Calculate calendar days, modeled payable days, benefit months, and a gross benefit scenario from user-entered dates and policy assumptions.
Formula
const start = new Date(String(inputs.benefitStartDate || '') + 'T00:00:00Z'); const end = new Date(String(inputs.benefitEndDate || '') + 'T00:00:00Z'); const validDates = Number.isFinite(start.getTime()) && Number.isFinite(end.getTime()) && end >= start; const elapsedCalendarDays = validDates ? Math.floor((end.getTime() - start.getTime()) / 86400000) + 1 : 0; const eliminationDays = Math.max(0, Number(inputs.eliminationPeriodDays || 0)); const modeledPayableDays = Math.max(0, elapsedCalendarDays - eliminationDays); const rawBenefitMonths = modeledPayableDays / 30.4375; const modeledBenefitMonths = Math.round(rawBenefitMonths * 100) / 100; const monthlyBenefit = Math.max(0, Number(inputs.monthlyBenefitAmount || 0)); const payableShare = Math.min(1, Math.max(0, Number(inputs.assumedPayableShare || 0) / 100)); const grossBenefitScenario = Math.round((rawBenefitMonths * monthlyBenefit * payableShare) * 100) / 100; return { elapsedCalendarDays, modeledPayableDays, modeledBenefitMonths, grossBenefitScenario };Scenario Start Date
2026-01-01
Scenario End Date
2027-12-31
Elimination Period (days)
90
Monthly Benefit Amount ($)
5,000
Assumed Payable Share (%)
100
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With the default dates of January 1, 2026 through December 31, 2027, the inclusive timeline is 730 calendar days. Subtracting a 90-day elimination period leaves 640 modeled payable days, or 21.03 average calendar months. At $5,000 per month and a 100% assumed payable share, the gross benefit scenario is $105,133.47.
Use this legal calculator to compare scenarios before committing money, time, or a provider conversation.
The estimate combines Scenario Start Date, Scenario End Date, Elimination Period (days) and returns Elapsed Calendar Days, Modeled Payable Days, Modeled Benefit Months.
If the result changes your decision, verify the current quote, rate, eligibility rule, or provider term before acting.
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This calculator produces informational estimates only. It does not constitute legal advice, does not create an attorney-client relationship, and should not be relied upon for legal decisions. Laws vary by jurisdiction. Consult a qualified attorney for your specific situation.
Reviewed by the CalculateThis.ai editorial team. Updates: check back for latest parameters. Tools are for estimation only — verify with current provider terms.