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Capital Gains Tax Calculator for Boulder, CO
Local data pre-filled
Capital gains tax in Boulder, CO depends on your federal rate plus Colorado state taxes. Long-term gains (assets held >1 year) receive preferential federal rates of 0%, 15%, or 20%.
Data as of · Sources: Zillow, Census ACS, Tax Foundation, Freddie Mac
Colorado Financial Snapshot (2026) — Capital Gains Tax Calculator
Bracket stack and standard deduction are the primary inputs for the capital gains tax calculator in Colorado.
How the Capital Gains Tax Calculator Math Works Under Colorado Law
Your Colorado capital gains tax calculator stacks federal and state income tax onto FICA (Social Security 6.2% + Medicare 1.45%). Colorado's 2026 structure is flat, with a top marginal rate of 4.40%[1]. Standard deduction for single filers: $15,000. Married filing jointly: $30,000.
| Taxable income (single) | Marginal rate |
|---|---|
| $0+ | 4.40% |
Calc-specific note: Federal LT rate (0/15/20%) stacks on top of Colorado's ordinary-income rate — there's no separate state capital gains bracket.
Worked example — Colorado
A Colorado investor realising $84,000 in long-term capital gains (15% on a $560,000 position) pays 15% federal ($12,600) plus 4.40% state ($3,696) = $16,296 combined. The 3.8% NIIT may apply above $200k MAGI.
Local context: Boulder, CO
Housing economics in Boulder, CO. The median home value runs 102.5% above the U.S. baseline for Boulder, CO is $725,121 per Zillow's home-value index. Median rent runs $2,216 a month per Zillow ZORI, a premium over the national $1,850 baseline. Effective property tax sits at 0.60% of assessed value, below the 0.99% national average tracked by the Tax Foundation.
Income and tax climate. Colorado's top marginal state income tax bracket lands at 4.63% — compared to the volume-weighted national average around 4-5%. BEA's Regional Price Parity scores Boulder, CO at 132.0 (national = 100), meaning a dollar in Boulder, CO buys 76¢ of national purchasing power.
Local context as of 2026-04-19.
Boulder versus the U.S. baseline
| Metric | Boulder, CO | U.S. baseline | Difference |
|---|---|---|---|
| Median home value[zillow] | $725,121 | $358,000 | 102.5% |
| Median monthly rent[zillow] | $2,216 | $1,850 | 19.8% |
| Property tax (effective)[tax-foundation] | 0.60% | 0.99% | -39.4% |
| State top marginal income tax[tax-foundation] | 4.63% | ~4.08% (volume-weighted) | 0.5 pp |
| State cost-of-living index[bea-rpp] | 132.0 | 100.0 | 32.0 pts |
How to use the Capital Gains Tax Calculator
Walk through using the Capital Gains Tax Calculator with Boulder, CO-specific defaults pre-loaded from primary sources.
- Enter your Boulder numbersFill in the capital gains tax inputs. Defaults reflect Boulder, CO 2026: median home $725,121, median rent $2,216/mo, 0.60% effective property tax.
- Apply the local 2026 inputsThe median home value in Boulder is $725,121 (Zillow ZHVI), with median monthly rent running $2,216/mo.
- Compare against Boulder contextMonthly PITI on the $725,121 median home in Boulder is ~$4,411/mo — vs a $2,216/mo median rent.
How Colorado Compares to Neighboring States
| State | Median home | Top inc tax | Prop tax rate | RPP (US=100) |
|---|---|---|---|---|
| Colorado (this page) | $560,000 | 4.40% | 0.51% | 101.9 |
| Arizona equivalent | $430,000 | 2.50% | 0.66% | 100.7 |
| compare to Kansas | $225,000 | 5.58% | 1.41% | 89.9 |
| compare to Nebraska | $265,000 | 5.20% | 1.73% | 90.3 |
| New Mexico | $305,000 | 5.90% | 0.80% | 91.0 |
Sources: Zillow ZHVI[1], state Departments of Revenue / Tax Foundation[2], Tax Foundation property taxes[3], BEA Regional Price Parities[4].
What Changes Your Result in Colorado
- Marginal vs effective rate:Top marginal rate (4.40%) applies to the last dollar earned above the top bracket floor. Your effective rate — total state tax divided by taxable income — will be lower for most filers.
Related Calculations for Colorado
- Income Tax Calculator for Colorado — capital gains can stack into taxable income.
How Boulder Compares to the National Average
Understanding how Boulder stacks up helps you calibrate your financial planning.
| Metric | Boulder, CO | US Average | Difference |
|---|---|---|---|
| Median Home Price | $725,121 | $420,800 | +72.3% |
| Median Monthly Rent | $2,216 | $1,713 | +29.4% |
| Median Household Income | $102,772 | $74,580 | +37.8% |
| Property Tax Rate | 0.60% | 1.10% | -45.5% |
| Cost of Living Index | 132 | 100 | +32.0% |
Sources: U.S. Census Bureau, BLS, Zillow, NAR (2024–2025). Green = favorable for residents; red = less favorable.
Boulder Financial Snapshot
- Population (Metro)
- 108,000
- Unemployment
- 3.3%
- Avg Commute
- 23 min
- Median Age
- 29.8
- Price-to-Rent Ratio
- 27.3x
- Annual Property Tax
- $4,351
More Financial Calculators for Boulder, CO
Capital Gains Tax Calculator in Other Colorado Cities
Frequently Asked Questions — Boulder
- Can median-income households afford the median home in Boulder?
- With a ~$4,411 monthly PITI and $102,772 median income, housing would consume ~51.5% of gross annual income. Qualifying under the 28% DTI rule requires ~$189,043 in annual income. Educational reference only.
- Is it better to rent or buy in Boulder?
- Boulder's price-to-rent ratio (27.3x) tilts toward renting — above 20x, buying is generally expensive relative to renting.
- What is the annual property tax bill on the median home in Boulder?
- Approximately $4,351/yr at the 0.60% effective rate on the $725,121 median home. The national average effective rate is 1.07%.
- What share of median income goes to rent in Boulder?
- The $2,216/mo median rent represents 25.9% of the $102,772 median household income. The recommended housing cost threshold is 30%; Boulder falls within that guideline. Educational reference only.
- How much does commuting cost in Boulder?
- Average commute time in Boulder is 23 minutes per ACS. Estimated annual commute cost runs about $4,007. Educational reference only.
- How does the cost of living in Boulder compare to the national average?
- Boulder's BEA RPP index is 132, 32% above the national baseline of 100. For a household earning the national median income of $77,540, this translates to ~$24,813/yr in purchasing power difference. Educational reference only.
- What is the median home price in Boulder, CO?
- The median home price in Boulder is $725,121 as of 2025–2026.
- What is the average rent in Boulder?
- The median monthly rent in Boulder, CO is $2,216.
- Does the capital gains tax replace professional advice?
- No. This calculator gives educational estimates using public Boulder data and standard formulas. It is not personalized tax, legal, or investment advice. Consult a licensed professional for decisions with material consequences.
Colorado State Context
Colorado Real Estate Tips
Colorado's median home price of $525,000 is 25% above the national average, driven by Denver/Boulder metro demand.
CHFA (Colorado Housing and Finance Authority) offers down payment assistance up to $25,000 for first-time buyers.
Colorado's low property tax rate (0.51%) is among the lowest in the nation — the Gallagher Amendment historically capped residential assessment rates.
Mountain properties may require well/septic systems and have limited access during winter — factor in maintenance costs.
Colorado Homebuyer Programs
- ✓CHFA Down Payment Assistance — up to $25,000 as a second mortgage or grant depending on the program.
- ✓CHFA SectionEight Homeownership Program — helps voucher holders transition to homeownership.
- ✓Metro Mortgage Assistance Plus — grants up to 4% of the first mortgage for Denver metro buyers.
Statewide Colorado figures apply broadly across Boulder. County- and city-level variation can be significant — verify against local sources before closing a transaction. [3]
How we compute this — methodology
The Boulder page uses local median home price ($725,121), median rent ($2,216/mo), and property tax rate (0.60%) alongside the calculator's client-side formula. Calculations run in your browser — no inputs are sent to a server.
Known limits: ZIP-level variance within Boulder can be substantial — the figures shown are city-wide medians. For a precise property tax quote, consult your county assessor.
Sources
- Zillow Research — ZHVI (Zillow Home Value Index) + ZORI (Zillow Observed Rent Index), city-level. zillow.com/research/data. Retrieved 2026-04-19.
- U.S. Census Bureau — American Community Survey (ACS) 5-year estimates for median household income and population. census.gov/programs-surveys/acs.
- CalcFi state financial context — tips + first-time homebuyer programs compiled from each state's Housing Finance Authority (HFA) public pages. See
src/data/state-financial-context.ts. - Tax Foundation — state property tax effective rates and state/local sales tax rates. taxfoundation.org.
- Freddie Mac Primary Mortgage Market Survey (PMMS) — weekly national mortgage rate averages used by mortgage-related calculators. freddiemac.com/pmms.
- Internal Revenue Service — federal individual income tax brackets and standard deductions — www.irs.gov/forms-pubs/about-publication-17. Retrieved 2026-04-19.
- State Departments of Revenue — official bracket + deduction publications (one primary URL per state; linked in the brackets table below) — taxfoundation.org/data/all/state/state-income-tax-rates. Retrieved 2026-04-19.
- Social Security Administration — OASDI / Medicare benefit + contribution rules — www.ssa.gov. Retrieved 2026-04-19.
- BLS Occupational Employment and Wage Statistics (OEWS) — state-level occupational wages — www.bls.gov/oes. Retrieved 2026-04-19.
- Freddie Mac Primary Mortgage Market Survey (PMMS) — weekly national mortgage rates — www.freddiemac.com/pmms. Retrieved 2026-04-19.
- NAIC Dwelling Fire, Homeowners Owners, and Homeowners Tenants Insurance Report — content.naic.org/article/homeowners-insurance-report. Retrieved 2026-04-19.
- Bureau of Economic Analysis — Regional Price Parities by State — www.bea.gov/data/prices-inflation/regional-price-parities-state-and-metro-area. Retrieved 2026-04-19.
- U.S. Department of Labor — State Minimum Wage Laws — www.dol.gov/agencies/whd/minimum-wage/state. Retrieved 2026-04-19.
- FRED (Federal Reserve Economic Data) — real median household income, unemployment, HPI, LFPR per state — fred.stlouisfed.org. Retrieved 2026-04-19.
Spot an error? Email [email protected] with the URL and the correct figure.
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National reference: Capital Gains Tax Calculator