🎯 Beat Lifestyle Inflation
The silent killer of 30s wealth isn't bad investing — it's good raises spent completely. Income up 50%, savings rate flat at 5%. The math is brutal: if you spend everything you earn, you must keep earning forever.
Questions this step answers
Why this matters
Steps 1–4 build the engine. This step keeps you from drilling holes in the fuel tank. Lifestyle inflation is invisible because each upgrade feels earned — the nicer car, the bigger apartment, the upgraded everything. Individually reasonable; collectively, they convert a $150k income into a $60k-income savings rate.
The framework — the raise splitter
Every raise, save half and spend half. $80k → $100k raise? Bank $10k/year, enjoy $10k. Your lifestyle still rises — but your savings rate rises faster. Over a decade of 3% raises, the splitter quietly builds a six-figure gap between you and the lifestyle-inflation trap.
The scoreboard: track net worth quarterly, not your salary. Net worth = everything you own minus everything you owe. When it grows faster than your income, you're winning.
Coast FI preview: once your invested assets can grow to retirement needs WITHOUT new contributions, you've hit Coast FI — work becomes optional-ish. Run the numbers; it's closer than you think for aggressive 30s savers.
New car or keep the old one — cash or finance?
Run the 20/4/10 rule: 20% down, a loan term of 4 years max, and total car costs (payment, insurance, fuel) under 10% of your gross income. If the car you want breaks the rule, it's too much car.
And weigh the opportunity cost honestly: a $600/month payment invested at 8% for 10 years grows to roughly $110,000. The usual winning move: buy reliable used, pay it off fast, then redirect the “payment” into your investments.
Living paycheck to paycheck on a good salary — what gives?
It's almost never an income problem — it's a systems problem: no automatic savings, and lifestyle rising with every raise.
The fix: auto-transfer savings the day after payday (e.g., $1,200 of an $8,000 take-home), then split every future raise 50/50 between saving and spending. You adjust to what's left.
Exception: if debt above ~20% APR is eating the paycheck, kill that first — automation can't outrun expensive debt.
Do this this week
- Write down your current savings rate (be honest)
- Set the rule: 50% of the next raise gets auto-invested
- Calculate your net worth (accounts minus debts)
- Run a Coast FI check with the compound calculator
⚠️ Common mistakes
- "I'll save when I earn more" (you won't — lifestyle expands).
- Car payments as a permanent lifestyle (a $600/mo payment invested at 8% for 10 years ≈ $110k).
- Comparing spending to peers instead of to your goals.