A Colorado landlord we spoke with had owned a rental in Denver for four years, never filed a Colorado state return, and had no idea that was a problem. He thought because Colorado doesn't withhold taxes from his rental checks, he wasn't on the hook for anything. He was wrong, and the conversation with his CPA wasn't short.
If you own a rental property in Colorado and you don't live here, you owe state income tax on that property's income. It doesn't matter where you live. It doesn't matter whether your property manager sends you checks from a Colorado bank account. The income has a Colorado source, which means Colorado has a claim on it. This guide covers what you actually owe, what most out-of-state owners miss, and what you should have in place before your next filing deadline.
Yes, Colorado Taxes You Even If You Don't Live Here
Colorado taxes nonresidents on all income derived from Colorado sources. A rental property in Denver, Aurora, or Boulder generates Colorado-source income. Full stop.
You are required to file a Colorado nonresident income tax return (Form DR 0104) for any year in which your net rental income from Colorado property exceeds $0 after deductions. This is not discretionary. The filing requirement exists regardless of how much you earned, where you live, or whether you've ever visited the state.
The good news is that Colorado's income tax rate is 4.4% flat. No brackets, no phase-outs. You pay 4.4% on your net Colorado rental income. That net number is after deductions, and there are real deductions available - which we'll get to.
The bad news is that the flat rate and the lack of withholding create a false sense of security. Nothing is being withheld from your rental payments. So you could go years without filing and nothing obvious happens. Until the state's matching program catches the property in your name and sends you a notice.
Filing Colorado Taxes as a Non-Resident Landlord
You'll file the Colorado Form DR 0104, which is the standard individual income tax return. As a nonresident, you'll complete Schedule F (Apportionment Schedule for Nonresidents) to establish what portion of your income is Colorado-sourced.
Your Colorado taxable income from the rental is generally your net income from Schedule E (federal), allocated to Colorado. So if your federal Schedule E shows a net loss from the property (after deductions and depreciation), you may owe little to nothing in Colorado. If you're showing positive net income, that's taxed at 4.4%.
The return is due April 15, aligning with your federal return. You can file an extension, but any tax owed is still due April 15 or you'll owe interest.
Out-of-state owners frequently underestimate the complexity of getting this right. A professional property manager doesn't file your taxes - but at Sheepdog, every owner gets a clean monthly ledger, annual income/expense summary, and organized records that make the Colorado return straightforward for your CPA. If you want to understand what that looks like, reach out.
Schedule E: How Rental Income and Expenses Flow
Schedule E (Supplemental Income and Loss) is the federal form where rental income and expenses are reported. Your Colorado return starts from this number.
Deductible rental expenses include:
- Mortgage interest
- Property taxes
- Insurance premiums
- Repairs and maintenance
- Property management fees (yes, your PM fees are deductible)
- Utilities you pay
- Advertising and leasing costs
- Professional fees (attorney, CPA)
Depreciation is a separate but significant deduction. Residential rental property is depreciated over 27.5 years. If your Denver property is worth $500,000 and the land value is $100,000, you're depreciating $400,000 at 1/27.5 per year - roughly $14,500 annually. That deduction reduces your taxable rental income significantly, often resulting in a paper loss even in years with positive cash flow.
The catch on depreciation: When you sell, depreciation recapture is taxed at up to 25% federally. This is a real number and should factor into your exit planning.
Keep every receipt. Every invoice from a contractor, every property management statement, every insurance renewal. An out-of-state owner without a property manager is almost always operating with incomplete records - no organized repair receipts, no maintenance log, no documented ledger. That's manageable until it isn't.
The 2% Sale Withholding (Different from Rental Income)
Colorado requires a 2% withholding at closing when a nonresident sells real estate in the state. This applies to the gross sales price, not the gain. On a $600,000 sale, that's $12,000 withheld at closing.
This is not an additional tax. It's a prepayment against your Colorado capital gains liability. If you owe less than $12,000 in Colorado capital gains tax, you'll get a refund after filing. If you owe more, the withholding is credited against what you owe.
Out-of-state owners confuse this with rental income withholding constantly. There is no Colorado withholding on rental income - that's entirely different. The 2% withholding applies only at the point of sale.
If you're executing a 1031 exchange, your Qualified Intermediary needs to know about the 2% withholding requirement before closing. Handling this incorrectly can complicate the exchange.
1031 Exchanges for Non-Resident Colorado Owners
A 1031 exchange lets you defer capital gains by selling one investment property and rolling the proceeds into another like-kind property. For a non-resident Colorado owner, the federal rules are the same as for anyone. The Colorado-specific wrinkle is the 2% withholding at closing.
The exchange timeline is strict: You have 45 days from closing to identify replacement properties and 180 days to close on the replacement. The replacement property doesn't have to be in Colorado - it can be anywhere in the country. Many out-of-state owners use this to exit Colorado real estate entirely while deferring tax.
If you're a Colorado nonresident selling property and doing a 1031, your QI handles the escrow and paperwork. Just make sure they're aware of the Colorado withholding requirement so it doesn't gum up the closing.
If You Own Through an LLC
Many investors hold rental properties in LLCs for liability protection. If you set up an out-of-state LLC (say, a California LLC) that owns a Colorado rental property, you likely need to register that entity as a foreign entity in Colorado. That means a one-time registration filing plus an annual report and associated fees.
Colorado requires foreign LLCs doing business in the state to register with the Secretary of State. Owning real estate generally qualifies as "doing business." If you skipped this step, the fix is usually straightforward - but the longer you wait, the more back fees can accumulate.
The income still flows through to your personal Colorado return the same way. LLC tax treatment is pass-through in most cases, so you as the member still file a personal nonresident return.
If you're unsure about your entity structure or registration status, this is a question for a Colorado CPA or business attorney, not your out-of-state tax preparer who may not know Colorado's rules.
The Documentation Problem
Out-of-state owners without local management face a recurring problem at tax time: their records are incomplete. Maybe a tenant paid cash one month. Maybe a contractor was paid without a receipt. Maybe the heating system repair from November is somewhere in an email thread but never made it to a spreadsheet.
The IRS can audit rental income going back 3-6 years. Colorado follows similar rules. If you can't document your deductions, you lose them.
Professional property management creates a complete paper trail. Monthly owner statements, maintenance work orders with vendor invoices, income and expense ledgers by year. Your CPA can file your return in two hours instead of two days. Your audit exposure drops significantly because you have documentation for every dollar.
At Sheepdog, every owner account includes organized financial records specifically because we've watched out-of-state owners scramble at tax time without them. If you're managing a Denver property from across the country without professional management, you're carrying more risk than you may realize. Reach out here to talk through your situation.
Frequently Asked Questions
Do I have to file a Colorado tax return if I live in another state but own a rental property there?
Yes. If you earn any net income from Colorado rental property, you're required to file a Colorado nonresident income tax return (Form DR 0104) by April 15. This requirement exists regardless of where you live or how much you earned.
What is Colorado's income tax rate for non-residents?
Colorado has a flat 4.4% income tax rate. All taxpayers, residents and non-residents alike, pay the same rate on Colorado-source income. There are no income brackets.
What is the 2% Colorado withholding and does it apply to rental income?
The 2% withholding applies only when a nonresident sells Colorado real estate - it's withheld from the sale proceeds at closing. It does not apply to ongoing rental income. Many out-of-state owners confuse the two. Rental income has no automatic withholding; you're responsible for filing and paying your own return.
Can I deduct property management fees on my Colorado return?
Yes. Property management fees are a deductible rental expense that reduces your taxable net rental income. They flow through Schedule E on your federal return, which forms the basis of your Colorado nonresident return.
How does a 1031 exchange work if I'm a Colorado non-resident?
The federal 1031 rules apply the same way as for residents. The Colorado-specific consideration is the 2% withholding at closing, which your Qualified Intermediary needs to account for. The replacement property can be anywhere in the country, not just in Colorado.
What is Schedule E and do I need it?
Schedule E (Supplemental Income and Loss) is the federal form used to report rental income and expenses. If you own a rental property, yes, you need it. Your Colorado nonresident return uses Schedule E as its starting point to determine Colorado-source income.
What records should I keep as an out-of-state Colorado landlord?
Keep monthly rent ledgers, all repair and maintenance invoices, insurance documents, property tax bills, mortgage statements (for interest deduction), and copies of your lease agreements. The IRS can audit up to 6 years back in certain situations. Organized records make the difference.
Does Colorado require me to have a registered agent if I own property through an LLC?
If your LLC is registered in another state but owns Colorado real estate, you likely need to register as a foreign entity in Colorado, which requires a registered agent in-state. Talk to a Colorado business attorney or CPA about your specific situation.
Owning Colorado real estate from out of state isn't complicated, but it does require you to play by Colorado's rules. File the return, keep the records, and know what's coming when you eventually sell. The landlords who run into trouble are the ones who assume the absence of withholding means an absence of obligation.
If you'd rather have a professional handle the management side - so your records are clean, your compliance picture is clear, and you're not flying blind from across the country - that's exactly what we do.
