jackpot-annuity

Generate a growing annuity schedule, calculate its present value and export the payments to CSV. The library works in Node.js 20+ and modern browsers with no runtime dependencies. Dollar inputs become integer-cent monetary outputs.

For an interactive comparison with federal and state tax estimates, use the lottery annuity calculator. This package models payments before tax. It does not fetch live jackpots.

• API reference
  • calculateAnnuity(options)
  • annuitySchedule(totalCents, payments=30, growthRate=0.05)
  • presentValue(cashFlows, discountRate=0.04, timing=’due’)
  • parseAmount(value)
  • toCSV(result)
  • Validation errors
• Formulas and assumptions
  • Taxes and current jackpot data
• Examples
  • Generate a schedule
  • Immediate versus ordinary payments
  • CLI export
  • Browser example
• Compare a supplied cash offer
  • Run the example
  • Change the discount assumption
  • CSV reconciliation and rounding

Installation

npm install jackpot-annuity
npx jackpot-annuity 450M --format csv > schedule.csv

Related

• Export annuity schedules to CSV without losing cents is a step-by-step tutorial built on this package.

• The Jackpot Annuity editor extension on Open VSX generates CSV or JSON schedules inside VS Code or VSCodium, offline.

Source and bugs

The source repository includes a browser demonstration, cross-platform tests, package verification and an MIT license. Report bugs in Issues.