Cash value of contractual notice.

A six-month notice period at 6,000 monthly salary plus 500 of monthly benefits is worth 39,000 of guaranteed income — gross. After 30% tax that is 27,300. Knowing this number changes how you weigh job offers with longer or shorter notice periods.

How to use it

Enter monthly gross salary, the notice period in months, monthly benefits value (pension match, health insurance, car allowance), and your marginal tax rate.

What the result means

The notice value is your downside cushion if you are made redundant or let go. Long notice periods are valuable in unstable industries; in stable, fast-moving careers they can lock you in to declining employers.

This is contractual base only — discretionary bonuses, equity vesting accelerations and statutory redundancy are not modelled. Add those separately if relevant.

A worked example

Try the defaults: monthly gross salary of 6,000, notice period of 6, monthly benefits value of 500, marginal tax rate of 30%. The tool returns 39,000.00. You can adjust any input and the result updates as you type — no submit button, no reload. That's the real power here: seeing how sensitive the output is to one or two assumptions.

What moves the number most

The result responds to Monthly Gross Salary, Notice Period, Monthly Benefits Value, and Marginal Tax Rate. Not every input has equal weight. Flip one at a time toward extreme values to feel which ones move the needle most for your situation.

The formula behind this

Gross value is monthly salary plus monthly benefits multiplied by the notice months. Net value applies the marginal tax rate to the gross. Statutory redundancy and severance enhancements are not modelled. Everything the calculator does is shown in the formula box below, so you can check the math against your own spreadsheet if you want.

Why small rate shifts add up

A 3% pay rise looks modest. Apply it over a 30-year career with modest promotions and the lifetime difference runs to six figures. This calculator makes that invisible compounding visible in a way spreadsheets usually don't.

What this doesn't capture

Tax bands, pension contributions, student-loan deductions, and benefits-in-kind sit outside this calculation. The figure is the headline; your actual position depends on local tax rules and personal circumstances. Pair with a dedicated take-home calculator for the full picture.