Retirement Calculator
Understanding Your Retirement Projection
Retirement planning comes down to two questions: how much will I have saved by the time I stop working, and how much income will that actually provide? The calculator above answers both. It projects your nest egg by compounding your current savings and ongoing contributions over the years until retirement, then estimates the yearly income that nest egg could support using a withdrawal rate you choose.
The inputs that shape your result are your current age and target retirement age (which together set your time horizon), what you've already saved, how much you add each month, your expected return, and your withdrawal rate. Of these, time and consistency matter most — the same compounding effect that builds wealth in any long-term investment is what turns steady retirement contributions into a substantial nest egg.
Why starting early is everything in retirement
A dollar invested in your twenties has decades to compound; the same dollar invested in your fifties has only a few years. Run the calculator with two scenarios: a small monthly contribution starting young, versus a larger one starting later. The early start often produces a bigger nest egg despite smaller contributions, because time does the heavy lifting. This is the single most important idea in retirement saving — the best time to start was years ago, and the second-best time is now.
What the 4% rule means
The withdrawal rate translates your nest egg into income. The "4% rule" is a widely cited rule of thumb suggesting that withdrawing about 4% of your savings in the first year of retirement — then adjusting for inflation each year after — gives a reasonable chance of your money lasting roughly 30 years. It comes from historical research on market returns and is a starting point, not a guarantee. A lower withdrawal rate is more conservative and makes your money last longer; a higher rate gives more income now but raises the risk of running short. The calculator lets you test different rates so you can see the tradeoff.
Choosing a realistic return
The expected return has a large effect over decades, so be honest with it. Diversified long-term stock investing has historically averaged in the range of roughly 7% per year before inflation, though any single year can be far higher or lower, and the past doesn't guarantee the future. As people approach retirement, many shift toward more conservative investments, which typically lowers expected returns but reduces risk. If you want a more cautious projection, model a lower rate and see how it changes the outcome.
What this calculator doesn't include
This is a simplified projection, and a few real-world factors sit outside it. It doesn't include Social Security or pension income, which for many people will supplement the nest egg meaningfully. It doesn't account for taxes, which depend heavily on the type of account — a traditional 401(k) or IRA is taxed on withdrawal, while a Roth account is generally tax-free in retirement. And it shows nominal dollars, not inflation-adjusted ones, so the future buying power of the projected income will be lower than the number suggests. Treat the result as a directional estimate to guide your saving, not a precise forecast.
Common questions
How much do I need to retire? There's no universal number — it depends on the lifestyle you want, your other income sources, where you live, and how long your retirement lasts. A common framing is to estimate your desired annual retirement income, subtract expected Social Security and pension income, and use the calculator to work out the nest egg needed to cover the rest at your chosen withdrawal rate.
Should I count on Social Security? Most people will receive some Social Security income, and you can get a personalized estimate from the Social Security Administration. Because this calculator excludes it, your total retirement income may be higher than the figure shown here. Treat Social Security as a supplement layered on top of the nest egg projection.
What account should I use to save for retirement? Tax-advantaged accounts like a 401(k), traditional IRA, or Roth IRA are designed for this and offer tax benefits that a regular brokerage account doesn't. If an employer offers a matching contribution, capturing that match is one of the highest-return moves available, since it's effectively free money added to your savings.
Is the 4% rule safe? It's a useful guideline drawn from historical data, not a guarantee. Market conditions, how long you live, and your spending flexibility all affect whether savings last. Many retirees adjust their withdrawals up or down based on how their investments perform rather than following a fixed rate rigidly. Use the rule as a planning anchor, and revisit your plan as retirement approaches.
This guide is for educational purposes only and is not financial, investment, or tax advice. Retirement projections rely on assumptions that may not reflect actual future results, and investment returns are never guaranteed. Consult a qualified financial professional to build a plan suited to your circumstances.