How Much Do You Need to Retire?
The most widely used retirement planning rule is the 4% rule: at retirement, you can safely withdraw 4% of your portfolio each year and have a very high probability of not running out of money over a 25–30 year retirement. This means to replace $4,000/month in income from savings alone, you need a portfolio of $1.2 million ($4,000 × 12 / 0.04).
Fidelity Investments publishes benchmarks for how much you should have saved by each decade: 1x your salary by age 30, 3x by 40, 6x by 50, 8x by 60, and 10x by retirement. These are starting points — your actual number depends on your expected lifestyle, Social Security benefits, and whether you have a pension or other income sources.
The single most powerful lever is time, not the return rate. Starting at 25 instead of 35 — just 10 years earlier — can nearly double your nest egg at retirement due to compounding. The second most powerful lever is savings rate. Increasing contributions from 10% to 15% of income adds hundreds of thousands of dollars over a career. Investment returns matter, but they're largely outside your control.
For tax efficiency, most financial educators recommend this priority order: first, contribute enough to your 401(k) to capture any employer match (free money). Then max out a Roth IRA if income-eligible. Then max out your 401(k). Then invest in a taxable brokerage. Robo-advisors like Betterment and Wealthfront can automate this entire process.
Frequently Asked Questions
How much should I save for retirement each month?
The standard guideline is 15% of gross income, including any employer match. If you start late or have an aggressive retirement date, 20–25% may be needed. If you're just starting out and can only afford 5–10%, start there and increase by 1% each year — the increase is barely noticeable but the long-term impact is enormous.
What is the 4% rule for retirement withdrawals?
The 4% rule, based on the Trinity Study, suggests that retirees can withdraw 4% of their portfolio in year one and adjust for inflation each subsequent year, with a historically high probability of the portfolio lasting 30 years. A $1 million portfolio generates $40,000/year ($3,333/month) under this rule. Some modern planners use 3–3.5% for longer retirements or lower return environments.
What is the difference between a 401(k) and a Roth IRA?
A traditional 401(k) uses pre-tax dollars — you reduce taxable income now and pay taxes on withdrawals in retirement. A Roth IRA uses after-tax dollars — no deduction now, but withdrawals in retirement are completely tax-free. Generally, Roth accounts favor younger earners in lower tax brackets; traditional accounts favor higher earners who expect a lower tax bracket in retirement.
Which robo-advisors are best for retirement savings?
Betterment and Wealthfront are the most popular robo-advisors for retirement savings, offering automated portfolio management, tax-loss harvesting, and goal-based planning at around 0.25% annually. M1 Finance offers commission-free automated investing with more control over portfolio composition. For pure low-cost index fund investing, Vanguard and Fidelity remain the gold standard with expense ratios as low as 0.03%.
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