Disability Income Coverage Gap Method, Formula & Examples
On this page
This method guide explains the calculation sequence behind the Disability Income Coverage Gap Calculator. It owns formulas, input definitions, timing, rounding and reference checks; the calculator remains the only page that performs the numeric scenario.
Calculation sequence
The entered replacement percentage is capped by the monthly benefit maximum. The result applies the selected tax scenario, adds other dependable income and compares the total with entered monthly need.
Inputs and evidence
Use current written documents for every material input. The calculator supports: Market and currency, Monthly pre-disability income, Monthly household cash need, Other dependable monthly income, Benefit replacement percentage, Monthly benefit cap, Benefit tax treatment, Entered tax rate on taxable benefit, Elimination period, Liquid savings available.
Reference example
Sixty percent of 8,000 is 4,800. If taxable at 25%, the modeled net is 3,600; adding 1,000 other income leaves a 1,400 gap against a 6,000 need.
Boundary and error checks
Test zero-rate branches where available, minimum and maximum supported inputs, and a scenario in which the main result reverses. Reject blank, non-finite or out-of-range values rather than silently substituting them.
Model boundary
The tool does not determine occupation class, eligibility, claim approval, tax law, premium, benefit duration, Social Security or public-program entitlement.
Sources and review status
- NAIC — How Insurance Works
- NAIC — Consumer insurance resources
- Financial Consumer Agency of Canada — Insurance
Sources and model boundaries checked 2026-10-08. This new opportunity-map expansion has automated formula, fixture and source QA but has not been represented as human editorial review. Keep the route noindex until CalculatorGeek records a completed YMYL editorial review.