{
  "slug": "emergency-fund",
  "title": "Emergency Fund Calculator",
  "heading": "Emergency Fund Calculator",
  "category": "financial",
  "url": "https://www.revenuelab.fyi/toolbox/emergency-fund",
  "summary": "Your target cash buffer and how long it takes to build it.",
  "description": "Three to six months of essential expenses is the standard target; variable-income earners and single-income households should aim higher. This sizes the target and tells you the monthly savings needed to hit it.",
  "formula": "Target = Essential monthly expenses × Months of coverage.",
  "dateModified": "2026-09-30",
  "run_url": "https://www.revenuelab.fyi/api/public/calc?tool=emergency-fund",
  "inputs": [
    {
      "id": "expenses",
      "label": "Essential monthly expenses",
      "kind": "number",
      "hint": null,
      "default": 3800,
      "unit": "$",
      "min": 0,
      "max": null
    },
    {
      "id": "months",
      "label": "Months of coverage",
      "kind": "number",
      "hint": null,
      "default": 6,
      "unit": null,
      "min": 1,
      "max": 24
    },
    {
      "id": "saved",
      "label": "Already saved",
      "kind": "number",
      "hint": null,
      "default": 5000,
      "unit": "$",
      "min": 0,
      "max": null
    },
    {
      "id": "monthly",
      "label": "Monthly contribution",
      "kind": "number",
      "hint": null,
      "default": 600,
      "unit": "$",
      "min": 0,
      "max": null
    }
  ],
  "outputs": [
    {
      "id": "target",
      "label": "Emergency fund target",
      "format": "currency",
      "hint": null,
      "primary": true
    },
    {
      "id": "gap",
      "label": "Still needed",
      "format": "currency",
      "hint": null,
      "primary": false
    },
    {
      "id": "pct",
      "label": "Progress",
      "format": "percent",
      "hint": null,
      "primary": false
    },
    {
      "id": "monthsToGoal",
      "label": "Months to fully funded",
      "format": "duration",
      "hint": null,
      "primary": false
    }
  ],
  "worked_example": {
    "inputs": [
      "Essential monthly expenses: 3800 $",
      "Months of coverage: 6",
      "Already saved: 5000 $",
      "Monthly contribution: 600 $"
    ],
    "outputs": [
      "Emergency fund target: $22,800.00",
      "Still needed: $17,800.00",
      "Progress: 21.9%",
      "Months to fully funded: 30"
    ]
  },
  "how_to": {
    "title": "How to use this",
    "steps": [
      "Enter essential monthly expenses ($).",
      "Enter months of coverage.",
      "Enter already saved ($).",
      "Enter monthly contribution ($).",
      "Read your emergency fund target on the right — it updates as you type.",
      "Hit Share to keep the scenario or send it to someone."
    ]
  },
  "scenarios": [
    {
      "name": "Conservative",
      "description": "Lower-end numbers — what if things land soft?",
      "values": {
        "expenses": 2300,
        "months": 4,
        "saved": 3000,
        "monthly": 350
      }
    },
    {
      "name": "Typical",
      "description": "Defaults — the most common real-world setup.",
      "values": {
        "expenses": 3800,
        "months": 6,
        "saved": 5000,
        "monthly": 600
      }
    },
    {
      "name": "Ambitious",
      "description": "Higher-end numbers — what if things really pop?",
      "values": {
        "expenses": 6100,
        "months": 10,
        "saved": 8000,
        "monthly": 950
      }
    }
  ],
  "limitations": [
    "Results are estimates before tax, fees, and inflation unless an input explicitly covers them.",
    "Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.",
    "This is educational maths, not financial advice. Check anything contractual with the lender or your accountant."
  ],
  "faq": [
    {
      "q": "How does the emergency fund calculator work?",
      "a": "Three to six months of essential expenses is the standard target; variable-income earners and single-income households should aim higher. This sizes the target and tells you the monthly savings needed to hit it. The underlying maths is: Target = Essential monthly expenses × Months of coverage."
    },
    {
      "q": "What do I need to enter?",
      "a": "4 values: essential monthly expenses, months of coverage, already saved, and monthly contribution. Each field starts with a sensible default, so you can change one number at a time and watch the result move."
    },
    {
      "q": "What does the emergency fund target result mean?",
      "a": "It is returned as a money amount in US dollars and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds."
    },
    {
      "q": "Is this calculator free, and do I need an account?",
      "a": "Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser."
    },
    {
      "q": "How accurate is the result?",
      "a": "It applies the standard formula exactly, so the arithmetic is precise. Results are estimates before tax, fees, and inflation unless an input explicitly covers them."
    },
    {
      "q": "Who is this tool for?",
      "a": "It's built for anyone comparing money scenarios before committing — budgeting a payment, sanity-checking a quote, or seeing what a change in rate or term actually costs."
    }
  ],
  "related": [
    "https://www.revenuelab.fyi/toolbox/savings",
    "https://www.revenuelab.fyi/toolbox/net-worth"
  ],
  "license": "CC-BY-4.0",
  "citation": "RevenueLab — Emergency Fund Calculator (https://www.revenuelab.fyi/toolbox/emergency-fund)"
}