Retirement Calculator

How to Use This Calculator

Enter your current age and your target retirement age — the age at which you plan to stop working. Then enter your current retirement savings balance (the sum of all retirement accounts: 401(k), IRA, Roth IRA, and any other retirement savings), and your total monthly contribution across all accounts.

In the Expected Annual Return field, enter the average annual return you expect from your portfolio. The default of 7% is a commonly used assumption for a diversified equity portfolio, adjusted for historical context. In the Desired Annual Income field, enter how much you want to spend per year in retirement — in today's dollars. Our calculator automatically accounts for inflation.

Click Calculate Retirement to see your projected nest egg, savings goal, gap or surplus, and a year-by-year growth schedule. To refine your projection further, open the Inflation & Social Security section and enter your estimated Social Security monthly benefit (available at ssa.gov) and your expected inflation rate. Including Social Security can significantly reduce the savings you need to accumulate on your own.

How Much Do You Need to Retire?

The central question of retirement planning has a surprisingly specific answer, and it starts by working backward from your desired lifestyle. Most financial planners define “enough” using the 4% rule: multiply your desired annual retirement income by 25, and you have your savings target.

This rule says you can withdraw 4% of your portfolio in the first year of retirement, adjust that dollar amount for inflation each subsequent year, and have a high statistical probability of your money lasting 30 years. So if you want $60,000 per year in retirement income:

If Social Security will provide $18,000 per year, your savings only need to cover the remaining $42,000, reducing your target to $1,050,000. The table below shows how the goal changes based on your desired income and Social Security benefit:

The 4% Rule Explained

The 4% rule originates from the Trinity Study, a 1998 analysis by three Trinity University professors who examined historical returns for portfolios of stocks and bonds from 1926 to 1995. They found that a retiree withdrawing 4% of an initial portfolio (adjusted annually for inflation) had a very high probability of not outliving their money over a 30-year period — even through market downturns like the Great Depression and the 1970s stagflation era.

The rule works because well-diversified equity portfolios have historically generated returns that exceed the 4% withdrawal rate plus inflation over long periods. On a $1,000,000 portfolio with 7% average annual returns and 3% inflation, a 4% withdrawal ($40,000 in year one) leaves the portfolio growing in real terms — effectively replenishing what was withdrawn in good years, and drawing down reserves modestly in bad ones.

There are important caveats. The 4% rule assumes a 30-year retirement. If you retire at 55 and live to 95, a 40-year horizon may require a more conservative 3%–3.5% rate. The rule also assumes a diversified portfolio with significant equity exposure — a purely bond portfolio or cash-heavy allocation would not support 4% withdrawals sustainably. Finally, the rule does not account for large one-time expenses like healthcare events. Use it as a starting point, not a guarantee.

The Formula: How Your Nest Egg Is Projected

This calculator uses the future value of an annuity formula to project your retirement balance. It compounds your current savings and adds your monthly contributions each period, computing interest on the growing balance month by month. The full formula for a retirement projection with regular contributions is:

Example: You are 35, retiring at 67 (32 years = 384 months). Current savings: $50,000. Monthly contribution: $800. Expected return: 7%/year (0.5833%/month).

The contributions term dwarfs the initial savings term over long horizons. This is why consistent monthly contributions matter more than the starting balance — especially early in your career.

The Power of Starting Early

The single most impactful retirement decision you can make is to start investing as early as possible. Time amplifies compound interest exponentially — each additional year of growth produces more absolute dollar gain than the year before.

The table below shows three investors, each saving $500/month and earning 7%/year, but starting at different ages and retiring at 67:

Starting at 25 versus 35 — investing for just 10 additional years at the beginning — nearly doubles the final balance: $1,746,000 versus $882,000. The 25-year-old invested only $60,000 more but ends up with $864,000 more. That is the compounding effect of time in its starkest form.

Starting at 45 produces a respectable $398,000 on $132,000 invested — but is far short of the $60,000/year retirement income goal requiring $1,500,000. The implication is not despair: it is action. Increasing contributions, planning a later retirement age, or accepting a more modest income in retirement can all bring the numbers into range. Use our calculator to explore these trade-offs directly.

Social Security's Role in Retirement

Social Security is the most reliable income source most Americans will have in retirement — it is inflation-adjusted, guaranteed for life, and immune to market risk. Despite concerns about long-term solvency, the Social Security Administration projects it can pay approximately 77% of scheduled benefits through 2035 and beyond even under its most pessimistic projections, with legislative fixes likely over time.

The average Social Security benefit in 2025 is approximately $1,920 per month ($23,040/year). For someone with above-average earnings, the benefit can exceed $3,000/month at full retirement age (67 for those born after 1960). Claiming at 62 reduces your benefit by up to 30%, while delaying to age 70 increases it by 8% per year past full retirement age — a total increase of 24% for those who wait.

The decision of when to claim Social Security is one of the most consequential in retirement planning. If you are in good health and have other income sources to bridge the gap, delaying to 70 is often the superior choice. If you have health concerns or pressing income needs, claiming earlier may be appropriate. Our calculator lets you model both scenarios by adjusting the monthly benefit amount.

To find your personalized estimate, visit ssa.gov/myaccount to create a free account. Your benefit estimate is based on your actual earnings history, so it will be far more accurate than any generic benchmark.

Inflation: Why $60,000 Today ≠ $60,000 in 30 Years

Inflation is the silent tax on retirement savings. At 3% annual inflation — the Federal Reserve's long-run historical average — purchasing power halves every 24 years. This means $60,000 in today's dollars requires approximately $97,000 in 15 years and $145,000 in 30 years to buy the same goods and services.

This has two critical implications for retirement planning. First, your nominal savings target must be larger than it looks in today's dollars — the calculator shows you the inflation-adjusted target in future dollar terms. Second, your retirement income needs to grow over time, which is why the 4% rule adjusts withdrawals annually for inflation, and why Social Security benefits include an annual Cost-of-Living Adjustment (COLA).

The most effective hedge against inflation in a retirement portfolio is continued equity exposure. The S&P 500 has historically returned approximately 6%–7% in real (inflation-adjusted) terms. Shifting too aggressively to bonds near or in retirement to “reduce risk” can paradoxically increase the risk of your portfolio failing to keep pace with inflation over a 25–30 year retirement horizon.

Common Retirement Mistakes to Avoid

Cashing out a 401(k) when changing jobs. Early withdrawal (before age 59½) triggers a 10% penalty plus ordinary income tax — a combined hit of 30%–40% for most people. On a $50,000 balance, that is $15,000–$20,000 lost instantly. Always roll over retirement accounts directly to an IRA or a new employer's plan.

Ignoring employer matching. A 401(k) employer match is an immediate 50%–100% return on your contribution, risk-free. Not contributing enough to capture the full match is one of the most costly financial mistakes in personal finance. Always contribute at least enough to get the full employer match before directing money anywhere else.

Being too conservative too early. Holding too much in bonds or cash at age 35 dramatically reduces long-term growth. With 30+ years until retirement, short-term volatility is largely irrelevant. A target-date fund or a high equity allocation (80%–90% stocks) is appropriate for most investors decades from retirement.

Underestimating healthcare costs. Fidelity estimates that a 65-year-old couple retiring today will need approximately $315,000 in savings to cover healthcare costs throughout retirement, beyond Medicare coverage. This is not included in most retirement income estimates. A Health Savings Account (HSA) is one of the best tools for addressing this — contributions are pre-tax, growth is tax-free, and withdrawals for qualified medical expenses are tax-free.

Not adjusting contributions as income grows. Most people save a fixed dollar amount rather than a fixed percentage of income. As your salary grows, your savings rate effectively shrinks. Targeting a consistent percentage (15% of gross income) and increasing contributions with every raise is the simplest way to stay on track without active management.

Planning for a 20-year retirement when it may be 35. Average life expectancy in the United States is approximately 79 years. But a 65-year-old today has a 25% chance of living past 90. Planning only to age 85 means a significant fraction of retirees will outlive their money. Model for at least age 90, and consider an annuity or other guaranteed income product if longevity risk is a concern.

Frequently Asked Questions

What is the 4% rule and is it still valid?

The 4% rule originates from the Trinity Study, a 1998 analysis of historical portfolio survival rates across stock and bond allocations. It found that a 4% initial withdrawal rate, adjusted annually for inflation, sustained a portfolio for 30 years across nearly all historical market conditions from 1926 to 1995. For 30-year retirements, the rule remains a widely accepted starting point. For longer retirements of 40+ years — increasingly common as life expectancy rises — researchers such as Wade Pfau suggest a 3%–3.5% rate provides more margin of safety given potentially lower future returns. The rule should be treated as a planning benchmark, not a guarantee, and reviewed with a financial advisor based on your specific circumstances.

How much should I be saving for retirement each month?

Fidelity recommends saving 15% of gross income for retirement (including any employer match) if you start at age 25. Vanguard's research suggests 12%–15% for those starting in their late 20s to early 30s. Those starting in their 40s may need to save 20%–25% to catch up. The exact amount depends on your current age and savings, desired retirement lifestyle, expected Social Security benefit, and investment return assumptions. Use the calculator above to find your personal target: enter your current savings and adjust the monthly contribution until the projected nest egg meets or exceeds your goal.

What annual return rate should I assume?

For a diversified equity portfolio, the S&P 500's historical average nominal return has been approximately 9%–10% annually since 1928. After adjusting for 3% inflation, the real return is roughly 6%–7%. For conservative planning, many financial advisors use 6%–7% nominal. For a mixed portfolio (e.g., 70% stocks, 30% bonds), 5%–6% is a reasonable assumption. Run the calculation at multiple rates — 5%, 7%, and 9% — to understand the range of outcomes. Do not use rates above 8%–9% for long-term planning; they assume above-average returns and provide false confidence.

Does Social Security count toward my retirement income?

Yes, and it can substantially reduce the savings target you need to reach. Social Security benefits average approximately $1,920/month in 2025 for retired workers. If your desired income is $60,000/year ($5,000/month) and Social Security provides $1,900/month, you only need your portfolio to generate $3,100/month — an annualized goal of $37,200, requiring approximately $930,000 under the 4% rule instead of $1,500,000. To get your personal estimate, visit ssa.gov/myaccount. Claiming Social Security at 70 instead of 62 increases your monthly benefit by up to 77% over the early claiming amount.

What if I'm starting late — is it too late to retire comfortably?

Starting in your 40s or 50s is harder than starting at 25, but far from hopeless. Several factors help late starters. Those 50 and older can make catch-up contributions of up to $7,500/year extra in a 401(k) and $1,000/year extra in an IRA (2025 limits). Delaying retirement by 2–3 years both adds compounding time and increases Social Security benefits — working until 70 instead of 67 increases Social Security by 24%. Accepting a modestly reduced retirement lifestyle or supplementing with part-time work in early retirement can also make the numbers work. Model these scenarios in the calculator to find the path that fits your specific situation.

What is a safe withdrawal rate in retirement?

The safe withdrawal rate (SWR) is the maximum percentage of a portfolio you can withdraw annually without running out of money over your planned retirement horizon. At 30 years: 4% is the historically validated rate. At 40 years: 3%–3.5% provides more safety. At 20 years: 5% may be sustainable. Variables that can support a higher SWR include: guaranteed income sources (Social Security, pension, annuity), a flexible spending plan (willing to cut back in down markets), and a portfolio with significant equity exposure. Variables that require a lower SWR include: poor health at retirement, limited flexibility in spending, or an all-bond portfolio.

How does inflation affect my retirement plan?

At 3% annual inflation, the purchasing power of $1 halves in 24 years. If you retire at 65 and live to 90, you face 25 years of inflation eroding your fixed withdrawals. A $60,000 annual withdrawal in year one must become $125,000 by year 25 just to maintain the same standard of living. This is why the 4% rule uses inflation-adjusted withdrawals, and why Social Security includes annual Cost-of-Living Adjustments. Maintain meaningful equity exposure throughout retirement to produce returns that outpace inflation over a long horizon. The historical 3% inflation rate is our default, but you can model higher scenarios (e.g., 4%–5%) in the calculator to stress-test your plan.

Should I use a Roth IRA or Traditional 401(k)?

The core question is whether you expect to be in a higher tax bracket now or in retirement. A Traditional 401(k) or IRA gives you a tax deduction now and you pay taxes on withdrawals in retirement. A Roth IRA or Roth 401(k) takes no deduction now but all qualified withdrawals — including decades of growth — are completely tax-free. Early-career workers in the 22% or lower tax bracket almost always benefit more from Roth accounts. High earners in the 32%–37% bracket typically benefit more from Traditional accounts. The optimal approach for many people is a mix of both — contributing to a Traditional 401(k) for the match and deduction, then maxing a Roth IRA for tax-free growth — creating tax diversification that allows strategic draws in retirement.

Methodology & Data Sources

This calculator uses the future value of a lump sum plus the future value of an annuity formula, computed month by month. Current savings grow at the specified monthly rate (annual rate ÷ 12), and monthly contributions are added each period and earn interest from the moment they are deposited.

The retirement savings goal is calculated using the 4% safe withdrawal rate: Goal = (Desired Annual Income − Annual Social Security) ÷ 0.04. This methodology is based on the Trinity Study (Cooley, Hubbard, Walz, 1998) and subsequent research by Bengen (1994) and Pfau (2011–2025). The inflation-adjusted target reflects what your savings goal will look like in future nominal dollars at the specified inflation rate.

Historical return figures for U.S. equities reference long-run S&P 500 total return data compiled by Robert Shiller (Yale University) and Aswath Damodaran (NYU Stern). Social Security benefit averages are sourced from the Social Security Administration's 2025 statistical supplement. All calculations assume a fixed rate of return applied consistently throughout the accumulation period. Real-world returns fluctuate annually. This calculator is provided for educational and planning purposes only and does not constitute financial advice.