Cash isn't behaving like a safe harbor anymore. Even modest inflation eats at take-home pay and retirement plans.

Why small inflation still matters

The Consumer Price Index rose 2.7% year over year in December, and on the surface that number looks tame. After several years of elevated inflation, even a modest annual rise builds on earlier price increases and raises costs over time. Costs that climbed quickly before don't fall back. And that means a paycheck that paid last year's bills buys less today.

That erosion is especially acute for people who swap steady earned income for withdrawals from savings. Paychecks arrive on a schedule; bills keep coming regardless, so timing mismatches can quickly create shortfalls. When inflation nudges up prices each year, the gap between what households bring in and what they must spend slowly widens.

The income gap many retirees don't plan for

Retirement planning often centers on account balances: how much you need to accumulate. But income — money that shows up reliably — is what actually pays a mortgage, groceries and medical bills.

Many people retire with sizable account balances but without a steady, predictable income stream to cover monthly expenses. Someone with a large nest egg but no predictable, inflation-adjusted income can feel more pressure than a person with a smaller portfolio and steady payouts.

Healthcare costs, taxes on withdrawals and unpredictable one-time medical events can push retirees to tap savings faster than they expect.

If you pull money out when markets are down, you lock in losses — and that permanently shrinks the pile left to recover later. The result: less money left to ride out future inflation or market swings.

How to make assets behave more like a paycheck

Maurie Backman, personal finance columnist at The Motley Fool, urges people not to reflexively move into cash when they stop working. Keeping money in cash protects the dollar amount but not its buying power — inflation slowly eats away at what those dollars will buy.

Instead, Backman recommends designing a retirement portfolio that still produces income. Options include a mix of bonds, dividend-paying stocks and real estate investment trusts. Those assets can generate more regular cash flow than sitting in a checking account. The idea: create predictable receipts that replace the paycheck, and let growth and income help keep up with rising costs.

You have to trade off risk and return: bonds tend to give steadier checks but often don't outpace inflation. Stocks and REITs tend to offer higher yields and potential growth, but with more volatility. The trade-off is one retirees must plan for — not something to decide in the heat of a market drop.

Delay Social Security — the math matters

Another lever many retirees can pull is the timing of Social Security benefits. Social Security rules allow a claimant to increase their monthly benefit by roughly 8% for each year they delay filing past full retirement age until age 70. That boost compounds because future cost-of-living adjustments, when applied, are calculated on a higher base benefit.

That increase can meaningfully shift retirement cash flow. For someone who can afford to wait, the larger permanent check reduces reliance on portfolio withdrawals early in retirement. Fewer early withdrawals lower the risk of locking in losses during market downturns. And, over the long run, a higher guaranteed payment can act as a partial inflation hedge since COLAs apply to a larger number.

Healthcare and taxes widen the shortfall

Healthcare is a common blind spot in retirement budgets. Even after Medicare kicks in, premiums, prescription costs and services not covered by Medicare often rise. Those expenses can climb unpredictably with age, forcing retirees to pull more from savings when they had planned for flat expenses.

Taxes add another layer. Withdrawals from tax-deferred accounts trigger income tax. That tax bite effectively raises the amount retirees must withdraw to meet the same after-tax spending needs. The interaction of withdrawals, tax brackets and Medicare premium surcharges can create unpleasant surprises for people who planned only for nominal withdrawal rates.

Practical steps workers and retirees can take

First, stress-test income plans for multiple inflation scenarios. A small annual CPI number still compounds, so model how different withdrawal amounts behave over a decade or more.

Second, aim to build a mix of income sources. That can include a ladder of short- to intermediate-term bonds or certificates of deposit timed to mature when you expect to need cash, dividend stocks for supplemental income, and, where suitable, rental property or REITs that pay quarterly distributions.

Think about keeping the money flowing month to month, not just the size of the balance; for example, an annuity can turn part of your savings into a steady check. They aren't right for everyone, but when used selectively they can reduce the stress of managing withdrawals and help cover baseline spending.

Fourth, revisit Social Security timing. For many households, delaying benefits boosts guaranteed income enough to reduce portfolio stress. For others — those with serious health issues or pressing caregiving needs — the calculus is different.

What younger workers should do now

Workers still earning a paycheck can take steps to reduce future vulnerability. Prioritize retirement accounts while you have steady wages, and keep some assets in vehicles that can generate income later. Don't assume you'll convert everything into cash at retirement; that choice corrodes buying power.

Also, plan for healthcare costs early. Employer plans, health savings accounts and long-term care considerations affect how much you'll need later. The less you must pull from retirement savings to cover health shocks, the more those accounts can compound and outpace inflation.

The role of small inflation in a long retirement

Modest inflation rates are invisible month to month. Over decades, they add up. A few percentage points a year quietly shrink what fixed dollars can buy. That slow creep is what turns a balanced retirement plan into a scramble if income isn't planned for.

Designing retirement around predictable, inflation-aware income is uncomfortable work. It forces people to trade the psychological comfort of a large balance for the practical benefit of steady receipts. But it's that steady receipt that replaces the paycheck's role and pays the bills when wages stop.

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The Consumer Price Index rose 2.7% year over year in December.