Insurance Calculators
Disability Insurance Calculator
Work out the monthly benefit you would need if illness or injury stopped your income, after existing cover.
Monthly benefit needed
$3,400.00
- Gap after existing cover
- $2,600.00
- Months your savings cover
- 4 months
- Income replaced
- 65.4%
How this calculator works
Benefit needed = essential expenses − existing cover; savings must bridge the waiting period
- waiting period
- the deferred period before a policy starts paying
Example calculation
Illustrative example — not advice
Worked example — the disability insurance calculator as it loads, using the default figures below.
- 01Enter monthly gross income: $5,200.
- 02Enter essential monthly expenses: $3,400.
- 03Enter existing monthly cover: $800.
- 04Enter accessible savings: $15,000.
- 05Enter waiting period in months: 3.
- 06Read the monthly benefit needed from the results panel: $3,400.00.
Monthly benefit needed: $3,400.00. Gap after existing cover: $2,600.00. Months your savings cover: 4 months. Income replaced: 65.4%.
These figures come straight from the calculator above running on the values listed, so you can retype them and confirm every number yourself. Change any input and the results update immediately. Illustrative only — not a quote, offer or recommendation.
Important considerations
- Benefits are usually capped at a percentage of pre-disability income.
- A longer waiting period lowers the premium but demands more savings.
Related calculators
- Life Insurance Needs CalculatorHow much life cover your household needs.
- Emergency Fund CalculatorEmergency fund target and time to build it.
- Term Life Insurance CalculatorEstimated premium for level term cover.
- Health Insurance Cost CalculatorTotal annual cost of a health plan.
- Human Life Value CalculatorPresent value of your future earnings.
- HSA Contribution CalculatorHSA balance and the tax it saves.
Terms used here
Frequently asked questions
How long a waiting period should I choose?
Match it to the number of months your savings and sick pay can genuinely cover.
Disclaimer
Legamoney calculators are educational tools. Results are estimates based on the figures you enter and do not constitute financial, tax or legal advice.
Last reviewed 2026-08-01