Lifestyle Inflation Calculator

About this calculator

Lifestyle inflation (also called lifestyle creep) is the tendency for spending to rise in step with income — a raise or promotion quietly gets absorbed into a bigger apartment, a nicer car, more takeout, and pricier subscriptions instead of translating into higher savings. It's a well-documented behavioral-finance pattern, not a formal financial formula, but its effect compounds like one: a spending increase that seems trivial in a single month adds up to a large number once multiplied across twelve months and stacked year after year.

This calculator takes your current annual spending and a rate of yearly increase and projects how much your costs grow year by year, showing both the new annual spending level and the cumulative extra amount spent compared to holding costs flat. It's a way to see, in concrete dollars, what unchecked lifestyle creep costs against simply keeping your spending level while your income grows.