The seven deadly sins are the operational limits a DST must follow to keep its 1031 tax treatment. They restrict how a sponsor can manage the property, and knowing them sets realistic expectations for how a DST actually operates.
Where the seven rules come from
Break one of these seven rules and every investor in the deal can lose their tax deferral at once - not just the sponsor who slipped, but everyone in the trust.
The rules come from Revenue Ruling 2004-86, which made DSTs eligible for 1031 exchanges - the tax deferral investors get by swapping one like-kind property for another - on a single condition: the DST had to operate as a passive investment vehicle, not an actively managed fund. To hold that line, the IRS wrote seven operational restrictions. The industry calls them the "seven deadly sins," because violating any one can jeopardize the DST's 1031 eligibility for everyone in it.
These are not guidelines. They are structural requirements written into every compliant DST's governing documents.
1. No new capital after the offering closes
Once a DST closes its offering, the capital is fixed. The sponsor can't call investors for more, and no new investor can buy in. If fresh money could enter, existing investors' fractional stakes would dilute and the ownership interest could stop qualifying as a fixed share of real property, which is exactly what the IRS is protecting.
That puts all the weight on reserves. The sponsor has to set aside enough at closing to cover every anticipated expense, repair, and contingency for the full hold period, because if the reserve runs dry there is no going back for more. The property may underperform, or absorb the kind of cost-cutting a direct owner could avoid by simply writing another check. Ask how the reserve was calculated, what scenarios it covers, and how large it is as a percentage of the property's assessed replacement cost. A sponsor who hasn't stress-tested those numbers is taking a risk with your capital.
2. No new borrowing or refinancing
The DST's financing is locked at closing. The sponsor can't refinance, renegotiate loan terms, take on new debt, or modify the existing mortgage. Any change to the debt would change the economics of every investor's beneficial interest, and the IRS wants those interests fixed, traceable, and passive.
The practical effect: if rates drop, the DST can't refinance to capture the savings; if the property's equity position improves, the sponsor can't borrow against it; and if the loan matures before the hold period ends, the options are limited. The financing terms in the offering document, or PPM, are the financing terms for the life of the investment. So the loan deserves a close read - fixed rate or variable, and whether it comes due before the projected exit. A variable-rate loan in a rising-rate market, with no ability to refinance, is where this restriction turns into real cash flow risk.
3. No reinvesting sale proceeds
If a property in the DST is sold during the hold period, the proceeds go straight to investors. They can't be rolled into a replacement property. Reinvesting would turn the DST into an active acquisition vehicle rather than a passive holder of specified property, and the IRS draws a hard line between holding property and trading it.
That makes the DST a static pool: no rotation, no opportunistic buying, no reinvestment strategy. If the sponsor sells early, after a casualty, a tenant default, or an opportunistic offer, the money lands in your account as a distribution and can trigger a taxable event you weren't expecting. If the DST holds more than one property, it's worth understanding what happens when a single asset is sold on its own: whether it triggers a partial distribution, and how it reshapes the economics of what's left.
4. No leasing beyond the pre-set terms
The DST can't sign new leases or renegotiate existing ones outside the parameters set in the offering documents. Active lease negotiation is active management, so sticking to a predetermined framework is what keeps the deal passive in the IRS's eyes.
If a major tenant leaves, then, the sponsor can re-lease only within the pre-set boundaries: approved rent ranges, lease term limits, tenant qualification criteria. If the market has moved and those terms are no longer competitive, the space can sit vacant rather than take a tenant on terms outside the plan. Look at the tenant base and the lease expiration schedule. A property leased long-term to creditworthy tenants is far less exposed here than one with leases rolling off during the hold period.
5. No tenant improvements beyond the budget
Capital improvements are capped at the amounts fixed in the offering documents. The IRS wants DSTs to hold and operate property as it is, not reposition or develop it, so discretionary spending on improvements counts as active management.
The constraint shows up when space needs work. If a departing tenant leaves behind a space that needs renovation to attract a replacement, the sponsor can spend only up to the pre-authorized amount; if that isn't enough, the space stays uncompetitive. A direct owner could invest to keep the property current. The DST largely can't, so what it owns at acquisition is close to what it will own throughout. A newer property in good condition is less exposed to this than an older one that depends on ongoing capital to compete.
6. No commingling of funds
Each DST's money has to stay entirely separate from any other funds the sponsor manages. Every DST is a standalone entity. Mixing funds would blur the ownership structure and make it impossible to trace an individual beneficial interest back to specific real estate, which is the clear line the IRS needs from your investment to the property behind it.
The cost of that separation is scale. The sponsor can't pool capital across multiple DSTs or funds, so each one carries its own costs, which can mean slightly higher per-unit costs than a large pooled fund. If the sponsor runs several DSTs, it's reasonable to confirm each has its own bank accounts, financial statements, and reporting. Compliant sponsors do this as a matter of course, but it's worth confirming.
7. No parking cash in long-term investments
Cash held between distributions has to stay in short-term, highly liquid instruments such as money market funds and short-term obligations. Putting it into longer-term instruments like bonds, interest rate swaps, or other yield-generating strategies would be active management and would change the passive character of the interest.
The side effect is cash drag. Money sitting idle earns almost nothing, so if the DST holds a lot of cash between distributions or during the offering period, that quietly weighs on returns, and for offerings that acquire properties on a staggered timeline the effect can be large enough to measure. Ask how quickly capital is deployed into the property after the offering closes, how much sits in money market funds, and for how long. The faster the deployment, the less this one bites.
How the restrictions work together
These seven don't operate one at a time. They compound.
Picture a property with leases rolling off soon (restriction 4) that also needs capital work to re-lease the space (restriction 5), sitting on thin reserves (restriction 1). Each limit is survivable alone; together they form a squeeze the DST structure can't relieve. High leverage locked in at closing (restriction 2), on a property with volatile income, is cash flow risk that no refinancing can soften. And in a DST that holds several properties, selling one (restriction 3) can shift the economics of everything left, with no new acquisitions available to rebalance.
So the useful way to read these is not as a checklist to tick once, but as the environment the property has to live in. The question isn't whether it clears each rule today. It's whether it can perform inside all seven at the same time, for the entire hold period.
What to ask the sponsor
Five questions get to the heart of whether a sponsor has built for these constraints or is hoping to work around them:
- How did you budget reserves, knowing you can't ask investors for more later?
- What happens if the loan matures before the projected exit?
- What are the pre-authorized leasing parameters, and how do they compare with current market terms?
- How much can you spend on tenant improvements, and is that enough for what the property needs to stay competitive?
- How quickly is investor capital deployed after closing?
A sponsor who answers these specifically and without flinching has built the business around operating inside the rules. One who hedges, complains about the rules, or floats workarounds is telling you something worth hearing.
None of these restrictions is arbitrary. Each one keeps a DST interest in the passive category that makes it like-kind property for a 1031 exchange. Expect them, and ask a sponsor how they plan to operate within them.
Frequently asked questions
Why are they called the "seven deadly sins"?
Because breaking any single one can jeopardize 1031 eligibility for the entire trust. It's industry shorthand for lines that can't be crossed.
Can a DST sponsor get an IRS waiver to violate one of the seven sins?
Technically possible, but rare and expensive in practice. It would require IRS pre-approval, which most sponsors don't pursue, so the restrictions are treated as non-negotiable.
If a sponsor violates one of the restrictions, do I automatically lose my tax deferral?
Not automatically, but it opens the door to an IRS challenge, and you'd be at risk in an audit. That is why due diligence on the sponsor's track record matters.
Do all DST sponsors strictly follow these restrictions?
Good ones do, and they're transparent about how they manage within these boundaries. Less scrupulous ones may cut corners, which makes this a real differentiator when you're comparing sponsors.
Which of the seven restrictions cause sponsors the most trouble?
Reinvesting sale proceeds (restriction 3) and tenant improvements (restriction 5) are the common pain points, because they're where flexibility disappears fastest when circumstances change.