You Have $500,000 in Your 401(k). How Much Retirement Income Does That Actually Buy?
A retirement-account balance is useful, but it is not a paycheck. The better question is how much income your savings may need to provide after Social Security, pensions and other reliable income are counted.
This guide uses current Social Security Administration and IRS guidance plus the 2026 EBRI/Greenwald Retirement Confidence Survey. The percentage examples are arithmetic illustrations, not recommended withdrawal rates. Terra’s calculator makes the assumptions visible so you can change them yourself. Read Terra’s editorial standards →
Short answer: $500,000 can support very different retirements depending on how much income the portfolio must replace, how long withdrawals may last, inflation, taxes and the order of market returns.
Stop asking whether the balance is “good.” Ask how much of your monthly spending must come from the portfolio after Social Security and pensions are added.
Start by translating the balance into first-year income
Suppose you retire with $500,000. A simple first-year percentage calculation looks like this:
| Illustrative first-year withdrawal | Annual portfolio withdrawal | Monthly equivalent |
|---|---|---|
| 3% | $15,000 | $1,250 |
| 4% | $20,000 | $1,667 |
| 5% | $25,000 | $2,083 |
These numbers are not statements about what is “safe.” They simply show why a six-figure balance can translate into a much smaller monthly income than the headline balance suggests.
Turn your retirement balance into a monthly-income picture.
Add Social Security and pension income, compare withdrawal percentages, enter your spending target, and stress-test the portfolio over 20–35 years.
The account is only one part of the retirement paycheck
Suppose the same retiree expects $2,500 per month from Social Security. A $20,000 first-year portfolio withdrawal adds about $1,667 per month, creating roughly $4,167 per month before taxes. Add a $1,500 monthly pension and the picture becomes about $5,667 per month.
Nothing about the $500,000 balance changed. The retirement problem changed because the amount the portfolio must supply changed.
The Social Security Administration says a personal my Social Security account can show retirement estimates based on your earnings record and selected claiming age.1 That personalized estimate belongs in the income calculation rather than a generic national average.
Retirement may begin earlier than you expect
The 2026 EBRI/Greenwald Retirement Confidence Survey was fielded among more than 2,500 Americans age 25 or older and found retirement confidence had weakened amid concerns about costs and retirement security.2 One recurring planning lesson is that the age someone expects to retire and the age retirement actually begins do not always match.
An earlier-than-planned retirement can mean fewer contribution years, fewer compounding years and more years of portfolio withdrawals. That is why a useful plan should test more than one retirement length instead of assuming one exact endpoint.
How long might the portfolio need to help?
| If retirement begins at 65 | Planning period | Scenario extends to |
|---|---|---|
| 20-year plan | 20 years | Age 85 |
| 25-year plan | 25 years | Age 90 |
| 30-year plan | 30 years | Age 95 |
| 35-year plan | 35 years | Age 100 |
Those are stress-test horizons, not lifespan predictions. Their purpose is to show how sensitive a portfolio can be to the number of years it must support withdrawals.
Inflation changes the paycheck you need
If a household needs $5,000 per month today and inflation averages 3%, the same spending level would cost roughly $6,720 per month 10 years later and about $9,030 after 20 years. Actual inflation will not arrive in a smooth line, but the example shows why future-dollar income should not be mistaken for today’s purchasing power.
Taxes can change what reaches your checking account
A $2,000 withdrawal is not necessarily $2,000 of spendable income. Traditional 401(k) and IRA withdrawals generally create taxable income, while qualified Roth distributions can receive different treatment. Traditional retirement accounts can also become subject to required minimum distributions. Current IRS guidance says the first RMD generally applies for the year an IRA owner reaches age 73, subject to account type and other rules.3
This quick guide and calculator stay pre-tax on purpose. Terra’s Retirement Income Planner is the next step when taxes, RMDs, survivor planning and multiple income streams need to be modeled together.
The order of returns matters
Two portfolios can earn the same long-run average return and still produce different retirement outcomes when withdrawals are happening. A major decline early in retirement forces withdrawals from a depressed portfolio and leaves fewer dollars participating in a later recovery. That is sequence-of-returns risk.
That is also why the calculator’s smooth-return projection should be used as a stress-testing illustration, not as a forecast of actual market results.
A better framework: reliable income, portfolio income and spending
| Layer | Examples | Question to ask |
|---|---|---|
| Reliable income | Social Security, pensions, annuity income already in place | How much of essential spending does this cover? |
| Portfolio income | 401(k), IRA and taxable-account withdrawals | How much must investments supply? |
| Essential spending | Housing, food, insurance, health care | How much is difficult to reduce? |
| Flexible spending | Travel, gifts, discretionary purchases | What could be adjusted after a poor market year? |
Same $500,000. Different retirement problem.
Household A receives $4,500 per month from Social Security and pensions and needs $5,500 per month. Its portfolio needs to supply about $1,000 per month.
Household B receives $2,500 per month from Social Security, has no pension and also needs $5,500 per month. Its portfolio must supply about $3,000 per month.
The account balance is identical. The job assigned to the portfolio is not.
Your retirement balance matters, but it is not the retirement plan. Translate the balance into income, add reliable income, compare the result with spending, and then stress-test how long the portfolio may need to do the job.
Common questions
Does a 4% withdrawal mean the portfolio will last 30 years?
No. A percentage example does not guarantee a lifespan. Market returns, inflation, taxes, fees, spending changes and withdrawal timing all matter.
Should Social Security be included in the same calculation?
Yes, if you have a reasonable estimate. Social Security reduces the amount the investment portfolio must supply. Use your own SSA estimate rather than a national average.
Does this calculator include taxes?
No. The quick calculator is intentionally pre-tax. Use Terra’s Retirement Income Planner for a deeper tax-aware scenario.
What if I retire earlier than planned?
Rerun the scenario with a longer planning horizon and updated Social Security/pension assumptions. Earlier retirement usually gives the portfolio more years to fund and fewer years to accumulate.
Sources
- Social Security Administration, “Get a benefits estimate” and retirement calculators. Source →
- Employee Benefit Research Institute / Greenwald Research, 2026 Retirement Confidence Survey, fielded Jan. 2–28, 2026. Source →
- Internal Revenue Service, “Retirement plan and IRA required minimum distributions FAQs.” Source →
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