Why Your Retirement Number Keeps Going Up (And It’s Not Your Fault)

Tax & Retirement Planning

Why Your Retirement Number Isn’t a Fixed Target

Most people pick a retirement number once — often from an article, a calculator, or a rough guess — and treat it as permanent. A common example: someone in their early thirties decides that $1,000,000 will comfortably fund their retirement, based on the cost of living they know today.

The problem is that the number was never really $1,000,000. It was $1,000,000 in today’s dollars, for a retirement that’s still 20 or 30 years away. Prices don’t hold still for two or three decades. By the time that person actually retires, the same lifestyle can cost significantly more — not because they changed their plans, but because the cost of everything around them changed instead.

This is the core idea behind a moving retirement number: the target isn’t wrong when it’s set, it’s incomplete. It’s missing a built-in adjustment for how much prices are likely to rise between now and retirement day.

How Inflation Quietly Erodes a Retirement Plan

Inflation is easy to underestimate because it rarely shows up as one dramatic event. There’s no single day where groceries, healthcare, insurance, and housing all jump at once. Instead, prices drift upward a little at a time — a few percent most years — until, a decade or two later, the total shift is impossible to ignore.

A useful way to think about it: imagine a $100 bill sitting untouched in a drawer for 20 years. The bill still says $100. But what it can actually buy has shrunk, often by a third or more, depending on the inflation rate over that period. Retirement savings work exactly the same way. The account balance can look healthy and still lose real-world purchasing power if growth doesn’t outpace inflation.

The Cost of Setting a Plan and Forgetting It

The most common mistake isn’t picking the wrong number — it’s picking a number once and never revisiting it. A retirement plan built at age 32 using that year’s cost of living, healthcare estimates, and lifestyle assumptions will drift out of date if it’s never checked again before age 55 or 60.

This is different from panicking over short-term market swings. A retirement account can grow steadily every year and still fall behind if the target itself was never adjusted for rising prices, higher healthcare costs, or lifestyle changes. The plan doesn’t fail because the investments underperformed — it fails because the finish line moved and nobody noticed.

How to Adjust Your Retirement Number the Right Way

Correcting for inflation doesn’t require starting over. It requires a small number of consistent habits, applied over a long period of time.

• Review the plan annually. Once a year, revisit the target number using current cost-of-living and healthcare estimates rather than the figures used when the plan was first created.
• Increase contributions gradually. A small, steady increase in the monthly contribution amount — even 1–2% more per year — can offset a meaningful amount of inflation drag over decades.
• Redirect part of every raise. Instead of letting a raise fully absorb into higher spending, direct a portion of it toward retirement contributions so the plan grows in step with income.
• Include healthcare separately. Healthcare costs tend to rise faster than general inflation, so they deserve their own line item in a retirement estimate rather than being folded into general living expenses.
• Use a real inflation assumption. Projections that assume 0% inflation will always understate the true number needed. A conservative 2–4% annual assumption is a more realistic planning baseline.

Table shows what an original $1,000,000 target becomes once adjusted for inflation, at three different long-run inflation assumptions. Figures are illustrative, rounded, and for educational purposes only.

Small Habits That Keep a Retirement Plan on Track

None of the corrections above are dramatic. That’s the point. Retirement plans rarely fail because of one bad decision — they fail because small, quiet drift is never corrected over a long stretch of time. A plan that’s checked once a year, with contributions that rise gradually alongside income and prices, tends to stay realistic without requiring major last-minute changes.

Inflation itself can’t be controlled. What can be controlled is how often the plan is reviewed, how consistently contributions increase, and whether the retirement number reflects today’s reality rather than a figure calculated a decade ago.