Trading Down With a 1031: A Strategy When a Smaller Replacement Makes Tax Sense

The $200,000 you do not reinvest is taxed; the $300,000 you do reinvest is not

Take a hypothetical building that sells for $1,000,000 with an adjusted basis of $500,000 after $200,000 of depreciation, so the realized gain is $500,000. You buy a replacement for $800,000. Under IRC §1031(b) gain is recognized only up to the money and other property you receive, so the $200,000 shortfall is taxed and the remaining $300,000 of gain rolls into the new building.

The rate on that $200,000 is not one number. The part of your gain that matches depreciation you took is unrecaptured §1250 gain taxed at a maximum 25% federal rate per IRS Topic 409, the rest at 15% or 20%, and the 3.8% net investment income tax under §1411 applies above $250,000 of modified AGI for joint filers. Budget for the 25% layer on the depreciation-sized portion and confirm the allocation with your CPA: at 25% plus 3.8% the federal ceiling on this trade-down is $57,600 before state tax.

Selling costs shrink the boot. Commissions and other transactional items that appear on a typical closing statement are disregarded under Reg. §1.1031(k)-1(g)(7), and the Form 8824 line 15 instructions reduce boot received by exchange expenses, so a $60,000 commission on this sale lowers the taxable gap toward $140,000.

Three ways to finance the $800,000 building give the same $200,000 boot, or worse

Assume the building you sold carried a $400,000 mortgage, so $600,000 of exchange cash reaches the qualified intermediary. How you pay for the smaller property changes the label on the boot but never shrinks it below the value gap, because Reg. §1.1031(d)-2 nets debt relieved against debt taken on and treats cash you add as an offset, but never lets new debt offset cash that comes back to you.

• $600,000 exchange cash plus a $200,000 new loan: debt relief of $400,000 minus $200,000 of new debt leaves $200,000 of mortgage boot; recognized gain $200,000.
• $600,000 exchange cash plus $200,000 of your own savings, no loan: the $400,000 of debt relief is offset by the $200,000 you added, leaving $200,000 of boot; same result.
• $300,000 exchange cash plus a $500,000 loan: the intermediary returns $300,000 to you at the end, and that cash is boot in full; the extra $100,000 of debt you took on does not reduce it, so recognized gain rises to $300,000.
• The lesson: over-borrowing on a smaller replacement makes the tax bill bigger, not smaller, and the only variable you control is how much value you buy.

When paying tax on the gap is cheaper than any way of avoiding it

Trading down is the right call when the cash you would otherwise have to borrow or leave invested is worth more to you than the tax on it. On the example above you keep $200,000 of proceeds and pay at most $57,600 federal, so about $142,400 lands in your pocket without a loan to service in retirement.

The math tilts further toward trading down in three situations, and each one is a question for your CPA before you list.

• Your realized gain is smaller than the gap: recognized gain can never exceed realized gain, so a seller with only $150,000 of gain who trades down by $200,000 is taxed on $150,000, not $200,000.
• You are in a low-income year, for example the first year after retiring, when part of the gain may fall in the 0% or 15% bracket instead of 20%.
• You would otherwise refinance to raise the same cash; compare the tax on the gap with the interest and risk of a loan in cash-out refi vs 1031, and with taking cash deliberately at the sale closing in intentional boot.

A DST interest sized to the gap turns an $800,000 purchase into a $1,000,000 exchange

If you like the smaller building but not the tax, the gap can be filled with a fractional interest in a Delaware Statutory Trust rather than a second building you have to manage. The arithmetic only works if you shift exchange cash into the DST and borrow a little more on the direct property, or pick a DST that carries its own sponsor-level debt.

Using the same $600,000 of exchange cash and $400,000 of debt relief: buy the $800,000 building with $400,000 of exchange cash and a $400,000 loan, and send the other $200,000 of exchange cash into a DST interest. Total replacement value is $1,000,000, every exchange dollar is reinvested and the $400,000 loan replaces the old mortgage, so the boot is zero.

Both the building and the DST must be on your written identification by day 45 and closed by day 180 under the 1031 deadlines. Our role at Breakwater Exchange is to line up a DST interest from vetted national sponsors that fits the exact dollar gap, so the direct property can be the size you actually want.

An improvement exchange or a second small property can absorb the gap instead

Exchange dollars spent on construction count toward replacement value if the work is done under an improvement exchange structure and completed within the 180 days, which suits an owner who wants an $800,000 building plus a $200,000 renovation. The cost is a second closing and an exchange accommodation titleholder, and unfinished work on day 180 does not count.

A second small property is the other route, subject to the identification limits of three properties or 200% of value, but it puts you back into managing two assets, which is usually the reason a downsizing owner wanted to trade down in the first place. Weigh it against consolidating into one managed property before you commit.

Report the trade-down on Form 8824 and carry the deferred $300,000 forward

On the Form 8824 instructions, Part III line 15 collects the cash and net debt relief you received less exchange expenses, line 19 is the gain realized and line 20 is the smaller of the two, which is the gain you pay tax on. Line 25 gives the basis of the new building.

Under §1031(d) the replacement basis is the old basis of $500,000, minus the $200,000 of money treated as received, plus the $200,000 of gain recognized, which is $500,000 on an $800,000 building. That leaves $300,000 of gain deferred, and it will surface on the next sale unless you exchange again or hold until a step-up at death; the rules here are general, so have your CPA or attorney confirm them against your closing statements.