Calculate how much you need to save for a comfortable retirement
This retirement planner projects your savings growth from now until retirement, factoring in compound interest, ongoing contributions, and inflation. It then calculates whether your nest egg can sustain your desired lifestyle using the 4% safe withdrawal rule.
The 4% rule (Bengen, 1994) suggests you can withdraw 4% of your portfolio in the first year of retirement, then adjust for inflation each year, with a high probability of not running out of money over a 30-year retirement. For a more conservative approach, use 3-3.5%. If you expect higher market returns or a shorter retirement, 4.5-5% may be acceptable.
Retirement planning is the process of setting income goals for retirement and mapping out the financial path to reach them. With the steady decline of traditional pensions and ongoing uncertainty around Social Security, individuals now bear more responsibility than ever for funding their own retirement. A 2024 study by the Employee Benefit Research Institute found that only about 64% of American workers feel confident they will have enough money to live comfortably in retirement — meaning roughly one in three savers is genuinely worried about outliving their money.
Life expectancy in the United States has risen dramatically over the past century. A 65-year-old today can expect to live roughly another 19 years on average, and a meaningful share will live into their 90s. Planning for a 30-year retirement is now the prudent baseline rather than an overly conservative assumption. This extended lifespan means your savings must stretch further and withstand more years of inflation, market volatility, and healthcare spending than previous generations faced.
The retirement income gap is the shortfall between what you’ll need in retirement and what you’ll actually have from guaranteed sources. Many workers underestimate this gap. Consider a household earning $80,000 per year that wants to replace 70–80% of pre-retirement income, or $56,000–$64,000 annually. If Social Security provides roughly $30,000 and a pension adds $10,000, the remaining $16,000–$24,000 must come from personal savings — requiring a nest egg of $400,000 to $600,000 at a 4% withdrawal rate. Identifying this gap early is the first step toward closing it.
Our retirement planner uses established financial mathematics to project your future savings and test whether they will meet your needs. The methodology is transparent and built on three core calculations that work together to give you a realistic picture of retirement readiness.
The calculator projects your savings using the future value of a growing annuity formula. Your current savings grow at the annual return rate you specify, while your monthly contributions compound monthly. For example, $50,000 in current savings growing at 7% for 35 years becomes roughly $533,000 on its own, and adding $1,000 per month pushes the total to approximately $1.86 million. The formula compounds contributions monthly to match how most people actually save through payroll deduction or automatic transfers.
Inflation silently erodes purchasing power, and ignoring it is one of the most dangerous mistakes in retirement planning. The calculator adjusts your desired monthly income from today’s dollars to future dollars using the inflation rate you enter. At 3% annual inflation, $5,000 in today’s money equals about $14,027 in 35 years. This is why the calculator asks for your desired income in today’s dollars — it performs the inflation math for you so the target stays meaningful across decades.
Once you reach retirement, the calculator applies your chosen safe withdrawal rate (defaulting to 4%) to determine how much income your nest egg can generate. If you project $1.5 million in savings at 4%, that’s $60,000 per year or $5,000 per month. The slider lets you test 3% (very conservative) up to 6% (aggressive) so you can see how this single assumption changes your required savings target. Small changes in the withdrawal rate produce large swings in the nest egg you need.
The 4% rule is one of the most widely cited guidelines in retirement planning, but its origins and limitations are often misunderstood. Understanding where it comes from helps you decide whether to follow it, adjust it, or abandon it for a more personalized approach.
The rule traces back to financial advisor William Bengen, who published research in 1994 demonstrating that a portfolio of roughly 50% stocks and 50% bonds could sustain 4% inflation-adjusted withdrawals for at least 30 years in nearly every historical scenario dating back to 1926. Three professors from Trinity University later reinforced these findings in a 1998 study that tested a range of stock/bond allocations and withdrawal rates across decades of market data — which is why the research is often called the “Trinity Study.” The conclusion: withdrawing 4% of your initial balance, then adjusting that dollar amount for inflation each year, had a high probability of lasting through a 30-year retirement.
If you retire with $1,000,000, you withdraw $40,000 in year one. In year two, regardless of market performance, you withdraw $40,000 adjusted for inflation — say $41,200 at 3% inflation. The key insight is that the dollar amount is set in year one and only changes with inflation, not with portfolio value. This smooths your income and forces discipline during market downturns, when selling more shares to maintain spending can permanently damage your portfolio.
The 4% rule has faced scrutiny in recent years. Critics point out that the original research assumed historical U.S. market returns and bond yields that may not repeat in a lower-yield environment. Sequence-of-returns risk — retiring just before a major market crash — can dramatically shorten portfolio longevity even if long-term averages look fine. Today’s lower bond yields, longer life expectancies, and elevated stock valuations lead many planners to recommend 3–3.5% as a safer starting point. The rule also ignores taxes, investment fees, and the empirical reality that retiree spending often declines in later years.
For a 30-year retirement with a balanced portfolio, 4% remains a reasonable planning baseline. If you expect to retire early with a 40+ year horizon, lean toward 3–3.5%. If you have a shorter retirement (15–20 years) or are willing to adjust spending with market conditions, 4.5–5% may work. Use the withdrawal rate slider in the calculator above to see how this single assumption shifts your required nest egg — moving from 4% to 3.5% increases your target savings by roughly 14%.
Where you save matters as much as how much you save. Tax-advantaged accounts can add tens of thousands of dollars in value through decades of tax-deferred or tax-free growth. Understanding the contribution limits and tax treatment of each account type helps you build an efficient savings strategy.
Employer-sponsored 401(k) plans allow pre-tax contributions up to $23,000 in 2024 ($30,500 if you’re 50 or older thanks to catch-up contributions). Many employers match contributions — often 50% of your contribution up to 6% of salary — which is essentially free money. A 6% match on a $75,000 salary adds $4,500 per year to your retirement at no cost to you. Always contribute at least enough to capture the full employer match; failing to do so is leaving compensation on the table.
A Traditional IRA lets you contribute pre-tax dollars (up to $7,000 in 2024, or $8,000 if 50+) and earnings grow tax-deferred until withdrawal in retirement. Deduction limits phase out for higher earners who are covered by a workplace plan, but the tax-deferred growth is valuable for anyone with earned income. Traditional IRAs are also a good home for rolling over an old 401(k) when you change jobs.
With a Roth IRA, you contribute after-tax dollars but qualified withdrawals in retirement are completely tax-free. The 2024 contribution limit is $7,000 ($8,000 if 50+), with income phase-outs starting at $146,000 for single filers. A Roth is especially powerful for younger savers who expect higher tax brackets in retirement, and it offers flexibility since contributions (not earnings) can be withdrawn anytime penalty-free. Having both pre-tax and Roth assets in retirement gives you valuable tax diversification.
Traditional pensions provide guaranteed lifetime income based on salary and years of service, but they’re increasingly rare outside government and union jobs. Social Security replaces about 40% of pre-retirement income for average earners, with the average monthly benefit around $1,900 in 2026. Together, these guaranteed income sources reduce how much you need to withdraw from personal savings — a retiree with $2,500/month from Social Security and a $1,500/month pension needs far less investment income than someone relying entirely on their portfolio.
After maxing out tax-advantaged accounts, a taxable brokerage account offers unlimited contributions with no withdrawal restrictions or required minimum distributions. Long-term capital gains (on assets held over one year) are taxed at preferential rates of 0%, 15%, or 20%, making taxable accounts surprisingly efficient for buy-and-hold investors. For high earners who have filled their tax-advantaged space, taxable accounts are essential for reaching ambitious retirement targets.
The “magic number” for retirement varies dramatically by individual, but several well-tested frameworks help you estimate your target. Rather than picking a round number like $1 million, use these approaches to ground your goal in your actual lifestyle and circumstances.
The simplest guideline: multiply your annual retirement expenses by 25. If you need $60,000 per year, your target is $1.5 million. This derives directly from the 4% rule (1 ÷ 0.04 = 25). For $80,000 in annual spending, you’d need $2 million. The rule assumes a 30-year retirement and a diversified portfolio, so adjust upward for early retirees or downward if you have significant guaranteed income from a pension or Social Security.
Financial planners often target a replacement rate of 70–80% of pre-retirement income. A household earning $100,000 might aim for $70,000–$80,000 in retirement income. The logic: you’ll no longer pay payroll taxes, save for retirement, or commute, and your tax rate may drop. However, healthcare and travel spending often rise in early retirement, so don’t assume your expenses will automatically fall — many retirees spend just as much in their first decade of retirement as they did while working.
Social Security is the backbone of most Americans’ retirement income, yet many don’t understand how it’s calculated or how to maximize it. Making informed decisions about when and how to claim can add tens of thousands of dollars to your lifetime benefits.
Your Social Security benefit is based on your 35 highest-earning years, indexed for wage growth. The Social Security Administration computes your Average Indexed Monthly Earnings (AIME) and applies a progressive formula that replaces 90% of your first ~$1,174 in monthly earnings, 32% of earnings up to ~$7,078, and 15% above that. The result is your Primary Insurance Amount (PIA) — the benefit you receive at full retirement age. A worker with a 35-year history of maximum taxable earnings would receive roughly $3,800/month in 2026, while the average beneficiary receives about $1,900.
Full Retirement Age (FRA) is 67 for anyone born in 1960 or later. Claiming before FRA permanently reduces your benefit — by as much as 30% if you claim at 62. Claiming after FRA increases your benefit by 8% per year up to age 70. For someone with a $2,000 FRA benefit, claiming at 62 means ~$1,400/month, while waiting until 70 yields ~$2,480/month. That’s a difference of more than $1,000 every month for the rest of your life.
Claiming at 62 gets you checks sooner but at a reduced rate for life. Waiting until 70 maximizes your monthly benefit. The break-even age — the point at which delaying starts to pay off cumulatively — is typically around 80–82, meaning if you expect to live past your early 80s, delaying tends to win. Married couples can use sophisticated strategies: one spouse claiming early while the other delays can provide income now and a larger survivor benefit later, since the surviving spouse inherits the larger of the two benefits. The calculator above does not include Social Security, so subtract your estimated benefit from your “desired monthly income” to model its impact on your savings target.
Even diligent savers can derail their retirement with avoidable errors. Recognizing these pitfalls before they damage your plan can save you years of catch-up work and significant money.
Time is the most powerful factor in retirement savings due to compound interest. A 25-year-old saving $500/month at 7% will accumulate about $1.2 million by age 65. A 35-year-old saving the same amount will have only about $567,000 — waiting just 10 years cuts your final balance nearly in half, even though you contributed the same amount each month. Starting early, even with small amounts, beats waiting until you can contribute more. The math of compound growth rewards time far more than it rewards dollar amount.
Healthcare is one of the largest expenses in retirement and often the most underestimated. A 65-year-old couple retiring in 2024 can expect to spend roughly $315,000 on healthcare throughout retirement, according to Fidelity — and that excludes long-term care, which averages $100,000+ per year for a private nursing home room. Medicare doesn’t cover everything: premiums, deductibles, dental, vision, hearing, and long-term care all come out of pocket. Budget aggressively for healthcare or consider long-term care insurance while you’re still healthy enough to qualify at reasonable rates.
At 3% inflation, prices double every 24 years. A retiree living on $50,000 at age 65 will need about $67,000 at age 75 and $90,000 at age 85 just to maintain the same purchasing power. Many retirement plans fail because they calculate in nominal dollars instead of real dollars. Always ensure your investment returns outpace inflation — a portfolio returning 7% with 3% inflation provides a real return of only about 4%, and cash earning 1% is actually losing 2% per year in purchasing power.
Fear of market downturns leads some retirees to hold too much cash or bonds, which can be just as dangerous over a 30-year retirement as holding too many stocks. A portfolio of only Treasury bonds yielding 4% may feel safe, but after inflation and taxes it barely grows — and may not last. Historically, a 60% stock / 40% bond portfolio has provided around 7% average annual returns and survived most 30-year retirement periods. Adjusting your allocation toward stocks in early retirement and gradually increasing bonds as you age can balance growth and safety more effectively than an overly conservative stance from day one.