Colorado Rent Calculator

Pri Geens

Pri Geens

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Colorado Rent Calculator

Colorado taxes wages at a single flat 4.40 percent on federal taxable income and adds a 0.45 percent FAMLI payroll charge on every wage dollar, while SB23-184 caps the security deposit at two months and pet rent at the greater of $35 or 1.5 percent of rent. This calculator sizes the rent that income supports against both the 30 percent standard and the income ratio your landlord publishes, prices the cash you need at signing under those caps, and benchmarks your rent against the HUD Fair Market Rent for your county.

What Do You Want To Calculate?

The second and third modes require a target monthly rent. The third solves for annual salary.

Location and Unit

Select the county where you will rent.
Selects the HUD FY 2025 Fair Market Rent for your county.
Select a county to load its HUD Fair Market Rent schedule and the income a published screening ratio would require at that benchmark.

Household Income

Wages before tax from every household earner. Colorado applies one flat 4.40 percent rate to federal taxable income plus a 0.45 percent FAMLI charge on all wages, with no municipal wage tax. Enter your annual gross household salary.
Child support, pension, Social Security or a side income. Enter 0 or more.
401(k), 403(b), 457 or traditional IRA. Reduces federal and Colorado taxable income but not FICA or FAMLI wages. Enter 0 or more.
Sets the federal standard deduction that Colorado taxable income inherits.
Drives the $2,000 federal child tax credit for the first three. Colorado dependent credits are small and are not modeled here. Enter 0 to 10.
Base rent of the listing, before utilities and fees. Enter a target monthly rent greater than 0.
Colorado sets no statutory income ratio, so the figure in the landlord’s written screening criteria governs.

Monthly Money Commitments

Minimum credit card payments, auto loans, student loans and support obligations. Counted in the debt-to-income ratio. Enter 0 or more.
Enter 0 or more.
Groceries, fuel, insurance, phone, internet, childcare and health costs. Leaving this at zero overstates the rent you can carry. Enter 0 or more.

Housing Add-Ons

HUD publishes Fair Market Rent as a gross rent, so this figure is added back for that comparison. Enter 0 or more.
Enter 0 or more.
SB23-184 caps monthly pet rent at the greater of $35 or 1.5 percent of monthly rent; amounts above the cap are reduced below. Enter 0 or more.
Enter 0 or more.

Cash Required At Signing

SB23-184 caps the security deposit at two monthly rent payments.
Prepaid rent counts toward the same two-month combined cap as the security deposit.
SB23-184 caps a pet deposit at $300; amounts above are reduced below. Enter 0 or more.
C.R.S. 38-12-903 allows only the actual cost of screening, and no fee at all if you supply a portable tenant screening report. Enter 0 or more.
Enter 1 to 10.
Movers or truck, deposits to activate utilities, locks and basic supplies. Enter 0 or more.

Lease Term and Renewal

Rent cannot be raised during a fixed term. C.R.S. 38-12-701 requires 30 days written notice under a 10 percent increase and 60 days at or above 10 percent.
Colorado imposes no statutory renewal cap, so this is a planning assumption only. Enter 0 to 50.
Colorado rules this calculator enforces: SB23-184 caps the security deposit at two monthly rent payments and requires an itemized return within 30 days after the tenancy ends, extendable to no more than 60 days only if the lease states the longer period. The same act caps a pet deposit at $300 and monthly pet rent at the greater of $35 or 1.5 percent of monthly rent. C.R.S. 38-12-903 and the Rental Application Fairness Act allow an application fee only to the extent it actually covers screening costs and bar any fee when you supply a portable tenant screening report. C.R.S. 38-12-701 requires 30 days written notice for an increase under 10 percent and 60 days at or above 10 percent, with 60 days for month-to-month tenancies that have no written lease. Colorado has no rent control, no statutory renewal cap and no statewide just cause requirement for market-rate periodic tenancies.

Understanding Rent Affordability in Colorado

Colorado pairs mountain-resort rent levels with a flat income tax and a payroll charge most states lack, so the gap between what a landlord will approve and what you can actually carry is wide along the Front Range and in the resort counties.
  • Colorado taxes all taxable income at a single flat rate of 4.40 percent for tax year 2025, applied to federal taxable income with state modifications. Because the state deduction is inherited from the federal return, pre-tax retirement contributions reduce Colorado tax dollar for dollar with federal tax.
  • The FAMLI program adds a further 0.45 percent employee share of all wages with no wage cap, a payroll charge that has no counterpart in most other states and that reduces take-home pay before rent is ever considered.
  • The 30 percent affordability standard requires annual income equal to 40 times the monthly rent, while the 3 times monthly ratio most Colorado landlords publish requires only 36 times. Test case 3 shows a household that clears the 3x screen yet spends 37.06 percent of gross on housing at the Fort Collins-area Fair Market Rent.
  • SB23-184 caps the security deposit at two monthly rent payments and requires an itemized return within 30 days after the tenancy ends, extendable to 60 days only if the lease states the longer period. The same act caps a pet deposit at $300 and monthly pet rent at the greater of $35 or 1.5 percent of monthly rent.
  • C.R.S. 38-12-903 and the Rental Application Fairness Act allow an application fee only to the extent it actually covers screening costs, and bar any fee when you supply a portable tenant screening report, so a per-applicant fee well above actual cost should be questioned.
  • Colorado has no rent control and no locality imposes one, and there is no statewide just cause requirement for market-rate periodic tenancies. The only constraints on an increase are the lease term and the C.R.S. 38-12-701 notice clock of 30 days under 10 percent and 60 days at or above 10 percent.
  • Colorado’s FY 2025 two-bedroom Fair Market Rent ranges from $933 across the eastern plains counties to $2,291 in Summit County and $4,223-equivalent resort markets, with the Denver metro at $2,140, Boulder at $2,059, Fort Collins at $1,695, Colorado Springs at $1,778 and Pueblo at $1,258 against a $1,288 statewide average.

Sources, Methodology and Verification

Data Years

  • HUD Fair Market Rents: federal fiscal year 2025, all 64 Colorado counties and FMR areas.
  • Federal, Colorado income tax and FAMLI figures: tax year 2025.
  • Housing statutes: Colorado Revised Statutes Title 38 and SB23-184 as current through 2026.

Primary Sources

  • SB23-184, Protections for Residential Tenants – two-month security deposit cap, 30-day itemized return extendable to 60 days only by lease term, $300 pet deposit cap and pet rent capped at the greater of $35 or 1.5 percent of monthly rent.
  • Colorado Revised Statutes 38-12-701 (30-day notice under a 10 percent increase, 60 days at or above 10 percent, 60 days for month-to-month without a written lease) and 38-12-903 with the Rental Application Fairness Act (HB19-1106 as amended) on application fees and portable screening reports.
  • Colorado Department of Revenue, individual income tax guide confirming the flat 4.40 percent rate for tax year 2025 applied to federal taxable income.
  • Colorado FAMLI, 2025 premium of 0.9 percent of wages split evenly so the employee share is 0.45 percent with no wage cap.
  • U.S. Department of Housing and Urban Development, FY 2025 Fair Market Rents for Colorado, huduser.gov.
  • Internal Revenue Service Publication 15 and Publication 15-T for 2025.

Methodology Notes

  • Recommended maximum rent is the lowest of the 30 percent gross rule, the after-tax budget rule and the debt-to-income rule. The screening ratio ceiling is reported separately as an approval test.
  • The take-home engine applies federal tax first, then FICA, then Colorado income tax at a flat 4.40 percent of federal taxable income, then the FAMLI employee share at 0.45 percent of all wages with no cap. No municipal wage tax is modeled; the Denver occupational privilege tax is a small flat monthly charge left out.
  • Deposit clamping preserves prepaid rent first and reduces the security deposit so the combined total equals two months under SB23-184. Pet deposits are clamped to $300 and pet rent to the greater of $35 or 1.5 percent of monthly rent.
  • Required-income mode uses a guarded bisection solver with 60 bound expansions and 90 iterations, rounded up to the next whole dollar, evaluated against the recommended affordability figure rather than a fixed multiple.
  • Fair Market Rent comparisons add tenant-paid utilities to base rent because HUD publishes FMR as a gross rent.
  • Not modeled: Colorado itemized deductions and state tax credits, the Denver occupational privilege tax, and local municipal lodging or sales taxes, none of which apply to wage withholding.

Verification Test Cases

TC1 – Denver County, 1 bedroom, single, $80,000 with $4,000 pre-tax, $350 debts, $400 savings, $1,200 other living, $140 utilities, $18 insurance, $50 screening fee, one-month deposit, $700 moving, 3x ratio, affordability modeFederal tax $8,334.00, Social Security $4,960.00, Medicare $1,160.00, Colorado tax $2,684.00 on $61,000 of federal taxable income, FAMLI $360.00, net annual $58,502.00 and net monthly $4,875.17. Rules: 30 percent $2,000.00, 3x ceiling $2,222.22, DTI $2,358.67, budget $2,767.17. Recommended $2,000.00 with the 30 percent rule binding. Total housing $2,158.00 is 32.37 percent of gross and 44.26 percent of net, cost-burdened. Cash at signing $4,750.00. Denver 1 bedroom FMR $1,789.00, exceeded by $351.00.
TC2 – El Paso County (Colorado Springs), 2 bedroom, married filing jointly, $95,000 with 2 dependents and $5,000 pre-tax, target rent $1,778 equal to the area Fair Market Rent, two-month deposit (the legal maximum)Federal tax $4,114.00 after the $4,000 child tax credit, Social Security $5,890.00, Medicare $1,377.50, Colorado tax $2,640.00 on $60,000 of federal taxable income, FAMLI $427.50, net annual $75,551.00 and net monthly $6,295.92. The target passes the 3x ceiling of $2,638.89, the 30 percent test at 24.61 percent of gross, DTI at 30.29 percent and the budget test with $2,097.92 discretionary. The $3,556.00 two-month deposit sits exactly at the SB23-184 cap. Cash at signing $6,224.00.
TC3 – Larimer County (Fort Collins), 2 bedroom, single, $60,000 with $2,500 pre-tax, target rent $1,695 equal to the area Fair Market RentRecommended maximum is $1,500.00. The target clears the 3x screen, which requires $61,020.00, yet consumes 37.06 percent of gross and 47.84 percent of net pay and pushes total DTI to 43.06 percent against a 43 percent ceiling, leaving $420.21 discretionary. Cash at signing $4,030.00. Verdict approvable but cost-burdened.
TC4 – Pueblo County, 1 bedroom, single, target rent $1,100, 3x ratio, $200 debts, $250 savings, $850 other living, $120 utilities, $15 insurance, income modeSolved required annual salary $44,000.00, which makes the 30 percent rule bind at exactly $1,100.00. At that salary federal tax is $3,241.50, Social Security $2,728.00, Medicare $638.00, Colorado tax $1,276.00 on $29,000 of federal taxable income, FAMLI $198.00 and net monthly $2,993.21. Total housing is $1,235.00 or 33.68 percent of gross, DTI is 39.14 percent and cash at signing is $2,735.00. Pueblo 1 bedroom FMR is $959.00, exceeded by $261.00.
TC5 – Boulder County, 1 bedroom, head of household, $100,000 with 1 dependent and $6,000 pre-tax, target rent $1,702 equal to the area Fair Market Rent, landlord requesting a two-month deposit plus one month prepaid rentThe requested three months of combined deposit and prepaid rent is clamped to the two-month cap of SB23-184: prepaid rent is preserved at $1,702.00 and the deposit is reduced from $3,404.00 to $1,702.00, bringing cash at signing to $6,061.00. Federal tax $8,644.00 after the $2,000 child tax credit, Social Security $6,200.00, Medicare $1,450.00, Colorado tax $3,146.00 on $71,500 of federal taxable income, FAMLI $450.00, net annual $74,110.00 and net monthly $6,175.83. The target is affordable at 22.51 percent of gross and 30.34 percent of net, DTI 27.29 percent, with $1,901.83 discretionary.
Estimates only. Based on HUD fiscal year 2025 Fair Market Rents, tax year 2025 federal, Colorado income tax and FAMLI rates, and the Colorado Revised Statutes and SB23-184 as current through 2026. Not legal, tax, or financial advice.

What Is the Colorado Rent Calculator?

The Colorado Rent Calculator is a budgeting and rental-screening tool with three calculation modes. It can estimate your recommended maximum base rent, check whether a specific rent fits your finances and a landlord income ratio, or solve for the annual gross salary needed to support a target rent.

This calculator compares rent against 30 percent of gross income, an after-tax household budget, and a selected debt-to-income ceiling. It separately shows the landlord screening ratio, estimated take-home pay, total housing costs, move-in cash, HUD Fair Market Rent, and a three-year renewal projection.

The tool is designed for Colorado renters who want more context than a simple income multiple. Its calculations include tax year 2025 federal and Colorado assumptions, a 0.45 percent employee FAMLI charge, tenant-paid housing add-ons, debts, savings goals, living costs, deposits, screening fees, and moving expenses.

How the Colorado Rent Affordability Formula Works

The calculator starts with annual salary plus annualized other monthly household income. If W is annual salary and O is other monthly income, gross monthly household income G is:

G=(W+12O)/12G=(W+12O)/12

It then calculates three possible maximum base rents. The 30 percent rule is:

R30=0.30GR_{30}=0.30G

The debt-to-income limit subtracts monthly debts and housing add-ons from the selected DTI allowance:

RDTI=Gd−D−AR_{DTI}=Gd-D-A

The after-tax budget subtracts debts, savings, other living expenses, and housing add-ons from monthly take-home pay:

Rbudget=N−D−V−L−AR_{budget}=N-D-V-L-A

The recommended maximum is the lowest of those three results, with negative results replaced by zero:

Rrecommended=max⁡(0,min⁡(R30,Rbudget,RDTI))R_{recommended}=\max(0,\min(R_{30},R_{budget},R_{DTI}))

Here, d is the selected DTI ceiling, D is monthly debt, V is the savings target, L is other living expenses, and A includes tenant-paid utilities, renters insurance, allowed pet rent, and parking or storage. N is monthly take-home pay from salary after the calculator's estimated taxes, payroll charges, and pre-tax retirement contribution.

The landlord screening ceiling is calculated separately and does not determine the recommended maximum:

Rscreen=G/qR_{screen}=G/q

For example, the code's Denver test case uses an $80,000 salary, $4,000 of pre-tax retirement contributions, $350 of monthly debt, $400 of savings, $1,200 of living expenses, $140 of utilities, and $18 of renters insurance. Estimated monthly take-home pay is $4,875.17. The three affordability limits are $2,000.00 under the 30 percent rule, $2,358.67 under the 43 percent DTI test, and $2,767.17 under the after-tax budget. The recommended base rent is therefore $2,000.00.

How to Use the Colorado Rent Calculator: Step by Step

  1. Choose a calculator mode. Select maximum affordable rent, check a specific rent, or calculate the income required for a target rent.
  2. Select your Colorado county and unit size from studio through four bedrooms. These choices set the HUD FY 2025 Fair Market Rent benchmark.
  3. Enter annual gross household salary, other monthly household income, annual pre-tax retirement contributions, filing status, and dependents claimed.
  4. If you are checking or solving for a specific rent, enter the target base rent. Then choose the landlord's published income ratio of 2.5x, 3x, 3.5x, or 4x monthly rent.
  5. Enter monthly debt payments, your savings target, other living expenses, and the DTI ceiling you want to test. Available DTI choices are 36 percent, 43 percent, and 50 percent.
  6. Enter housing add-ons. These include tenant-paid utilities, renters insurance, pet rent, and parking or storage. Mark utilities as included if you do not pay the entered utility amount separately.
  7. Add move-in details. Enter the requested security deposit, prepaid rent, pet deposit, application fee per adult, number of adult applicants, and moving costs.
  8. Select a fixed-term or month-to-month lease and enter an expected annual renewal increase from 0 to 50 percent. Read and check the acknowledgment box, then calculate.

Your results separate the recommended rent from the landlord screening limit. They also show estimated take-home pay, total monthly housing cost, gross and net housing percentages, DTI, remaining monthly cash, move-in costs, Fair Market Rent comparison, and renewal estimates. Passing one test does not mean you will pass every test.

What Your Colorado Rent Calculator Result Means

Approval and affordability are separate tests

The calculator deliberately separates the landlord screening ratio from its recommended maximum rent. A 3x screening ratio means gross monthly income must equal three times the base rent. That corresponds to annual income of 36 times monthly rent. The calculator's 30 percent gross-income rule is stricter because it requires annual income equal to 40 times monthly rent.

ResultHow the calculator uses it
Recommended maximum rentLowest of the 30 percent rule, after-tax budget limit, and DTI limit
Screening ceilingGross monthly household income divided by the selected landlord ratio
Total housing costBase rent plus applicable utilities, insurance, allowed pet rent, and parking
Move-in cashFirst month's rent plus allowed deposit, prepaid rent, pet deposit, screening fees, and moving costs
Fair Market Rent comparisonCompares HUD FY 2025 FMR with base rent plus tenant-paid utilities
Three-year rent totalApplies the entered renewal increase to years two and three

How the calculator estimates take-home pay

The salary tax engine uses 2025 federal brackets and standard deductions of $15,000 for single filers, $30,000 for married filing jointly, and $22,500 for head of household. It subtracts a $2,000 federal child tax credit for up to the first three dependents, with federal income tax floored at zero.

It also applies Social Security at 6.2 percent up to $176,100 of salary, Medicare at 1.45 percent, and an additional 0.9 percent above $200,000. Colorado income tax is calculated as 4.40 percent of federal taxable income. FAMLI is calculated as 0.45 percent of salary with no wage cap in the code.

Pre-tax retirement contributions reduce federal and Colorado taxable income in this model, but they do not reduce Social Security, Medicare, or FAMLI wages. The contribution used in the calculation cannot exceed the entered salary.

Move-in costs and built-in Colorado limits

The calculator is coded to limit the combined security deposit and prepaid rent to two months of base rent. If the requested combination is higher, it preserves prepaid rent first and reduces the security deposit. It also caps the entered pet deposit at $300 and pet rent at the greater of $35 or 1.5 percent of monthly rent.

Application or screening fees are multiplied by the number of adult applicants. The calculator then adds first month's rent, the allowed security deposit, allowed prepaid rent, allowed pet deposit, total screening fees, and moving costs to estimate cash required at signing.

Important calculation limitations

Other monthly household income is annualized for gross-income calculations, including the 30 percent rule and screening ratio. However, the code does not add that income to monthly take-home pay used by the after-tax budget. Only salary goes through the take-home engine.

Required-income mode uses a bisection solver. It repeatedly tests salaries until the recommended maximum rent reaches the entered target, then rounds the required salary up to the next whole dollar. The interface still requires the salary field to contain a nonnegative value before calculation, even though the solver replaces that salary during its search.

In maximum-rent mode, the first affordability pass uses a $35 pet-rent ceiling because no target rent exists yet. After a recommended rent is found, the displayed housing total recalculates the pet-rent ceiling using that rent. This can create a small difference if 1.5 percent of the resulting rent is above $35.

The tool uses tax year 2025 rates and HUD FY 2025 Fair Market Rents. It does not model Colorado itemized deductions, state tax credits, the Denver occupational privilege tax, or every possible rental charge. Its legal benchmark outputs also rely on rules built into the code and may not reflect later changes in law.

Frequently Asked Questions

How much rent can I afford in Colorado?

The calculator recommends the lowest rent produced by three tests: 30 percent of gross monthly income, your selected DTI ceiling, and your after-tax monthly budget. The landlord screening ratio is shown separately. Your result therefore depends on income, debts, savings, living expenses, and housing add-ons.

What income do I need to afford rent in Colorado?

Select the required-income mode and enter your target monthly base rent. The calculator searches for the annual gross salary needed for its recommended affordability figure to reach that rent. It also displays the simpler income requirements under your chosen landlord screening ratio and the 30 percent gross-income rule.

Does the Colorado rent calculator include taxes?

Yes. The calculator estimates federal income tax, Social Security, Medicare, Additional Medicare, Colorado income tax, and the employee FAMLI charge using tax year 2025 settings coded into the tool. The estimate is used to calculate monthly take-home pay for the after-tax budget test.

What is the difference between the 3x rent rule and the 30 percent rule?

A 3x rent screen requires gross monthly income equal to three times monthly rent, or annual income equal to 36 times rent. The calculator's 30 percent rule is stricter. It allows rent equal to 30 percent of gross monthly income and requires annual income equal to 40 times rent.

Does the calculator include security deposits and pet costs?

Yes. It estimates security deposit, prepaid rent, pet deposit, pet rent, application fees, and moving costs. The code limits combined security deposit and prepaid rent to two months, caps the pet deposit at $300, and limits pet rent to the greater of $35 or 1.5 percent of monthly rent.

How does the calculator compare my rent with HUD Fair Market Rent?

The calculator stores FY 2025 Fair Market Rent values by Colorado county and bedroom size. Because its HUD comparison treats FMR as gross rent, it adds tenant-paid utilities to your base rent before comparing the result with the selected county and unit-size benchmark.

How accurate is the Colorado rent calculator?

The calculator is a planning estimate based on the formulas, tax settings, housing limits, and FY 2025 market data coded into the tool. Actual taxes, landlord approval standards, fees, lease terms, laws, and personal expenses can differ. The result is not legal, tax, financial, or rental-approval advice.

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