A possible Colorado tax increase 2026 ballot outcome could become one of the most important tax planning issues for high-income households and retirees this year.
Colorado voters will consider two competing income tax measures on the November 2026 ballot. Initiative 195 would replace Colorado’s current flat 4.4% income tax with a graduated tax structure, while Initiative 232 would cap the state’s income tax rate at 4.4%.
The outcome could have very different implications for high-income earners, business owners, retirees with substantial investment income, and households approaching retirement.
If you’re retired and living from Social Security, pensions, IRA withdrawals, and investment accounts, or if you’re still working and receiving substantial compensation, it’s worth understanding how the proposed Colorado tax changes could affect your planning.
Understanding the Colorado Tax Increase 2026 Ballot Measures
Colorado currently has a flat individual income tax rate of 4.4%. The rate applies regardless of how much taxable income a taxpayer has, and it’s held at that level since voters approved Proposition 121 in 2022.
Initiative 195 would change that structure beginning with tax years starting January 1, 2027.
Under Initiative 195, Colorado would use six marginal income tax brackets:
| Colorado taxable income | Proposed marginal rate |
|---|---|
| Up to $25,000 | 3.7% |
| $25,001 to $100,000 | 4.2% |
| $100,001 to $500,000 | 4.4% |
| $500,001 to $750,000 | 7.4% |
| $750,001 to $1 million | 7.9% |
| More than $1 million | 8.4% |
These are marginal tax rates. Someone with $600,000 of taxable income wouldn’t pay 7.4% on the entire $600,000. The first $25,000 would be taxed at 3.7%, the next $75,000 at 4.2%, the next $400,000 at 4.4%, and only the final $100,000 would fall into the 7.4% bracket.
That distinction matters when estimating the actual effect of a Colorado tax increase on your own return.
Initiative 195 vs. Initiative 232
Initiative 195 would establish a graduated income tax, with rates ranging from 3.7% to 8.4%. The higher rates would apply to taxable income above $500,000. Legislative Council staff estimates the measure would increase state revenue by approximately $2 billion in fiscal year 2027-28, with a maximum estimated increase of $2.7 billion.
Initiative 232 would establish a statutory maximum income tax rate of 4.4% for both individuals and corporations beginning in 2027.
If both measures pass, the conflicting provisions get resolved based on which initiative receives more “yes” votes. The interaction between the measures could produce a situation in which some of Initiative 195’s lower rates remain in place while the higher rates are capped at 4.4%. That specific outcome hasn’t been tested in court and could face a legal challenge, so it isn’t a safe assumption to plan around.
For planning purposes, that means the final tax structure may not be settled the moment votes are counted.
What a Colorado Tax Increase Could Mean for Retirees
One of the biggest misconceptions is that a Colorado tax increase would primarily affect people who are still working. That’s not necessarily the case.
Retirement income can come from many sources, including:
- Traditional IRA withdrawals
- 401(k) distributions
- Pension income
- Taxable investment income
- Capital gains
- Business or partnership income
- Deferred compensation
- Stock compensation from a previous employer
- Social Security benefits that are taxable for federal purposes
There’s an important Colorado-specific detail worth knowing, though. Colorado income tax is calculated on taxable income after Colorado-specific additions and subtractions, not on every dollar of gross income you bring in. Certain Social Security, pension, and annuity income may qualify for Colorado subtractions depending on your age and circumstances. That means retirees shouldn’t just add up every source of cash flow and assume the full amount will be subject to the proposed brackets. The more important question is how much Colorado taxable income remains after those adjustments.
A Retiree Can Still Have a High-Income Tax Year
Even if your normal retirement income is nowhere near $500,000, a single year can look very different.
Consider a retiree who normally has $150,000 of taxable income but also has one of the following events in a given year:
- A large IRA distribution
- A substantial Roth conversion
- The sale of a highly appreciated stock position
- The sale of an investment property
- The sale of a business interest
- A large deferred compensation payment
That one-time event could push taxable income well above the retiree’s typical year. A household might have $150,000 of taxable income one year, $175,000 the next, and then $600,000 in a year when a major asset is sold or a large Roth conversion is completed. Under a flat 4.4% rate, the marginal rate doesn’t change when that happens. Under a graduated system, the portion of income above $500,000 could be taxed at a meaningfully higher marginal rate.
Roth Conversions Could Become More Important to Model
Roth conversions are already a common part of retirement tax planning. A retiree might convert money from a traditional IRA to a Roth IRA during the years between retirement and the start of required minimum distributions, paying income tax now in exchange for tax-free qualified withdrawals later.
A graduated Colorado income tax could make the size and timing of Roth conversions more important for some households. A household considering a $500,000 Roth conversion might want to compare converting the entire amount in one year against spreading the conversion across several tax years.
The federal tax consequences would still matter most, but Colorado’s marginal brackets could become another factor in the analysis. This doesn’t mean a large Roth conversion should automatically happen before 2027. The right decision depends on federal tax brackets, future income, expected RMDs, Medicare premium thresholds, estate planning, investment returns, and how likely you are to remain a Colorado resident. Roth conversion planning may simply need to incorporate Colorado’s potential tax changes rather than focusing on federal taxes alone.
Required Minimum Distributions Could Also Matter
Required minimum distributions, or RMDs, are another source of taxable retirement income that can spike in a given year. Someone with a large traditional IRA or 401(k) may eventually be required to take substantial annual distributions, and if other income is also present that year, the RMD can push taxable income higher still.
For example, a retiree might have $100,000 of taxable pension and investment income, a $200,000 RMD, and $150,000 of realized capital gains in the same year. That household could have a very different Colorado tax bill from a retiree with similar long-term wealth who realizes those same gains across separate years. This is one reason retirement income planning should look several years out rather than treating each tax return in isolation.
Capital Gains Could Become More Important for Colorado Investors
High-income retirees often hold substantial taxable investment accounts, concentrated stock positions, real estate, or ownership interests in private businesses. Selling an appreciated asset can create a large capital gain in a single year, and if Colorado adopts the proposed graduated system, the timing of that gain becomes more relevant since it contributes to the taxable income used to determine your marginal Colorado rate.
That could make multi-year strategies worth evaluating, such as selling a highly appreciated position over multiple tax years instead of all at once. There are plenty of reasons that might not be practical, including market risk, diversification needs, and federal capital gains considerations. Colorado’s potential tax structure is simply another factor worth modeling alongside those.
What About Selling a Home?
Selling a primary residence can also create an unusual tax year, though the federal home-sale exclusion can shelter a substantial amount of gain for those who qualify. The key distinction is between sale proceeds and taxable gain. Selling a $1.5 million home doesn’t automatically mean $1.5 million becomes subject to Colorado income tax. For homeowners with significant appreciation above the applicable exclusion, though, a home sale could still create a meaningful taxable gain in a single year, which is another reason major transactions deserve a look at the whole tax year rather than in isolation.
How High-Income Employees Could Be Affected
A Colorado tax increase may be even more noticeable for employees who regularly earn more than $500,000, including executives, physicians, attorneys, technology professionals, business owners, and other high-income households.
Equity compensation can complicate the picture further. Someone might receive restricted stock units, stock options, performance shares, a large annual bonus, deferred compensation, or shares connected to a company acquisition. A household with a $400,000 base salary might normally stay below the proposed higher brackets, but add a $200,000 bonus or a significant equity vesting event and the tax picture changes considerably, since the proposed higher rates apply to taxable income, not base salary alone. For anyone with highly variable compensation, that makes income forecasting and tax planning more important.
Common Sense Institute’s analysis points out that the top 3% of earners would see the largest impact, while about 97% of Coloradans would see a reduction or no change. If you fall into that top bracket, or expect to in a future year because of equity vesting, a sale, or a bonus structure, the planning conversation becomes about timing and sequencing income across years.
Business Owners May Also Need to Pay Attention
Business owners can see even larger year-to-year swings in taxable income than salaried employees, particularly if a business is sold or a significant distribution is received. Initiative 195 applies its graduated rates to individual and corporate taxpayers, and the specific consequences for a given owner depend on how the business is structured and how income flows to the individual return. Business owners approaching a sale should factor Colorado taxes into the broader exit-planning process well ahead of time.
Tax Planning Strategies to Consider If Initiative 195 Passes
If Initiative 195 takes effect, a few areas of planning become more valuable.
Roth conversion timing. Model conversions against projected federal and Colorado taxable income across several years rather than deciding on a single number in isolation.
Retirement withdrawal sequencing. The order you draw from taxable accounts, traditional retirement accounts, and Roth accounts affects taxable income each year. Under a graduated system, that sequencing carries more weight than it did under a flat 4.4% rate.
Capital gain timing. If you’re planning to sell a concentrated stock position, rental property, or business interest, compare recognizing the gain in one year versus spreading it across multiple years where that’s practical, alongside your investment and diversification goals.
Equity compensation planning. Employees with RSUs, options, or performance shares should look at expected vesting and exercise events alongside salary, bonuses, and other income, particularly in years with a promotion, bonus, or liquidity event layered on top.
Charitable giving. Larger charitable gifts, donor-advised fund contributions, or qualified charitable distributions from an IRA (for those 70½ and older) can help offset income in a year when a large distribution or gain would otherwise land in a higher bracket.
Trust and estate income. The proposed brackets apply to trusts and estates as well as individuals, so those involved in trust administration or estate planning should factor this into distribution timing and coordinate with an estate planning attorney.
Don’t Confuse the Marginal Rate With Your Overall Tax Rate
This point matters when evaluating Initiative 195. If the proposed 8.4% rate applies to taxable income above $1 million, that doesn’t mean someone earning $1.1 million pays 8.4% on the entire amount. Only the income within the highest bracket gets taxed at that rate. A taxpayer with $1.1 million of taxable income would have different portions taxed at 3.7%, 4.2%, 4.4%, 7.4%, 7.9%, and 8.4%, so the effective rate ends up lower than the 8.4% top marginal rate. That distinction is especially worth keeping in mind when comparing the proposed system with Colorado’s current 4.4% flat rate.
What Should Colorado Retirees Do Now?
It’s too early to restructure an entire retirement plan around a ballot measure that hasn’t taken effect. A few things are worth doing now, though.
First, understand how much Colorado taxable income you actually generate each year rather than relying on gross income or cash flow. Second, look several years ahead rather than focusing only on your next tax return, and identify potential income spikes from RMDs, Roth conversions, capital gains, business sales, equity compensation, or real estate transactions. Third, run the numbers under a few different scenarios: today’s 4.4% flat rate, the graduated rates under Initiative 195, the 4.4% cap under Initiative 232, and the possible combined outcome where Initiative 195’s lower rates remain while the higher rates stay capped, subject to the legal questions around that interpretation.
The goal isn’t to predict the election. It’s to understand which parts of your financial plan could be affected under each potential tax structure.
What to Watch Before the November Election
Final ballot language and official guidance. The Colorado Secretary of State and Legislative Council will provide the official election materials for both measures.
Tax guidance. If a new graduated system takes effect, the Colorado Department of Revenue will need to issue guidance on implementation, withholding, and estimated payments.
Legal questions. If both measures pass, the interaction between their conflicting provisions could require additional legal interpretation before it’s fully settled.
Federal tax changes. Colorado generally starts its individual income tax calculation with federal taxable income and then applies Colorado-specific modifications, so changes to federal tax law can affect Colorado taxable income too.
Your own projected income. Regardless of the political outcome, households approaching retirement should understand when their largest taxable income years are likely to occur.
Bottom Line: A Colorado Tax Increase Could Affect Retirement Planning
Colorado’s 2026 income tax ballot measures could have meaningful implications for retirees, high-income professionals, business owners, and households with substantial investment or equity compensation income. Initiative 195 would replace the state’s current 4.4% flat income tax with a graduated structure ranging from 3.7% to 8.4%, while Initiative 232 would cap the income tax rate at 4.4%. If both pass, the measure receiving more “yes” votes controls the conflicting provisions, though the exact interaction could face legal challenges.
For retirees, the question isn’t simply whether you’re still working. RMDs, Roth conversions, capital gains, and other lumpy income events can cause significant year-to-year changes in taxable income. For high-income employees, bonuses and equity compensation can have a similar effect.
The most useful step is to understand your potential taxable income several years into the future and identify where large income events could occur. If Colorado changes its tax structure, that analysis can then be updated with the actual rules rather than trying to make major decisions based on speculation.
If you’re a Colorado resident approaching retirement or already retired and you’re concerned about how a Colorado tax increase could affect Roth conversions, retirement withdrawals, capital gains, or other income, now is a reasonable time to begin modeling the possibilities.
Sources
- Common Sense Institute, “Colorado Initiative 232: Income Tax Rate Cap,” August 3, 2026. https://commonsenseinstituteus.org/research/colorado-initiative-232-income-tax-rate-cap/
- Common Sense Institute, “How Initiative 195’s Progressive Tax Structure Would Affect Colorado’s Economy.” https://commonsenseinstituteus.org/colorado/research/taxes-and-fees/how-initiative-195s-progressive-tax-structure-would-affect-colorados-economy/
- Colorado General Assembly, Initiative #195 Final Text (effective date provision). https://leg.colorado.gov/initiative_files/95/download
- Colorado Department of Revenue, Colorado Individual Income Tax Guide, revised January 2026. https://tax.colorado.gov/sites/tax/files/documents/Individual_Income_Tax_Guide_January_2026.pdf
- The Colorado Sun, “Colorado voters will be asked in November to amend state constitution, impose graduated income tax system,” September 1, 2026. https://coloradosun.com/2026/09/01/colorado-graduated-income-tax-ballot-measures-2026/
- Colorado Newsline, “Colorado graduated income tax proposal qualifies for 2026 ballot,” September 1, 2026. https://coloradonewsline.com/2026/09/01/colorado-graduated-income-tax/
- Colorado Secretary of State, Results for Proposed Initiative #195. https://www.coloradosos.gov/pubs/elections/Initiatives/titleBoard/results/2025-2026/195Results.html
About the Author
Gabriel Motta, CFP®, MBA, is the founder and principal of Inclinevest LLC, a fee-only fiduciary retirement financial advisor and financial planner based in Greenwood Village, Colorado. He works with high-net-worth pre-retirees and retirees throughout south Denver, across Colorado, and nationally, including clients in Highlands Ranch, Centennial, Lone Tree, Aurora, Parker, Castle Rock, and Littleton. As a retirement planner and wealth manager, Gabriel helps clients navigate retirement income planning, Social Security strategy, tax-efficient withdrawals, and equity compensation. Gabriel is a NAPFA and XY Planning Network member. Learn more at inclinevest.com or schedule a conversation.
This article is for general informational and educational purposes only. It isn’t personalized investment, tax, or legal advice, and it shouldn’t be relied on as a substitute for guidance specific to your situation. Inclinevest LLC is a registered investment adviser. Registration doesn’t imply any level of skill or training. Please consult a qualified professional before making decisions about your own financial circumstances.
