What is the FIRE number and how is it calculated?

Your FIRE number is the investment portfolio size needed to sustain your annual expenses indefinitely. It is calculated by multiplying your annual expenses by 25 (based on the 4% safe withdrawal rate). For example, if you spend $50,000 per year, your FIRE number is $1,250,000.

What is the 4% rule for retirement?

The 4% rule states that you can withdraw 4% of your portfolio in the first year of retirement and adjust for inflation each year, with a high probability of your money lasting 30+ years. It is based on the Trinity Study using historical US stock and bond returns. Some financial planners now recommend 3.5% for extra safety.

How much do I need to save each month to retire early?

The amount depends on your current age, target retirement age, current savings, expected investment returns, and annual expenses in retirement. Our FIRE calculator computes your exact monthly savings requirement. Generally, FIRE adherents save 50-70% of their income to retire in 10-15 years.

What is the FIRE number in Colorado?

Based on Colorado's median household income of $82,200, the FIRE number at a 4% withdrawal rate is $2,055,000 (25x annual income). Adjusted for Colorado's cost of living index of 105, the real purchasing power equivalent is $1,957,143.

How long does it take to achieve FIRE in Colorado?

At a 40% savings rate on Colorado median income, it takes approximately 24 years to reach a FIRE number of $2,055,000 (7% annual growth assumption). At 50%, that drops to about 22 years.

Is Colorado a good state for early retirement?

Colorado has a cost of living index of 105 (100 = national average). At 105, it is above the national average — a higher FIRE number is needed compared to lower-cost states. Colorado has a state income tax of 4.4% flat.

Not Financial Advice. CalcMoney provides calculators for educational and planning purposes only. Results are estimates and do not constitute financial, tax, or investment advice. Consult a qualified professional before making financial decisions. Terms apply.

CALCMONEY // FIRE // CO

Colorado FIRE Calculator 2026

FIRE number in Colorado: $2,055,000 (25x median income). Cost of living index: 105/100. State income tax: 4.4% flat.

Calculate Your FIRE Date

FIRE Number (4% rule)

$2,055,000

Cost of Living Index

105/100

Median Income

$82,200

State Tax

4.4% flat

Years to FIRE in Colorado at Different Savings Rates

FIRE NUMBER: $2,055,000 — 7% ANNUAL RETURN — $82,200 MEDIAN INCOME

Savings Rate	Annual Savings	Annual Spend	Years to FIRE
20%	$16,440	$65,760	32 yrs
30%	$24,660	$57,540	27 yrs
40%	$32,880	$49,320	24 yrs
50%	$41,100	$41,100	22 yrs
60%	$49,320	$32,880	20 yrs
70%	$57,540	$24,660	18 yrs

FIRE in Colorado: Cost of Living Reality

CO FIRE CONTEXT

Colorado has a cost of living index of 105 relative to the US average of 100. This is close to the national average. Colorado offers a typical cost structure — housing and expenses track closely to US median.

The 4% safe withdrawal rule suggests a FIRE number of 25x annual expenses. At Colorado's median income of $82,200, that is $2,055,000. However, if you plan to spend more (or less) than median income in retirement, scale the number accordingly.

Colorado taxes income at 4.4% flat. In FIRE, your primary income comes from portfolio withdrawals, dividends, and capital gains. Long-term capital gains in CO are taxed at the same rate as ordinary income, including IRA withdrawals. Factor this into your withdrawal rate planning.

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