The Costs of Inflation and Who It Hits

A loan is a promise written in dollars, not in purchasing power. When a lender and borrower agree on a fixed interest rate, they're both betting on what inflation will be. If inflation comes in higher than expected, the dollars the borrower pays back are worth less than either side thought, so the borrower wins and the lender loses. If inflation comes in lower than expected, the reverse happens. This is why unexpected inflation redistributes wealth instead of just shrinking everyone's slice equally: some people hold fixed-dollar obligations (debts, pensions, long-term wages), and inflation changes what those fixed dollars can buy.

This is also why inflation doesn't make everyone poorer at the same time. A homeowner with a 30-year fixed mortgage benefits from surprise inflation because their payment stays the same while their wages (hopefully) rise with prices. A retiree on a fixed pension gets hurt because that pension buys less every year inflation runs. Workers whose wages are flexible or indexed can keep pace; those locked into old contracts cannot. Inflation is a transfer, not a uniform tax.

Beyond redistribution, inflation imposes real costs on the whole economy. Menu costs are the resources firms spend to actually change posted prices: reprinting menus, relabeling shelves, updating websites. Shoe leather costs are the time and effort people spend minimizing cash holdings, making more trips to the bank or shifting money into interest-bearing accounts, because holding cash loses value fast. At moderate inflation these costs are small annoyances. At extreme inflation, like prices rising 50 percent a month, they explode: firms reprice constantly, workers get paid daily and spend immediately, and the economy wastes real effort just adjusting to money losing value in real time.