Capital-Gains Inflation Tax Hits 51% Effective Rate, Laffer Says

The effective tax rate on real capital gains has climbed to 51 percent since the 2021 inflation surge, up from about 30 percent in the late 2010s.

The effective tax rate on real capital gains has climbed to 51 percent since the 2021 inflation surge, up from about 30 percent in the late 2010s, according to updated calculations by economist Arthur Laffer cited in a Wall Street Journal editorial.

"The fix is to let taxpayers 'step up' their tax basis in line with inflation," the WSJ Editorial Board wrote in an opinion piece published Monday, framing the change as a political opening for Republicans otherwise struggling to connect with midterm voters on the economy.

The statutory tax on long-term capital gains tops out at 23.8 percent, including the ObamaCare surcharge, and applies to nominal gains unadjusted for inflation. Laffer's scenario assumes an asset held for five years earning a 5 percent inflation-adjusted annual return. The current 51 percent effective rate remains below the peak of nearly 130 percent in the 1970s, but the line has moved in the wrong direction after several decades of low inflation.

The change would help the middle class: about 74 percent of returns that filed a capital gain in 2022 had household incomes below $200,000, according to IRS data parsed by Americans for Tax Reform. Profits on selling a home are taxed as capital gains, and though there's an exclusion for the first $250,000, or $500,000 per couple, empty nesters after the Biden-era inflation might be above that threshold.

The proposal arrives as Republicans weigh their final major legislative window this year. Income-tax brackets are already indexed to inflation, leaving capital gains to suffer what the board called an "unjust inflation tax" — a dynamic in which government policies that fed the price increases of the past five years now inflate tax revenue. Capital-gains tax cuts have a record of stimulating investment and economic growth, the board argued, contrasting optimism about rising tides with the Democratic turn toward punitive income and wealth taxes.

A 51% Effective Rate Weighs on Home Sellers

The burden falls hardest on homeowners and long-term investors whose nominal gains outpace real returns. Under current rules, a taxpayer who buys an asset for $100,000 and sells it five years later for $150,000 pays tax on the full $50,000 gain, even if inflation accounted for a large share of that increase. Indexing the basis would let the taxpayer deduct the inflation-adjusted portion, taxing only the real gain. The board noted that profits on home sales are taxed as capital gains, and the $250,000 single exclusion — $500,000 for couples — may no longer shield empty nesters who bought before the recent price surge. For a middle-class household, the difference between a 51 percent and a 30 percent effective rate on real gains is material to retirement and relocation decisions.

Economists have long understood the distortion: nominal-based taxation punishes savers when inflation runs hot, a lesson the board said earlier generations of policymakers absorbed during the low-inflation decades. The 1970s peak of nearly 130 percent, the board wrote, helps explain the economic dysfunctions of that era, when high inflation combined with nominal-based taxation to erode real returns.

Whether Republicans include the measure depends on the legislative calendar and competing priorities in the final push this year. If adopted, indexing would lower the effective tax rate on real capital gains back toward the roughly 30 percent level of the late 2010s, potentially freeing capital for reinvestment. If it stalls, the inflation tax on investors and homeowners persists into the next cycle, leaving middle-class taxpayers to absorb the cost of policy-driven price increases.

This article is for informational purposes only and does not constitute investment advice.