What is lifestyle creep and how do I prevent it?

Lifestyle creep – also called lifestyle inflation – is when your spending rises to match every increase in income, so a bigger paycheck never actually leaves you better off. A $20,000 raise turns into a costlier apartment, a car payment, and pricier habits, and your savings rate stays flat. The fix is to anchor on savings rate, not dollars: each time income rises, raise the percentage you save before lifestyle expands. Automating the new savings off the top is the most reliable guard, because money you never see in checking can't creep. It also helps to keep big fixed costs – housing and cars – stable even as income grows, since those are the hardest to walk back. Track your savings rate over time, not just your balance, so creep can't hide.