Freelancer Emergency Fund Calculator

Emergency fund by math, not vibes — built for freelancers.

Heuristic simulation. Not financial or tax advice.
Multi‑select with Ctrl/Cmd or Shift. List auto‑updates after each run.

Inputs

Profile
Active Pipeline
Income (Triangular)
Expenses
Job Loss
Risk Target
Freelancer
Seasonality
Client Concentration Risk
Client Health
Sensitivity & Live

Adjust sliders to explore what-if effects. Live mode uses fewer simulations for speed.

Auto-saved
Model Details

We approximate monthly net cash as Normal(μ, σ²) for a closed-form buffer estimate, then refine via Monte Carlo with your custom distributions (income, expenses, spikes, job loss). All computations run locally; no data leaves your browser.

Glossary / Parameters

  • R*: Minimum starting buffer keeping ruin probability ≤ ε over the horizon.
  • Income Triangular (min/mode/max): Assumed shape for monthly gross receipts.
  • Fixed Expenses: Predictable mandatory outgoing cash each month.
  • Variable Mean & ±%: Average flexible spend plus symmetric variability band.
  • Spike Probability / Amount: Low‑frequency large expense event model.
  • Monthly Hazard (Job Loss): Independent chance of income dropping to zero that month; triggers downtime.
  • Downtime Min/Max: Range of months with zero income if hazard triggers.
  • Horizon: Months you want to survive without going negative.
  • Max Ruin Probability (ε): Acceptable chance of ever hitting a negative balance within horizon.
  • Closed‑Form R*: Fast analytical approximation ignoring discrete spike/job loss structure.
  • Monte Carlo R*: Simulation-based estimate honoring your full distribution assumptions.
  • P5 Path: 5th percentile balance path—stress trajectory.
  • Pipeline: Signed work value released stochastically after collection delay at expected conversion %.
  • Smoothing Reserve: Skim of above-baseline income used to top up below-baseline months.
  • Payment Delay: Portion of income probabilistically deferred 1 month (receivables bucket).
  • R* Confidence Interval: Bootstrap percentile band across repeated R* searches (80/90/95%).
  • Risk Attribution: ΔR* (or Δ ruin probability) removing each risk source, normalized.
Itemized Incomes & Expenses (optional)
Add your clients/services and expense categories. Click Apply to populate the main inputs (income min/mode/max, fixed, variable).

Income Items

Expense Items

Fills the income & expense inputs automatically.

Results

Required Buffer R* i

Monthly Cash Flow Breakdown

Income allocation: fixed, variable, expected spike reserve, planned saving, residual or shortfall. Spike slice uses expected value (p * amount). Job loss not included in averages here.

Risk Contributors

Shares based on how much each risk source raises R* versus a counterfactual with that source removed (normalized deltas).

Net Equation Map i

Risk Drivers (Tornado)

Closed-Form R*i
Monte Carlo R*i
Ruin Prob (Current Buffer)i
Visualizes how ruin probability decays as starting buffer increases (helps judge diminishing returns beyond R*).
Histogram of the first month balance goes negative starting from your current buffer. “Never” bucket shows sims that stayed solvent through the horizon.
Computation Timings
Phasems%
Total
Worker + simulation phases; live mode uses fewer sims.
Privacy & Local Analytics

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