What is Chubby FIRE?
is independence at roughly 150% of your current spending, commonly $60,000–$120,000 a year for a household. It sits between regular FIRE (“I can fund my current life forever”) and Fat FIRE (“money is no object”).
It is the tier for people who want a real cushion without a fortress: travel that is not optimized within an inch of its life, healthcare chosen on merit rather than price, hobbies with actual budgets, and enough slack that a surprise expense is an annoyance instead of a crisis.
The tier exists because binary thinking fails retirement planning. A budget built for survival feels fragile; one built for luxury demands a decade more work than most people want to trade. Chubby pays ~50% over today's lifestyle and buys back peace of mind.
The formula — a cushion you can turn
Same division as every FIRE variant; the multiplier is the chubby part:
Chubby FIRE number = (monthly spending × 12 × cushion multiplier) ÷ SWR
The default multiplier is ×1.5, adjustable from ×1.2 (a modest buffer) to ×2.0 (one foot in fat territory). A $4,500/month lifestyle at ×1.5 prices retirement spending at $6,750/month, or $81,000/year. That needs $2,025,000 at a 4% withdrawal rate. At ×1.2 the target drops to $1.62M; at ×2 it climbs to $2.7M.
Two honesty rules run underneath, same as everywhere on FireVerdict:
- Real returns. Converted as (1 + nominal) ÷ (1 + inflation) − 1. Naive subtraction overstates typical long-run portfolios.
- Taxes. An optional gross-up makes the target cover pre-tax withdrawals, not just take-home spending.
A worked example
Alex and Jordan are 35, spend $4,500 a month ($54,000/year), have $450,000 invested, and save $2,500/month toward freedom at 58. Their chubby target uses the ×1.5 cushion.
- Retirement spending: $4,500 × 12 × 1.5 = $81,000/year, so the FIRE number is $2,025,000.
- At ~3.9% real return their portfolio reaches roughly $2.18M by 58. The chubby number is fully funded around age 57, a year ahead of schedule.
- The plain-FIRE figure of $1.35M was already crossed back around age 50, so the ×1.5 cushion costs about seven extra working years. Neither answer is wrong; the point is seeing the trade before choosing.
Reading your verdict
- ✓ Coasting: investments already exceed your chubby number. Compounding closes it even if you never save again.
- On track: current savings land on time, and the subline names when you could stop.
- Behind: the panel prices the fix, either extra monthly contributions or a later date, whichever feels cheaper.
Then flip the crash test. Replaying with investments down 30% shows whether the cushion survives being needed early, which is precisely when cushions matter.
Frequently asked questions
What counts as Chubby FIRE?
Chubby FIRE is the middle tier of the lifestyle spectrum: financial independence at roughly 150% of your current spending, typically $60,000–$120,000 a year for a household. It's regular FIRE plus a deliberate cushion for nicer travel, fewer budget constraints, real healthcare coverage and slack for surprises, without the private-planes ambition of Fat FIRE.
How much money do I need for Chubby FIRE?
At a 4% withdrawal rate, $90,000 of annual retirement spending needs $2.25 million; $120,000 needs $3 million. The engine here models retirement spending as 1.5× your current spending (adjustable 1.2×–2×), so a $5,000/month lifestyle prices chubby retirement at $7,500/month and a $2.25M target.
Why would retirement cost more than working life?
Because the extra spending buys back what work was subsidizing or forbidding: travel in peak season instead of shoulder season, healthcare you choose rather than accept from an employer, hobbies that finally get real budgets, and help for aging parents or adult kids. Retirees also gain forty free hours a week, and time is the one commodity money converts into spending almost automatically.
How is Chubby FIRE different from just using a bigger safety margin?
They overlap but aren't identical. A safety margin keeps spending fixed and raises the portfolio (a lower withdrawal rate, say 3.5%). Chubby FIRE keeps the withdrawal rate and explicitly raises planned spending. Many chubby retirees do both: target 1.5× spending at a slightly conservative rate, which this calculator approximates by lowering the SWR in advanced settings.
Is aiming for Chubby FIRE worth the extra years of work?
That's the entire trade, and it's now visible in numbers instead of vibes. Each step up the multiplier adds portfolio and usually years, and the verdict panel shows both what you have and when each version lands. Many people discover that going from 1.2× to 1.5× costs two years while 1.5× to 2× costs five. That knowledge makes the decision yours instead of default.
Compare the tiers
Chubby is the middle of the spectrum. Here is the same Alex and Jordan, at $4,500 a month, priced at each tier.
- Lean FIRE ×0.7$945,000
- Regular FIRE ×1$1,350,000
- Chubby FIRE ×1.5this page$2,025,000
- Fat FIRE ×2.5$3,375,000
Every calculator is on the FireVerdict hub.