Retirement Calculator

Using the calculator is straightforward. You'll enter a handful of key inputs, and the tool does the math for you. Here's what you'll typically need to provide:

• Current age and your target retirement age
• Current retirement savings (the total balance across all your accounts right now)
• Annual income and how much you're currently saving each month or year
• Expected annual return on your investments (a common default is 6–7% for a balanced portfolio)
• Desired monthly income in retirement, which is how much you want to live on each month after you stop working
• Inflation rate assumption, often defaulted to around 2–3% per year

Once you submit your inputs, the calculator estimates your projected savings at retirement, compares it to what you'll actually need, and tells you whether you're on track or facing a shortfall. If there's a gap, it also shows you what adjustments, like saving more each month or retiring a few years later, could close it.

Don't worry about getting every number perfect. Use your best estimates to start. You can always revisit and tweak the inputs as your situation changes.

There's no single magic number that works for everyone, but a few widely used benchmarks can give you a solid starting point.

The most popular rule of thumb is the 25x rule: multiply your expected annual spending in retirement by 25. So if you plan to spend $60,000 a year, you'd need roughly $1.5 million saved. This rule ties directly to the 4% withdrawal rate, which suggests that withdrawing 4% of your portfolio in the first year of retirement (and adjusting for inflation each year after) gives your money a very high probability of lasting 30 years.

That said, your personal number depends on several factors:

• Lifestyle expectations — traveling the world costs more than staying home and gardening
• Healthcare costs, which tend to rise significantly as you age
• Whether you'll have a pension or Social Security income, which can reduce how much you need from savings
• How long you expect to be retired — retiring at 55 means your money needs to stretch further than if you retire at 67

A good approach is to estimate your expected annual expenses in retirement, subtract any guaranteed income sources like Social Security, and then apply the 25x rule to the remaining amount you'd need to pull from your portfolio. That gives you a realistic, personalized target.

Behind every retirement calculator is a set of time-value-of-money formulas. You don't need to memorize them, but understanding the basic logic helps you trust the output.

The core calculation uses compound interest. Your existing savings grow over time based on an assumed annual return, and your ongoing contributions get added to that growing balance. The formula for future value of a lump sum looks like this:

Future Value = Present Value × (1 + r)ⁿ

Where r is the annual rate of return and n is the number of years until retirement. Your regular contributions are calculated separately using the future value of an annuity formula, then added to the lump-sum projection.

Inflation adjustments are layered on top. Your target retirement income is expressed in today's dollars, but the calculator converts it to future dollars using an assumed inflation rate. This is why a $5,000 monthly budget today might actually require $8,000 or more per month 25 years from now.

The result is a projection, not a guarantee. Returns vary year to year, inflation fluctuates, and life doesn't move in a straight line. But a well-built formula gives you a reasonable, evidence-based target to aim for.

Once you know your retirement savings target, the next logical question is: how much do I need to set aside each month to actually get there?

The answer depends on three big variables: how much you've already saved, how many years you have until retirement, and what kind of return you expect on your investments. The more time you have and the more you've already saved, the less pressure you'll feel each month. Start later or start from zero, and the required monthly contribution can jump dramatically.

Here's a rough example to make it concrete. Say you're 35 years old, you want to retire at 65, you have $50,000 saved, and your goal is to accumulate $1.2 million. Assuming a 6% average annual return, you'd need to save roughly $900 to $1,000 per month to hit that target. Start at 45 with the same goal and no savings? You're looking at closer to $2,800 a month.

A few things can meaningfully reduce your required monthly savings:

• Retiring a few years later (even two or three years makes a big difference)
• Adjusting your target spending in retirement downward
• Taking on slightly more investment risk to pursue a higher return (with the trade-off of more volatility)
• Maximizing tax-advantaged accounts like a 401(k) or IRA, where tax savings effectively boost your net contribution

The calculator handles all of this math automatically. Use it to run different scenarios and find a monthly savings number that's actually achievable with your current budget.

Your retirement income will likely come from more than one place. Most Americans draw from some combination of Social Security, personal savings and investment accounts, and sometimes a pension or part-time work.

Social Security is a meaningful piece for most people. Your benefit amount is based on your 35 highest-earning years and the age at which you claim. Claiming at 62 reduces your benefit by up to 30% compared to waiting until your full retirement age (which is 67 for anyone born in 1960 or later). Waiting until 70 increases it by 8% per year beyond your full retirement age. That's a significant range, and the timing decision matters a lot over a long retirement.

You can get an estimate of your expected Social Security benefit by creating an account at ssa.gov. The calculator here lets you plug that number in directly so it's factored into your income projection.

The rest of your retirement income will come from your savings: 401(k)s, IRAs, brokerage accounts, and anything else you've built up. Using the 4% rule as a guide, a $1 million portfolio would generate about $40,000 per year, or roughly $3,333 per month, in sustainable withdrawals.

Combining your estimated Social Security benefit with your projected portfolio withdrawals gives you a total expected monthly income in retirement. Compare that to your anticipated monthly expenses, and you'll know pretty quickly whether you're set or whether there's work to do.

When you retire is one of the most powerful levers you have. It affects how long your savings need to grow, how many years your money needs to last, and when you can claim Social Security.

Most people think of 65 as the traditional retirement age, largely because of Medicare eligibility. But the Social Security full retirement age is now 67 for most current workers, and plenty of people are working well into their late 60s or beyond, either by necessity or by choice.

Retiring earlier than planned sounds appealing, but the math can be brutal. Consider what changes when you move from 67 to 62:

• You lose five years of contributions and investment growth
• Your portfolio needs to last five additional years
• Your Social Security benefit is reduced significantly
• You'll have a gap in health insurance coverage before Medicare kicks in at 65

On the flip side, working just a few extra years can dramatically improve your financial picture. More contributions, more growth, a shorter drawdown period, and a larger Social Security check all compound on each other.

Use the calculator to run your numbers at a few different retirement ages. The difference between retiring at 62 versus 67 is often staggering, and seeing it laid out in concrete numbers can make the decision feel a lot clearer.

Inflation is the quiet threat that most retirement plans underestimate. Even at a modest 2.5% annual rate, prices double roughly every 28 years. That means if you retire today and plan to spend $4,000 a month, someone in your same situation retiring 28 years from now would need about $8,000 a month just to have the same purchasing power.

For retirement planning, inflation matters in two distinct ways.

First, it affects how much you need to save. Your target is expressed in today's dollars, but the actual dollar amount you'll need at retirement is higher because everything will cost more. The calculator accounts for this by inflating your target income to reflect future prices.

Second, inflation continues to erode your purchasing power during retirement. A fixed withdrawal of $4,000 a month at age 67 might feel comfortable at first, but by the time you're 85, that same $4,000 buys noticeably less. This is one reason financial planners often recommend building in annual spending increases or holding a portion of your portfolio in inflation-sensitive assets like stocks or Treasury Inflation-Protected Securities (TIPS).

The standard assumption in most retirement calculators is an inflation rate between 2% and 3%. If you're especially worried about inflation, bumping that assumption up slightly in the calculator gives you a more conservative (and arguably more realistic) picture of what you'll need.

Retirement readiness comes down to one core question: will you have enough? The gap analysis answers it directly by comparing your projected savings at retirement to the amount you'll actually need.

If your projections show you're on track or ahead, great. You can use the results to stress-test your plan against different scenarios, like a lower-than-expected investment return or a longer-than-average retirement. Seeing that your plan holds up even under less favorable assumptions is genuinely reassuring.

If there's a shortfall, the calculator helps you understand how big it is and what it would take to close it. Common ways to address a gap include:

• Increasing your monthly savings rate, even incrementally
• Delaying retirement by a few years to allow more time for growth and contributions
• Reducing your expected retirement spending target
• Adjusting your asset allocation to pursue a slightly higher long-term return
• Factoring in other income sources you may have overlooked, like rental income, a part-time job, or an inheritance

A gap doesn't mean you've failed. It means you have actionable information. Most people who run a retirement readiness check for the first time discover they need to make some adjustments, and that discovery is far more valuable when you still have years to act on it.

Run the calculator, look at your gap honestly, and pick one or two changes you can make right now. Small moves made consistently over time add up to a retirement that actually works.