Colorado conforms to federal bonus depreciation. The 100% first-year deduction restored by federal law in 2025 flows straight onto your Colorado return, because the state starts from federal taxable income and has no add-back for depreciation.
As co-founder of Seneca Cost Segregation and a real estate investor myself, I’ve seen Colorado owners brace for a state adjustment that never comes. Investors who also hold property in California or New Jersey expect the same paperwork in Denver, and their CPAs are usually relieved to find a clean answer.
Below, I cover why Colorado follows the federal rule, how close the state came to changing it in 2026, and the few Colorado rules that still shape what a cost segregation study is worth to you.
TL;DR — Colorado Bonus Depreciation at a Glance
- ●Colorado keeps the full federal bonus deduction: individuals, pass-through owners, and C corporations report no depreciation add-back.
- ●In our illustrative $300,000 reclassification, the Colorado deduction is worth about $13,200 in year one: a decoupled state would allow roughly $42,000 of that deduction in the first year.
- ●One depreciation schedule serves both returns: you skip the second state ledger that owners in California, New Jersey, and Georgia carry.
- ●A 2026 bill to add bonus back from 2027 died in Senate Finance: owners placing property in service now face no Colorado adjustment under current law.
- ●Out-of-state owners still face their home state’s rules: a Colorado property held by a resident of a decoupled state can carry a home-state add-back.
- ●Recapture gets no Colorado break at sale: the state capital gain subtraction excludes depreciation recapture.
Does Colorado Conform to Bonus Depreciation?
Yes, for every filer type that owns real estate, and the reason sits in two places: the statute that defines the federal Code and the list of state additions.
How Colorado Ties Its Income Tax to the Internal Revenue Code
Colorado’s income tax law borrows the federal Code by reference and updates with it.
Section 39-22-103(5.3) of the Colorado Revised Statutes defines the Code as amended and “as the same may become effective at any time or from time to time, for the taxable year.” Both the individual and the corporate tax then begin from federal taxable income.
The One Big Beautiful Bill was signed on July 4, 2025, inside the 2025 tax year. Our explainer on the Big Beautiful Bill changes covers the January 19, 2025 acquisition date and the binding contract rule that decide eligibility.
What the Colorado Additions List Leaves Out
A state decouples by adding a deduction back, so the additions list is where any bonus adjustment would appear.
The Colorado Individual Income Tax Guide lists every required addition, including state income tax deducted federally, the overtime deduction from 2026, and the qualified business income deduction for higher earners. None of the items involves depreciation, bonus depreciation, or Section 179.
Colorado’s August 2025 special session responded to the federal law with a permanent QBI add-back, changes to foreign income rules, and a sales tax vendor fee repeal. Depreciation was left alone.
How Colorado Treats Bonus Depreciation by Filer Type
The answer holds across the ways real estate is usually owned, with one twist for owners who live elsewhere.
Individuals and Pass-Through Owners
Individuals start Form 104 with federal taxable income, so the bonus deduction is already inside the number.
Partnerships, S corporations, and multi-member LLCs pass the deduction through on the federal K-1, and the Colorado K-1 carries the state modifications. We see this consistently when coordinating with CPAs on Colorado filings: once they confirm no depreciation modification applies, the study’s federal schedule becomes the Colorado schedule too.
C Corporations
C corporations land in the same place under the corporate statute.
Colorado computes corporate taxable income from federal taxable income under C.R.S. 39-22-304, and Bloomberg Tax’s state chart lists Colorado as conforming to federal bonus depreciation. The corporate rate matches the individual rate at 4.4% for 2025.
Nonresidents Who Own Colorado Property
Owners who live outside Colorado report the property’s income to Colorado, and the depreciation travels with it.
The Colorado Department of Revenue treats income from real and tangible personal property located in the state as Colorado-source income. When a nonresident sells Colorado real property, the closing agent generally withholds the lesser of 2% of the sales price or the net proceeds.
Colorado vs Federal Bonus Depreciation Side by Side
Here is how Colorado lines up with the federal rules on the provisions that affect a property owner.
What the Failed 2026 Bill Would Have Changed
Colorado’s answer nearly flipped in 2026, which is the part most conformity charts leave out.
The Add-Back HB26-1222 Proposed
HB26-1222 would have required individuals and corporations to add back federal bonus depreciation above the amount allowed before the 2025 federal changes, starting with tax years beginning on or after January 1, 2027.
The bill also reached qualified production property, business interest, and domestic research costs. Taxpayers would have recovered the added-back amounts through subtractions beginning in 2028, spread over the periods the old rules used, with a 10-year carryforward.
The House passed the bill 42 to 23 on May 4, 2026. A week later, the Senate Finance Committee postponed it indefinitely on a 7 to 1 vote.
Why the Issue Could Return
The revenue at stake gives lawmakers a reason to revisit it.
The final fiscal note estimated the bonus depreciation add-back alone at $70.0 million for fiscal year 2026-27 and $111.7 million for 2027-28. Under rolling conformity, only a new bill can change Colorado’s treatment.
What Colorado Conformity Means on a Cost Segregation Study
The value of conformity shows up most clearly next to a state that requires the add-back.
Take a hypothetical study on a rental building placed in service after January 19, 2025 that reclassifies $300,000 of basis into $180,000 of 5-year property and $120,000 of 15-year land improvements. The comparison column uses the first-year rates in IRS Publication 946, which is roughly how a decoupled state would treat the same assets.
At Colorado’s 4.4% rate, the $300,000 deduction is worth about $13,200 on the 2025 state return, against about $1,848 under a no-bonus schedule. The remaining building basis follows the same 27.5- or 39-year schedule on both returns, and our guide to depreciation schedules for building components explains each class.
Colorado Rules That Still Shape the Result
Conformity settles the depreciation question, but three Colorado rules still decide how much of the benefit you keep.
The Credit for Tax Paid to Another State
Colorado residents with property in a decoupled state can run into a credit gap.
Under Department of Revenue Rule 39-22-108, the credit is figured only on income both states tax, and the other state’s bonus add-back is left out. The Department’s own example uses a resident with $10,000 of California business income and a $3,000 California bonus add-back, and Colorado counts $10,000.
The reverse case matters too. A California resident who owns a Denver rental claims bonus in Colorado but still adds it back at home, as our breakdown of California bonus depreciation conformity shows.
The Capital Gain Subtraction Excludes Recapture
Colorado’s capital gain subtraction offers no shelter for depreciation taken through a study.
The Department’s capital gain subtraction guidance bars the subtraction for any income treated as ordinary, including depreciation recapture. For tax years 2022 and later, real property qualifies only if it is classified as agricultural land.
Any recapture is taxed at Colorado’s flat rate along with the rest of the gain, so model the depreciation recapture tax rate on both returns before you plan a sale.
Passive Loss Limits Carry Over From the Federal Return
Colorado inherits whatever the federal passive activity rules allow.
A loss suspended on the federal return never reaches the Colorado starting point, and a real estate professional who deducts the loss federally carries the lower figure onto Form 104. Colorado’s QBI and deduction add-backs for high earners are measured on federal AGI, so a large allowed deduction can also change whether those add-backs apply.
Mistakes Colorado Owners Make With Bonus Depreciation
Most errors here come from carrying habits over from other states or assuming the rules will stay put.
- ●Adding bonus back on the Colorado return out of habit: owners with properties in decoupled states sometimes repeat the adjustment and overpay. Confirm no Colorado depreciation modification applies before filing.
- ●Assuming a Colorado property escapes a decoupled home state: your home state taxes all your income and applies its own depreciation rules. Keep a home-state schedule if you live in a state that adds bonus back.
- ●Expecting the other-state credit to cover an add-back: Colorado computes the credit without the other state’s bonus adjustment. Run the credit with your CPA before relying on it.
- ●Counting on the capital gain subtraction at sale: recapture never qualifies, and most rental property no longer does either. Budget for state tax on recapture.
- ●Treating the 2026 answer as permanent: HB26-1222 showed how quickly an add-back can advance. Review each new session before you commit to a placed-in-service date.
- ●Amending old returns for a missed study: the federal fix is Form 3115 with a Section 481(a) catch-up in the current year, and Colorado picks it up through federal taxable income. Share the report early using our notes on CPA integration of study results.
Frequently Asked Questions
Below are the questions Colorado owners and their CPAs ask us most about bonus depreciation on the state return.
How Seneca Supports Colorado Property Owners
Colorado’s conformity puts the full weight of the result on the engineering, since one schedule drives both returns. Our in-house engineers break down every component of the property, from an onsite or virtual tour, and our Head of Engineering signs off on each study before it reaches your CPA.
You work with a dedicated Project Manager, the Engineering team, and an Advisor, with real-time updates at each stage and audit defense included. We have assessed 10,200+ properties with zero IRS audits triggered or lost, and we also run Qualified Production Property studies for facilities that qualify.
To see what a study could mean for your Colorado property, run the numbers in our cost segregation calculator.
Conclusion
Colorado gives property owners one of the simplest answers in the country: the federal bonus deduction is the Colorado deduction. You avoid the add-back, the second schedule, and the delayed state benefit that owners in decoupled states carry.
The open questions sit at the edges, in multistate credits, recapture at sale, and whatever the next session brings. Bring your CPA in early, and reach out for a free estimate when you want the numbers run on your own property.
