The Core Rules That Still Work
Core net worth rules of thumb and their 2025 validity
| Rule | What It Says | Does It Hold in 2025? |
|---|---|---|
| 1× salary by 30 | Net worth ≥ annual salary at age 30 | Yes, if you started investing at 22–25 |
| 3× salary by 40 | Net worth ≥ 3× salary at 40 | Yes for most income levels |
| 25× expenses rule | Need 25× annual spending to retire | Yes (4% withdrawal rate basis) |
| 20% savings rate | Save/invest 20% of gross income | Yes — still the gold standard |
| 28% housing rule | Keep housing ≤28% of gross income | Yes, though 25% is better |
| 6-month emergency fund | Hold 6 months of expenses in cash | Still relevant in 2025 |
The Outdated Rules to Update
Some rules made sense in 1995 but haven’t kept pace with reality. The '100 minus your age in stocks' rule — which would put a 40-year-old in 60% stocks — is far too conservative given longer life expectancies and low bond yields of the 2010s. Most advisors now use '110 minus age' or even '120 minus age' for the equity allocation.
In 1995, $1 million was a solid retirement target for most Americans. In 2025, $1 million at 65 supports roughly $40,000/year in withdrawals (4% rule). In high-cost cities with medical expenses factored in, that’s tight. A better 2025 target: 25× your actual expected annual retirement spending.
The Rule Nobody Talks About: Liquid Net Worth
Total net worth includes home equity, retirement accounts, and illiquid assets. Liquid net worth — cash plus taxable investments — is what you actually have access to without penalties or selling your house. A useful 2025 rule: your liquid net worth should be at least 50% of your total net worth by age 50. Below that, you’re house-rich and cash-poor.
Liquid vs. total net worth targets by age
| Age | Total NW Target | Liquid NW Target | Home Equity Cap |
|---|---|---|---|
| 35 | 2× salary | 0.8× salary | 50% of total NW |
| 45 | 4× salary | 2× salary | 40% of total NW |
| 55 | 7× salary | 4× salary | 35% of total NW |
| 65 | 10× salary | 7× salary | 30% of total NW |
The Debt Rules That Actually Protect Wealth
- No consumer debt above 10% interest rate — period
- Car payment should never exceed 10% of monthly take-home
- Total debt payments should stay below 36% of gross income (DTI ratio)
- Credit cards: carry zero balance or don’t carry the card
- Student loans: target payoff within 10 years of graduation
A useful 2025 benchmark: your net worth should grow by at least 10% per year in your 20s–40s. At $100,000 net worth, that’s $10,000 growth per year. At $300,000, $30,000 per year. If it’s growing slower, either savings rate or investment allocation needs adjustment.
When to Break the Rules
Rules of thumb fail at income extremes. A surgeon earning $400,000 who hit a medical school debt wall in their 30s shouldn’t feel behind for missing the '1× salary by 30' benchmark. A 25-year-old earning $40,000 with zero debt who starts investing in a LCOL city can often beat the benchmarks significantly.
Rules also fail when life events intervene: divorce cuts net worth in half for millions of Americans. Disability, major medical expenses, and caregiving responsibilities all create legitimate detours. The rules are compasses, not judgments.
Check Your Number Against the Rules
Calculate your net worth and see how it stacks up against the benchmarks that matter.