The 4% rule is a rule of thumb used to determine how much you need to save to retire. It suggests that if you withdraw 4% of your portfolio in the first year of retirement and adjust that amount for inflation thereafter, your money should last for at least 30 years.

What is my FI Number?

Your "FI Number" (Financial Independence Number) is the total amount you need invested to support your lifestyle indefinitely. It is typically calculated as your annual expenses multiplied by 25 (which corresponds to a 4% withdrawal rate).

How does savings rate affect retirement?

The savings rate is the most important factor in early retirement. A higher savings rate means you are living on less (so you need less to retire) AND saving more. For example, a 50% savings rate can theoretically lead to retirement in about 17 years starting from zero.

FIRE Calculator

Calculate when you can reach Financial Independence, Retire Early. Project your savings and net worth growth over time.

Your Details

Current Age

Current Savings ($)

Annual Income ($)

Annual Spending ($)

Assumptions

Return (%)

Withdrawal (%)

FI Number

$1,250,000

25x Annual Spending

Time to FI

19 Years

Age 49 in 2045

Savings Rate

37.5%

$30,000 per year

Net Worth Projection

Age 30: $50,000

Age 33: $157,699

Age 36: $289,635

Age 39: $451,263

Age 42: $649,263

Age 45: $891,822

Age 48: $1,188,968

Age 51: $1,552,983

Age 54: $1,998,918

Age 57: $2,545,208

Age 60: $3,214,436

Age 63: $4,034,270

Age 66: $5,038,601

Age 69: $6,268,950

Age 72: $7,776,180

Age 75: $9,622,602

Age 78: $11,884,548

Age 81: $14,655,529

Age 84: $18,050,101

Age 87: $22,208,597

Age 90: $27,302,933

Age 93: $33,543,714

Age 96: $41,188,939

Age 99: $50,554,668

FI: $1,250,000

Age 30Age 60

Milestones

Year	Age	Balance	Status
2026	30	$50,000	Building
2027	31	$83,500	Building
2028	32	$119,345	Building
2029	33	$157,699	Building
2030	34	$198,738	Building
2031	35	$242,650	Building
2032	36	$289,635	Building
2033	37	$339,910	Building
2034	38	$393,703	Building
2035	39	$451,263	Building
2036	40	$512,851	Building
2037	41	$578,751	Building
2038	42	$649,263	Building
2039	43	$724,712	Building
2040	44	$805,441	Building
2041	45	$891,822	Building
2042	46	$984,250	Building
2043	47	$1,083,147	Building
2044	48	$1,188,968	Building
2045	49	$1,302,195	FI Reached
2046	50	$1,423,349	FI Reached
2047	51	$1,552,983	FI Reached
2048	52	$1,691,692	FI Reached
2049	53	$1,840,111	FI Reached
2050	54	$1,998,918	FI Reached
2051	55	$2,168,843	FI Reached
2052	56	$2,350,662	FI Reached
2053	57	$2,545,208	FI Reached
2054	58	$2,753,373	FI Reached
2055	59	$2,976,109	FI Reached
2056	60	$3,214,436	FI Reached
2057	61	$3,469,447	FI Reached
2058	62	$3,742,308	FI Reached
2059	63	$4,034,270	FI Reached
2060	64	$4,346,669	FI Reached
2061	65	$4,680,935	FI Reached
2062	66	$5,038,601	FI Reached
2063	67	$5,421,303	FI Reached
2064	68	$5,830,794	FI Reached
2065	69	$6,268,950	FI Reached
2066	70	$6,737,776	FI Reached
2067	71	$7,239,421	FI Reached
2068	72	$7,776,180	FI Reached
2069	73	$8,350,513	FI Reached
2070	74	$8,965,049	FI Reached
2071	75	$9,622,602	FI Reached
2072	76	$10,326,184	FI Reached
2073	77	$11,079,017	FI Reached
2074	78	$11,884,548	FI Reached
2075	79	$12,746,466	FI Reached
2076	80	$13,668,719	FI Reached
2077	81	$14,655,529	FI Reached
2078	82	$15,711,417	FI Reached
2079	83	$16,841,216	FI Reached
2080	84	$18,050,101	FI Reached
2081	85	$19,343,608	FI Reached
2082	86	$20,727,660	FI Reached
2083	87	$22,208,597	FI Reached
2084	88	$23,793,198	FI Reached
2085	89	$25,488,722	FI Reached
2086	90	$27,302,933	FI Reached
2087	91	$29,244,138	FI Reached
2088	92	$31,321,228	FI Reached
2089	93	$33,543,714	FI Reached
2090	94	$35,921,774	FI Reached
2091	95	$38,466,298	FI Reached
2092	96	$41,188,939	FI Reached
2093	97	$44,102,164	FI Reached
2094	98	$47,219,316	FI Reached
2095	99	$50,554,668	FI Reached
2096	100	$54,123,495	FI Reached

Private & Secure

No Upload

Files stay on your device

Browser Processing

Everything runs locally

Zero Storage

These tools run entirely in your browser. Your sensitive data never leaves your device.

Why Use Our FIRE Calculator?

Find Your Number

Instantly calculate your 'FI Number'—the exact portfolio size needed to retire forever.

Savings Rate Power

Visualize how increasing your savings rate by even 5% drastically cuts working years.

Privacy First

No data collection. Your financial details are processed locally in your browser.

Visual Projection

See your net worth grow over time with our interactive 60-year projection chart.

Accurate Timeline

Get a realistic estimate of the age and year you can hand in your resignation.

Safe Withdrawal

Built on the researched 'Safe Withdrawal Rate' principles (The 4% Rule).

The Power of Savings Rate

Assuming you start from $0 net worth and earn a 5% inflation-adjusted investment return, here is how long it takes to reach Financial Independence based on how much of your take-home pay you save.

Savings Rate	Years to Retirement
10%	51 years
25%	32 years
40%	22 years
50%	17 years
65%	10.5 years
80%	5.5 years

*Based on the 'Shockingly Simple Math Behind Early Retirement' by Mr. Money Mustache. Assumes 4% withdrawal rate.

Understanding the Approach

FIRE (Financial Independence, Retire Early) is a movement dedicated to extreme savings and investment that allows proponents to retire far earlier than traditional budgets and retirement plans.

The Core Formula

Expenses vs. Income: It's not about how much you earn, but how much you keep.
The Multiple of 25: To be safe, you generally need 25 times your annual expenses invested.
Compounding: Time in the market does the heavy lifting.

Types of FIRE

Lean FIRE:Living on a strict budget (e.g., spending <$40k/year) to retire as quickly as possible.
Fat FIRE: Saving a significantly larger amount (e.g., $2.5M+) to support a lavish lifestyle in retirement.
Coast FIRE: Saving enough early so that compound interest will carry you to retirement without further contributions.

Frequently Asked Questions

What is a safe withdrawal rate?

The standard "safe" rate is 4%, based on the Trinity Study. This means in your first year of retirement, you withdraw 4% of your total portfolio value. However, some conservative planners prefer 3.5% or 3% to account for longer lifespans or lower expected market returns.

Does this account for inflation?

This simple calculator uses "real" dollars, meaning the return rate you enter should be adjusted for inflation. Typically, the stock market returns 10%, and inflation is 3%, so entering a 7% return gives you an inflation-adjusted projection.

Is Social Security included?

No, this calculator focuses strictly on your investment portfolio. Social Security benefits would be additional income that effectively lowers the "FI Number" you need to hit, providing an extra safety margin.

Is this investment advice?

No. This is a mathematical projection tool. Market returns vary, and past performance does not guarantee future results. Always consult a qualified financial advisor before making major life decisions.

Our Flagship Product

Need to Extract Data from Bank Statements?

Convert PDF bank statements to Excel/CSV with AI-powered accuracy. Works with any bank format, extracts transactions, balances, and account details automatically.

Bank Statement to Excel/CSV QuickBooks & Xero Export

More Free Tools

Rental ROI Calculator Amortization Calculator Financial Ratio Calculator Debt Snowball Calculator All Converters Business Tools