{
  "slug": "annual-vs-monthly-billing",
  "title": "Annual vs Monthly Billing Calculator",
  "heading": "Annual vs Monthly Billing Calculator",
  "category": "financial",
  "url": "https://www.revenuelab.fyi/toolbox/annual-vs-monthly-billing",
  "summary": "Is the annual plan discount worth paying upfront?",
  "description": "Annual plans discount 10–20% but lock up cash. This compares the saving to what the same cash would earn, and shows the effective return on prepaying.",
  "formula": "Net = (monthly × 12 − annual) − annual × return × 0.5.",
  "dateModified": "2026-09-30",
  "run_url": "https://www.revenuelab.fyi/api/public/calc?tool=annual-vs-monthly-billing",
  "inputs": [
    {
      "id": "monthly",
      "label": "Monthly price",
      "kind": "number",
      "hint": null,
      "default": 49,
      "unit": "$",
      "min": null,
      "max": null
    },
    {
      "id": "annual",
      "label": "Annual price",
      "kind": "number",
      "hint": null,
      "default": 490,
      "unit": "$",
      "min": null,
      "max": null
    },
    {
      "id": "opportunity",
      "label": "Return on your cash",
      "kind": "number",
      "hint": null,
      "default": 4.5,
      "unit": "%",
      "min": 0,
      "max": null
    }
  ],
  "outputs": [
    {
      "id": "net",
      "label": "Net benefit of annual",
      "format": "currency",
      "hint": null,
      "primary": true
    },
    {
      "id": "saving",
      "label": "Headline saving",
      "format": "currency",
      "hint": null,
      "primary": false
    },
    {
      "id": "discount",
      "label": "Effective discount",
      "format": "percent",
      "hint": null,
      "primary": false
    },
    {
      "id": "carry",
      "label": "Cost of cash tied up",
      "format": "currency",
      "hint": null,
      "primary": false
    }
  ],
  "worked_example": {
    "inputs": [
      "Monthly price: 49 $",
      "Annual price: 490 $",
      "Return on your cash: 4.5 %"
    ],
    "outputs": [
      "Net benefit of annual: $86.98",
      "Headline saving: $98.00",
      "Effective discount: 16.7%",
      "Cost of cash tied up: $11.03"
    ]
  },
  "how_to": {
    "title": "How to use this",
    "steps": [
      "Enter monthly price ($).",
      "Enter annual price ($).",
      "Enter return on your cash (%).",
      "Read your net benefit of annual 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": {
        "monthly": 29,
        "annual": 295,
        "opportunity": 2.6999999999999997
      }
    },
    {
      "name": "Typical",
      "description": "Defaults — the most common real-world setup.",
      "values": {
        "monthly": 49,
        "annual": 490,
        "opportunity": 4.5
      }
    },
    {
      "name": "Ambitious",
      "description": "Higher-end numbers — what if things really pop?",
      "values": {
        "monthly": 78,
        "annual": 785,
        "opportunity": 7.2
      }
    }
  ],
  "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 annual vs monthly billing calculator work?",
      "a": "Annual plans discount 10–20% but lock up cash. This compares the saving to what the same cash would earn, and shows the effective return on prepaying. The underlying maths is: Net = (monthly × 12 − annual) − annual × return × 0.5."
    },
    {
      "q": "What do I need to enter?",
      "a": "3 values: monthly price, annual price, and return on your cash. 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 net benefit of annual 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/subscription-audit",
    "https://www.revenuelab.fyi/toolbox/software-stack-cost-per-employee"
  ],
  "license": "CC-BY-4.0",
  "citation": "RevenueLab — Annual vs Monthly Billing Calculator (https://www.revenuelab.fyi/toolbox/annual-vs-monthly-billing)"
}