Chubby FIRE Calculator

What is Chubby FIRE?

Chubby FIRE is a variation of the FIRE (Financial Independence, Retire Early) movement that targets a comfortable, above-average lifestyle in retirement without reaching the luxury levels of Fat FIRE. The term describes a financial independence target that sits between Regular FIRE and Fat FIRE—not bare-bones frugal, but not extravagant either.

Chubby FIRE typically means retiring with annual spending between $75,000 and $100,000, requiring a nest egg of roughly $1.875 million to $2.5 million using the standard 4% withdrawal rate. This level of spending allows for comfortable living, some travel, dining out regularly, and maintaining hobbies without constantly watching every dollar.

The appeal of Chubby FIRE is balance. You don't need to sacrifice your lifestyle during your working years or extend your career significantly to reach Fat FIRE levels. At the same time, you're not cutting corners or living with the tight constraints of Lean FIRE.

The Chubby FIRE formula

Chubby FIRE uses the same fundamental calculation as all FIRE variations, based on the sustainable withdrawal rate:

$$\text{Chubby FIRE Number} = \frac{\text{Annual Expenses}}{\text{Withdrawal Rate}}$$

With a 4% withdrawal rate, this simplifies to:

$$\text{Chubby FIRE Number} = \text{Annual Expenses} \times 25$$

For Chubby FIRE's typical spending range of $75,000–$100,000 annually, this translates to:

Annual expenses	Chubby FIRE number (4% rule)
$75,000	$1,875,000
$80,000	$2,000,000
$85,000	$2,125,000
$90,000	$2,250,000
$95,000	$2,375,000
$100,000	$2,500,000

FIRE types compared

The FIRE community has developed several categories based on target spending levels:

FIRE type	Annual spending	Typical target	Lifestyle description
Lean FIRE	$25,000–$40,000	$625K–$1M	Minimalist, highly budget-conscious
Regular FIRE	$40,000–$75,000	$1M–$1.875M	Comfortable middle-class retirement
Chubby FIRE	$75,000–$100,000	$1.875M–$2.5M	Above-average comfort with flexibility
Fat FIRE	$100,000–$200,000	$2.5M–$5M	Premium lifestyle without financial concerns
Obese FIRE	$200,000+	$5M+	Ultra-wealthy early retirement

Where Chubby FIRE fits

Chubby FIRE occupies the sweet spot for many aspiring early retirees. It requires serious savings discipline but remains achievable for dual-income professional households, successful single earners, or those with disciplined spending habits and decent incomes.

Unlike Lean FIRE, Chubby FIRE doesn't require geographic arbitrage (moving to low cost-of-living areas) or extreme frugality. Unlike Fat FIRE, it doesn't demand exceptionally high incomes or extended careers.

Who pursues Chubby FIRE?

Chubby FIRE appeals to a specific demographic of savers:

Professionals with solid but not exceptional incomes: Software developers, accountants, teachers with working spouses, nurses, and mid-level managers earning $100,000–$200,000 household income can realistically target Chubby FIRE while maintaining a comfortable present-day lifestyle.

Value-conscious spenders: People who prioritize experiences and quality over status symbols. They'll fly economy but take three vacations a year. They drive reliable cars but not luxury brands.

Those in moderate cost-of-living areas: Chubby FIRE spending works well in suburban areas and mid-tier cities where $85,000 goes further than in Manhattan or San Francisco.

Couples without children or with grown children: Without childcare and education expenses, more income flows toward retirement savings.

People who don't want to work forever but enjoy their careers: They're not desperate to escape work immediately but want the option to stop in their late 40s or early 50s.

Building a Chubby FIRE budget

What does $85,000 in annual spending look like? Here's a sample breakdown for a retired couple:

Housing ($24,000–$30,000/year)

• Paid-off home with property taxes of $6,000–$10,000
• Home insurance: $1,500–$2,500
• Maintenance and repairs: $6,000–$8,000
• Utilities: $4,000–$6,000
• Or: Rent in a moderate cost area: $2,000–$2,500/month

Healthcare ($12,000–$18,000/year)

• ACA marketplace insurance: $8,000–$14,000 (varies significantly by state and subsidy eligibility)
• Out-of-pocket costs, dental, vision: $2,000–$4,000
• Prescriptions and copays: $1,000–$2,000

Transportation ($6,000–$10,000/year)

• Two reliable used cars (depreciation/replacement fund): $3,000–$5,000
• Insurance: $1,500–$2,500
• Gas, maintenance, registration: $2,000–$3,000

Food and dining ($10,000–$14,000/year)

• Groceries: $6,000–$8,000
• Dining out (2–3 meals per week): $4,000–$6,000

Travel ($8,000–$12,000/year)

• 2–3 domestic trips or 1 international trip per year
• Mix of hotels and vacation rentals
• Comfortable but not luxury accommodations

Entertainment and lifestyle ($4,000–$6,000/year)

• Streaming services, subscriptions: $1,000–$1,500
• Hobbies: $1,500–$2,500
• Events, activities, personal care: $1,500–$2,000

Miscellaneous ($5,000–$8,000/year)

• Gifts, charitable giving: $2,000–$3,000
• Clothing, household items: $1,500–$2,500
• Buffer for unexpected expenses: $2,000–$3,000

Calculating years to Chubby FIRE

The time required depends on your current savings, annual contributions, and expected returns.

The compound growth formula

$$\begin{aligned} FV &= PV(1 + r)^n \\ &\quad + PMT \times \frac{(1 + r)^n - 1}{r} \end{aligned}$$

Where:

• $FV$ = Future value (your Chubby FIRE number)
• $PV$ = Present value (current portfolio)
• $r$ = Real return rate (nominal return minus inflation)
• $n$ = Number of years
• $PMT$ = Annual contribution

Example scenarios

Starting from scratch at 30:

• Current savings: $50,000
• Annual contribution: $40,000
• Target: $2,125,000
• Real return: 5%
• Time to Chubby FIRE: approximately 22 years (age 52)

Mid-career professional at 40:

• Current savings: $400,000
• Annual contribution: $60,000
• Target: $2,125,000
• Real return: 5%
• Time to Chubby FIRE: approximately 14 years (age 54)

High saver at 35:

• Current savings: $300,000
• Annual contribution: $80,000
• Target: $2,125,000
• Real return: 5%
• Time to Chubby FIRE: approximately 13 years (age 48)

The 4% rule and Chubby FIRE

The 4% rule, derived from the Trinity Study (1998), suggests that withdrawing 4% of your portfolio in year one and adjusting for inflation each subsequent year has historically provided a high probability of not running out of money over 30 years.

Should Chubby FIRE use 4%?

The 4% rule remains appropriate for most Chubby FIRE practitioners, especially those retiring in their 50s with a 30–40 year retirement horizon. However, those retiring very early (40s or younger) may want a more conservative rate:

Withdrawal rate	Multiplier	Best for
4.0%	25×	Traditional 30-year retirement
3.5%	28.6×	35–40 year retirement
3.25%	30.8×	Early retirees (mid-40s)
3.0%	33.3×	Very early retirement (early 40s)

A 3.5% withdrawal rate with $85,000 annual spending requires $2,428,571—still within reach but providing extra security for a longer retirement.

Investment strategies for Chubby FIRE

Asset allocation during accumulation

While building toward Chubby FIRE:

Asset class	Allocation	Purpose
US stock index funds	50–60%	Long-term growth
International stocks	20–25%	Geographic diversification
Bonds	15–25%	Stability as you near FIRE
REITs (optional)	0–10%	Real estate exposure

Asset allocation in retirement

Once you reach Chubby FIRE, many practitioners shift to a more conservative allocation:

Asset class	Allocation	Purpose
Stocks (total market)	50–60%	Growth to outpace inflation
Bonds	30–40%	Income and stability
Cash/short-term	5–10%	Near-term expenses

Tax-efficient account usage

Maximize contributions to tax-advantaged accounts in this order:

1. 401(k) up to employer match: Free money
2. HSA if eligible: Triple tax advantage
3. 401(k) to maximum: $23,000 in 2024 ($30,500 if 50+)
4. Backdoor Roth IRA: $7,000 in 2024
5. Taxable brokerage: After maxing tax-advantaged space

Coast FIRE and Chubby FIRE

Coast FIRE represents the point where your current savings, left untouched, will grow to your target by a specified age.

Coast FIRE formula

$$\text{Coast Number} = \frac{\text{Chubby FIRE Number}}{(1 + r)^{n}}$$

Example

Target: $2,125,000 by age 55 Current age: 35 Years remaining: 20 Expected real return: 6%

$$\text{Coast Number} = \frac{\$2{,}125{,}000}{(1.06)^{20}} = \$662{,}500$$

Once you have $662,500 invested, you could stop contributing and still reach $2.125M by 55. This milestone provides options: take a lower-paying but more fulfilling job, work part-time, or take extended breaks.

Chubby FIRE vs other FIRE levels

Chubby FIRE vs Lean FIRE

Factor	Lean FIRE	Chubby FIRE
Annual spending	$30,000–$40,000	$75,000–$100,000
Portfolio needed	$750K–$1M	$1.875M–$2.5M
Time to achieve	Faster	Longer
Location flexibility	May need LCOL area	Most areas work
Lifestyle restrictions	Significant	Moderate
Healthcare margin	Tight	Comfortable
Travel budget	Limited	Regular

Chubby FIRE vs Fat FIRE

Factor	Chubby FIRE	Fat FIRE
Annual spending	$75,000–$100,000	$150,000–$200,000
Portfolio needed	$1.875M–$2.5M	$3.75M–$5M
Income required	Upper-middle class	High earners
Working years	15–25 years	20–30+ years
Luxury spending	Occasional	Regular
International travel	Economy class	Business class
Second home	Unlikely	Possible

Common Chubby FIRE challenges

Healthcare costs

Healthcare is the biggest wildcard for early retirees in the US. Before Medicare eligibility at 65, you're responsible for your own coverage. ACA marketplace premiums vary widely by state and can consume 15–20% of a Chubby FIRE budget.

Mitigation strategies:

• Keep taxable income low to qualify for ACA subsidies
• Consider states with better ACA marketplace options
• Budget generously for healthcare increases
• Build an HSA balance for out-of-pocket costs

Sequence of returns risk

Poor market returns in your first few retirement years can devastate a portfolio. If markets drop 30% in year one, you're withdrawing a larger percentage of a smaller portfolio.

Mitigation strategies:

• Build a cash buffer of 1–2 years' expenses
• Use a flexible withdrawal strategy
• Consider part-time work during market downturns
• Maintain 2–3 years of expenses in bonds/cash

Lifestyle creep risk

As investments grow toward the Chubby FIRE target, it's tempting to increase spending, pushing the goalpost further away.

Mitigation strategies:

• Automate investments before money hits checking accounts
• Track spending monthly, not just annually
• Define your "enough" number and resist moving it
• Focus on the freedom FIRE provides, not maximizing lifestyle

Withdrawal strategies for Chubby FIRE

Fixed percentage method

Withdraw a set percentage (4% or 3.5%) of your initial portfolio, adjusted annually for inflation.

Pros: Predictable income, simple to implement Cons: Doesn't adjust for market conditions

Variable percentage withdrawal

Withdraw a percentage of the current portfolio value each year (e.g., 4% of whatever the portfolio is worth).

Pros: Automatically adjusts to market conditions Cons: Income fluctuates year to year

Guardrails approach

Set spending floors and ceilings. If your withdrawal rate exceeds 5%, cut spending. If it drops below 3.5%, allow increased spending.

Example:

• Target: 4% withdrawal ($85,000 from $2.125M)
• Ceiling: If portfolio drops below $1.7M, reduce to $75,000
• Floor: If portfolio exceeds $2.8M, allow $95,000

Bucket strategy

Divide assets into time-based buckets:

1. Cash bucket (1–2 years): $85,000–$170,000 in high-yield savings
2. Bond bucket (3–7 years): $255,000–$425,000 in bonds
3. Stock bucket (8+ years): Remainder in equities

Replenish cash from bonds during good years, let stocks grow during downturns.

Is Chubby FIRE right for you?

Choose Chubby FIRE if:

• You want comfort without extravagance
• Your household income is $100,000–$200,000
• You're willing to save 30–50% of income for 15–25 years
• You enjoy your career enough to work another decade-plus
• You want flexibility without extreme frugality
• You live in a moderate cost-of-living area

Consider other options if:

• You need to retire as fast as possible (Lean FIRE)
• You can't imagine living on less than $150,000/year (Fat FIRE)
• Your income doesn't support high savings rates (Regular FIRE)
• You want to leave a large inheritance (Fat FIRE or Obese FIRE)

Getting started with Chubby FIRE

1. Calculate your number: Determine realistic annual expenses and multiply by 25 (or 28–30 for more conservative planning)
2. Track current spending: Understand where your money goes before projecting retirement needs
3. Maximize savings rate: Target 30–50% of gross income
4. Use tax-advantaged accounts: Max out 401(k), IRA, and HSA before taxable investing
5. Invest consistently: Low-cost index funds, automatic contributions, ignore market noise
6. Monitor progress quarterly: Track net worth and adjust contributions as needed
7. Plan your withdrawal strategy: Decide on 4% vs 3.5%, fixed vs variable, and bucket allocation before retiring