America’s Famous 106% Debt-to-GDP Number Is Wrong

From a historical perspective, America's current debt problem is much worse than it appears. Current debt/GDP figures are often put in the context of the claimed historical peak: "U.S. federal debt/GDP reached 106%" after World War II. However, wartime GDP was valued at government-controlled prices, which makes the denominator smaller and the World War II peak look larger. Using arguably the best academic estimate of the prices that would have prevailed without price controls produces a World War II peak closer to 86%. After price controls were lifted, annual inflation ran at 12% for several years. That is a main reason that the conventional series drops so rapidly in 1947 and 1948. 

Sources: FRED; Evans (1982)

The ubiquitos 106% debt/GDP figue 

The Congressional Budget Office describes 106% of GDP in 1946 as the previous record for federal debt held by the public. In its 2026 budget outlook, CBO projects debt at roughly 101% of GDP in 2026 and says it will soon surpass the World War II record. Financial media are filled with the same comparison. The Wall Street Journal, for example, recently wrote:

The historical series is here:  Federal Reserve Bank of St. Louis and it includes the 106.3% figure for 1946.  The difference is important between the stated and adjusted values is significant. The conventional series peaks at 106.3%. The Evans-adjusted series peaks at about 86.0%. In 1945, the difference is even larger: 103.2% conventionally versus about 75.2% after the price adjustment.

If this adjustment is even approximately correct, today's debt burden is not "almost as high as World War II." It is already a lot higher.

Why price controls impact the calculation

Nominal GDP is the dollar value of final goods and services in the country. It is equal to price times quantity. That makes the denominator in debt/GDP highly sensitive to the prices used to value goods and services.

Most of the time, calculating GDP as price times quantity is accurate. Market prices move, sometimes a lot (see, for example, the inflation created during Jerome's Powell time as Fed chair), but high and rising prices are still prices. World War II was different. The federal government imposed broad price controls, rationing, wage controls, production restrictions (and a huge bureaucracy). 

There were many distortions in macro-statistics during World War II. Robert Higgs argues, in a 1992 Journal of Economic History article,  that because the US was a command economy from 1942 to 1946, important macroeconomic measures were wrong. However, the total debt is, and was, easy to calculate so the numerator of the Debt/GDP is likely accurate. 

Some details of Evans' analysis 

The paper used in this analysis is Paul Evans, "The Effects of General Price Controls in the United States during World War II," Journal of Political Economy in 1982. Evans estimates a general-equilibrium model of suppressed inflation using quarterly U.S. data. 

The price distortion from government control is limited to a few years during and after WWII.  The price controls began early in 1942, but Evans reports no significant impact on prices until the fourth quarter of 1942. Most price controls were removed during 1946. In Evans's paper, the price-suppression increases during the war and returns to zero by the second quarter of 1948:

Evans' key result is that, at the wartime maximum, price controls reduced the price level by at least 30.4%, resulting in the famous, but wrong 106% Debt/GDP figure.