Boot is anything an investor receives in a 1031 exchange that isn’t like-kind real estate — leftover cash, or relief from debt that isn’t replaced. Boot doesn’t disqualify the exchange; it’s simply taxable, recognized as gain to the extent received, and it is the most common way “fully deferred” exchanges quietly leak taxes.
The two kinds and how they arise
Cash boot is exchange proceeds the investor ends up with rather than reinvesting — a $2 million sale rolled into a $1.8 million replacement property leaves $200,000 of taxable boot. Mortgage (debt) boot is subtler: debt relief counts as money received, so paying off a $1 million mortgage at sale and taking only $700,000 of debt on the replacement creates $300,000 of boot — unless offset by adding equivalent new cash. The working rules that prevent it: buy replacement property of equal or greater value, reinvest all net equity, and take on equal or greater debt (or substitute fresh cash for the shortfall). Boot also hides in details: non-realty items in a sale, prorations and credits at closing, and earnest money handled outside the qualified intermediary can all generate small recognitions — which is why exchange closings are choreographed line-by-line. In the DST market, boot management is half the product’s utility: fractional interests let an exchanger match value and debt precisely (DSTs publish their loan-to-value so investors can replace debt in the right proportion), mopping up remainders that whole-property purchases can’t fit. Partial recognition is sometimes rational — taking modest boot and paying tax on it beats overbuying an ill-fitting property — but it should be a decision, not a surprise on the return.
Related terms
1031 Exchange · Replacement Property · Qualified Intermediary · Delaware Statutory Trust (DST) · Depreciation Recapture
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