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Jana Murr \/ Getty Images<\/p>\n
Your crucial retirement number isn\u2019t the balance of your 401(k). <\/p>\n
Most households should aim to replace 70% to 85% of their pre-retirement pay, combining savings withdrawals with Social Security.<\/p>\n
Adjusting the mix of contributions, your claiming age, and products such as annuities<\/a> lets you hit a personalized replacement target.<\/p>\n Reaching $1 million in your 401(k) is a big milestone, but a seven\u2011figure balance can be a mirage. The question is whether all of your retirement resources\u2014401(k), individual retirement account (IRA), brokerage account, cash, and Social Security\u2014can be counted on to reliably replace enough of your paycheck<\/a> to keep your lifestyle intact for decades.<\/p>\n That percentage is called your income replacement ratio, and it tells a far clearer story than any single account balance can.<\/p>\n A 2025 survey found that Americans, on average, believe $1.3 million is the magic retirement savings number<\/a>, yet nearly half expect to retire with less than $500,000. Even a full $1 million\u2014drawn down via the classic 4% rule<\/a>\u2014produces just $40,000 a year before taxes. Factor in longer life spans, market volatility, and health care costs, and that seven-figure balance quickly loses its luster.<\/p>\n The reality is sobering: The average 401(k) balance of a Gen Xer<\/a> is about $190,000, while the average balance for Boomers nearing or already in retirement is about $250,000. Those drawdowns at 4% would replace about $10,000 a year\u2014a fraction of most household budgets.<\/p>\n Clearly, lump sums alone do not reveal whether you can sustain your lifestyle.<\/p>\n Withdrawals made from a 401(k) or traditional IRA are taxed as income at your tax bracket<\/a> at the time of the withdrawal.<\/p>\n Think in percentages, not dollars. Traditional financial advice recommends replacing 75% of your final after-tax salary as a reasonable starting point, while other planners cite a higher 80% to 85% rule of thumb. But replacement ratios are not one\u2011size\u2011fits\u2011all.<\/p>\n Social Security benefits<\/a> are designed to replace about 40% of pre-retirement annual earnings, with lower\u2011income workers receiving a higher proportion and high earners receiving far less. Fidelity\u2019s internal analysis shows that households without pensions need enough savings to replace at least 45% of their pre-retirement income, because Social Security and lower retirement taxes should fill in the rest.<\/p>\n The upshot: Estimate your own ratio by subtracting projected Social Security and any pension income from your target percentage. The gap that remains is the annual withdrawal your nest egg must fund.<\/p>\n It’s helpful to consider Kiplinger\u2019s \u201crule of $1,000.” For every $1,000 of monthly income you want, you\u2019ll need about $240,000 in savings (at a 5% withdrawal rate and 5% market return). Want $3,000 a month on top of Social Security? Plan to have saved about $720,000 in 2025 dollars\u2014substantial, but less scary than chasing a random $1 million target.<\/p>\n Save and invest toward a ratio, not a lump sum: Use a retirement calculator that lets you plug in your desired monthly income and automatically calculates the balance required.<\/p>\n Delay claiming Social Security: Each year you wait beyond full retirement age<\/a> boosts benefits by about 8%, raising the guaranteed slice of your ratio.<\/p>\n Shift tax buckets: Building Roth accounts means withdrawals will not raise your taxable income, lowering the gross replacement rate you need from savings.<\/p>\n Consider partial annuitization: Converting a slice of your assets into a lifetime annuity can \u201cbuy\u201d additional replacement income that you can’t outlive.<\/p>\n Reexamine your spending: The Bureau of Labor Statistics notes that most retirees spend 15% to 20% less on work-related costs but more on health care<\/a>. Trimming your housing costs or downsizing can tilt the ratio in your favor.<\/p>\n Your crucial retirement number isn\u2019t the balance of your 401(k). It\u2019s the percentage of pre\u2011retirement pay<\/a> that your total income sources will replace, after taxes.<\/p>\n Set a realistic goal (usually 70% to 85%), subtract expected Social Security, and you\u2019ll know precisely how much annual cash flow your nest egg needs to generate. With that target in hand, you can adjust your savings, invest more wisely, and choose a retirement age to help ensure your post\u2011paycheck years are as comfortable<\/a> as they are now.<\/p>\n