Retirement Calculator
How to Use This Calculator
Fill in three groups of inputs. Your Information covers your current age, when you want to retire, and how long you expect to live — plan conservatively here, since running out of money at 88 is worse than having a surplus at 95.
Savings & Contributions captures where you stand today. Include the combined balances of your 401(k), Roth IRA, Traditional IRA, and any other retirement accounts. For monthly contributions, include your employer match — it’s free money that compounds alongside yours.
Returns & Spending is where the real planning happens. A 7% pre-retirement return reflects the historical inflation-adjusted stock market average. In retirement, most people shift toward more conservative asset allocations, so a 4–5% return is more realistic. Enter your desired monthly spending in today’s dollars — the calculator adjusts for inflation automatically.
Understanding Your Results
The Retirement Readiness gauge shows the ratio between what you’ll have and what you’ll need. At 100%+, your savings are projected to cover your entire retirement. Below 100%, you’ll need to close the gap by saving more, working longer, or spending less.
The Savings Depleted at Age stat is arguably the most important number on the page. If it says “Never” — you’re in good shape. If it shows an age, that’s when you’d run out of money under current projections. Use that as motivation to adjust your inputs until it disappears.
The Effective Withdrawal Rate shows what percentage of your nest egg you’d spend in the first year of retirement. The widely-cited 4% rule suggests that withdrawing 4% of your portfolio in year one (and adjusting for inflation each year after) gives you a high probability of not running out of money over 30 years. If your withdrawal rate is much higher than 4–5%, your plan carries more risk.
How Much Do You Need to Retire?
There’s no single magic number. But here are useful benchmarks based on your desired annual spending:
| Monthly Spending (Today’s $) | Annual Spending | Nest Egg Needed (4% Rule) | Nest Egg Needed (3.5% Rule) |
|---|---|---|---|
| $3,000 | $36,000 | $900,000 | $1,029,000 |
| $4,000 | $48,000 | $1,200,000 | $1,371,000 |
| $5,000 | $60,000 | $1,500,000 | $1,714,000 |
| $7,000 | $84,000 | $2,100,000 | $2,400,000 |
| $10,000 | $120,000 | $3,000,000 | $3,429,000 |
These figures assume no Social Security or pension income. If you expect $1,500/month from Social Security, subtract $18,000/year from your spending need before calculating.
The Power of Starting Early
Time is the single most powerful variable in retirement planning — even more than return rate or contribution amount. Here’s what happens when two people both invest $500/month at 7% until age 65:
| Start Age | Years Saving | Total Contributed | Balance at 65 | Interest Earned |
|---|---|---|---|---|
| 25 | 40 | $240,000 | $1,320,000 | $1,080,000 |
| 30 | 35 | $210,000 | $895,000 | $685,000 |
| 35 | 30 | $180,000 | $601,000 | $421,000 |
| 40 | 25 | $150,000 | $395,000 | $245,000 |
| 45 | 20 | $120,000 | $253,000 | $133,000 |
Starting at 25 instead of 35 means contributing just $60K more — but ending up with $719K more. That’s compound interest at work. For a visual demonstration, try our Compound Interest Calculator.
Retirement Account Types at a Glance
Where you save matters almost as much as how much. Each account type has different tax treatment, contribution limits, and withdrawal rules. Here’s a quick comparison (see our Retirement Accounts Cheat Sheet for full details):
| Account | Tax Treatment | Best For |
|---|---|---|
| 401(k) | Pre-tax contributions, taxed on withdrawal | Maximizing employer match, high earners |
| Roth IRA | After-tax contributions, tax-free growth & withdrawal | Young earners, expecting higher future tax rates |
| Traditional IRA | Pre-tax (if eligible), taxed on withdrawal | Tax deduction now, moderate earners |
| 403(b) | Same as 401(k) | Teachers, non-profit employees |
Always capture the full employer match in your 401(k) before contributing to IRAs. If your employer matches 50% up to 6% of your salary, that’s an instant 50% return on those dollars — no investment in the world beats that.
After maxing the match, consider a Roth IRA for tax-free growth, especially if you’re early in your career and in a lower tax bracket. For a detailed comparison, see Roth vs. Traditional IRA.
Common Retirement Planning Mistakes
Underestimating healthcare costs. Medicare doesn’t cover everything. The average retired couple spends roughly $315,000 on healthcare throughout retirement. Budget for it.
Ignoring inflation. At 3% inflation, $4,000/month today is equivalent to $7,200/month in 20 years. This calculator adjusts for inflation — but many back-of-envelope calculations don’t.
Withdrawing too much, too early. Taking 6–7% annually dramatically increases the chance of running out of money. Stick close to the 4% rule, especially in the first decade of retirement.
Not accounting for sequence-of-returns risk. A market crash in your first few years of retirement is far more damaging than one in your 50s. This is why many advisors recommend a 1–2 year cash reserve at the start of retirement.
Related Tools
| Tool | Best For |
|---|---|
| Compound Interest Calculator | Visualizing how compounding grows your savings |
| Savings Goal Calculator | Finding how much to save monthly to hit a target |
| Inflation Calculator | Seeing what your money will be worth in future dollars |
| Asset Allocation Calculator | Building the right mix of stocks, bonds, cash |
| Social Security Estimator | Projecting your Social Security benefits |
| RMD Calculator | Calculating required minimum distributions |
| Tax Bracket Calculator | Estimating your effective tax rate in retirement |
Frequently Asked Questions
How much do I need to save for retirement?
A common rule of thumb is 25× your annual spending (based on the 4% withdrawal rule). If you plan to spend $50,000/year in retirement, you’d target a nest egg of about $1.25 million. But the real answer depends on your age, expected Social Security income, inflation, and how conservatively you want to plan.
What is the 4% rule?
The 4% rule says you can withdraw 4% of your portfolio in the first year of retirement, then adjust that amount for inflation each year, and have a high probability (~95%) of not running out of money over 30 years. It comes from the 1994 Trinity Study and assumes a balanced stock/bond portfolio. For more on withdrawal strategies, see our guide.
Does this calculator include Social Security?
Yes. Enter your expected monthly Social Security benefit in the “Other Monthly Retirement Income” field. The calculator subtracts this from your spending need before calculating how much your portfolio needs to cover. For a more detailed estimate of your benefit, visit our Social Security Estimator or check our Social Security guide.
What rate of return should I assume?
For pre-retirement (mostly stocks), 7% is a reasonable inflation-adjusted estimate based on historical S&P 500 returns. For post-retirement (more conservative allocation), 4–5% is typical. If you want to be conservative, use lower numbers — it’s better to be pleasantly surprised than caught short.
Should I use pre-tax or post-tax numbers?
This calculator works in pre-tax terms for simplicity. If most of your savings are in tax-deferred accounts (401(k), Traditional IRA), remember that withdrawals will be taxed as income. As a rough adjustment, you can increase your desired spending by 15–25% to account for taxes.
What if I want to retire early?
Early retirement (before 59½) requires careful planning around withdrawal rules and penalties. Roth IRA contributions can be withdrawn anytime, and Rule 72(t) allows penalty-free withdrawals from IRAs via substantially equal periodic payments. The FIRE movement guide covers strategies for early retirement in detail.
How does inflation affect my retirement plan?
Inflation erodes purchasing power over time. At 3% annual inflation, you’ll need roughly double the income in 24 years to maintain the same lifestyle. This calculator adjusts your spending upward each year automatically. You can also use our Inflation Calculator to see the impact on specific amounts.
Can I rely on this calculator alone for retirement planning?
No calculator can predict the future. Markets fluctuate, inflation varies, and life throws curveballs. Use this tool to get a baseline, stress-test different scenarios (What if I save $200 more? What if returns are only 5%?), and revisit your plan annually. For complex situations — pensions, rental income, business sales, estate planning — consider working with a fee-only financial advisor.
Key Takeaways
- Start early. Ten extra years of compounding can more than double your final nest egg — even at the same contribution level.
- Target 25× annual spending as a baseline nest egg, then adjust for Social Security, pensions, and other income.
- Keep your withdrawal rate near 4% to give your portfolio the best chance of lasting 30+ years.
- Always capture the full employer match — it’s an instant return that no other investment can beat.
- Plan for inflation. What costs $4,000/month today will cost $7,200/month in 20 years at 3% inflation.
- Revisit your plan annually. Life changes, markets move, and assumptions drift — course-correct early and often.