How do you calculate a Barista FIRE number?

Subtract expected annual work income from annual spending, then divide the remaining gap by your withdrawal rate. At 4%, that is gap expenses × 25. Every durable $10k of work income reduces the 4% target by about $250k.

Is Barista FIRE the same as Coast FIRE?

No. Coast FIRE is about having enough invested that growth alone may hit full FIRE later without new contributions. Barista FIRE uses ongoing work income to reduce how large the portfolio must be now.

What should I watch out for with semi-retirement?

Income volatility, healthcare and benefits cliffs, taxes on side work, and lifestyle inflation. Stress-test lower income and higher spending than your base case. See the healthcare cliffs educational guide.

Should healthcare premiums go in spending or income?

Usually put realistic premiums and out-of-pocket costs in annual spending, and put cash wages in work income. That keeps the gap honest when benefits change.

Can Barista FIRE be more expensive than full FIRE?

The portfolio target is usually smaller, but total life cost can rise if coverage becomes expensive or work income is unreliable. Compare full FIRE, Coast, and Barista under the same assumptions before cutting hours.

Barista FIRE Calculator

Semi-retirement math: set expected work income and see the smaller portfolio needed to cover the remaining spending gap at your withdrawal rate.

Results below are educational illustrations under stated assumptions — not forecasts.

Methodology Disclaimer

Shared assumptions

One set of inputs powers every calculator. Changes sync to the URL for easy sharing. Export CSV for your notes (educational only).

Annual spending

Target lifestyle spend in today's dollars

Current portfolio

Annual contributions

Withdrawal rate4.0%

Expected real return5.0%

After inflation (today's dollars)

Return mode

Switch to Nominal to enter pre-inflation returns and set an inflation assumption.

FIRE Number Calculator

Portfolio size needed so a safe withdrawal covers annual spending. Presets are starting points — edit freely.

Core

Annual spending (today’s dollars)

Include housing, food, healthcare, travel, taxes, and fun.

Your FIRE number

$1,500,000

Portfolio multiple

25.0×

Monthly spend

$5,000

Sensitivity — withdrawal rate

Same spending ($60,000). Tap to apply to shared assumptions.

Formula: FIRE = annual spending ÷ withdrawal rate. At 4.0%, you need roughly 25.0× annual spending. Educational estimate — not advice. Methodology.

Years to FIRE

How long until your portfolio reaches your FIRE number, given savings and a constant real return.

Projection

Years to FIRE

21.1

At 5.0% real return.

Target portfolio

$1,500,000

Approx. savings rate

33.3%

Savings ÷ (savings + spend)

Portfolio path (illustrative)

Start $150,000End $1,593,946

Sensitivity — real return

Target $1,500,000. Tap a return to apply (real mode).

End-of-year contributions and constant return. Markets are volatile; fees and taxes are not modeled. Use the stress test below for an educational sequence-of-returns range. Educational only.

The main calculators assume a smooth return every year. Markets bounce. This stress test runs 1,000 random paths with the same average real return and a fixed volatility, then shows how often terminal wealth meets FIRE number under a simple definition.

Volatility (illustrative)

Free1,000 paths · success rate · p10/p50/p90 · stays freeComing Pro5,000+ paths, regimes, historical engines (planned)See Pro

Success rate

44%

441 / 1,000 paths ≥ target

p10 terminal

$758,296

Lower tail (illustrative)

Median terminal

$1,411,814

p50 of simulated endings

p90 terminal

$2,626,669

Upper tail (illustrative)

Sample paths (worst / median / best by terminal)

Terminal wealth distribution

Model: independent annual shocks r = 5.0% ± σ·Z (Z standard normal), end-of-year contributions, seed 42 for reproducibility. Mean return 5.0%, σ 15.0%, horizon 22 years, 1,000 paths. Not historical backtesting, not tax-aware, not advice. Details: Methodology · Approach.

Historical retirement scenarios

Data gate

Historical scenarios are unavailable until the source data is independently verified.

Production historical results remain disabled until the submitted series can be independently reproduced from a documented source, transformation method, coverage, and checksum.

Historical scenarios are not future probabilities. See the methodology for the data and calculation limits.

Barista FIRE Calculator

Semi-retirement math: part-time or side income covers some spending, so your portfolio only needs to fund the gap. Named after the classic “coffee shop job for benefits” idea — any flexible work applies.

Semi-FI

Expected part-time / side income (annual)

After-tax cash flow you expect from work in semi-retirement.

Barista number

$875,000

Spending gap (portfolio-funded)

$35,000

vs full FIRE

−$625,000

Years to Barista

13.9

Status: about 13.9 years to the barista number. Work income covers about 41.7% of spending. Portfolio withdrawals need to cover $35,000/year at 4.0% → a nest egg of $875,000 (vs $1,500,000 for full FIRE).

Sensitivity — work income

Same spending ($60,000) at 4.0%. Tap to set part-time income.

Sensitivity — withdrawal rate

Formula: barista = max(0, expenses − work income) ÷ withdrawal rate. Healthcare, taxes, housing, and job reliability are not modeled — see ways a plan can miss. Educational only. Compare with Coast if your question is stopping contributions, not partial work income. Methodology.

Loading calculators…

Ways a plan can miss

The numbers above are illustrations under stated assumptions. These six gaps are common reasons a tidy multiple does not hold up in life. Read the methodology and disclaimer.

HealthcareWatch item
Premiums, deductibles, and the years before Medicare are outside the simple FIRE multiple.
Healthcare before Medicare
HousingWatch item
Rent, insurance, maintenance, and location can move spending more than the withdrawal-rate nickname.
Budget and lifestyle notes
Sequence of returnsWatch item
The same long-run average can fail if poor markets arrive early in withdrawals.
Sequence-risk guide
TaxesWatch item
These tools illustrate pre-tax planning math. Account types and later withdrawals can raise the cash you need.
IRS Publication 590-A
LongevityWatch item
A longer retirement needs more years of spending than a 30-year historical rule of thumb.
SSA delayed retirement
LifestyleWatch item
Travel, family support, and spending creep change the target. Revisit the number when life changes.
Lean / Regular / Fat examples

How this barista fire calculator works

Barista FIRE (semi-retirement) blends portfolio withdrawals with intentional work income. The portfolio only needs to cover the spending gap after part-time or flexible earnings.

Lower gap expenses mean a smaller “barista number,” which can unlock partial freedom years earlier than full FIRE — if the work income is realistic and sustainable.

People choose this path for structure, community, health benefits, or as a bridge before Social Security or Medicare eligibility.

Formula

Gap expenses = max(0, Annual spending − Work income)
Barista number = Gap expenses ÷ Withdrawal rate

Example: ($60,000 − $20,000) ÷ 0.04 = $1,000,000

Example: $60k spend, $20k part-time income, 4% SWR

If annual spending is $60,000 and part-time work covers $20,000, the portfolio must fund $40,000 per year.

At 4%, barista number = $40,000 ÷ 0.04 = $1,000,000 — $500,000 less than a $1.5M full FIRE number at the same spending level.

When to use it

You are open to part-time or flexible work in “retirement.”
You want to see how much side income shrinks the nest egg required.
You are bridging to benefits eligibility or testing semi-retirement lifestyle fit.

Limitations

Job reliability, benefit cliffs, and self-employment taxes are not modeled.
Spending often rises with free time; keep a buffer.
Educational illustration only — not a paycheck-replacement plan.

Related guides & tools

FAQ

How do you calculate a Barista FIRE number?: Subtract expected annual work income from annual spending, then divide the remaining gap by your withdrawal rate. At 4%, that is gap expenses × 25. Every durable $10k of work income reduces the 4% target by about $250k.
Is Barista FIRE the same as Coast FIRE?: No. Coast FIRE is about having enough invested that growth alone may hit full FIRE later without new contributions. Barista FIRE uses ongoing work income to reduce how large the portfolio must be now.
What should I watch out for with semi-retirement?: Income volatility, healthcare and benefits cliffs, taxes on side work, and lifestyle inflation. Stress-test lower income and higher spending than your base case. See the healthcare cliffs educational guide.
Should healthcare premiums go in spending or income?: Usually put realistic premiums and out-of-pocket costs in annual spending, and put cash wages in work income. That keeps the gap honest when benefits change.
Can Barista FIRE be more expensive than full FIRE?: The portfolio target is usually smaller, but total life cost can rise if coverage becomes expensive or work income is unreliable. Compare full FIRE, Coast, and Barista under the same assumptions before cutting hours.

Educational illustration only — not financial, investment, tax, or legal advice. Full disclaimer.

Methodology · Disclaimer · FAQ