# Income Protection Needs Calculator — United Kingdom

> Estimate benefit and waiting-period cash needs using an actual policy replacement percentage and offset rule. GBP planning view; stated limitations apply.

Page: https://askcalculators.com/uk/income-protection/
Definition: https://askcalculators.com/uk/income-protection/definition.json
JSON Schema: https://askcalculators.com/uk/income-protection/schema.json
Version: 20.16.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/uk/income-protection/?monthlyIncome=4000&replacement=60&otherMonthlyBenefit=0&essentialMonthlySpending=2500&waitingDays=90&benefitMonths=24&annualPremium=0&annualFees=0&monthlyFee=0&spreadPercent=15

## Inputs
- monthlyIncome: Monthly income being protected; type=money; required; default=4000; min=0; max=1000000000000
- replacement: Entered benefit replacement percentage; type=percent; required; default=60; min=0; max=100
- otherMonthlyBenefit: Other income offset under the actual policy; type=money; required; default=0; min=0; max=1000000000000
- essentialMonthlySpending: Essential monthly household spending; type=money; required; default=2500; min=0; max=1000000000000
- waitingDays: Contract waiting period, days; type=number; required; default=90; min=0; max=730
- benefitMonths: Selected payable benefit months; type=number; required; default=24; min=0; max=600
- annualPremium: Actual quoted annual premium; type=money; required; default=0; min=0; max=1000000000000
- annualFees: Annual policy/administration fees; type=money; required; default=0; min=0; max=1000000000000
- monthlyFee: Additional installment fee per month; type=money; required; default=0; min=0; max=1000000000000
- spreadPercent: Quote sensitivity range; type=percent; required; default=15; min=0; max=100

## Outputs
- monthlyBenefit: Modeled monthly benefit after offset; format=currency; primary
- waitingReserve: Waiting-period spending reserve; format=currency
- termBenefit: Undiscounted benefit over entered payable months; format=currency
- annualPremium: Entered annual premium; format=currency
- annualCost: Annual premium and payment fees; format=currency
- monthlyEquivalent: Monthly equivalent cost; format=currency
- low: Low quote scenario; format=currency
- high: High quote scenario; format=currency

## Formula
monthly benefit = maximum(0, protected monthly income × replacement fraction − policy offsets).

Inputs are converted to canonical units before evaluating this stated formula.

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.

Notice: Illustrative defaults are not local quotes or verified legal rules. Dated reference components and user-entered assumptions are explicitly distinguished. Professional review is pending.