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FIRE Number for Boise, United States

United States

Affordable Mountain Living in the Heart of Idaho

7.2
FIRE Score Based on safety, healthcare, infrastructure & expat friendliness

Boise offers an unbeatable combination of outdoor recreation, low crime, and a cost of living well below most Western US cities. The Boise Foothills are your backyard, the Boise River Greenbelt runs through town, and world-class skiing is just two hours away. Idaho's flat income tax and affordable housing make every FIRE dollar stretch further.

Lean FIRE, FIRE, and Fat FIRE for Boise

The portfolio you need to retire in Boise at each lifestyle level, based on the 4% safe withdrawal rate.

Lifestyle FIRE Number Monthly Cost
Lean FIRE
$1.06M $3,550/mo
FIRE
$1.8M $6,000/mo
Fat FIRE
$4.5M $15,000/mo
Cost data: Q1 2026 · Medium confidence

Cost of Living Breakdown for Boise

Lean FIRE Lifestyle

$1.06M

A one-bedroom apartment in the Bench or Garden City, a paid-off car, and cooking at home most nights. Healthcare on an ACA Silver plan takes a meaningful share of the budget. Entertainment leans heavily on free public lands -- the Boise Foothills, the Greenbelt, and nearby BLM land are all accessible without spending much. This is a simple, outdoors-focused life with real budget constraints, but manageable if you do not need urban amenities.

FIRE Lifestyle

$1.8M

A three-bedroom home in Harris Ranch or the North End with Foothills views, regular dinners at Chandlers and Richard's, and a late-model SUV for mountain roads. You can afford premium health insurance, a golf membership, BSU season tickets, and multiple ski passes. Weekend fly-fishing trips and regular travel are within budget. This is a genuinely affluent life by Boise standards, with plenty of flexibility for outdoor pursuits and entertainment.

Fat FIRE Lifestyle

$4.5M

A large property in the Foothills or Eagle with mountain views, a cook who comes in several times a week, full-time domestic help, and top-tier concierge healthcare. You travel first class, keep multiple vehicles, and dine out without thinking about the cost. A second home in Sun Valley is feasible at this budget. Boise is a small enough city that this level of spending puts you among the most comfortable residents in the metro, with significant margin for charitable giving and travel.

Retirement Confidence

Enter your portfolio on the homepage to see Monte Carlo retirement confidence for Boise.

Important notes on retirement confidence

A 90% confidence level is widely considered a strong retirement plan โ€” it means your portfolio survived in 9 out of 10 historically-modeled scenarios. A 95% or higher rate is extremely conservative. Reaching 100% is nearly impossible in any Monte Carlo model, because there will always be a few extreme worst-case market sequences that deplete any portfolio.

Early retirees may need portfolios to last 40-50+ years. The 4% rule was originally validated for 30-year retirements. Consider a more conservative withdrawal rate (3-3.5%) for very early retirement.

Healthcare, Visa & City Overview

climate Mild
healthcare Good
english Widely spoken
safety Safe
visa Easy
Timezone

MST (UTC-7)

Currency

USD

Language

English

Avg. Temperature

52ยฐF / 11ยฐC

Internet

150+ Mbps average

Airport

Boise Airport (BOI)

Frequently Asked Questions About Retiring in Boise

What is the FIRE Number for Boise, United States?

The FIRE Number for Boise ranges from $1.06M (Lean FIRE lifestyle) to $4.5M (Fat FIRE lifestyle). A FIRE retirement requires a portfolio of approximately $1.8M, based on estimated monthly costs of $6,000 and a 4% safe withdrawal rate.

How much does it cost to retire in Boise?

Monthly living costs in Boise range from $3,550 (Lean FIRE) to $6,000 (FIRE), covering housing, dining, groceries, healthcare, transportation, entertainment, and utilities.

What is healthcare like in Boise for retirees?

Healthcare in Boise costs approximately $625 to $700/month depending on coverage level. ACA marketplace Silver plan through Your Health Idaho exchange.

What is the weather like in Boise?

Semi-arid with four distinct seasons; snowy winters and warm, dry summers The average temperature is 52ยฐF / 11ยฐC.

How safe is Boise for retirees?

High โ€“ consistently ranked among safest US cities

How Boise Compares

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