A raise isn't just more money this year — it compounds for your entire career. See the real number.
When you get a 10% raise, most people just think "nice, more money this year." But here's what actually happens: every future raise is calculated from a higher base. Every 401k match is a percentage of a larger salary. Every Social Security benefit is based on your lifetime earnings. And if you invest any of that extra income, it compounds for decades.
A $8,500 raise on an $85,000 salary today becomes the new floor. Next year's 3% cost-of-living increase is 3% of $93,500, not $85,000. That $510 annual difference doesn't sound like much — but over 30 years of compounding, it adds up to over $40,000 in additional earnings before any investing.
The real power comes from investing a portion of the raise. Even investing 50% of the after-tax increase into the market at 7% annual return turns a single raise into a potentially life-changing sum over a career.
Research consistently shows that people who negotiate at job offers earn significantly more over their careers than those who accept the first number. The typical cost of not negotiating a $5,000 difference: $500,000+ over 30 years, including invested savings.
Use your marginal rate on the incremental income — this is typically your highest bracket, since the raise pushes income above your current level. The after-tax take-home is what actually matters for lifestyle and investment decisions.