US Retirement Planner
Plan your retirement with 401(k), IRA, employer match, and Social Security estimates
Retirement Projection
Total at Retirement
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Monthly Income (4% rule)
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Social Security (annual)
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Readiness
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Investment Growth vs Contributions
Total Investment Growth: -
Years to Retirement: -
Year-by-Year Projection
| Age | Salary | 401(k)+Match | IRA | Growth | Balance |
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How Retirement Planning Works in the US
Retirement planning in the United States revolves around three pillars: employer-sponsored plans (401(k), 403(b)), individual retirement accounts (IRA, Roth IRA), and Social Security. The ideal strategy combines all three to create a diversified income stream in retirement. The earlier you start saving, the more powerful compound growth works in your favor.
This calculator projects your retirement savings by modeling annual contributions to your 401(k) and IRA accounts, including employer matching contributions. It applies compound growth at your expected rate of return, accounts for salary increases over time, and compares your projected retirement income (using the 4% withdrawal rule plus Social Security) against your desired retirement income to assess your readiness.
The Power of Compound Growth
Compound growth is the engine that transforms modest regular contributions into substantial retirement wealth. Here is a comparison showing the dramatic impact of starting age:
| Scenario | Start Age | Monthly | Total Contributed | Balance at 65 |
|---|---|---|---|---|
| Early Saver | 25 | $500 | $240,000 | $1,199,000 |
| Mid-Career | 35 | $500 | $180,000 | $567,000 |
| Late Starter | 45 | $500 | $120,000 | $246,000 |
| Late + Double | 45 | $1,000 | $240,000 | $492,000 |
The Early Saver contributed $240,000 and ended with nearly $1.2 million — $959,000 of that is pure growth. Even the Late Starter doubling their contribution cannot match the Early Saver's result. Time in the market beats timing the market.
401(k) Contribution Strategy
The optimal 401(k) contribution strategy follows these priorities: First, contribute at least enough to capture the full employer match — this is an immediate 50-100% return on your money. Second, consider maxing out a Roth IRA ($7,000/year) for tax diversification. Third, increase 401(k) contributions toward the annual limit. The 2025 limit is $23,500, plus $7,500 catch-up for those 50 and older.
A common employer match formula is "50% match on the first 6% of salary." If you earn $80,000, contributing 6% ($4,800) earns you $2,400 in free employer money. If you only contribute 3%, you get $1,200 in match and leave $1,200 on the table. Over a 30-year career with 7% returns, that lost $1,200/year of match grows to approximately $113,000 in missed retirement savings.
Social Security: What to Expect
Social Security provides a foundation of retirement income based on your highest 35 years of earnings. The average monthly benefit in 2025 is approximately $1,900 for retired workers. Higher earners may receive up to the maximum benefit of about $4,018/month (claiming at full retirement age). You can estimate your benefit at ssa.gov/myaccount.
When to claim is one of the most important retirement decisions. Claiming at 62 reduces your benefit by about 30% permanently. Waiting until 70 increases it by 24-32% above the full retirement age benefit. For someone with a full retirement age benefit of $2,000/month: claiming at 62 gives $1,400/month, at 67 gives $2,000/month, and at 70 gives $2,480/month. Over a 20-year retirement, delaying from 62 to 70 means receiving $86,400 more total, despite fewer years of payments.
Retirement Readiness Benchmarks
Financial advisors often use age-based benchmarks to assess whether you are on track. While these are rough guidelines, they provide useful checkpoints:
- Age 30: 1x your annual salary saved
- Age 35: 2x your annual salary saved
- Age 40: 3x your annual salary saved
- Age 45: 4x your annual salary saved
- Age 50: 6x your annual salary saved
- Age 55: 7x your annual salary saved
- Age 60: 8x your annual salary saved
- Age 67: 10x your annual salary saved
If you are behind these benchmarks, do not panic. Increasing your savings rate by even 1-2% of salary, capturing the full employer match, and avoiding early withdrawals can significantly improve your trajectory over time.
Common Retirement Planning Mistakes
1. Not Starting Early Enough
As the compound growth table shows, every year of delay costs significantly more than the contributions themselves. Even $100/month starting at age 22 is worth more than $500/month starting at age 40. Open a retirement account with your first job, even if you can only contribute a small amount.
2. Leaving Employer Match on the Table
Not contributing enough to get the full employer match is equivalent to turning down a pay raise. If your employer matches 50% of up to 6% of salary, contributing less than 6% means you are leaving free money on the table. This is the highest guaranteed return you can get on any investment.
3. Cashing Out When Changing Jobs
When leaving a job, many people cash out their 401(k) instead of rolling it into an IRA or new employer's plan. Cashing out triggers income tax plus a 10% early withdrawal penalty (if under 59.5), and destroys years of compound growth. A $50,000 balance cashed out at age 35 would have grown to approximately $380,000 by age 65. Always roll over instead of cashing out.
Official Sources
FAQ
How much do I need to retire comfortably?
A common guideline is the 25x rule: multiply your desired annual retirement income by 25. If you want $60,000/year in retirement, you need approximately $1,500,000 in savings. This is based on the 4% withdrawal rule, which suggests you can safely withdraw 4% of your portfolio each year with a high probability of not running out of money over 30 years. Social Security benefits can reduce the savings needed.
What is the 4% withdrawal rule?
The 4% rule, from the Trinity Study, states that retirees can withdraw 4% of their portfolio in the first year of retirement, then adjust for inflation each subsequent year, with a 95%+ probability of the portfolio lasting at least 30 years. For a $1,000,000 portfolio, you would withdraw $40,000 in year one. Some financial advisors now suggest 3.5% as more conservative given current conditions, while others argue dynamic withdrawal strategies can safely support higher rates.
What is the maximum 401(k) contribution for 2025?
For 2025, the employee contribution limit is $23,500. If you are age 50 or older, you can contribute an additional $7,500 as a catch-up contribution, for a total of $31,000. The total limit including employer contributions is $70,000 ($77,500 with catch-up). These limits are adjusted annually for inflation. Maximizing contributions early in your career can make a dramatic difference due to compound growth.
How does employer 401(k) match work?
Employer match is free money added to your 401(k) based on your contributions. A common match is 50% of your contributions up to 6% of your salary. If you earn $80,000 and contribute 6% ($4,800), your employer adds 50% of that ($2,400). Always contribute at least enough to get the full match — not doing so leaves free money on the table. Some employers vest the match over 3-6 years, meaning you must stay employed to keep it.
What is the difference between Traditional and Roth IRA?
Traditional IRA contributions are tax-deductible now but withdrawals are taxed in retirement. Roth IRA contributions are made with after-tax dollars but withdrawals are tax-free in retirement. Choose Traditional if you expect a lower tax rate in retirement; choose Roth if you expect a higher rate or want tax-free flexibility. The 2025 contribution limit is $7,000 ($8,000 if age 50+). Roth IRA eligibility phases out at higher incomes.
When can I start collecting Social Security?
You can start as early as age 62 with reduced benefits (about 30% less than full benefit), at full retirement age (66-67 depending on birth year) for full benefits, or delay until age 70 for maximum benefits (about 24-32% more than full benefit). Each year you delay past full retirement age increases your benefit by approximately 8%. For those who can afford to wait, delaying to 70 often provides the best lifetime value.
How does compound growth affect retirement savings?
Compound growth means your investment returns earn their own returns. Starting to save $500/month at age 25 with a 7% annual return yields approximately $1,200,000 by age 65. Waiting until age 35 to start the same contributions yields only about $567,000 — less than half. The 10-year head start nearly doubles the final amount because of compound growth. This is why starting early is the single most powerful retirement strategy.
What annual investment return should I expect?
The S&P 500 has historically returned about 10% annually (7% after inflation). However, returns vary by investment type: stocks (8-10% nominal), bonds (3-5%), and money market/savings (2-4%). A balanced portfolio (60% stocks/40% bonds) has averaged about 8% nominal. For retirement planning, using 6-7% (inflation-adjusted) is a reasonable conservative assumption that accounts for fees and market variability.