#opportunity-cost

Most sabbatical calculators show cash drawdown and stop. The honest math is 15× higher because foregone earnings compound to retirement. We modeled four common scenarios — three are cheaper than you think; one creates a NET positive lifetime impact.

Coffee gets the headlines. Car payments and rent upgrades quietly cost 3× more. Here's the math on why daily small spending is the wrong target and structural recurring spending is the right one.

$500/month sounds like a win. Strip out hours, expenses, self-employment tax, and unpaid admin time, and most side hustles pay below minimum wage. Here's the actual ROI math, plus when a side hustle makes sense anyway.

The average US household runs 12 active subscriptions. The 2-3 you forgot about are usually $30-50/month. That's $13K-$26K of forgone investment growth over 20 years, just from the ones you weren't using.

Every dollar you spend has a second price: the future value you didn't keep. Here's how to use that frame for big decisions, and ignore it for the small ones.