> They'll let you go and try to find a replacement. This is an oft-repeated trope, but it has little basis in reality. Engineering managers have trouble convi

> They'll let you go and try to find a replacement. This is an oft-repeated trope, but it has little basis in reality. Engineering managers have trouble convincing their managers / HR to provide market raises, because most of them are stuck in their own little bubble where the current salaries are "market value." They buy salary information from companies who tell them what they want to hear, that the company's below market salaries are inline with the market. Wanna prove HR wrong? The only way to do that is to walk in with an offer letter. At that point, HR will look at the reliable salary reports and determine if that's viable. You aren't getting fired by negotiating for a market raise via offer letter. Also, good luck finding a replacement for less anyway.