Most people chase a magic number for retirement and end up frustrated. There is a better way. Start with income, not a portfolio balance. I am Taylor Sohns, CEO of LifeGoal Wealth Advisors, a Certified Investment Management Analyst (CIMA), and a Certified Financial Planner (CFP). Over the years, I have seen that a simple, steady process beats guesswork. The goal is to turn savings into reliable paychecks so you can live the life you want.
Flip the problem. Do not ask, “What balance do I need?” Ask, “What income will I need each year to live well?”
The Four-Step Framework
Here is the clean, repeatable method I use to size a retirement plan. It is simple math, but it works because it starts with your life.
- Step 1: Decide how much income you will need each year in retirement.
- Step 2: Check your guaranteed income, such as Social Security.
- Step 3: Subtract guaranteed income from the income you need.
- Step 4: Divide the gap by 4% to estimate the savings required.
This gives you a target that lines up with your spending, not someone else’s guess. It also shows which levers you can pull to reach your goal.
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Start With Spending You Can Live With
Begin with your desired annual spending. Keep it real and grounded in your current life. Most households spend about the same after they stop working as they did before. Some costs go down, like commuting. Others go up, like travel or health care. Your number should reflect your lifestyle, not a fantasy budget.
My rule: track three to six months of spending now. Trim unusual one-time items. Then annualize what is left. Add a cushion for travel, hobbies, and gifts. If you carry a mortgage, decide whether you will pay it off before or during retirement. That choice changes cash needs.
Verify Guaranteed Income
Once you know your target spending, list every source of income you cannot outlive. The most common is Social Security. Create or log in to your account at ssa.gov and note your estimated benefit at different claim ages. Waiting from age 62 to 70 can raise your monthly check by a large margin. Pensions and annuities, if you have them, also count as guaranteed income.
Include any part-time work you expect to do by choice. Be honest about how long you plan to work and at what pay. If it is uncertain, exclude it from your base plan and treat it as a bonus.
Do the Math With the 4 Percent Rule
Now do the gap math. Suppose you want $100,000 per year to live well. Your Social Security benefit is estimated at $25,000 per year. The gap is $75,000.
Use the 4 percent rule of thumb to translate that gap into a savings target. Divide the $75,000 gap by 0.04. The result is $1,875,000. That is the portfolio size that, historically, has supported a $75,000 annual draw, adjusted for inflation, across long periods of time.
The “4% rule” is a guide. It points to a sustainable withdrawal rate across many market cycles, not a promise in every scenario.
Think of it as a starting point. After you run the math, refine it for your situation, taxes, and risk comfort.
Stress-Test the Rule of Thumb
The 4 percent guide is helpful, but life adds real-world details. I account for several factors before locking in a plan.
Inflation: Your spending will rise over time. Use a long-term assumption like 2–3 percent a year. Health care often rises faster. Build that into your plan so the math works in year one and year fifteen.
Taxes: Your withdrawal is not the same as your after-tax spending. If most savings are in pre-tax accounts, you will owe income tax on distributions — and annuity holders face their own rules, so review this comprehensive guide to annuity taxation. Roth accounts are tax-free if rules are met. A simple way to adjust is to add a tax cushion to your target spending or lower the withdrawal rate by a small margin.
Longevity: Plan for a long life. Many retirees live into their 90s. A longer horizon supports a slightly lower withdrawal rate or a bigger savings cushion.
Market swings: Early losses can strain a plan if you draw too much during a downturn. This is called sequence risk. A cash buffer and flexible withdrawals can help protect your nest egg when markets drop.
Fees and costs: Investment costs, fund expenses, and advice fees reduce returns. Keep costs fair and transparent. Small percentages add up over decades.
Tailor the Plan Using Simple Levers
You have control over many inputs. Adjust them to close the gap or add safety.
Spend a bit less: Trimming 5–10 percent from your annual target can shave hundreds of thousands from the required balance. Cut low-value expenses first.
Work a bit longer: One or two more years of work adds savings, shortens the draw period, and boosts Social Security. That three-way effect is powerful. For those who got a late start, here are steps to build wealth fast when you got a late start on retirement.
Claim Social Security later: Delaying from 67 to 70 increases benefits each year. Higher guaranteed income reduces how much you must pull from your portfolio.
Consider partial annuitization: A low-cost immediate annuity can turn a slice of savings into lifetime income. It is not for everyone, but it can raise your floor of safety — and here is a closer look at why annuities may be better than equities for certain retirees.
Use home equity carefully: Downsizing or a standby line of credit in later years can add flexibility. Treat housing decisions as part of the plan, not an afterthought.
Walkthrough: From Spending to Target
Here is the same example with more detail, so you can see how the pieces fit.
Desired annual spending: $100,000. Estimated Social Security at your planned claim age: $25,000. Your annual gap is $75,000.
Divide $75,000 by 0.04. Your target is $1,875,000. That supports a first-year draw of $75,000. Each year after, you adjust that $75,000 for inflation.
Now, test a few tweaks:
If you cut spending to $90,000: The gap becomes $65,000. Divide by 0.04, and the target falls to $1,625,000. That $10,000 cut saves you $250,000 in needed savings.
If you delay Social Security and raise it to $35,000: With $100,000 spending, the gap is $65,000. Again, you would need $1,625,000, even without changing your lifestyle.
If you prefer a safer 3.5% withdrawal rate: With a $75,000 gap, divide by 0.035. The target becomes about $2,143,000. Safety costs more, but it buys peace of mind.
How to Adjust Year by Year
A plan is not a one-time set-and-forget task. I encourage a simple annual check-in:
Recalculate your spending: Update your actual spending and adjust for the next year. Keep your plan focused on real life.
Inflation adjust carefully: Do not increase spending if markets had a very poor year and inflation was high. Tighten for a year if needed. Many retirees do this without feeling deprived.
Use guardrails: Set a maximum and minimum withdrawal as a percent of your portfolio. If your balance falls below a trigger, trim spending. If it rises, give yourself a raise.
Refill your cash bucket: Keep 6–12 months of withdrawals in cash. Refill it in strong markets. Let it draw down in weak ones. This reduces selling pressure at bad times.
Building a Portfolio That Pays You Reliably
Your investments should support steady income and growth to beat inflation. I like simple, low-cost building blocks.
Stocks for growth: Broad market funds provide long-term growth. They help your income keep up with rising prices over decades.
Bonds for stability: High-quality bonds and cash fund near-term withdrawals and cushion downturns. Align their maturities with your cash needs.
Cash bucket for one year: Hold enough for the next 6–12 months of spending. It smooths your paychecks through rough markets.
Rebalancing plan: Set rules to sell a bit of what did well and buy what lagged. Do this on a set schedule, not by gut feeling.
Tax-smart location: Place income-heavy holdings in tax-deferred accounts when possible. Keep tax-efficient funds in taxable accounts. Roth accounts are great for growth or later-life flexibility.
Common Mistakes That Hurt Retirees
Chasing yield: A very high dividend can be a red flag. Focus on total return and a sound plan, not a tempting payout.
Too much cash for too long: Cash feels safe but loses ground to inflation. Keep the right amount, then invest the rest.
No plan for taxes: Large required minimum distributions can surprise you later. Start Roth conversions early if they fit your situation. Spread taxes across many years.
Ignoring sequence risk: Big withdrawals during a market slump can do lasting harm. Use a cash buffer and flexible rules to protect your balance.
Not adjusting: Life changes. Markets change. A short annual review helps keep your plan on track without drama.
Key Points at a Glance
- Start with your desired income, not a target portfolio number.
- Subtract guaranteed income like Social Security to find your gap.
- Divide the gap by 4% to estimate the savings you need.
- Refine for inflation, taxes, longevity, and market swings.
- Use guardrails and a cash buffer to steady withdrawals.
Putting It All Together
This four-step method turns a vague dream into clear numbers. It links your lifestyle to your savings target and shows the exact levers you can pull. Spend a bit less, work a bit longer, claim Social Security later, or draw at a slightly lower rate. Each choice moves the math in your favor.
I have watched this process calm nerves and build confidence. The math is simple. The execution is steady. You do not need a perfect forecast. You need a plan that you can live with and adjust once a year. That is how retirement moves from guesswork to a paycheck you control.
Frequently Asked Questions
Q: How do I estimate my Social Security benefit accurately?
Create an account at ssa.gov and review your earnings record. Check projected benefits at different claim ages. Update it yearly to capture new earnings and refine your plan.
Q: What if the 4 percent rule feels too aggressive for me?
Use a lower rate, like 3.5% or 3%. That raises the savings target but adds a margin of safety. You can also combine a lower rate with delayed Social Security.
Q: How much cash should I hold once I retire?
Keep 6–12 months of planned withdrawals in cash. Refill it during strong markets. Avoid holding several years in cash, as inflation can erode its value over time.
