Colorado Real Estate Education
1031 Exchanges and Capital Gains: A Simple Colorado Real Estate Guide
Quick answer: A qualifying primary home seller may be able to exclude up to $250,000 of gain or up to $500,000 for many married couples filing jointly. A 1031 exchange is different: it may defer gain when qualifying business or investment real estate is exchanged for other qualifying real estate.
Start Here
What Is the Difference Between the Home Sale Exclusion and a 1031 Exchange?
They apply to different situations. The federal primary home exclusion—commonly associated with Internal Revenue Code Section 121—may remove qualifying gain from taxable income. A Section 1031 like kind exchange generally postpones recognition of qualifying gain on business or investment real estate by carrying tax basis into replacement property.
Possible Gain Exclusion
The IRS says qualifying taxpayers may exclude up to $250,000 of gain, or up to $500,000 on many married joint returns. The ownership, use and look back requirements matter.
Possible Tax Deferral
A properly structured 1031 exchange can defer qualifying gain when eligible real property is exchanged for other like kind real property. The deferred gain is generally carried forward, not forgiven.
Important distinction: A home used only as your principal residence generally is not eligible for a 1031 exchange. Property with rental, business, mixed use or conversion history can be more complicated and deserves individualized advice.
Primary Residence
How Does the Primary Home Capital Gains Exclusion Work?
Most qualifying individual or non-joint filers may exclude up to $250,000 of gain. Many married couples filing jointly may exclude up to $500,000. According to the IRS home-sale guidance, the basic ownership and use tests generally require owning and living in the home as a main residence for at least two years during the five year period ending on the sale date.
The full joint exclusion has additional requirements, and the exclusion normally cannot be reused if it was claimed for another home sold during the prior two years. Partial exclusions and special rules may apply in some circumstances. Use IRS Publication 523 and a tax professional for the actual calculation.
A simple gain formula
Amount realized from sale − adjusted basis = gain. The amount realized can reflect selling expenses. Adjusted basis may begin with the purchase price and change for qualifying acquisition costs, capital improvements, casualty adjustments, depreciation and other items. It is not always just “sale price minus purchase price.”
What if the gain is larger than the exclusion?
Any gain remaining after an available exclusion may be taxable. Most net long term capital gain is subject to federal rates that can be 0%, 15% or 20% depending on taxable income. Some taxpayers may also face the 3.8% Net Investment Income Tax, and Colorado income tax may apply. Verify the current year treatment with a tax professional rather than estimating from a headline rate.
Local Market Illustration
What Could an Aurora Home Purchased in 2015 Look Like Today?
For a simple local benchmark, Denver–Aurora home values roughly doubled from mid 2015 to mid 2026. The FHFA all transactions index rose from 245.18 in the second quarter of 2015 to 492.50 in the second quarter of 2026. That equals approximately 100.9% total growth, or about 6.5% compounded annually.
Zillow reported a June 2026 Aurora median sale price of $463,800 and a July 2026 typical home value of $458,582. Applying the FHFA growth ratio backward to $463,800 produces a rounded 2015 illustration near $231,000. This is a teaching example—not a historical paired sale, appraisal or estimate for any specific home.
Example One
An individual filer whose gain exceeds $250,000
Assume an owner bought a qualifying primary residence for $300,000 in 2015 and the property followed the same Denver–Aurora appreciation benchmark.
$303,000 simplified gain − $250,000 potential exclusion = about $53,000 potentially taxable. Selling expenses, improvements and other basis adjustments could reduce or change that amount.
Example Two
A married couple whose gain exceeds $500,000
Assume a married couple filing jointly bought a qualifying primary residence for $550,000 in 2015 and the property followed the same appreciation benchmark.
$555,000 simplified gain − $500,000 potential exclusion = about $55,000 potentially taxable. Selling expenses, improvements and other basis adjustments could reduce or change that amount.
Why the real answer may differ: These examples intentionally omit commissions and other selling expenses, capital improvements, acquisition costs, depreciation, periods of rental or business use, prior exclusions, special assessments and other basis adjustments. A property’s actual appreciation also depends on location, condition, property type and improvements.
Plan Before Closing
A 1031 exchange starts before the sale
Receiving or controlling the proceeds can jeopardize an exchange. Investors commonly engage a qualified intermediary before the relinquished property closes.
Investment Real Estate
What Is a 1031 Exchange?
A Section 1031 exchange may defer gain on qualifying business or investment real property. The IRS explains that the relinquished and replacement assets must be qualifying real property held for productive use in a trade or business or for investment. Property held primarily for sale does not qualify, and U.S. real property is not like kind to real property outside the United States.
“Like kind” is broader than “identical.” For example, qualifying U.S. investment real estate may potentially be exchanged for a different type of qualifying U.S. real estate. Cash or other non-like kind property received can create recognized gain. Review the IRS like-kind exchange overview and Form 8824 instructions.
Before closing
Build the tax, legal, financing and replacement property team. A qualified intermediary is commonly engaged before the relinquished property transfers.
Within 45 days
Identify replacement property in writing under the applicable identification rules. The 45 day period begins when the relinquished property transfers.
Within 180 days
Receive the replacement property by the earlier of 180 days after transfer or the tax return due date, including extensions.
Example Three
A simplified Aurora area rental exchange
Suppose an investment property purchased for $300,000 in 2015 tracked the same FHFA growth benchmark and is worth about $603,000 in 2026. The owner arranges a compliant exchange through a qualified intermediary and acquires a $650,000 qualifying replacement rental.
A properly completed exchange may defer qualifying gain, but the calculation is not simply $603,000 minus $300,000. Depreciation may have reduced the adjusted basis, cash received can create taxable “boot,” debt changes matter, and exchange expenses affect the result. The replacement property generally receives a carried over basis, so the deferred tax has not disappeared.
Planning Checklist
What Should You Do Before Listing or Exchanging a Property?
- Identify the property’s use. Is it your main home, a rental, a business property, vacant investment land, mixed use property or property held primarily for resale?
- Estimate adjusted basis. Gather the original closing statement, improvement records, depreciation schedules, casualty information and prior exchange documents.
- Estimate net proceeds. Sale price alone is not the same as amount realized or cash available for a replacement purchase.
- Speak with a tax professional. Ask about federal capital gains, depreciation recapture, Net Investment Income Tax, Colorado income tax and estimated tax obligations.
- Contact a qualified intermediary before closing. If a 1031 exchange may be appropriate, do not wait until sale proceeds are being disbursed.
- Coordinate real estate timing. Financing, inspections, identification rules and the 180 day deadline can make replacement property planning as important as selling the first property.
I can help with property preparation, pricing, market positioning and transaction coordination. Your CPA, tax attorney and qualified intermediary should determine whether a tax strategy applies to your individual circumstances.
Frequently Asked Questions
Common Questions About 1031 Exchanges and Home Sale Gains
Do I pay capital gains tax on every primary home sale?
Not necessarily. Qualifying taxpayers may exclude some or all of the gain within the applicable $250,000 or $500,000 maximum. Gain, filing status, ownership, use, prior exclusions and rental or business history all matter.
Is the $250,000 or $500,000 exclusion based on the sale price?
No. It applies to qualifying gain, not the gross sale price. Gain is calculated using amount realized and adjusted basis.
Can I use a 1031 exchange for my primary residence?
A home held only for personal use generally does not qualify. A property with investment, rental, mixed use or conversion history can involve special rules, including possible interaction between Sections 121 and 1031.
Does a 1031 exchange eliminate capital gains tax?
Generally, it defers qualifying gain by carrying basis into replacement property. A later taxable disposition may recognize the deferred gain unless another applicable rule changes the result.
When should I contact a qualified intermediary?
Before the relinquished property closes. Receiving or controlling sale proceeds can prevent the transaction from qualifying for deferred exchange treatment.
Does Colorado also tax a taxable real estate gain?
Colorado generally calculates individual income tax using modified federal taxable income, so state tax may apply when gain remains federally taxable. Colorado’s capital gain subtraction is narrow. Confirm current state treatment with a Colorado tax professional.
Can a Realtor calculate my tax bill?
No. A real estate professional can provide transaction documents and market information, but a qualified tax professional should calculate tax consequences and recommend a tax strategy.
Authoritative Resources
Sources and next-step reading
- IRS: Sale of residence
- IRS Publication 523: Selling Your Home
- IRS: Like-kind exchanges
- IRS Form 8824 instructions
- IRS Topic 409: Capital gains and losses
- IRS: Net Investment Income Tax
- Colorado Individual Income Tax Guide
- FHFA/FRED: Denver–Aurora house-price index
- Zillow: Aurora home-value and sale-price data
- Related guide: Living in Aurora, Colorado
Data note: Market figures were checked September 2, 2026. Zillow’s Aurora figures were reported through June or July 2026. The FHFA/FRED comparison uses Q2 2015 and Q2 2026 index observations. Market data can be revised.
Colorado Real Estate Guidance
Planning a Property Sale?
John Nichols
Real Estate Advisor | Coldwell Banker Realty
I can help you evaluate the real estate side of selling a home or investment property and coordinate with the tax and legal professionals you select.
John Nichols and Coldwell Banker Realty do not provide tax, legal or financial advice. Consult qualified professionals about your individual situation.
