Retirement Planner Calculator
Project your retirement savings, estimate monthly income, and find out if you're on track to retire comfortably.
How to Plan for a Comfortable Retirement
Planning for retirement is one of the most important financial tasks you'll ever undertake. The decisions you make today — how much you save, where you invest, and when you retire — will have a profound impact on your financial security for decades to come. This calculator uses well-established financial principles to project your retirement savings and help you understand whether you're on track.
The 4% Rule: Your Retirement Income Blueprint
The 4% rule is a widely used guideline for determining how much you can safely withdraw from your retirement portfolio each year without running out of money. Originally derived from the "Trinity Study" conducted in 1998, the rule suggests that if you withdraw 4% of your portfolio in the first year of retirement and adjust for inflation each subsequent year, your savings have a high probability of lasting 30 years or more.
Under this rule, to generate $60,000 per year in retirement income, you would need a portfolio of approximately $1.5 million ($60,000 ÷ 0.04). This is why this calculator uses the 4% rule to estimate sustainable monthly income — it provides a conservative yet realistic benchmark for most retirees.
Some financial planners now recommend a slightly more conservative 3.5% withdrawal rate, particularly for people who plan to retire early or expect a retirement lasting more than 30 years. You can mentally adjust the figures in this calculator by applying that lower rate to the projected balance.
Social Security: An Important but Uncertain Piece
Social Security benefits play a meaningful role in most Americans' retirement income plans, but they should not be relied upon as your sole income source. The average Social Security benefit in 2025 is approximately $1,900 per month, though your actual benefit depends on your earnings history and when you claim.
You can claim Social Security as early as age 62, but your benefit is permanently reduced by up to 30% compared to your full retirement age (FRA) benefit. Conversely, if you delay claiming until age 70, your benefit increases by approximately 8% per year beyond your FRA. This delayed crediting can add up to a 24–32% increase over your FRA benefit, making it one of the best guaranteed "investments" available to retirees in good health.
This calculator allows you to enter your estimated Social Security benefit and subtracts it from your desired income to calculate your "gap" — the portion your personal savings need to cover.
Roth vs. Traditional: Tax Strategy Matters
The choice between a Roth IRA or Roth 401(k) and a traditional pre-tax account is a crucial tax planning decision. Traditional accounts reduce your taxable income today but require you to pay ordinary income taxes on withdrawals in retirement. Roth accounts are funded with after-tax dollars, but qualified withdrawals — including all investment growth — are completely tax-free.
As a general rule of thumb: if you expect to be in a higher tax bracket in retirement than you are today, Roth contributions tend to be more advantageous. If you expect your retirement tax bracket to be lower, traditional pre-tax contributions likely make more sense. Many financial advisors recommend diversifying between both account types to provide tax flexibility in retirement.
Catch-Up Contributions After Age 50
The IRS allows workers aged 50 and older to make additional "catch-up contributions" to retirement accounts beyond the standard annual limits. In 2025, the 401(k) catch-up contribution limit is an additional $7,500 per year on top of the $23,500 standard limit, bringing the total to $31,000. For IRAs, the catch-up amount is an additional $1,000 (for a total of $8,000).
If you're behind on retirement savings, taking full advantage of catch-up contributions in your 50s and early 60s can make a substantial difference. Even a few extra years of maximum contributions, combined with compound growth, can significantly boost your retirement balance.
Sequence of Returns Risk
One of the most underappreciated risks in retirement planning is "sequence of returns risk" — the danger that poor investment returns early in retirement can devastate a portfolio even if average long-term returns are acceptable. If markets drop sharply in the first few years you're withdrawing from your portfolio, you may be forced to sell assets at low prices, leaving fewer shares to recover when markets rebound.
Strategies to mitigate sequence of returns risk include: maintaining a 1–2 year cash reserve so you don't have to sell investments during a downturn, gradually shifting to a more conservative asset allocation as you approach retirement, and considering a "bucket strategy" that separates funds into short-term, medium-term, and long-term segments with different investment approaches.
How Much Should You Be Saving?
A common rule of thumb is to save 15% of your gross income for retirement, including any employer match. If you start later in life, you may need to save a higher percentage to catch up. The calculator above will show you the required monthly contribution if there's a gap between your projected income and your desired income.
Beyond the percentage-of-income rule, it can be helpful to use "retirement savings benchmarks" by age. Fidelity suggests having 1x your salary saved by 30, 3x by 40, 6x by 50, 8x by 60, and 10x by 67. These benchmarks provide a quick gut-check for whether you're in the right ballpark.
Remember that this calculator provides projections based on assumed rates of return and inflation. Actual results will vary based on market performance, tax changes, and personal circumstances. We always recommend working with a qualified financial planner to develop a personalized retirement strategy.
If you're balancing retirement savings with education funding, our College Savings Calculator (529 Plans) can help you model both goals simultaneously and find the right contribution split.
Frequently Asked Questions
The most common guideline is to accumulate 25 times your annual retirement expenses (which is equivalent to the 4% rule). So if you need $60,000 per year in retirement, aim for a $1.5 million portfolio. However, this varies significantly based on your lifestyle, health, other income sources (like Social Security or a pension), and how long you expect to live in retirement. A personalized plan from a financial advisor can give you a more precise target.
The default of 7% represents a commonly cited historical average real return for a diversified stock portfolio over long periods (the S&P 500 has averaged roughly 10% nominal, or about 7% after inflation). A more conservative assumption might be 5–6% if you hold a mixed portfolio of stocks and bonds. Be careful not to use overly optimistic assumptions — a 1–2% difference in assumed return has a dramatic impact on projected balances over 30 years.
The 4% rule remains a useful starting point, but some financial researchers have suggested it may be too generous given current lower interest rate environments and higher market valuations. Some advisors now recommend a 3–3.5% withdrawal rate as a more conservative alternative, especially for early retirees. The rule also assumes a 30-year retirement — if you retire at 55, you may need to plan for a 40+ year retirement and should consider a lower rate. Despite its limitations, the 4% rule is still the most widely accepted retirement income benchmark.
The decision of when to claim Social Security is highly personal. Claiming at 62 gives you income sooner but permanently reduces your monthly benefit by up to 30%. Waiting until your Full Retirement Age (66–67 depending on birth year) gives you 100% of your earned benefit. Delaying until 70 increases your benefit by about 8% per year beyond FRA. If you're in good health and have other income to live on, delaying Social Security is often one of the most valuable financial moves you can make. If you have health concerns or need the income immediately, claiming earlier may make more sense.
With a traditional IRA, contributions may be tax-deductible (depending on income and whether you have a workplace plan), and you pay income taxes when you withdraw funds in retirement. With a Roth IRA, contributions are made with after-tax dollars, but qualified withdrawals — including all growth — are completely tax-free. Roth IRAs also have no required minimum distributions (RMDs) during your lifetime, giving them an advantage for estate planning. In 2025, the contribution limit is $7,000 per year ($8,000 if you're 50 or older) for both IRA types combined.
Inflation erodes the purchasing power of your savings over time. At 2.5% annual inflation, $1 today will only have the purchasing power of about $0.61 in 20 years. This is why the calculator shows an inflation-adjusted balance alongside the nominal balance — to give you a realistic sense of what your projected savings will actually buy in today's dollars. For retirement income planning, you should also plan for your expenses to rise with inflation throughout retirement, which the 4% rule accounts for by adjusting withdrawals annually.