Rental Investing8 min read

Montana 1031 Exchange: How to Defer Capital Gains When Selling Rental Property

Sell a Montana rental property and buy another without paying capital gains tax — if you follow the rules exactly. Here's how 1031 exchanges work in Montana, including the state clawback trap.

Montana Property Guide·March 5, 2026

What a 1031 Exchange Does

When you sell an investment property at a profit, you normally owe capital gains tax on that profit — both federal (15–20%) and Montana state (3–4.1%).

A 1031 exchange (named after IRC Section 1031) lets you defer those taxes by reinvesting the proceeds into another investment property. You don't pay the tax now — you kick it down the road to whenever you eventually sell without exchanging.

Some investors chain 1031 exchanges for decades, deferring taxes through multiple properties until they die — at which point the tax obligation disappears through the stepped-up basis.

It's one of the most powerful wealth-building tools in real estate. Montana follows federal 1031 rules with one important state-specific wrinkle.

The Rules (Non-Negotiable)

Both Properties Must Be Investment/Business Property

The property you sell (relinquished property) must be held for investment or business use
The property you buy (replacement property) must also be held for investment or business use
Your primary residence does not qualify
A vacation home you sometimes rent out is a gray area — consult a tax professional

Like-Kind Requirement

"Like-kind" in real estate is broad. Any real property qualifies for any other real property:

Single-family rental → Apartment building ✓
Raw land → Commercial building ✓
Retail space → Farmland ✓
Montana property → Property in another state ✓ (but watch the Montana clawback — see below)

The Deadlines Are Strict

Deadline	Requirement
Day 0	You sell (close on) your relinquished property
Day 45	You must identify up to 3 potential replacement properties in writing
Day 180	You must close on the replacement property

These deadlines are absolute. No extensions, no exceptions, no "the deal fell through" excuses. Miss day 45 by one day and the entire exchange fails — you owe full capital gains tax.

You Cannot Touch the Money

The sale proceeds must go to a Qualified Intermediary (QI) — a neutral third party who holds the funds between transactions. You cannot have access to, control over, or receipt of the money at any point.

If the funds touch your bank account — even briefly — the exchange is disqualified.

Source: Start1031 — Montana 1031 Exchange Rules

Montana's State-Specific Rules

Montana Capital Gains Tax Rates

Montana charges state capital gains tax on property sales:

3.0% on the first $42,200 of capital gains
4.1% on gains exceeding $42,200

A 1031 exchange defers both the federal AND Montana state tax.

The Montana Clawback Provision

This is the trap most out-of-state guides don't mention:

If you sell a Montana property and exchange into an out-of-state property, and then later move out of Montana, the state has a clawback provision that can require you to pay the deferred Montana capital gains tax.

In practice, this means:

Exchange Montana property for another Montana property → clean and simple
Exchange Montana property for a Texas property → works initially, but if you later leave Montana, the state may collect

This doesn't mean you can't exchange into other states — just be aware of the potential future tax obligation and discuss it with your CPA.

No State Transfer Tax

Montana does not charge a real estate transfer tax, which means the closing costs on both legs of your exchange are lower than in many states.

Required Tax Filings

For a Montana 1031 exchange, you must file:

Federal Form 8824 (Like-Kind Exchanges) with your federal return
Montana Form 2 (Individual Income Tax Return) reporting the exchange

Source: Steadily — Montana 1031 Exchange Rules

Step-by-Step Process

1. Hire a Qualified Intermediary BEFORE Listing Your Property

You must have the QI identified and the exchange agreement in place before closing. You cannot retroactively make a sale into a 1031 exchange.

QI fees typically run $750–$1,500 for a standard exchange.

2. Sell Your Property

Close normally. The QI receives the funds directly from the title company — money never touches your hands.

3. Identify Replacement Properties (Within 45 Days)

Submit a written, signed identification of up to 3 potential replacement properties to your QI. You can also use the "200% rule" (identify any number of properties as long as total value doesn't exceed 200% of what you sold) or the "95% rule" (identify any number but must close on 95% of total value).

Most investors stick with the 3-property rule — it's simplest.

4. Close on Replacement Property (Within 180 Days)

The QI sends funds to the title company for your purchase. You close on the replacement property.

5. File Your Taxes

Report the exchange on Form 8824 and Montana Form 2. Your tax basis in the new property carries over from the old one (adjusted for any boot received).

Common Mistakes

Starting too late. You need the QI set up BEFORE your sale closes. Starting the process after closing means you already "received" the funds — exchange disqualified.

Missing the 45-day identification. This deadline is the one that kills most exchanges. Start identifying replacement properties the day after you sell — don't wait.

Touching the money. Even having your QI send you "just a little" of the proceeds (called "boot") triggers partial tax on that amount.

Exchanging into a property you'll live in. The replacement must be held for investment. Moving into it immediately suggests it's a personal residence, not an investment — which can disqualify the exchange retroactively.

Ignoring the Montana clawback. If you plan to leave Montana eventually, talk to a CPA about the out-of-state exchange implications before committing.

When NOT to Do a 1031 Exchange

You need the cash. If you need sale proceeds for non-real-estate purposes, a 1031 ties your money up in another property.
Your capital gains are small. If you're only deferring $5,000 in tax, the QI fees and constrained timeline may not be worth the hassle.
You can't find a good replacement. Buying a bad property just to avoid taxes is worse than paying the tax and keeping the cash.
You want to simplify your life. Sometimes selling, paying the tax, and being done is the right move.