Restated: “would you accept an offer to shorten the time before you can retire by 20%?”
It would take a lot of free coffee and fooseball at your current gig to make that be worth turning down,
It would take a lot of free coffee and fooseball at your current gig to make that be worth turning down,
Simple math: if you have a savings rate of 20% right now, you would double your savings rate with a 20% bump. This would halve your time to retirement.
Taxes/differences in savings rate/etc change the math, but the principle is the same: an increase in salary is a disproportionate increase in disposable income.
But it's a fun exercise in compound interest, so I'd recommend doing the math to discover how many years of extra retirement you get from working, say, a full year of 80 hour weeks, billed hourly at your current salary, at age 30.
Once you've gotten past the steep part of the salary curve, that starts to look like a really good tradeoff. Put an extra, un-looked-for, quarter million into the market early in life, and you can essentially not worry any further about saving for retirement.
That is, you can move forward spending every cent you earn (or only working as many months per year as necessary to cover expenses) and still retire as per usual at age 60.