You should consider whether the pay increase really is a pay increase per actual work hour (including overtime), and considering that you might be moving up to a higher tax bracket.<p>When I say work hour, keep in mind that places that honor overtime pay policies do so at higher rates (IIRC 1.5x base hourly rate). Realistically, that's pretty generous considering the level of exploitation some companies get away with, but remember that in addition to adding a work day, a 6-day week <i>subtracts one rest day</i>.<p>That means you get roughly half the number of days other people would for socializing, family time, errands, house chores, etc. The higher work-to-rest ratio can also negatively affect your health and your romantic relationship (or limit your prospects, if you're not in one).<p>If the pay increase involves relocation, also consider cost of living, house prices and future employment potential.<p>If the pay increase involves a change in type of employment type, again, consider tax implications and benefits (particularly healthcare benefits)