Whether you’re budgeting or planning for your retirement date, it usually comes down to the same basic math: How much money you can reliably generate and how it compares to your budget. To help you estimate how much you’ll need to retire, let’s use the example of a 50-year-old with an $875,000 401(k) account and a total monthly budget of $5,000 ($60,000 per year).
A financial advisor can help evaluate income sources, simulate withdrawal strategies and evaluate how long your savings may last based on different assumptions.
Estimating your retirement date starts with having a clear understanding of your expenses. An “all” budget considers regular monthly expenses, including housing, insurance, utilities, debt repayment, food, transportation and recurring discretionary expenses. In this example, total expenses are $5,000 per month, or $60,000 per year ($5,000 × 12), which is the income goal that retirement savings must support.
This baseline reflects only predictable spending. Non-routine or one-time costs, such as travel, home repairs or medical bills, that go beyond monthly figures often require additional flexibility to avoid unexpected reductions in savings.
At age 50, it’s also important to know what expenses are likely to change over time. As retirement approaches, expenses such as child care or education savings may decrease, while other expenses such as health insurance, out-of-pocket medical expenses and long-term care insurance may increase.
Some guides estimate retirement spending may be lower than preretirement spending. Using the 80% assumption, an annual budget of $60,000 is equivalent to $48,000 per year ($60,000 × 0.80), or $4,000 per month. This example continues using the full figure of $5,000 per month to reflect current expenses.
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Despite the uncertainty around the program, many families still include Social Security in their retirement plans. If your family budget is $60,000 per year, your pre-tax income will probably be about $83,000 per year unless you have a huge savings plan. Using SmartAsset’s Social Security calculator, that income would translate into about $3,496 per month, or $41,452 per year, in Social Security income if you were collecting benefits at age 65.
By comparison, if you collect benefits at the earliest age (62), your annual estimate will drop to $2,819 per month ($33,828 per year). Compared to your initial estimate at age 65, your benefit at age 66 will increase slightly to $3,764 per month ($45,179 per year). At age 70, your benefit will increase to $5,001 per month ($60,023 per year).
Now, let’s look at your portfolio. Using SmartAsset’s 401(k) calculator, if you have $875,000 in your 401(k) account at age 50 and continue to contribute 10% of your pretax income (roughly $8,000 per year), a 7% annual return could take your savings from $875,000 to $1.275 million by age 55.
For the sake of comparison, let’s assume you’re willing to take on more risk. If you shifted your portfolio to S&P 500 index funds in pursuit of the market’s average annual return of 12%, you might have a 401(k) fund worth about $1.595 million at age 55.
Alternatively, if you can prioritize capital preservation, moving to low-growth, high-safety assets may be an option for you. For example, the annualized rate of return of the corporate bond market in January 2026 is approximately 4.28%1. Although the returns are lower, the income is more predictable, which would result in a portfolio value of approximately $1.124 million by age 55.
So when can you retire? Under these assumptions, retirement could be as early as age 55, depending on lifestyle and spending needs.
Access to retirement funds is a key limitation. The Internal Revenue Service (IRS) generally limits penalty-free withdrawals from tax-advantaged accounts before age 59½. However, if you leave your job before or after age 55, you can take distributions from your 401(k) without paying the 10% early withdrawal penalty. If you leave your job before age 55, withdrawals from your 401(k) are generally subject to penalties until age 59½. Under limited circumstances, IRS Rule 72