1031 Exchange vs Holding for Step-Up in Basis: Timing One Last Swap

What dies with you is the gain, and §1014(c) names the one asset that would not have

Thirty years of exchanges leave a building with a tiny basis and an enormous unrecognised gain, and none of it reaches your children. §1014(a)(1) gives property acquired from a decedent a basis equal to what it was worth the day the owner died, so an heir who sells the next week has essentially no gain at all.

That covers the depreciation layer too. The 25% unrecaptured §1250 gain you accumulated is part of the gain measured against basis, and once basis is reset there is nothing left to recapture, which is why the layer never appears on an heir's return.

The exception is worth knowing because it is the road not taken. §1014(c) withholds the section from any right to receive income in respect of a decedent, and §691(a)(4) drops a seller note's untaxed balance into exactly that bucket. Sell on a note instead of exchanging and your heirs inherit the untaxed gain; exchange, and they do not.

Both routes finish at the same reset, which turns the last exchange into an income question

Because the reset applies to whatever you happen to own on the day you die, holding the tired fourplex and holding a DST interest you exchanged into produce identical basis outcomes for your estate. The deferred tax is not larger or smaller on one path than the other.

That removes tax from the decision and leaves the honest questions: how much income the asset produces, how much of your week it consumes, how concentrated your net worth is in one building and one market, and how easily the thing can be divided among heirs who may not agree.

It also means the exchange has to justify itself the way any other investment decision does. You are paying real transaction costs today to change the asset, so the change has to earn those costs back inside your remaining horizon.

Break-even in one line: the one-time cost divided by the annual income it buys

Hypothetically you own a $2,000,000 building with a $300,000 adjusted basis that nets $70,000 a year after management, repairs and reserves. Selling costs of 5% take $100,000 off the top, so $1,900,000 of equity moves into the replacement.

Assume that replacement, a diversified set of DST interests, distributes a hypothetical 4.5% on the amount invested, or $85,500. The income improves by $15,500 a year, and $100,000 divided by $15,500 is 6.5 years before the swap has repaid the cost of making it.

Use your own three inputs rather than these: the total one-time cost, the current net income after everything the property really consumes, and the distribution rate actually quoted in the offering documents. If the break-even runs past a realistic horizon, the property your heirs receive is simply smaller for having been exchanged, and holding is the better answer.

Four facts that argue for making the swap at seventy rather than never

None of these are about rates. Each is a reason the current asset is the wrong thing for your estate to be holding on the day the reset arrives.

• Concentration: one building, one market and often one or two tenants. Trust interests spread across sponsors, asset classes and states convert a single point of failure into a portfolio, and the reset applies to all of it.
• Divisibility: a fourplex cannot be split three ways without a sale or a fight, whereas fractional interests can be left in different proportions, which is the subject of DSTs for simple inheritance.
• Management you can no longer do: if the alternative to exchanging is a property manager taking a slice and decisions nobody is making, the income comparison above is already understating the gap.
• Debt with a maturity date: a loan that balloons after your likely horizon forces your executor to refinance or sell under pressure, and the exchange is the last easy moment to replace it with non-recourse trust-level debt.

Four that argue for leaving the building exactly where it is

The default deserves more credit than it usually gets, because doing nothing has no transaction cost and no deadline.

• A short horizon: at a 6.5-year break-even, a seller with health problems is converting principal into fees that the income will not repay before the reset arrives anyway.
• An assumable or below-market loan attached to the property, which is value that disappears the moment you sell.
• A property your family wants to keep, use or operate, where liquidity and diversification are not the goal at all.
• A plan to move into it: two years of use as a principal residence can open part of the §121 exclusion, although §121(d)(10) bars that exclusion for five years once property has come out of an exchange, so the order of events matters.

Sensitivity: what genuinely moves the break-even, and what cannot be modelled

Three inputs move the answer materially, and they are all knowable today. Selling costs are quoted before you list; the current net income is in your own books once you charge yourself honestly for management and reserves; and the distribution rate is in the offering documents rather than in a projection.

Two inputs are not knowable and should be excluded. Nobody can tell you what rents, rates or property values will do over your remaining horizon, and nobody can tell you whether §1031 or §1014 will read the same way in ten years. What the law says today is that real property exchanges are permitted under §1031 and that basis resets at death under §1014, and tax law change risk covers the rest.

One number is often assumed to matter and does not: the size of the deferred gain. Since both paths end in the same reset, a $1,700,000 deferred gain does not make the exchange more attractive than a $200,000 one. Confirm all of this against your own facts with your CPA or attorney before acting.