Starting a new job in the middle of a calendar year? Want to max out employer contribution match? Use this.

401k-contribution-calculator.ipynb

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   "cell_type": "code",
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   "source": [
    "from datetime import date\n",
    "\n",
    "salary = int(input('Salary'))\n",
    "employerMax = int(input('Contribution % to get max free money'))\n",
    "today = date.today()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Assuming paychecks are semi-monthly\n",
    "payCycles = 24\n",
    "cyclesPerMonth = 2\n",
    "remainingPayCycles = payCycles - (today.month - 1) * cyclesPerMonth - (today.day > 15)\n",
    "\n",
    "print('Remaining pay cycles: ' + str(remainingPayCycles))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "employerContributionTarget = salary * (employerMax/100)\n",
    "employeeContributionPerCycle = employerContributionTarget / remainingPayCycles\n",
    "employeeContributionPercentage = employeeContributionPerCycle / salary * 100 * 24\n",
    "\n",
    "\n",
    "print(f'Employer contribution per cycle: {employeeContributionPerCycle} - {employeeContributionPercentage}%' )"
   ]
  }
 ],
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