There is a particular kind of relief that arrives when a replacement property closes. The clock stopped. The gain is deferred. Most owners mentally file the whole thing under done.
It isn't. Not yet. Because as far as the IRS is concerned, you sold a property that year, and nothing on the public record says the proceeds went anywhere special. A 1031 exchange is a position you claim on a tax return, and claiming it takes a specific form: Form 8824, Like-Kind Exchanges. Until that form is filed, the exchange is unreported, and an unreported exchange is just a sale.
You file it even when you owe nothing
This is the part that catches people. The whole point of the exchange was to recognize no gain, so it feels reasonable to assume there is nothing to report. The opposite is true. You must file Form 8824 for the tax year in which you transferred the relinquished property, whether or not you recognized any gain. The form is how you tell the IRS that a sale it can otherwise see was actually half of an exchange.
If your exchange straddled two tax years, a sale late in one year and a closing in the next, the reporting still attaches to the year you gave up the old property. That surprises people whose exchange finished in the spring, and it is worth confirming the year with your CPA rather than assuming.
What the form actually asks for
Form 8824 is short, and it walks through the exchange in three movements.
- Part I: the properties and the dates. Descriptions of what you gave up and what you received, the date you transferred the relinquished property, the date you identified the replacement, and the date you acquired it. This is where the 45-day and 180-day timeline gets put in writing for the IRS to see. Miss a deadline and this section is where it becomes visible.
- Part II: related parties. Only relevant if the exchange involved a related party, in which case you identify them. This is also what sets up the two-year reporting obligation that follows a related-party exchange.
- Part III: the math. Fair market values, liabilities assumed or relieved, cash received, realized gain, the portion recognized, and your basis in the replacement property. This is where boot shows up as a number if any crept in, and where the debt relief that creates mortgage boot is reconciled.
That last calculation matters long after filing. The basis Form 8824 establishes in your replacement property is the basis you will depreciate for years, and the basis your next exchange starts from. Get it wrong and the error compounds through every year and every exchange that follows.
The records that make this straightforward
Almost every filing headache we see traces to documents nobody thought to keep. Your CPA will want:
- Closing statements for both the relinquished and replacement properties
- The exchange agreement and assignment documents from your qualified intermediary, plus their accounting of funds in and out
- Your signed, dated identification notice, which evidences the 45-day deadline
- Loan payoff and new financing documents, for the debt figures in Part III
- The depreciation schedule from the old property, which carries forward
Ask your intermediary for a complete exchange file at closing while everything is fresh, rather than in March when the memory of who wired what has faded.
A few things worth flagging to your CPA
Not every CPA prepares these regularly, and a handful of details are easy to miss: a partial exchange still gets reported here, with the boot flowing through to your gain; state filings may run separately, and some states impose their own ongoing reporting, notably California's annual filing obligation after a clawback-eligible exchange; and if you sold multiple properties, the reporting has to reflect how they were grouped.
None of this is exotic, but it rewards a preparer who has done it before. We coordinate with clients' CPAs at closing precisely so this handoff is clean, which is the last step of our exchange process rather than an afterthought. Your CPA determines how your specific exchange should be reported.
Questions we field about reporting a 1031 exchange
Do I have to file Form 8824 if I did not recognize any gain?
Yes. The form is required for the year you transferred the relinquished property whether or not gain was recognized. Fully deferred exchanges are still reported.
Which tax year does the exchange belong to?
Generally the year you transferred the relinquished property, even if the replacement closed in the following calendar year. Confirm the specific year with your CPA.
What if I received some cash or reduced my debt?
That boot is reported in Part III and is taxable up to the amount of your gain. A partial exchange is reported on the same form; it is not a separate filing.
Does Form 8824 set my basis in the new property?
Yes, the calculation establishes your basis in the replacement property, which drives your future depreciation and the starting point for your next exchange. Accuracy here matters for years.
What documents should I keep?
Closing statements for both properties, the intermediary's exchange agreement and fund accounting, your signed identification notice, loan documents, and the prior depreciation schedule.