Retirement Nest Egg Calculator How much you need to retire, whether you are on track, and how long your savings will last
Enter your age, savings, contributions and the lifestyle you want in retirement. The calculator works out the nest egg you need after Social Security and pensions, projects what you will actually have, shows any gap and the monthly savings that closes it, and tells you the age your money could run out.
Built on the Trinity Study withdrawal research, Social Security Administration benefit rules and life expectancy data, and inflation figures from the Bureau of Labor Statistics.
Your retirement plan
Use today’s money for spending and income. Results update as you type.
You and your timeline
Savings today
Retirement lifestyle
Calculating
$0
Calculating.
Where your retirement income comes from
Yearly income in today’s money.
Your nest egg over your lifetime
Balance in today’s money, saving until retirement and withdrawing after.
Your nest egg target by method
Different planning methods, same spending.
What would improve your retirement
Each change tested on its own against your plan.
Your retirement savings, age by age
Every fifth year shown.
Insights for your retirement
What the numbers are telling you.
Key takeaways
- Your nest egg only needs to cover the spending that Social Security and pensions do not.
- With the 4% rule, multiply that yearly gap by 25. A $40,000 gap needs about $1 million.
- A $1 million nest egg withdrawing $40,000 a year, rising with inflation, lasts about 34 years at a 2% real return.
- Starting at 25, about $405 a month at 7% grows to $1 million by 65. Starting at 45 takes about $1,970.
- Plan for your money to last into your 90s, and always compare results in today’s money.
What is a retirement nest egg?
A retirement nest egg is the money you save and invest to support yourself after you stop working, usually held in accounts such as a 401(k), IRA, pension or brokerage account. Your target nest egg is the amount large enough to cover the gap between your retirement spending and guaranteed income like Social Security for the rest of your life.
Most retirement calculators answer one narrow question. This one answers the three that matter: how much you need, whether your current savings plan gets you there, and how long the money will last once you start withdrawing it. It does all three in today’s money, so a target of $800,000 means $800,000 of today’s buying power rather than an inflated future number that is hard to relate to.
How much do I need to retire?
Start with what you expect to spend each year in retirement, then subtract the income you will receive regardless of markets, such as Social Security, a pension or an annuity. The remainder is what your savings must provide. Multiply it by 25 for the 4% rule, or let the calculator size it precisely to the age you want the money to last.
| Yearly gap savings must cover | 4% rule (25×) | 3.5% rule (28.6×) | Last 25 years | Last 30 years |
|---|---|---|---|---|
| $20,000 | $500,000 | $571,429 | $394,686 | $452,767 |
| $30,000 | $750,000 | $857,143 | $592,030 | $679,150 |
| $40,000 | $1,000,000 | $1,142,857 | $789,373 | $905,534 |
| $50,000 | $1,250,000 | $1,428,571 | $986,716 | $1,131,917 |
| $60,000 | $1,500,000 | $1,714,286 | $1,184,059 | $1,358,301 |
The last two columns assume a steady 2% return above inflation and withdrawals that rise with inflation, ending at zero after 25 or 30 years. All figures are in today’s money.
How to use this retirement nest egg calculator
- Choose a mode. Use Am I on track? while you are still saving, or How long will it last? if you are retired or close to it.
- Enter your ages. Add your current age, the age you want to retire, and the age your money should last until.
- Add your savings. Include 401(k), 403(b), IRA, Roth and taxable investment accounts, plus your monthly savings and employer match.
- Describe your retirement. Enter yearly spending and your expected Social Security and pension income, both in today’s money.
- Review the gap. If you are short, the calculator shows exactly how much more to save each month, plus the effect of retiring later or spending less.
Retirement nest egg formulas
Yearly gap = retirement spending − Social Security − pensions
4% rule nest egg = yearly gap × 25Or divide by any withdrawal rate: gap ÷ 0.035 for 3.5%
Plan-age nest egg = W × [1 − (1 + i)−N] ÷ i × (1 + i)W = monthly gap, i = monthly real return, N = months from retirement to plan age
Real return = (1 + return) ÷ (1 + inflation) − 1
To project what you will have, the calculator grows your current savings month by month at your pre-retirement return, adds your monthly savings, raises them each year by the percentage you set, and converts the result to today’s money. After retirement, it withdraws your monthly gap at the start of each month, increasing it with inflation, until the money runs out or you reach your plan age.
The 4% rule vs. planning to a specific age
The 4% rule comes from William Bengen’s 1994 research and the 1998 Trinity Study. Both tested historical U.S. market returns and found that withdrawing 4% of a balanced portfolio in the first year, then raising the amount with inflation, survived almost every 30-year period on record, including the Great Depression and the 1970s.
Because it is built to survive the worst historical markets, the 4% rule usually gives a larger target than a plan that assumes steady average returns. The plan-age method is more personal, since it uses your own life expectancy and return assumptions, but it depends on those returns actually showing up. The calculator lets you switch between them so you can see the range. If both say you are on track, you are in a strong position. If only the plan-age method does, consider building a buffer.
How long will $500,000 or $1 million last in retirement?
These figures assume withdrawals rise with inflation each year and the portfolio earns 2% above inflation, which is roughly a 5% return with 3% inflation.
| Nest egg | Yearly withdrawal | Withdrawal rate | Money lasts |
|---|---|---|---|
| $500,000 | $25,000 | 5% | 25.4 years |
| $500,000 | $30,000 | 6% | 20.2 years |
| $500,000 | $40,000 | 8% | 14.3 years |
| $1,000,000 | $40,000 | 4% | 34.5 years |
| $1,000,000 | $50,000 | 5% | 25.4 years |
| $1,000,000 | $60,000 | 6% | 20.2 years |
Notice how quickly the timeline shortens once the withdrawal rate moves above 5%. Use How long will it last? to test your own balance, and the calculator will also tell you the largest monthly withdrawal that lasts to your plan age.
Retirement savings by age: are you on track?
Fidelity’s widely used savings guideline suggests aiming for a multiple of your salary at each age, assuming you save around 15% of income from age 25 and retire at 67.
| Age | Savings target | On a $75,000 salary |
|---|---|---|
| 30 | 1× salary | $75,000 |
| 40 | 3× salary | $225,000 |
| 50 | 6× salary | $450,000 |
| 60 | 8× salary | $600,000 |
| 67 | 10× salary | $750,000 |
Benchmarks like these are a useful sense check, but they cannot reflect your actual spending, pension or retirement age. The calculator above replaces the rule of thumb with your own numbers.
How much to save each month to reach $1 million by 65
Starting from zero and earning 7% a year, here is the monthly saving needed to reach $1 million by age 65. The figures are in future dollars, before inflation.
| Start saving at | Years of saving | Monthly saving needed |
|---|---|---|
| Age 25 | 40 | $405 |
| Age 35 | 30 | $855 |
| Age 45 | 20 | $1,970 |
| Age 55 | 10 | $5,846 |
Every 10 years of delay roughly doubles the monthly amount required. That is compound growth at work, and our Compound Interest Calculator shows the same effect for any savings goal.
How Social Security affects your nest egg
Social Security can shrink the nest egg you need dramatically. Every $1,000 a month of benefits removes $12,000 a year from your gap, or about $300,000 from a 4% rule target. When you claim matters too. For people born in 1960 or later, full retirement age is 67. Claiming at 62 permanently reduces your benefit by about 30%, while waiting past full retirement age adds delayed retirement credits of 8% a year up to age 70, according to the Social Security Administration.
Your personal estimate is available through a free my Social Security account. Enter it in today’s money, since the calculator keeps everything in current dollars.
Risks that can shrink a nest egg
Living longer than expected
Many 65-year-olds today will live into their 90s. The SSA’s life expectancy calculator gives a personal estimate, but planning to 95 is a sensible default for most people, especially couples.
Inflation
At 3% inflation, prices roughly double in 24 years. A fixed income that feels comfortable at 67 can feel tight at 90, which is why this calculator assumes withdrawals rise with inflation.
Sequence of returns
A market crash in the first few years of retirement does far more damage than the same crash later, because you are selling investments while prices are low. A cash reserve of one to two years of spending and flexible withdrawals help protect against it.
Healthcare and taxes
Medical costs tend to rise faster than general inflation, and withdrawals from traditional 401(k)s and IRAs are taxed as income. Build both into your spending figure.
How to grow your retirement nest egg faster
- Capture the full employer match. It is an instant return on every dollar you contribute.
- Raise contributions with every pay rise. The yearly increase field shows how much this adds over a career.
- Use catch-up contributions after 50. The IRS allows extra 401(k) and IRA catch-up contributions once you turn 50.
- Keep fees low. A 1% fee can cost six figures over a career. The Investment Return (ROI) Calculator shows the exact cost for your plan.
- Reinvest dividends. The DRIP Calculator shows how reinvested dividends add shares and future income.
- Work a little longer, or a little less. Retiring two years later adds two years of saving and growth and removes two years of withdrawals. Part-time income in early retirement has a similar effect.
If you want to retire well before 65, the FIRE Calculator is built for early retirement timelines, including Coast FIRE and Barista FIRE.
Worked example using the default inputs
A 35-year-old has $50,000 saved, sets aside $700 a month and raises that by 2% each year, earning 7% before retirement. They plan to retire at 67, spend $60,000 a year in today’s money, receive $2,200 a month from Social Security, earn 5% in retirement with 3% inflation, and want the money to last until 95.
- Yearly gap savings must cover: $60,000 − $26,400 = $33,600
- Nest egg needed to last to 95: about $728,000 in today’s money
- Projected savings at 67: about $1.62 million in future dollars, or $629,000 in today’s money
- Funded: about 86%, a shortfall of roughly $99,000
- At the current pace, money lasts until: about age 90
- To close the gap: save about $151 more a month, rising 2% a year
How I verified this calculator
The savings projection was checked against standard monthly future value formulas, and the plan-age target against the present value of an inflation-adjusted annuity due, both calculated independently in a spreadsheet. The withdrawal simulation was confirmed by running the target balance forward: it reaches zero exactly at the plan age. All tables on this page come from the same engine that powers the tool, so the article and calculator always agree.
Common retirement planning mistakes
Mixing today’s money with future dollars
A $1.6 million projection sounds like plenty until you realize it buys what about $630,000 buys today. Compare like with like, which is why this calculator shows both.
Assuming spending drops sharply
Commuting and work costs fall, but travel, hobbies and healthcare often rise. Base retirement spending on a realistic budget rather than a large automatic cut.
Planning only to average life expectancy
Average means roughly half of people live longer. Running out of money at 85 is a far worse outcome than leaving some behind.
Using optimistic returns in retirement
Most retirees hold more bonds and cash than they did while working, so their expected return falls. Use a lower return after retirement than before.
Related investment and wealth building calculators
Your nest egg connects to every other part of your financial plan. Explore these tools or browse the full finance calculators hub.
Retirement nest egg FAQs
Subtract your expected Social Security and pension income from your yearly retirement spending, then multiply the remainder by 25 using the 4% rule. If you need $40,000 a year from savings, aim for about $1 million. A more conservative 3.5% rule raises that to about $1.14 million.
Withdrawing $40,000 a year, rising with inflation, $1 million lasts about 34 years if it earns 2% above inflation. At $50,000 a year it lasts about 25 years, and at $60,000 about 20 years.
At $25,000 a year, rising with inflation and earning 2% above inflation, $500,000 lasts about 25 years. At $30,000 a year it lasts about 20 years, and at $40,000 about 14 years.
The 4% rule says you can withdraw 4% of your savings in your first year of retirement and increase that amount with inflation each year, with a high chance your money lasts 30 years. It comes from Bengen’s 1994 research and the 1998 Trinity Study.
A common guideline from Fidelity is 1 times your salary by 30, 3 times by 40, 6 times by 50, 8 times by 60, and 10 times by 67. Your own target depends on your spending and other income.
Many planners suggest 15% of income including any employer match. To reach $1 million by 65 at 7%, you need about $405 a month starting at 25, $855 at 35, or $1,970 at 45. Enter your numbers above for a personal figure.
Yes. Social Security reduces the amount your savings must provide. Every $1,000 a month in benefits cuts about $300,000 from a 4% rule nest egg target. Use your estimate from ssa.gov in today’s money.
A stock-heavy portfolio is often modeled at 6% to 8% before retirement. After retirement most people hold more bonds and cash, so 4% to 6% is more typical. Always test a cautious case.
A common starting estimate is 70% to 80% of your pre-retirement income. Your real figure depends on housing costs, health, travel plans and whether debts are paid off.
Planning to 90 or 95 is sensible for most people. Many 65-year-olds today will live past 90, and running short late in life is much harder to fix than ending with money left over.
Increase contributions, capture your full employer match, use catch-up contributions after 50, keep investment fees low, and consider retiring a year or two later. The calculator shows how much each of these changes your result.
No. It is an educational planning tool that uses constant return and inflation assumptions. Speak with a licensed financial adviser before making retirement decisions.
Manzoor Ahmad
Manzoor builds and tests every calculator on DexoCalc by checking its formulas against published sources and hand-worked examples. This retirement nest egg calculator was verified against standard future value and inflation-adjusted annuity formulas, the Trinity Study withdrawal framework and Social Security Administration guidance. Read more about Manzoor.
Sources and references
- Cooley, Hubbard and Walz, “Retirement Savings: Choosing a Withdrawal Rate That Is Sustainable” (Trinity Study), AAII Journal.
- Social Security Administration, Retirement benefits by claiming age.
- Social Security Administration, Life expectancy calculator.
- Internal Revenue Service, 401(k) contribution limits.
- Fidelity Investments, How much do I need to retire?
- U.S. Securities and Exchange Commission, Investor.gov compound interest calculator.
- U.S. Bureau of Labor Statistics, Consumer Price Index.
This retirement nest egg calculator provides estimates for education and planning. It assumes constant returns and inflation, monthly savings, and inflation-adjusted withdrawals at the start of each month. Real markets vary, and taxes are not modeled separately. It is not financial, tax or legal advice.