• Opher Ganel

Will Inflation Derail Your Retirement Plans?

In the mid-1950s, my parents bought their first house using a fixed-rate 15-year mortgage. The payments were exorbitant – almost half of my dad’s take-home pay. By the time they paid off the loan in the late 1960s, the same payment cost only as much as a nice dinner out for the family!

How did that happen, and what can that “ancient history” teach you that can save your retirement plan?

The Insidious Effects of Inflation


If you’ve read much about retirement planning, you know that the earlier you start setting money aside and investing for retirement, the better. That’s because your investment returns compound over time. However, investment returns aren’t the only things that compound over time. Inflation does too, and not to our benefit.

40 Years of Inflation in Retirement
How 40 years of inflation from 1978 to 2018 decimated the purchasing power of $1M

As you can see above, if you took $1 million in 1978 and stashed it under a mattress, 40 years later that million would buy less than $300,000 worth of goods as measured in 1978 dollars.

That’s an extraordinary loss of more than 70% of purchasing power over 40 years! What might shock you even more, inflation averaged just a bit over 3% per year over that 40-year period! That’s how insidious inflation can be.

But it could actually be much worse. Had you started that 40-year period just a decade earlier, in 1968, as seen below, you would have lost over 83% of your purchasing power!

40 Years of Inflation Impact
How much worse the impact of 40 years of inflation was from 1968 to 2008

Even the Banks Usually Don’t Get This Right


As my parents’ story demonstrates, their lender didn’t account for inflation in the terms of their loan. That’s how their payment went from almost half of a monthly salary to barely the cost of a restaurant meal for five.

Similarly, if you happened to take out a 30-year fixed mortgage around the summer of 2016, you might have scored an annual interest rate of under 3.5%. If inflation goes back to its long-term average, your inflation-adjusted interest could be nearly 0%, and the investors who bought your loan might actually lose money!

How to Beat Inflation with Your Personal Retirement Planning


Neither you nor I have any control over inflation (even the Fed has a hard time managing that!). The only thing we can do is account for it in our planning. If you expect to retire in 40 years, make a retirement budget in today’s dollars, but then multiply it by 1.03^X (that’s 1.03 to the power of X), where X is how many years you have before you retire. Finally, to get from this projected-inflation-corrected budget to your nest egg target, multiply it by 25 (per the famous “4% rule”).

For example, if your retirement budget is $50,000 in today’s dollars, you should plan on building a nest egg that’s 25 times that amount, or $1,250,000 in today’s dollars. However, if retirement is 40 years away and inflation averages about the same 3% as it did over the past century, you’d need $50,000 × 25 × 1.03^40 or just under $4.1M, counting in the dollars of the year you’ll retire.

That looks super daunting, doesn’t it? However, with the nominal historic return of the stock market at ~10% per year, investing just over $8,000 a year in stocks (and increasing that contribution by the rate of inflation each year) for 40 years will get you there.

If you consider that even with its problems, Social Security will probably pay out about 80% of your promised benefits, an inflation-adjusted $6,000 annual retirement set-aside just might be enough to do the job.


The Bottom Line of Accounting for Inflation


If your retirement plan fails to account for inflation, you might think that you need a lot less than what you will actually need. This could completely derail your retirement, requiring you to drastically decrease your spending, or risk running out of money before you run out of lifetime.

If you hire a financial planner to help you craft a retirement plan, ask them what inflation numbers they’re assuming, and what you could realistically expect to spend in today’s dollars from the nest egg they project for you.


Disclaimer: This article is intended for informational purposes only, and should not be considered financial advice. Before making major financial decisions, please speak with us or another qualified professional for guidance. The original version of this article first appeared on Wealthtender written by Opher Ganel.

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