Meet Carol. She’s 68, lives in Columbus, Ohio, has a $340,000 portfolio, and spent years planning her retirement around a Social Security benefit she expected to be $2,100 a month. When her actual statement arrived in January 2025, the real number, after Medicare Part B premiums were deducted and IRMAA surcharges applied, was $1,694. Her grocery bill is up 22% since 2021. Her utility costs jumped again last winter. Her real purchasing power left her running roughly $400 short every single month.

Carol isn’t unusual. She’s the rule right now.

Have you actually looked at what your fixed expenses cost you last month, not what you budgeted, but what they actually cost? If you haven’t, stop reading and pull that number before you go any further. Everything else in this article depends on it.

Why Your Social Security Check Isn’t Going as Far as You Planned

The 2025 Cost-of-Living Adjustment came in at 2.5%, down from 8.7% in 2023 and 5.9% in 2022. On paper, that sounds reasonable. In practice, it’s a problem.

The COLA formula is tied to the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W), not the Consumer Price Index for the Elderly (CPI-E). According to a 2024 analysis by The Senior Citizens League, retirees have lost approximately 20% of their buying power since 2010 because the CPI-W consistently underweights healthcare and housing costs, which is exactly where seniors spend the most money.

Here is the number that matters: Medicare Part B premiums rose to $185 per month in 2025, up from $174.70 in 2024. That’s $121.20 in new annual deductions off the top of your benefit before you spend a dollar. For many retirees, the COLA raise and the premium increase nearly cancel each other out.

Most people get this wrong. They plan around the gross Social Security figure, not the net deposit. Big difference.

Warning: If your income crossed certain thresholds in 2022 or 2023, IRMAA surcharges may be reducing your Medicare premium further. Individual filers earning above $103,000 and joint filers above $206,000 in 2022 face additional deductions in 2025. Log into SSA.gov and verify your actual withholding right now.

The 5-Step Strategy to Stabilize Your Retirement Income

Step 1: Calculate Your Real Monthly Floor

Stop working from memory. Pull your last three months of bank statements and add up only the non-negotiable expenses: housing, utilities, food, insurance, and medications. That total is your floor.

Carol did this exercise and found her real floor was $2,094 per month. Her net Social Security deposit was $1,694. That left a $400 monthly gap she needed her portfolio to cover consistently, not occasionally.

With a $340,000 portfolio, a $400 monthly withdrawal represents a 1.4% annual draw rate. That’s sustainable. But only if she knows the number. If she’d kept estimating, she might have drawn $700 or $800 a month without realizing the excess.

Write your floor number down. Put it somewhere visible.

Step 2: Apply the Two-Bucket Portfolio Structure

Vanguard and Fidelity have backed this approach for years, and the reason is simple. People who panic-sell during a market downturn lock in losses they never recover from. The bucket system makes panic structurally harder.

Bucket one holds 12 to 24 months of your gap amount in cash or short-term Treasury bills. For Carol, that’s $4,800 to $9,600 sitting in a high-yield savings account or a 6-month T-bill ladder earning around 5.1% as of early 2025. This is the money she lives on. She doesn’t touch equities in a down market because she doesn’t need to.

Bucket two holds the rest of her portfolio in a diversified mix, approximately 60% equities and 40% bonds, with automatic rebalancing once a year.

If your portfolio dropped 20% tomorrow, what would you cut first, and have you written that down anywhere? If the answer is “I don’t know,” bucket one is what gives you time to think instead of panic.

Pro Tip: Treasury bills currently yield more than most money market funds with equal or lower risk. TreasuryDirect.gov lets you buy them directly with no fees. A 6-month T-bill for $10,000 at 5.1% earns roughly $255 before taxes. That’s real money sitting in your cash bucket.

Step 3: Recalculate Your Safe Withdrawal Rate Against Current Reality

The 4% rule was derived from a 1994 paper by financial planner William Bengen using 50-year historical data. A 2021 update from Morningstar’s research division lowered the suggested rate to 3.3% for new retirees, based on current valuations and lower projected bond returns.

For Carol’s $340,000 portfolio, 3.3% means $11,220 per year, or $935 per month available for withdrawal. That more than covers her $400 gap. But here’s the critical caveat: that rate assumes 30 years of longevity. If Carol lives to 95, she needs to hold that line.

Do the math on your own portfolio. Multiply your balance by 0.033. That’s your annual ceiling. Divide by 12. That’s your monthly ceiling. Compare it to your gap number.

Step 4: Audit Every Benefit and Deduction You’re Actually Receiving

I spent 15 years on Wall Street. This is what they never tell you. The average American retiree leaves $1,200 to $3,600 per year unclaimed in benefits, deductions, or forgotten accounts, according to a 2023 report from the National Bureau of Economic Research.

Start here. Are you claiming the medical expense deduction on your federal taxes? In 2025, you can deduct qualified medical expenses exceeding 7.5% of your adjusted gross income. A retiree with $40,000 AGI and $5,000 in medical costs can deduct $2,000. That’s real money.

Are you enrolled in your state’s property tax relief or utility assistance programs? The National Council on Aging’s BenefitsCheckUp tool (benefitscheckup.org) covers over 2,000 programs and takes about 10 minutes to run.

Full stop. Ten minutes. Run it.

Did You Know: Roughly 30% of eligible Medicare Savings Program beneficiaries never enroll, according to a 2022 CMS report. These programs can cover Part B premiums entirely for qualifying low-income beneficiaries, potentially returning $185 per month to your net income.

Step 5: Add One Reliable Income Stream Before Year-End

Social Security and portfolio withdrawals are two legs of a stool. Two legs fall over. What’s the third?

For Carol, it was renting her spare bedroom through a long-term lease arrangement, not short-term vacation rentals, which generates $550 a month and covers her entire gap with $150 left over. She found a grad student through her university’s off-campus housing board. No agency fees. No apps.

Other options with realistic numbers: a part-time consulting arrangement at 10 hours per week at $30 per hour generates $1,200 monthly. Selling digital versions of professional skills, a retired teacher tutoring online through Wyzant, for example, earns an average of $35 to $60 per hour according to the platform’s 2023 rate data. A dividend-focused ETF like VYM currently yields approximately 2.8%, meaning a $50,000 allocation generates roughly $1,400 per year in passive income.

What’s one income source you’ve been putting off that could realistically add $300 a month? Because $300 a month is $3,600 a year. Over a 20-year retirement, that’s $72,000 before any growth. The math is not complicated.

Action Step: Pick one option from Step 5. Set a calendar reminder for this Saturday to spend 45 minutes researching it. Not “someday.” This Saturday.

Your Next 3 Steps

Carol turned her $400 monthly shortfall into a $150 monthly surplus in under 90 days. Not by finding a miracle investment. By knowing her actual numbers, building a structure that kept her from panic decisions, and adding one income stream she’d been postponing.

You can do the same thing this week.

Step 1: Pull your last three months of bank statements tonight and total only your fixed, non-negotiable expenses. Write that number down. Then log into SSA.gov and find your actual net monthly deposit after all Medicare deductions. Subtract one from the other. That gap number is the only number you need to start from.

Step 2: Log back into SSA.gov and look specifically at your Medicare Part B withholding and any IRMAA surcharges listed. Then visit BenefitsCheckUp.org and run the 10-minute benefit eligibility screening for your state. Many retirees find $100 to $300 per month in programs they never knew existed. You are not too proud to claim what you paid into.

Step 3: Decide on one income source from Step 5 of this article and take one concrete action toward it before Sunday. Not research. An action. Send one email, make one call, or create one listing. Carol put up her room listing on a Tuesday night and had her first inquiry by Thursday morning. The longer you wait to add that third leg, the longer you’re standing on two.

Ed Webb spent 15 years as a fixed-income analyst on Wall Street before turning to personal finance writing. He writes the WolfTrend Finance column weekly.