1031 Exchange Calculator
Estimate your 45-day and 180-day deadlines, calculate the tax you can defer, and see how compounding on the full sale price builds wealth over 10, 20, and 30 years compared to paying tax and reinvesting the net proceeds.
Your Property Details
Enter your numbers
The Essentials
What is a 1031 Exchange?
Section 1031 of the Internal Revenue Code allows real estate investors to defer capital gains taxes when selling an investment or business-use property — provided they reinvest the proceeds into a "like-kind" replacement property. In the Bay Area, where a single rental property can generate $500,000 or more in taxable gain, this deferral is often the difference between building generational wealth and handing a third of your equity to the IRS.
The concept is simple: instead of selling, paying taxes, and reinvesting the diminished net proceeds, you exchange into a replacement property with the full pre-tax amount working for you. At 5% annual appreciation, a $1M deferral becomes an additional $630,000 over 10 years — money that compounds in your portfolio rather than in the government's accounts.
The Like-Kind Requirement
Despite the name, "like-kind" is broader than most investors assume. Any investment or business real estate can be exchanged for any other investment or business real estate. A Silicon Valley single-family rental can exchange into a commercial building, a multi-family in Sacramento, or a net-lease retail property in another state. The only restriction is that both properties must be held for investment or productive use in a trade or business — not for personal use.
What Does Not Qualify
Your primary residence does not qualify. A vacation home used primarily for personal enjoyment does not qualify. Property held primarily for sale (dealer property or house flips) does not qualify. If you converted a former primary residence to a rental, consult a tax advisor about the minimum rental period required before a 1031 exchange becomes available.
The Two Deadlines You Cannot Miss
The IRS imposes two hard deadlines that run concurrently from the closing date of your sale. Day 45: You must identify potential replacement properties in writing to your Qualified Intermediary. You may identify up to 3 properties of any value, or more properties subject to the 200% rule or 95% rule. Day 180: You must close on your replacement property. No extensions are granted except in presidentially declared disaster areas. Miss either deadline and the exchange fails — all deferred gain becomes immediately taxable.
Bay Area Use Cases
Silicon Valley landlords frequently use 1031 exchanges to consolidate multiple smaller rentals into a larger multi-family building, to exit management-intensive properties into triple-net leases, or to reset depreciation schedules on aging rentals. With median investment property values in San Jose, Cupertino, and Sunnyvale routinely exceeding $1.5M, the deferred tax bill on a single sale can top $400,000 — making the qualified intermediary fee a trivial cost.
Disclaimer: 1031 exchanges require a Qualified Intermediary (QI). You cannot take constructive receipt of the funds at any point during the exchange. This calculator is for educational purposes only and does not constitute tax or legal advice. Consult a licensed CPA, tax attorney, and Qualified Intermediary before initiating an exchange. See also: Capital Gains Tax Calculator — Seller Net Proceeds.
Common Questions
1031 Exchange FAQ
A 1031 exchange (named after IRC Section 1031) lets real estate investors sell an investment property and defer capital gains taxes by reinvesting the proceeds into a like-kind replacement property. The exchange must be facilitated by a Qualified Intermediary and must meet strict IRS deadlines — 45 days to identify and 180 days to close.
Within 45 days of selling your relinquished property, you must formally identify potential replacement properties in writing to your Qualified Intermediary. You can identify up to 3 properties of any value (the 3-property rule) or more properties under certain value constraints. The identification must be unambiguous — a street address or legal description.
You must close on your replacement property within 180 days of selling your relinquished property — or by the due date of your tax return for that year, whichever is earlier. If you sell in late October and file in April, the tax return deadline may cut the 180-day window short. An experienced QI will flag this.
Boot is any non-like-kind value received in an exchange — most commonly cash received because the replacement property is worth less than the relinquished property, or debt relief not offset by new debt. Boot is taxable in the year of the exchange. To defer 100% of the gain, the replacement property must equal or exceed both the value and the equity of the relinquished property.
No. Section 1031 applies only to property held for investment or use in a trade or business. Your primary residence does not qualify. However, you may be eligible for the Section 121 exclusion — up to $250,000 ($500,000 MFJ) of capital gains tax-free on a primary residence you owned and lived in for 2 of the last 5 years. Use our Capital Gains Tax Calculator to estimate your Section 121 exclusion.
Ready to protect your equity from taxes?
I work with investment property owners across Silicon Valley to structure 1031 exchanges, identify replacement inventory, and close on both sides. Schedule a complimentary consultation.
Book a Complimentary Consultation