Latest / The Emergency Fund Podcast with Fexingo: Cash Reserves, Saving, and Financial Cushion / Emergency Fund Inflation How Shrinking Purchasing Power Changes Your Cash Reserve Target
Transcript
- Lucas: Let's start with a number. If you built a three-month emergency fund in early 2021 and parked it in a typical savings account earning 0.5 percent, by the end of 2024 that cash had lost roughly twelve percent of its purchasing power to inflation. Luna: Ouch. So that three-month fund is really only covering about two-point-six months of expenses now. Lucas: Exactly. And most personal finance advice never accounts for this. We're told 'save three to six months of expenses' as if that number is permanent. But if your expenses inflate and your cash doesn't grow, the gap widens every year. Luna: So the fund itself needs to be a moving target. But how do you even calculate that without redoing your budget every quarter? Lucas: Let's walk through a concrete example. Say your monthly essentials — rent, groceries, utilities, insurance, minimum debt payments — total four thousand dollars. A three-month fund is twelve thousand. In 2021, twelve thousand bought you three months of that exact basket of goods. Lucas: Fast forward to today, May 2026. Cumulative inflation since early 2021 is roughly eighteen percent, depending on which CPI measure you use. That same basket of goods now costs about four thousand seven hundred twenty dollars per month. Your twelve thousand dollar fund now covers only two-point-five months. Luna: Right, because the cash didn't grow, but the prices did. So to maintain three months of coverage today, you'd need over fourteen thousand dollars. Lucas: Fourteen thousand one hundred sixty, to be precise. That's a two-thousand-dollar gap just from inflation. And if you never adjusted your target, you're effectively running a smaller emergency fund than you think. Luna: What's interesting is that this cuts hardest for people who built their fund during the low-inflation 2010s. Someone who set a six-month fund in 2015 and never touched it — that fund might only cover four months now. Lucas: Exactly. And the risk isn't just theoretical. If you actually need to tap that fund during a job loss or a medical emergency, you'll discover the shortfall at the worst possible moment. You might have to pull from retirement accounts or take on high-interest debt. Luna: So what's the fix? Should we just inflate the target by the cumulative CPI every year? Or is there a smarter way to hold the cash so it at least keeps up? Lucas: There are two pieces. First, the target number should be revisited annually. I'd recommend using the trailing twelve-month CPI figure — it's released monthly by the Bureau of Labor Statistics. January is a good time to recalculate: take your monthly essentials, multiply by three or six, then multiply by one plus the prior year's inflation rate. Lucas: Second piece: where you hold the cash matters. A standard savings account paying zero-point-five percent is guaranteed to lose purchasing power. A high-yield savings account paying four percent will roughly keep pace with inflation over time, though there's a lag. Luna: But even high-yield savings have been volatile. In 2022, rates went from near zero to over four percent, but inflation was running at nine percent. You were still losing ground. Lucas: True. So some people use a ladder of short-term Treasury bills, which have yielded more than savings accounts recently. T-bills are state tax exempt, and you can buy them in three-month, six-month, or one-year maturities directly from TreasuryDirect or through an ETF like SGOV. Luna: I've done that myself. I keep two months of my emergency fund in a high-yield savings account for immediate access, and four months in a rolling ladder of three-month T-bills. That way the bulk of my cash is earning around four point five percent, state-tax-free. Lucas: That's a smart structure. The key insight is that your emergency fund isn't just a number — it's a purchasing-power target. If you treat it like a static pile of cash, inflation eats it silently. But if you adjust the target annually and hold the cash in instruments that at least track inflation, you preserve your real coverage. Luna: One question though: what if inflation drops back to two percent? Do we still need to adjust? I mean, the erosion is slower, but it's still erosion. Lucas: Even at two percent, a three-month fund loses about six percent of its purchasing power over three years. That's not catastrophic, but it's real. I'd still recommend an annual check-in. It takes five minutes: look up the latest CPI number, multiply, adjust your savings target, move cash if needed. Luna: If today was actually useful to you, the way this stays ad-free is listener support. Buy me a coffee dot com slash fexingo. That's all we'll say about it. Lucas: And we mean it — no ads, no sponsors, just a link if you want to help keep the conversation going. Alright, back to the math. Let's talk about what happens when you actually need to use this inflation-adjusted fund during a crisis. Luna: Because timing matters. If you have to draw down your fund during a period of high inflation, you're pulling out cash that's already lost value, and the remaining balance covers even less. Lucas: Exactly. Say you lose your job in a high-inflation year. Your monthly expenses have risen, but your fund hasn't kept pace. You might deplete it faster than planned, and then you're scrambling. That's why the annual adjustment isn't just academic — it's a real risk hedge. Luna: So the rule of thumb I'm taking away: once a year, take your monthly essential expenses, multiply by your target months, then multiply by one plus the prior year's CPI. That's your new target. And consider holding part in T-bills or a high-yield savings account. Lucas: One last nuance: if you have an irregular income — freelancers, commission-based workers, small business owners — this inflation effect is even more pronounced because your expenses are more volatile. For them, I'd recommend checking the target twice a year. Luna: Good point. So the takeaway: your emergency fund is a living number, not a one-and-done target. Inflation is the silent thief, and the only defense is to index your target to reality. Lucas: And keep it somewhere that at least tries to keep up. Next time, we'll talk about how to mentally separate your emergency fund from your 'just in case' savings — and why that distinction matters more than you think.