How Much of Your Salary Should You Invest?

The Percentage Guidelines by Age and Goal

The standard rule of thumb is 15% of gross salary including employer match. This targets a traditional retirement at age 65 with roughly 80% income replacement. For young professionals who want to retire earlier or build wealth faster, 20-25% is more appropriate. FIRE seekers target 40-70% for accelerated timelines.

Age-specific guidelines provide more nuance. In your early 20s, 10-15% is a solid starting point as you establish your career and finances. By your late 20s, aim for 15-20% as your salary grows and student loan payments potentially decrease. In your 30s, 20-25% helps you make up for any earlier shortfalls and capitalizes on peak earning years.

These percentages include all investment contributions: 401(k) contributions including employer match, Roth IRA contributions, HSA investments, and taxable brokerage investments. Do not count emergency fund savings, as that serves a different purpose. If your employer matches 4% and you contribute 6%, your effective savings rate is already 10% before any additional investing.

Finding Your Personal Number

Start by calculating your current savings rate. Add up all monthly investment contributions, including 401(k) and Roth IRA, and divide by your gross monthly income. If you earn $5,000 per month and invest $600 in your 401(k) plus $250 in a Roth IRA, your savings rate is 17%. This baseline tells you where you stand.

If you are below 15%, identify one expense you can redirect to investing. Common candidates include subscription services you rarely use, dining out one fewer time per week, or negotiating a lower rate on insurance. Redirecting $100-$200 per month from spending to investing can move your savings rate 2-4 percentage points.

The lifestyle inflation trap is the biggest threat to your savings rate. When your salary increases from $60,000 to $70,000, the temptation is to increase spending proportionally. Instead, invest at least half the raise. This naturally increases your savings rate over time without requiring you to cut current spending. After several raises, you can easily reach 20-25% while still enjoying a growing lifestyle.

Making It Work on Different Incomes

On a $40,000 salary, investing 15% means $500 per month. This is achievable for single individuals in most markets by focusing on housing costs under 30% of income, cooking at home regularly, and maintaining a modest vehicle. The key is that $500 monthly invested from age 25 to 65 at 8% returns becomes approximately $1.75 million.

On a $75,000 salary, 20% is $1,250 per month. At this income level, max out your 401(k) match, your Roth IRA at $583 per month, and invest the remainder in a taxable brokerage account. This income level provides enough margin to invest aggressively while maintaining a comfortable lifestyle in most areas.

On a $120,000+ salary, aim for 25-30%. Higher incomes often come with higher tax rates, making tax-advantaged accounts even more valuable. Max your 401(k) at $23,500, Roth IRA at $7,000, HSA at $4,300, and invest additional funds in a taxable account. At this level, the goal shifts from percentage targets to maximizing all available tax-advantaged space.

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