Inflation

A reproducible U.S. FIRE model that combines fund costs, trading friction, tax drag, cash drag, and inflation without mixing future dollars with today’s purchasing power.

Two households can both assume a 6% return and still reach FIRE at different speeds. Fees, taxes, inflation, cash drag, and lifestyle creep determine how much of the headline return actually moves the plan forward.

Inflation changes more than prices. It changes household cash-flow pressure and what asset allocation needs to protect. This article compares three U.S. household scenarios and shows how cash, fixed income, and growth assets should be rebalanced under inflation stress.

Many FIRE plans are not broken by one dramatic event. They slowly drift off course when inflation and lifestyle creep raise the spending baseline together. This guide separates macro inflation, personal inflation, and lifestyle creep so you can see what is actually delaying financial freedom.

The point of annual FIRE recalculation is not to predict the future more precisely. It is to identify which assumptions can actually break your plan. This guide walks through return, inflation, and withdrawal-rate sensitivity using a practical household example.