How Long Will My 401k Last in Retirement Based on My Current Balance and Spending

This article is for informational purposes only and does not constitute financial advice. Every person's financial situation is unique. Please consult a qualified financial advisor before making any retirement planning decisions.

If you are an American aged 55 or older and you have been diligently saving in your 401k for decades, you are probably asking yourself a version of the same question: is what I have saved actually enough to last through retirement? It is one of the most important financial questions you will ever answer, and the honest truth is that for a significant portion of Americans approaching retirement, the answer is more complicated — and in some cases more concerning — than they realize.

This article walks through the real numbers. What Americans aged 55 and older actually have saved. What current inflation is doing to retirement spending. How housing costs — whether you own your home outright, carry a mortgage, or rent — fundamentally change how long your 401k will last. And how to calculate roughly how long your portfolio will last based on your balance and spending.

What Americans 55 and Older Actually Have Saved

Before discussing how long your 401k will last it is worth understanding where most Americans actually stand. The numbers from Vanguard, Fidelity, and the Federal Reserve paint a picture that surprises many people — both in terms of how little the average American has saved and how much variation exists within that average.

According to Vanguard's How America Saves report the average 401k balance for Americans aged 55 to 64 is approximately $207,874. The median balance — the midpoint where half of people have more and half have less — is significantly lower at approximately $71,168. The gap between the average and the median is large because a relatively small number of high earners with very large 401k balances pull the average up dramatically. The median is almost always the more honest representation of where most people actually stand.

For Americans aged 65 and older Fidelity reports an average 401k balance of approximately $232,710 with a median of approximately $87,700.

The Federal Reserve's Survey of Consumer Finances provides a broader picture including all retirement accounts not just 401k plans. For families headed by someone aged 55 to 64 the median retirement account balance across all account types is approximately $134,800. For families headed by someone aged 65 to 74 the median is approximately $164,000.

These numbers are sobering. They suggest that the median American approaching retirement has somewhere between $71,000 and $165,000 in retirement savings depending on the source and the age range measured. Against the backdrop of a retirement that might last 20 to 30 years these balances represent a significant challenge for many households.

There is of course enormous variation within these statistics. Many Americans approaching retirement have $500,000, $800,000, or more than $1 million in retirement savings. Many others have far less than the median. Where you fall in this distribution determines the urgency and the nature of the planning question you need to answer.

Housing — The Single Biggest Variable in Retirement Financial Security

Before getting into the calculations of how long different savings balances last it is essential to understand housing because it is the single most important variable that separates comfortable retirements from financially precarious ones at every savings level.

Housing is typically the largest single expense in any household budget. In retirement whether you own your home outright, still carry a mortgage, or rent determines how much of your 401k you need to withdraw every month to cover your basic living costs. The difference between these three situations is not marginal — it can mean the difference between a portfolio lasting 30 years and one lasting 10.

Who owns their home outright:

According to the Federal Reserve's Survey of Consumer Finances approximately 42 percent of Americans aged 65 and older own their homes free and clear with no mortgage. Among Americans aged 55 to 64 approximately 28 percent own their homes outright. This is the most financially secure housing situation for a retiree. No monthly mortgage payment. No rent. Housing costs consist only of property taxes, homeowner insurance, utilities, and maintenance — typically $800 to $1,500 per month depending on location and property size.

For this group the retirement picture is dramatically better than for their peers with mortgages or rental costs at the same savings level. A retiree who owns their home outright and spends $3,500 per month total needs $1,200 to $2,000 less per month from their portfolio than a renter spending the same amount on everything except housing.

Who still carries a mortgage:

Approximately 35 to 40 percent of Americans aged 65 and older still carry a mortgage on their primary residence. Among Americans aged 55 to 64 this proportion is higher at approximately 55 percent. The average mortgage payment for homeowners aged 65 and older is approximately $1,200 to $1,800 per month depending on when the home was purchased and the current interest rate environment. For people who refinanced during the low-rate period of 2020 and 2021 their mortgage payment may be relatively manageable. For people who purchased recently at current interest rates of 6 to 7 percent a mortgage can represent $2,000 to $3,000 or more per month.

Carrying a mortgage into retirement is not inherently problematic if the balance is manageable relative to the home's value and the retiree's income. However it does mean that a significant portion of monthly retirement spending — and therefore a significant portion of the required portfolio withdrawal — is going toward a fixed debt obligation rather than discretionary lifestyle expenses. This reduces flexibility and increases the monthly draw on the 401k.

Who rents in retirement:

Approximately 20 to 22 percent of Americans aged 65 and older rent their primary residence. Among Americans aged 55 to 64 this proportion is approximately 27 percent. Renting in retirement presents a fundamentally different financial challenge than homeownership because rental costs are not fixed — they are subject to landlord decisions and market conditions and they have inflated dramatically over the past several years.

According to data from the Harvard Joint Center for Housing Studies the median rent for Americans aged 65 and older is approximately $1,200 to $1,500 per month nationally. In high-cost metropolitan areas — New York, San Francisco, Los Angeles, Boston, Miami, Seattle — median rents for retirees are significantly higher at $2,000 to $3,500 per month or more. The national average rent across all renter households has increased by approximately 30 percent since 2020 and in many markets the increase has been 40 to 50 percent. A retiree who budgeted $1,200 per month for rent in 2020 may now be paying $1,500 to $1,800 for the same apartment.

The inflation rate for rental housing has consistently exceeded general CPI in recent years and many housing economists expect this to continue given the structural shortage of housing supply in most American metropolitan areas. This makes rental housing the highest-inflation major expense category for the approximately 20 percent of American retirees who rent.

What average housing costs look like by situation:

According to the Bureau of Labor Statistics Consumer Expenditure Survey Americans aged 65 and older spend on average approximately $17,000 to $20,000 per year on housing overall. This breaks down very differently by ownership status.

Homeowners without a mortgage spend approximately $9,000 to $12,000 per year on housing — property taxes, insurance, utilities, and maintenance. This works out to approximately $750 to $1,000 per month.

Homeowners with a mortgage spend approximately $15,000 to $22,000 per year on housing including mortgage payments, taxes, insurance, and maintenance. This works out to approximately $1,250 to $1,833 per month.

Renters spend approximately $14,000 to $24,000 per year on rent and utilities depending on location. This works out to approximately $1,167 to $2,000 per month nationally and significantly more in high-cost cities.

The difference between the best case — outright homeowner at $750 per month — and the worst case — renter in a high-cost city at $2,500 or more per month — is $1,750 to $1,850 per month. That is $21,000 to $22,200 per year more that a renter in an expensive city needs to withdraw from their 401k compared to an outright homeowner with the same lifestyle in all other respects. The compounding effect of this difference on portfolio longevity is enormous.

The Basic Calculation — How Long Will Your 401k Last

The fundamental question of how long your 401k will last depends on three variables. Your current balance. Your monthly withdrawal amount. And your expected annual return on the remaining balance. Housing situation is embedded in the monthly withdrawal amount — it is the single biggest driver of how much you need from your portfolio each month.

Let us work through several real-world scenarios using balances that reflect actual American retirement savings levels and housing situations that reflect the statistical reality.

Scenario one — the median American near-retiree who rents:

Balance $134,800. Monthly spending $4,200 including $1,500 rent. Social Security $1,600 per month. Required portfolio withdrawal $2,600 per month. Expected annual return 5 percent.

At these numbers the 401k lasts approximately 5 years and 2 months. A person retiring at 65 with the median retirement savings who rents runs out of savings at approximately age 70. After that they are entirely dependent on Social Security. Their $1,600 Social Security benefit covers their rent and basic necessities but leaves almost nothing for healthcare, transport, food, or any discretionary spending. This is a genuinely precarious retirement scenario that describes a meaningful portion of American retirees.

Scenario two — the median American near-retiree who owns their home outright:

Balance $134,800. Monthly spending $3,000 including $850 homeownership costs. Social Security $1,600 per month. Required portfolio withdrawal $1,400 per month. Expected annual return 5 percent.

At these numbers the 401k lasts approximately 11 years and 3 months. The same median savings balance in the same household lasts more than twice as long simply because the person owns their home outright. A person retiring at 65 depletes their portfolio at approximately age 76. This is still a challenging situation — 11 years of savings followed by Social Security only — but it is dramatically more manageable than the renter scenario.

This comparison illustrates one of the most important retirement planning insights available. For median savers homeownership status may matter more to retirement financial security than anything else including savings rate, investment returns, or Social Security timing. The difference in portfolio longevity between renting and owning outright — more than 6 years at the same savings level — is larger than the difference between most other retirement planning decisions.

Scenario three — the above-average retiree with a mortgage:

Balance $350,000. Monthly spending $5,200 including $1,800 mortgage payment. Social Security $2,000 per month. Required portfolio withdrawal $3,200 per month. Expected annual return 5.5 percent.

At these numbers the 401k lasts approximately 11 years. A person retiring at 65 depletes their portfolio at approximately age 76. Note that this person has nearly three times the savings of the median retiree but the mortgage payment brings their portfolio longevity down to approximately the same level as the median homeowner who owns outright. The mortgage is consuming the advantage of higher savings.

Scenario four — the above-average retiree who owns outright:

Balance $350,000. Monthly spending $3,800 including $900 homeownership costs. Social Security $2,000 per month. Required portfolio withdrawal $1,800 per month. Expected annual return 5.5 percent.

At these numbers the 401k lasts approximately 26 years. A person retiring at 65 depletes their portfolio at approximately age 91. The same $350,000 balance in a mortgage-free home with lower monthly spending lasts 15 years longer than the same balance with a mortgage. This is the single most dramatic illustration of how housing situation transforms retirement financial security.

Scenario five — the well-prepared retiree who owns outright:

Balance $750,000. Monthly spending $4,500 including $950 homeownership costs. Social Security $2,200 per month. Required portfolio withdrawal $2,300 per month. Expected annual return 6 percent.

At these numbers the 401k does not deplete within a normal retirement timeframe. The portfolio is growing faster than it is being drawn down. This person has achieved genuine financial security in retirement.

Scenario six — the well-prepared retiree who rents in a high-cost city:

Balance $750,000. Monthly spending $6,500 including $2,800 rent in a high-cost metropolitan area. Social Security $2,200 per month. Required portfolio withdrawal $4,300 per month. Expected annual return 6 percent.

At these numbers the 401k lasts approximately 21 years. A person retiring at 65 depletes their portfolio at approximately age 86. The same $750,000 balance with a high rental cost produces a depletion age 15 or more years earlier than the outright homeowner scenario. This person needs to seriously consider whether their city of retirement is financially sustainable for a 20 to 30 year retirement.

What Inflation Is Actually Doing to Retirement Spending

The scenarios above assume fixed monthly withdrawal amounts. But retirement spending does not stay fixed. It increases every year because of inflation. And the current inflation environment has fundamentally changed the retirement spending picture for everyone who retired in the past three years or who is planning to retire in the next few years.

After decades of relatively low and stable inflation — averaging approximately 2 percent annually from the early 1990s through 2020 — inflation surged dramatically in 2021 and 2022. The Consumer Price Index peaked at 9.1 percent in June 2022, the highest level since 1981. While inflation has moderated since that peak it remained elevated at 3 to 4 percent through much of 2023 and into 2024. The cumulative effect of this inflation surge on retirement spending is significant and permanent.

Consider what has happened to specific spending categories that matter most to retirees since 2020. Grocery prices have increased by approximately 25 percent cumulatively. Electricity and utility costs have increased by approximately 30 percent in many parts of the country. Healthcare costs have continued their long-term trend of inflating at 5 to 7 percent annually. Housing costs — both rents and homeowner expenses including property taxes and insurance — have increased dramatically in most markets.

For a retiree who budgeted $4,000 per month in spending in 2020 the same lifestyle costs approximately $4,800 to $5,200 per month in 2024 depending on their specific spending mix. That is an increase of $800 to $1,200 per month — $9,600 to $14,400 per year — driven purely by inflation with no change in lifestyle.

Rental inflation deserves special attention because it has been particularly severe and shows no signs of reverting to pre-2020 levels. National asking rents for new leases increased by approximately 25 to 30 percent between 2020 and 2023. Even as rent growth has slowed from its peak the cumulative increase is permanent. A retiree who locked in a rent of $1,200 per month in 2019 and has since moved or had their lease renewed may now be paying $1,500 to $1,800 for comparable housing. This permanent step-up in rental costs directly accelerates portfolio depletion for the 20 percent of retirees who rent.

For homeowners property taxes and homeowner insurance have also increased significantly. Property assessments in most markets have risen sharply following the surge in home values since 2020. Homeowner insurance premiums have increased dramatically in many states — particularly in Florida, California, Texas, and other states affected by natural disaster risk — with some markets seeing 30 to 50 percent premium increases in a single year.

Per-Category Inflation — Why One Rate Is Not Enough

One of the most significant errors in standard retirement planning calculations is applying a single inflation rate to all spending categories equally. In reality different categories of spending inflate at dramatically different rates and understanding this difference produces a much more honest — and often more sobering — projection of how long your 401k will last.

Healthcare is the most important example. Healthcare costs for American retirees have inflated at approximately 5 to 7 percent annually for decades. A retiree who spends $500 per month on healthcare today will spend approximately $814 per month in 10 years at 5 percent annual inflation and approximately $1,326 per month in 20 years. For many retirees healthcare becomes the largest or second-largest spending category by their late 70s and 80s.

Housing inflation varies dramatically by ownership status. Outright homeowners face property tax increases of 2 to 4 percent annually in most markets, homeowner insurance increases of 3 to 8 percent in many states, and maintenance and repair costs that inflate at general construction rates of 3 to 5 percent annually. Renters face market rental inflation which has averaged 4 to 6 percent annually over the past decade nationally and significantly more in high-cost markets. The appropriate inflation rate for housing in your retirement projection depends entirely on whether you own or rent.

Food and grocery inflation has been approximately 3 percent annually over the long term though the 2021 to 2022 surge pushed cumulative grocery prices significantly above that trend. A 3 percent annual inflation rate for food is a reasonable long-term assumption though the recent experience suggests this category can spike significantly during inflationary periods.

Transport costs including vehicle maintenance, insurance, and fuel have inflated at approximately 3 percent annually over the long term. Vehicle insurance has been a notable exception inflating at 5 to 8 percent in recent years in many states driven by rising repair costs and litigation.

Personal and lifestyle spending — entertainment, personal care, clothing, subscriptions — has generally inflated at 2 to 2.5 percent annually making it the slowest-inflating major category in a typical retirement budget.

A retirement projection that applies a single 3 percent inflation rate to all spending dramatically underestimates how fast healthcare and rental housing costs will grow and significantly overestimates how long your 401k will last. The honest projection applies a separate inflation rate to each spending category and sums the results to produce a total spending forecast that reflects how your actual expenses will grow over time.

The 4 Percent Rule and Its Limitations in the Current Environment

Any discussion of 401k longevity eventually arrives at the 4 percent rule — the widely cited guideline suggesting that withdrawing 4 percent of your portfolio annually in the first year of retirement and adjusting for inflation each year thereafter gives your portfolio a high probability of lasting 30 years.

The 4 percent rule was developed by financial planner William Bengen in 1994 based on historical market returns and inflation data going back to 1926. At a $500,000 portfolio the 4 percent rule suggests withdrawing $20,000 in the first year — approximately $1,667 per month — and adjusting that amount upward each year for inflation.

However the 4 percent rule has important limitations in the current environment. It was developed during a period of historically high bond yields. It assumes a 30-year retirement which may not be long enough for someone retiring at 55 or 60. It applies a single blended inflation adjustment rather than per-category rates. And it does not account for the dramatically different spending levels of retirees in different housing situations.

A retiree who owns their home outright and needs only $1,667 per month from their portfolio faces a very different risk profile than a renter who needs $3,500 per month from the same portfolio. The 4 percent rule gives the same guidance to both but their actual risk of running out of money is completely different.

Many financial planners today suggest that a 3 to 3.5 percent withdrawal rate is more appropriate for retirements beginning in the current environment particularly for people retiring before age 65 who face longer retirement horizons. For renters in high-cost cities an even more conservative withdrawal rate may be warranted given the pace of rental inflation and the lack of control renters have over their single largest expense.

The Interaction Between Your 401k and Social Security

For most Americans the 401k does not operate in isolation. Social Security provides a baseline of inflation-protected income that directly reduces how much you need to withdraw from your 401k each month. Understanding this interaction is essential to calculating how long your portfolio actually lasts.

If your monthly spending is $4,500 and you receive $1,800 per month in Social Security you only need $2,700 per month from your portfolio. If you delay Social Security to 70 and receive $2,480 per month instead your required portfolio withdrawal drops to $2,020 per month. That reduction of $680 per month — $8,160 per year — in required portfolio withdrawal has a compounding effect on portfolio longevity that extends your 401k by years not months.

The interaction between Social Security timing and housing situation creates the most significant range of retirement outcomes. A renter who claims Social Security at 62 and receives a permanently reduced benefit has both the highest monthly housing cost and the lowest monthly Social Security income — a double disadvantage that places enormous pressure on their portfolio. An outright homeowner who delays Social Security to 70 has both the lowest monthly housing cost and the highest monthly Social Security income — a double advantage that produces dramatically better portfolio longevity at every savings level.

The Retirement Relocation Calculation

For renters in high-cost metropolitan areas and for retirees carrying significant mortgages the question of where to retire deserves serious financial analysis. The same retirement savings that produces a precarious 8 to 10 year runway in San Francisco, New York, or Boston may produce a comfortable 20 to 25 year runway in Phoenix, Raleigh, Asheville, or Sarasota where housing costs are significantly lower.

According to data from the Council for Community and Economic Research the cost of living differential between the most expensive and most affordable American cities for retirees is approximately 40 to 60 percent. A retiree spending $5,500 per month in San Francisco might replicate the same lifestyle for $3,200 to $3,500 per month in a mid-cost Sun Belt city. That spending reduction of $2,000 to $2,300 per month translates to a dramatically longer portfolio runway at every savings level.

For renters approaching retirement the financial case for relocating to a lower-cost city before or at retirement is among the most impactful planning decisions available. It simultaneously reduces the highest-inflation expense in the retirement budget, reduces the monthly portfolio withdrawal required, and extends portfolio longevity in a way that no investment strategy or savings increase can match dollar for dollar.

For homeowners considering selling a high-value home in an expensive city and purchasing a less expensive home outright in a more affordable location the financial case is also compelling. Converting mortgage debt to outright homeownership while extracting equity to supplement retirement savings can transform the retirement financial picture entirely. A homeowner who sells a $900,000 San Francisco home with a $400,000 mortgage remaining, purchases a $350,000 home in Raleigh outright, and adds $150,000 to their retirement savings has simultaneously eliminated their mortgage payment, added to their investable assets, and significantly reduced their monthly housing costs. The combined effect on portfolio longevity can be 10 to 15 years or more.

What You Can Do With This Information

Understanding that the median American aged 55 to 64 has approximately $71,000 to $134,000 in retirement savings — and that this amount at typical withdrawal rates lasts 5 to 11 years depending heavily on housing situation — is sobering information. But it is actionable information which is far better than vague anxiety about whether you have saved enough.

If your balance is below what the scenarios above suggest you need there are meaningful levers available to you right now. Working two to three additional years increases your savings balance while shortening the retirement period you need to fund. Delaying Social Security by even two or three years significantly increases the monthly benefit that reduces your required portfolio withdrawal. Evaluating your housing situation honestly — whether staying in your current home, paying down your mortgage aggressively before retirement, or considering relocation — may be the single highest-impact financial decision you make in the decade before retirement. Reducing monthly spending by $300 to $500 extends portfolio longevity by years in a mathematically significant way.

If your balance is at or above the well-prepared scenarios and you own your home outright the question shifts from will my money last to how do I optimize the interaction between my portfolio, Social Security, housing costs, and spending to maximize the security and flexibility of my retirement. Per-category inflation modeling, Social Security timing optimization, and scenario planning for different spending levels all become relevant tools for this group.

Knowing Your Own Number

The statistics about what Americans have saved and what they spend on housing are informative but they are not your number. Your retirement picture depends on your specific balance, your specific monthly spending by category including your actual housing costs, your specific Social Security benefit and the age at which you plan to claim it, and the specific growth rates of your individual accounts.

The honest calculation requires tracking actual monthly spending by category, applying realistic per-category inflation rates including the appropriate inflation rate for your specific housing situation, modeling different Social Security claiming ages as separate scenarios, and updating the picture regularly as your balance changes and your spending evolves.

For renters that means applying a realistic rental inflation rate — potentially 4 to 6 percent annually — to the largest line item in the retirement budget. For outright homeowners it means applying a more modest but still real inflation rate to property taxes, insurance, and maintenance. For homeowners with mortgages it means understanding when the mortgage ends and modeling the spending reduction that occurs at payoff.

The difference between a retirement projection built on generic assumptions and one built on your real spending by category with realistic per-category inflation rates is not academic. As the scenarios in this article illustrate it can be the difference between a portfolio lasting 8 years and one lasting 26 years — not because the savings balance is different but because the spending picture is more accurately modeled.