The gap people don't plan for
Most workers can name their life insurance number and have no idea what their disability coverage would pay. That is backwards: a working-age adult is roughly three times more likely to be disabled than to die before retirement, and the financial damage of a disability is usually larger because it hits income rather than replacing it. The question is simple — what would I actually live on if I couldn't work? — and the answer is rarely the number on the benefits page.
This tool runs that arithmetic with the coverage you already have, so the result is the monthly shortfall a private policy or savings plan has to fill.
Why 60–70% and not 100%
Insurers cap disability replacement near 70% of gross for a reason: it holds your standard of living roughly intact while work-related expenses (commuting, work clothes, lunches, payroll taxes on the benefit) fall away. A 100% replacement target also removes any financial incentive to return to work, which is why policies are structured to avoid it. Running the calculator at 60% and 70% brackets the realistic range.
The tax asterisk
Group LTD is typically taxed if your employer paid the premium — a 60% gross benefit can become closer to 40% of take-home. Individual disability policies are generally tax-free benefits when you paid the premiums yourself. Because tax treatment swings the real number, the calculator states the assumption in its note and you should apply your own benefit-tax status when reading the gap.
Hypothetical example
A project manager earning $6,500/month targets 60% replacement ($3,900). Their employer LTD replaces 50% ($3,250) and they own no private disability and expect no SSDI. The monthly gap is $650 — about $7,800/year — which a small individual policy or a larger emergency drawdown must cover. If a 180-day elimination period fits their savings, the monthly premium for the closing policy is modest. This is a hypothetical illustration, not a quote or a policy recommendation.
What this calculator does not account for
- The tax status of your specific benefits and income sources
- Bonus, commission, and overtime pay that group LTD usually excludes
- Cost-of-living and residual/partial disability provisions
- Pre-existing-condition exclusions and medical underwriting outcomes
- State short-term disability and paid-family-leave programs
For executives & high-net-worth principals
Disability risk hits executives hardest, because the income at stake — base salary, bonus, equity, carried interest — is both large and, often, only partially covered by a group LTD plan that caps benefits and excludes compensation components. A founder or executive should run the gap twice: once with just the group policy, and once assuming bonus and equity vanish, which often reveals a six-figure annual shortfall. An own-occupation individual policy that covers your actual specialty is usually the highest-value coverage decision a high earner makes, and it is also one of the few you generally cannot buy after a health event.