{
  "slug": "hoa-special-assessment",
  "title": "HOA Special Assessment Calculator",
  "heading": "HOA Special Assessment Calculator",
  "category": "financial",
  "url": "https://www.revenuelab.fyi/toolbox/hoa-special-assessment",
  "summary": "Your share of a capital project, and what financing it costs.",
  "description": "When reserves fall short, the association splits the shortfall across owners by ownership interest. See your lump-sum share, the monthly equivalent if the board finances it, and the total interest cost of a loan.",
  "formula": "Share = (project cost − reserves) × your ownership interest; financed payment uses standard amortization.",
  "dateModified": "2026-09-30",
  "run_url": "https://www.revenuelab.fyi/api/public/calc?tool=hoa-special-assessment",
  "inputs": [
    {
      "id": "project",
      "label": "Total project cost",
      "kind": "number",
      "hint": null,
      "default": 1200000,
      "unit": "$",
      "min": 0,
      "max": null
    },
    {
      "id": "reserves",
      "label": "Reserves applied",
      "kind": "number",
      "hint": null,
      "default": 300000,
      "unit": "$",
      "min": 0,
      "max": null
    },
    {
      "id": "units",
      "label": "Units in the association",
      "kind": "number",
      "hint": null,
      "default": 120,
      "unit": null,
      "min": 1,
      "max": null
    },
    {
      "id": "interestPct",
      "label": "Your ownership interest",
      "kind": "number",
      "hint": null,
      "default": 0,
      "unit": "%",
      "min": 0,
      "max": 100
    },
    {
      "id": "apr",
      "label": "Association loan APR",
      "kind": "number",
      "hint": null,
      "default": 7.5,
      "unit": "%",
      "min": 0,
      "max": 25
    },
    {
      "id": "termYears",
      "label": "Loan term",
      "kind": "number",
      "hint": null,
      "default": 10,
      "unit": "years",
      "min": 1,
      "max": 30
    }
  ],
  "outputs": [
    {
      "id": "share",
      "label": "Your assessment",
      "format": "currency",
      "hint": null,
      "primary": true
    },
    {
      "id": "pmt",
      "label": "Monthly payment if financed",
      "format": "currency",
      "hint": null,
      "primary": false
    },
    {
      "id": "totalPaid",
      "label": "Total paid over the term",
      "format": "currency",
      "hint": null,
      "primary": false
    },
    {
      "id": "interest",
      "label": "Interest cost",
      "format": "currency",
      "hint": null,
      "primary": false
    }
  ],
  "worked_example": {
    "inputs": [
      "Total project cost: 1200000 $",
      "Reserves applied: 300000 $",
      "Units in the association: 120",
      "Your ownership interest: 0 %",
      "Association loan APR: 7.5 %",
      "Loan term: 10 years"
    ],
    "outputs": [
      "Your assessment: $7,500",
      "Monthly payment if financed: $89.03",
      "Total paid over the term: $10,683",
      "Interest cost: $3,183"
    ]
  },
  "how_to": {
    "title": "How to use this",
    "steps": [
      "Enter total project cost ($).",
      "Enter reserves applied ($).",
      "Enter units in the association.",
      "Enter your ownership interest (%).",
      "Enter association loan apr (%).",
      "Enter loan term (years).",
      "Read your your assessment 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": {
        "project": 720000,
        "reserves": 180000,
        "units": 72,
        "interestPct": 0,
        "apr": 7.5,
        "termYears": 6
      }
    },
    {
      "name": "Typical",
      "description": "Defaults — the most common real-world setup.",
      "values": {
        "project": 1200000,
        "reserves": 300000,
        "units": 120,
        "interestPct": 0,
        "apr": 7.5,
        "termYears": 10
      }
    },
    {
      "name": "Ambitious",
      "description": "Higher-end numbers — what if things really pop?",
      "values": {
        "project": 1920000,
        "reserves": 480000,
        "units": 192,
        "interestPct": 0,
        "apr": 7.5,
        "termYears": 16
      }
    }
  ],
  "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": "Can I pay it off early?",
      "a": "Most association loan programs let individual owners prepay their share in full at closing or during the term, which removes the interest portion."
    },
    {
      "q": "Does the assessment transfer if I sell?",
      "a": "Unpaid balances usually stay with the unit and appear on the estoppel certificate at closing, so buyers negotiate over who absorbs them."
    }
  ],
  "related": [],
  "license": "CC-BY-4.0",
  "citation": "RevenueLab — HOA Special Assessment Calculator (https://www.revenuelab.fyi/toolbox/hoa-special-assessment)"
}