What Is a 1031 Exchange? A Plain-English Guide for Property and Business Owners

A 1031 exchange lets you sell investment real estate and reinvest the proceeds into a like-kind property without paying capital gains tax right away.

It's a deferral, not a write-off — the tax bill comes due later unless you keep exchanging.

Why it matters: A 1031 exchange only applies to investment real estate — it does not apply to the sale of a business itself, even by narrow exception (business aircraft traded for business aircraft is about the only carve-out). But plenty of Main Street deals involve a business that owns the building it operates from, and that changes the picture. If the real estate and the operating business are sold together, or the owner wants to keep the real estate and lease it back to the new owner, the 1031 clock and the business sale timeline have to be planned around each other from day one. The exchange deadlines are federal and absolute — they don't move because a buyer's financing fell through or a business sale is taking longer to close. Getting this wrong doesn't just cost convenience; it can cost the entire tax deferral.

The rules that matter

• 45 days to identify a replacement property after closing the sale.
• 180 days (or your tax filing date, if earlier) to close on the replacement.
• The property must be U.S.-based investment property — not a primary residence, and not a business (with narrow exceptions).

Most practitioners treat one to two years of holding time as the safe minimum before a sale qualifies as "investment" property rather than a flip.

Example: A business owner sells the warehouse their manufacturing company operates from for $900,000 as part of an asset sale, planning to reinvest the proceeds into a smaller rental property near retirement. Because the warehouse sale and the business asset sale close on the same date, the 45-day identification window starts ticking immediately — before the ink is even dry on the business sale paperwork. Without a 1031 intermediary lined up in advance, the owner risks missing the window and owing capital gains tax on the full appreciation of the warehouse.

Get expert help. Exchanges (simultaneous, delayed, forward, reverse, two-party, three-party) have enough structuring variants that working with a 1031 intermediary and a tax professional isn't optional.

Related terms: Boot, Qualified Intermediary, Deferred Sales Trust, Depreciation Recapture