exchange, typically at FDIC-insured institutions. Some use qualified escrow accounts or qualified trust structures as an additional layer of protection — both of which are explicitly recognized in the Treasury Regulations as safe harbor vehicles.

How the Exchange Agreement Should Address Interest

The exchange agreement between the QI and the exchanger is where interest rights are contractually established. This document needs to be precise on several points that are easy to leave vague:

1. Who earns the interest: The agreement should clearly state that any interest, earnings, or investment returns on the exchange account accrue to the benefit of the exchanger, not the QI — unless the parties have explicitly agreed otherwise (some QIs retain a portion as a fee structure, which must be disclosed).
2. When interest is distributed: Interest should generally be distributed at or after closing of the replacement property, not during the exchange period, to avoid constructive receipt arguments. Distributing interest mid-exchange invites scrutiny.
3. Tax reporting obligations: The agreement should acknowledge that interest will be reported to the IRS on Form 1099-INT in the exchanger's name and taxpayer identification number. The QI should be collecting a W-9 at the outset of every engagement.
4. Investment discretion: If the QI has discretion over how funds are invested during the exchange period — for example, placing funds in money market accounts or short-term Treasuries — that discretion and its limits should be documented.

Advisors reviewing exchange agreements on behalf of clients should flag any agreement that is silent on these points. Silence is not neutral; it creates ambiguity that rarely resolves in the exchanger's favor.

Practical Considerations for High-Value Exchanges

For exchanges involving proceeds above $250,000 — a threshold increasingly common in commercial and multifamily transactions — the interest earned during a 180-day exchange period is not trivial. At current short-term rates, a $2 million exchange could generate $15,000 to $25,000 in interest income depending on placement. That is real ordinary income that needs to appear on the exchanger's return.

Wealth advisors should proactively brief clients on this before closing the relinquished property, so there is no surprise at tax time. A client who expects their entire proceeds to roll forward tax-deferred and then receives a 1099-INT in January has a legitimate grievance — not with the tax law, but with the communication.

QIs, for their part, should have documented procedures for timely 1099 issuance, reconciled account statements for each exchange file, and clear internal controls showing that segregation was maintained throughout the exchange period. These are the records that matter in an audit or a dispute.

The Bottom Line

Interest on exchange proceeds is a small piece of the 1031 puzzle, but it is one where sloppy practice creates disproportionate risk. Clear exchange agreements, properly segregated accounts, accurate 1099 reporting, and proactive client communication are the non-negotiables. For QIs building a durable, professional practice — and for advisors selecting a QI partner — these details are a reliable signal of overall operational quality.

Disclaimer: This article is for informational purposes only and does not constitute legal, tax, or financial advice. Readers should consult a qualified attorney or tax professional regarding their specific circumstances.