How Much Do You Need to Retire?
The most common rule of thumb is the 4% Rule — withdraw 4% of your portfolio in year one of retirement, then adjust for inflation each year. Based on decades of historical market data, a diversified portfolio at 4% withdrawal has historically lasted 30+ years. This means you need roughly 25× your annual expenses saved at retirement.
Example: If you need $4,000/month ($48,000/year) in retirement and expect $1,800/month from Social Security, you need $2,200/month ($26,400/year) from your portfolio. At 4%, that requires a nest egg of $660,000.
The Three-Legged Stool of Retirement Income
- Social Security — the government baseline. Check your estimated benefit at ssa.gov. Full retirement age is 67 for those born after 1960. Claiming at 62 reduces benefits by up to 30%; delaying to 70 increases them by up to 32%.
- Employer pensions / 401k — if your employer offers a 401k match, contribute at least enough to capture the full match — it's an immediate 50%–100% return on that portion.
- Personal savings & investments — IRAs, brokerage accounts, real estate. The more legs on this stool, the more stable your retirement.
The Impact of Starting Early
An investor who starts saving $500/month at age 25 and earns 7% annually will have approximately $1.3 million by age 65. The same investor starting at 35 accumulates only about $609,000 — less than half — despite saving for 30 instead of 40 years. Time is the most powerful variable in retirement planning.
Sequence of Returns Risk
One of the biggest risks in retirement is a major market downturn in the first few years of withdrawal. Even if the long-term average return is the same, a bad sequence of early returns can permanently impair a portfolio. This is why most advisors recommend holding 1–2 years of expenses in cash or short-term bonds when entering retirement — to avoid selling investments at depressed prices.
Frequently Asked Questions
What is the 4% rule and is it still valid?
The 4% rule emerged from the 1994 "Trinity Study" which analyzed historical market data and found that a 4% withdrawal rate allowed a portfolio to last 30 years in virtually all historical scenarios. Some researchers now suggest 3.3%–3.5% may be more appropriate given today's lower expected returns and longer retirements. This calculator uses the 4% rule as a default benchmark, but you can adjust the monthly expenses and return rate to model different scenarios.
How much should I have saved at each age?
Fidelity's widely-cited benchmarks suggest: 1× your salary by 30, 3× by 40, 6× by 50, 8× by 60, and 10× by 67. These are rules of thumb based on average salaries and spending patterns — your actual target depends on your expected retirement lifestyle, Social Security benefits, and planned retirement age. Use this calculator to set a personalized target.
What's the difference between a traditional 401k and a Roth 401k?
A traditional 401k uses pre-tax dollars (lowers your taxable income now) but withdrawals in retirement are taxed as ordinary income. A Roth 401k uses after-tax dollars (no immediate tax break) but qualified withdrawals in retirement are completely tax-free — including all the investment growth. If you expect to be in a higher tax bracket in retirement, Roth tends to win. If you expect lower taxes in retirement, traditional tends to win. Many advisors recommend contributing to both for tax diversification.
When should I claim Social Security?
You can claim Social Security as early as 62 (reduced benefit) or delay up to age 70 (maximum benefit). Benefits increase approximately 6%–8% per year for each year you delay past full retirement age (67). The break-even point for delaying is typically around age 80 — if you expect to live past 80, delaying pays off. If you have health concerns or need the income, claiming earlier may make sense. This is one of the most consequential financial decisions in retirement planning.
Are the results on this calculator accurate?
This calculator uses standard compound growth formulas and is mathematically accurate for the inputs provided. However, real-world retirement outcomes depend on many factors this calculator cannot predict: actual market returns (which vary year to year), tax law changes, healthcare costs, inflation variability, and changes in Social Security policy. Use this as a planning tool and directional guide, not a guarantee. A certified financial planner (CFP) can provide personalized advice for your specific situation.