What this article covers
Opher Ganel explains a simple way to estimate how much you need to retire: take your current income minus what you save, then multiply by 25 to match the 4% rule. He then shows how Social Security (even at 80% of promised benefits) and a $30,000 side income can cut more than $1 million from that target, and closes with seven ways to build that side income.
Key Takeaways
To estimate how much you need to retire, multiply your income minus savings by 25
Opher Ganel suggests budgeting for 100% of your current income minus what you set aside, since costs like childcare and commuting may fall while medical, travel and recreation costs rise. Multiplying that budget by 25 gives the portfolio that supports it at a 4% initial withdrawal, the rule he still uses for his own planning despite arguments for 3% or 3.5%.
Social Security can cut your required retirement portfolio by hundreds of thousands of dollars
In Opher’s estimates, Social Security halves the portfolio needed for a $25,000 budget and trims $700,000 from the target for a $100,000 budget. Even if benefits are cut to 80% of what was promised, as the Congressional Research Service projected once the trust fund is depleted, the reduction is still $560,000 for a $100,000 budget.
A $30,000 side income in retirement can cut more than $1 million from what you need to save
Combined with an 80% Social Security benefit, a $30,000 side income eliminates the need for savings on a $25,000 budget and leaves less than 10% of the original target for a $50,000 budget. For a $100,000 budget, the target falls by about $1.3 million, with pensions, income annuities, rental properties, ongoing sales, hobby income and part-time work as possible sources.
“You should put aside at least 15% of your income for retirement, starting with your first paycheck,” I told my son. “You can include in that whatever your employer matches.”
“They don’t match,” he answered.
“Oh well, then it’s all on you,” I smiled. “It’s a good thing you’re starting early.” He had just started his first full-time job out of college.
As they say, the best time to start planning and saving for retirement (or financial independence) is as soon as you start working. The second best is right now.
If you’ve ever estimated how much you need to be able to retire, you were likely shocked. Here are ways to trim over $1 million from that target.
How Much Do You Need to Retire? It Depends on Two Numbers
If you’ve given any thought at all to your eventual retirement (you have, right?), this is the first and most confronting question you face.
The answer, like most in personal finance, is an unsatisfying “It depends.”
What does it depend on? Two main things — how much you’ll spend in retirement and how much you can withdraw annually from your retirement accounts.
How to Estimate Your Retirement Budget When Retirement Is Decades Away
Answering this accurately isn’t easy, especially if you’re decades away from retirement.
The good thing is that you don’t have to get it exactly right if you’re so far from retiring. You can (and should) revisit these calculations periodically and update them. For now, you just have to make a plausible assumption.
My personal recommendation is that you assume 100% of your current income, minus whatever savings you’re setting aside (after all, once you’re retired you won’t need to continue setting aside money for retirement :)). For example, if you’re making $50,000 a year and setting aside $5000, you can use the remaining $45,000 as your baseline.
There are other costs that will likely be gone in retirement, which you could also use as reductions, such as:
- Childcare costs
- College savings and/or tuition costs
- Work-related costs (e.g., commuting, professional dues, etc.)
- Term life insurance premiums
- Mortgage payments (assuming you plan to pay off your mortgage before retiring)
However, while many of these will likely go away, others, such as medical expenses, travel, recreational activities, gifts, etc. will likely go up. That’s why I prefer to use 100% replacement minus savings.
For retirement budgeting, I prefer to assume 100% replacement of current income minus any savings
What’s a Safe Withdrawal Rate in Retirement: 5%, 4% or 3%?
The Old 5% Rule of Thumb
This question has been researched for decades, if not longer, and the answer isn’t completely established. Back in the 80s, the accepted rule of thumb was that you could take out 5% of your portfolio during your first year in retirement, and adjust for inflation each subsequent annual draw.
For example, say you had a $1 million portfolio, you’d draw $50,000 in Year 1 of retirement. Then, if inflation was 3%, you’d draw $51,500 for Year 2. The expectation was that the total return of the portfolio would allow it to keep you going for the typical length of retirement.
The 4% Rule: What William Bengen’s Research Found
In the 90s, financial advisor William Bengen studied historical returns from 1926 to 1976, and concluded that if you had the misfortune to retire just before a major market downturn such as the Great Depression or the tough markets of the 70s, drawing 5% would cause your portfolio to fall to zero too early to support a long retirement.
His conclusion was that you’d need to reduce your initial draw to only 4% of your portfolio value in Year 1 of retirement if you wanted to be nearly certain that your portfolio would last more than 33 years.
Why Some Experts Now Suggest a 3% or 3.5% Withdrawal Rate
More recently, following a bull market for the ages, experts expect market returns to be much more muted in the coming years, giving rise to suggestions that you should only count on a 3.5% or even 3% initial draw.
Why I Still Use the 4% Rule for My Own Retirement Planning
My take is that if you’re currently in your accumulation phase, you have enough years ahead of you that we’ll likely experience many corrections (market pull-backs of more than 10% from their recent high point) and several bear markets (market pull-backs of more than 20% from their recent high point) before you make that initial draw. Thus, assuming a 3.5% or 3% draw is too pessimistic.
That’s why I’m sticking with the 4% rule for my own retirement planning. However, to mitigate the risk that I’m wrong and that 3% is the right number, I’m diversifying my retirement income planning so not all of it comes from investment returns (more on that below).
How Much You Need to Retire: Multiply Your Budget by 25
Based on all the above, the simplest plausible way to estimate how much you need to be able to retire is to take your current income, subtract what you’re setting aside each year, and then multiply the remaining number by 25 (so 4% of this new number is equal to your estimated retirement budget).
As a rough estimate of what you need to retire, multiply by 25 your current income minus savings you’re setting aside
Here are some examples of what that may mean for you.
The portfolio value you need to retire is approximately 25x your retirement budget
If your reaction is something like “I need to put aside how much?! Over a million bucks?! No way!!!” don’t despair, even if your current retirement portfolio is worth far too close to $0 and far below these mountainous amounts.
Rather than taking mountain-climbing lessons and buying virtual mountain-climbing gear, we can cut those mountains down to a more scalable height.
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How Social Security Shrinks the Retirement Savings You Need
The first chop will be courtesy of good old Social Security.
Social Security benefits replace a large portion of your income at the lowest levels, and a gradually smaller part as your income grows
I know. I know. If you’re targeting a $100,000 retirement budget, getting $28,000 from Social Security seems completely inadequate.
It is. Social Security benefits were never intended to completely replace your working income, especially if you make a solid middle-class income (or more). However, they do help chop down the mountainous portfolio value you need…
Your required portfolio size gets dramatically reduced once you consider your expected Social Security benefits
As you can see, for someone trying to replace a $25,000 annual income, the required portfolio size gets cut in half. Even for a $100,000 budget, you can trim your target portfolio by $700,000. That’s not chump change!
Will Social Security Still Be There When You Retire?
Many, if not most, younger Americans believe Social Security will not be there once they retire.
While none of us was given the gift of prophesy, the current best estimate comes from the Congressional Research Service, which estimates that once the Social Security Trust Fund is depleted (in 2035, unless Congress does something before then), promised benefits would need to be cut by 20%.
Not great, but certainly a lot better than being 100% gone, which is what so many (erroneously) expect.
Your required portfolio size gets dramatically reduced, even with only 80% of your promised Social Security benefits
Even at this reduced level, Social Security cuts your required portfolio by more than 40% for a $25,000 retirement budget, and by $560,000 for a $100,000 budget.
Even at 80% of promised benefits, Social Security reduces your required portfolio by $560,000 for a $100,000 budget
How a Side Income in Retirement Cuts Your Savings Target Even Further
Having some other source of income in retirement, even if it’s not a lot, helps even more.
Assuming a 20%-reduced Social Security benefit plus a $30k annual side income in retirement has an even more dramatic impact
Here we can see that between your (20%-reduced) Social Security benefit and a $30k side income, you actually don’t need any retirement savings for a $25,000 retirement budget (as a caveat, it’s best if that $30k side income doesn’t require your active participation since you may not be healthy enough to do much work).
For a $50,000 budget, you need less than 10% of what you would have needed before we started chopping.
Even for a $100,000 budget, you need less than half the original portfolio size, about $1,300,000 less!
Between Social Security and a side income, you could cut more than a million bucks off what you need to set aside for retirement.
How to Reach Your Retirement Savings Target
Building Your Portfolio: Save Half of Every Raise
In a piece I plan to post soon, I’ll provide a simple, easy-to-implement way to save enough to reach financial independence much sooner than you’d think you can.
For now, I’ll just give you the cheat-sheet version… Start by setting aside as much as you can today, even if it’s only 1% of your income, then, each time you get a raise, increase your savings by half the amount of the raise.
Start by setting aside today as much as you can, even if it’s only 1% of your income, then, each time you get a raise, increase your savings by half the amount of the raise.
The earlier you start, and the larger a percentage of your income that you set aside for retirement, the better (for two reasons that I discuss here).
That’s why I had that discussion with my son you saw at the start of this article, so he’d get as much of a head start as possible. I had a similar conversation with my middle daughter, and will have one with my youngest once she graduates from college.
7 Ways to Create a Side Income in Retirement
Finally, here are some ideas on how to come up with that $30k side income in retirement.
- Pensions: Few of us have one of these anymore, but if you do, that’s the easiest way to bring in extra income in retirement
- Immediate income annuities: The 4% rule is designed for your portfolio to survive severe market downturns. However, if you don’t need the money to fund a bequest, you could use some (or even all) of your portfolio to purchase immediate income annuities. These provide guaranteed payouts that can continue until your eventual death. Many factors affect the payout levels, but if you don’t require having the provider return any money to your estate upon your death, they can be far more generous than the 4% we’ve assumed for your portfolio. For example, as of this writing, according to the Charles Schwab Income Annuity Estimator, a 65-year-old single male in Maryland buying a $500,000 single-premium immediate income annuity could expect to get annual payouts of $31,224 for his lifetime, a 6.24% annual payout.
- Rental properties: Each time you move from a house you own to a new one you plan to buy, consider if you can keep the old house and rent it out (in a future piece I’ll describe how I did this myself). If rents in your area are high enough, you might clear $1,000 a month, or $12,000 a year. Even better, you may be able to shield some income from taxes through depreciation, and your ongoing mortgage payments will continue to increase your equity, ultimately benefiting your heirs.
- Ongoing sales: If you’re a writer, you can work on building a large enough body of work that can add up to a good chunk of the side income you want. For example, an author who sells a thousand copies of her various books per month on average, clearing say $3 per copy, would have an ongoing side income of about $36,000 a year.
- Hobby income: If you’re into less-well-known collectibles (e.g., vintage watches, pens, etc.), you can trade on that knowledge to buy such items inexpensively from estate sales, garage sales, etc. and then sell at their higher actual value. Similarly, if your hobby is creating jewelry, lamps, furniture, etc. selling such hand-crafted items online can be lucrative.
- Part-time work: You could also use your lifetime of knowledge and expertise to work very part time as a consultant, tutor, etc. For example, if you tutor 10 hours a week at $50 an hour, that can add up to more than $25,000 a year. As an added benefit, the continued social and mental engagement will likely make your retirement more fulfilling, ward off mental decline, and even extend your life.
- Reverse mortgages: I add this one mostly because some people won’t be able to build a side income from the other 6 ideas. If you have no better option and want to pursue this one, educate yourself thoroughly before signing anything. The gist of this arrangement is that if you own your home, you can continue living in it and get a lender to provide you with a lifetime of monthly payments. However, upon your death, the lender gets to sell your home to pay back that stream of payments along with the accrued interest. Often, there will be little if anything left for your heirs. Another problem is that moving to a different home (say to be closer to your kids) becomes complicated.
The Bottom Line: A Daunting Retirement Number Shouldn’t Stop You From Starting
Retirement planning is one of the most important and challenging tasks in personal finance. It depends on many factors that you can’t know accurately in advance, so you have to use rules of thumb and plausible estimates.
However, the fact that it’s challenging and that the amounts you’re told you need to accumulate are daunting must not stop you from doing at least a minimum of planning right away, and starting to invest for it.
If you don’t, you’ll join the dismal statistics showing how most Americans are woefully under-prepared for retirement. You can see here some estimates of how much you should already have saved for retirement given your age.
Frequently Asked Questions
How do I estimate how much money I need to retire?
The article’s simplest plausible method is to take your current income, subtract what you set aside for savings each year, and multiply the result by 25. At a 4% initial withdrawal rate, that portfolio would fund your estimated retirement budget. You should revisit and update the estimate periodically, especially if retirement is decades away.
What is the 4% rule for retirement withdrawals?
The 4% rule says you can withdraw 4% of your portfolio in your first year of retirement and adjust that amount for inflation each year after. It came from financial advisor William Bengen’s 1990s study of historical returns, which found that the older 5% rule could run a portfolio to zero too early for people who retired just before a major downturn. Some experts now argue for 3% or 3.5%, but Opher Ganel considers that too pessimistic for people still in their accumulation years.
How much does Social Security reduce the amount I need to save for retirement?
In the article’s estimates, Social Security cuts the required portfolio in half for someone with a $25,000 retirement budget and by about $700,000 for a $100,000 budget. Benefits replace a large share of income at lower income levels and a smaller share as income rises, so they were never meant to fully replace a solid middle-class income.
Will Social Security still be there when I retire?
Many younger Americans believe it won’t be, but the article cites the Congressional Research Service estimate that once the trust fund is depleted, promised benefits would need to be cut by about 20%, not eliminated. Even at 80% of promised benefits, Social Security reduces the required portfolio by more than 40% for a $25,000 budget and by $560,000 for a $100,000 budget.
What are some ways to create a side income in retirement?
The article lists pensions, immediate income annuities, rental properties, ongoing sales of creative work such as books, hobby income from collectibles or handmade goods, part-time work such as consulting or tutoring, and, as a last resort, reverse mortgages. Ideally the side income shouldn’t depend on your active participation, since you may not be healthy enough to work in later years.
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Disclaimer: This article is intended for informational purposes only, and should not be considered financial advice. You should consult a financial professional before making any major financial decisions.
About the author
Contributing Writer, Wealthtender
My career has taken some unexpected turns, from earning a PhD in experimental high-energy physics, to conducting cosmic-ray research in Antarctica, to supporting NASA projects and programs, to running my own consulting business. I also run several other small businesses and help my wife run her Marriage and Family Therapy practice.
Those experiences taught me to question assumptions, think critically, and recognize that real-world decisions of any significance rarely have simple answers that apply to everyone. Today, I bring that perspective to writing about personal finance. Drawing on my analytical background, business experience, and research, I explore financial decisions, challenge conventional wisdom, and help readers understand the tradeoffs that can affect their financial well-being. To complement my own research and experience, I also weave insights from financial professionals into my articles, drawing on their expertise and real-world experience helping clients navigate financial decisions and challenges.
At medium.com/@opher-ganel, you can read more of my articles and subscribe to receive email notifications when new ones come out.