Retirement Planner Calculator

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.

How Much Income Will You Need? The 70–80% Rule

A practical starting point for the "Desired Monthly Income" field is the income-replacement rule: most planners suggest you'll need roughly 70–80% of your pre-retirement income to maintain your standard of living. Expenses like commuting, payroll taxes, and retirement contributions themselves typically disappear, while healthcare and leisure spending often rise. If you earn $6,000 per month today, a reasonable first target is $4,200–$4,800 per month in retirement.

Your personal number may differ: if you plan to travel extensively or carry a mortgage into retirement, aim toward 80–100%; if your home is paid off and your lifestyle is modest, 60–70% may be sufficient. Start with the rule of thumb, then adjust the input to match your actual expected expenses.

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.

To make the claiming decision concrete, suppose your benefit at full retirement age (67 for anyone born in 1960 or later) would be $2,000 per month:

• Claim at 62: roughly $1,400/month — permanently reduced, but five extra years of checks.
• Claim at 67 (FRA): the full $2,000/month you earned.
• Claim at 70: roughly $2,480/month — about 24% more than FRA, for life, with annual cost-of-living adjustments applied to the larger base.

The break-even point between claiming early and waiting typically falls around age 78–82: if you expect to live beyond your early 80s, delaying usually pays more in total lifetime benefits. Married couples have an extra consideration — when the higher earner delays, the larger benefit also becomes the survivor benefit, protecting the surviving spouse. Claiming early can still be rational if you need the income now or have health concerns that shorten your planning horizon.

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. Not sure what your benefit will be? Our Social Security Estimator can give you a working figure.

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.

Don't Forget Healthcare and Long-Term Care Costs

Healthcare is one of the largest and most commonly underestimated retirement expenses. Fidelity's widely cited estimate puts lifetime healthcare costs for a 65-year-old retiring today at roughly $165,000 per person — and that's with Medicare, which doesn't cover everything (premiums, deductibles, dental, vision, and hearing costs remain). When setting your desired monthly income, make sure it includes a realistic health-spending line, and remember that medical costs tend to rise faster than general inflation.

Long-term care is the other planning gap: government studies estimate that a majority of people turning 65 will need some form of long-term care support during their lives, and Medicare generally does not pay for extended custodial care. Options to consider well before you need them include long-term-care insurance (premiums are far cheaper in your 50s), hybrid life/LTC policies, or simply earmarking part of your portfolio as a care reserve.

Beyond Savings: Other Retirement Income Sources

Your portfolio and Social Security don't have to carry the entire load. Many retirees layer in additional income streams: part-time or consulting work in the early retirement years (even $1,000/month of earnings reduces portfolio withdrawals by $300,000 worth of 4%-rule savings), rental income from an investment property or a spare room, pension income if you're fortunate enough to have one (enter it in the calculator above), and annuities that convert a lump sum into guaranteed lifetime income.

Each extra income stream directly shrinks the savings gap this calculator computes — that's why the pension field and Social Security field subtract from your desired income before the 4% rule is applied. If a side income is part of your plan, subtract it from the "Desired Monthly Income" input to see how much pressure it takes off your portfolio.

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