Promotion lifetime value.

A promotion's value isn't just the immediate salary increase - it's the lifetime compounding effect. 5k raise today compounds via annual % increases over decades. The total lifetime value of a single promotion can be 50-100x the year-1 increase amount. This tool quantifies the long-term value to inform negotiation and effort decisions.

50k salary, 15% promotion increase = 57,500 (7,500 boost year 1). Compounded at 3% annual growth over 25 years to retirement: total lifetime boost 278,000. That 7,500 raise becomes 278k of lifetime earnings - 37x the year-1 value through compounding.

Implications: even small promotion percentages have massive lifetime value when years from retirement are long. A 10% raise at age 30 with 35 working years left typically delivers 400k+ lifetime boost. Worth significant effort to obtain. By age 55 (10 years to retirement), same 10% raise delivers only 80k-120k lifetime - smaller stakes.

Quick example

With current salary of 50,000 and promotion increase of 15% (plus years until retirement of 25 years and annual growth of 3%), the result is 273,444.48. Change any figure and watch the output shift — it's often more useful to see the pattern than to memorise the formula.

Which inputs matter most

You enter Current Salary, Promotion Increase %, Years Until Retirement, and Annual Growth %. Frequency and unit price pull the total in different directions. The biggest surprise for most people is how small recurring amounts compound into large annual figures — that's where this calculation earns its keep.

What's happening under the hood

Year 1 boost = current × increase %. Each year compounds at growth rate. Total = sum of all years. The formula is listed in full below. If the number looks off, you can retrace the calculation by hand — that's the point of showing the working.

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.