NEW HAVEN, Conn.— Rising federal deficits could increase borrowing costs for American households and reduce purchasing power over time, according to a new analysis from the The Budget Lab at Yale University, which shows just how much deficits add to the cost of a mortgage, for instance.
The report finds that higher government deficits and debt tend to push interest rates higher across the economy, raising the cost of mortgages, auto loans and small-business borrowing while reducing household purchasing power.
Researchers estimate that a permanent increase in federal deficits equal to 1% of gross domestic product could reduce household purchasing power by roughly $300 to $1,250 per household as borrowing costs and price pressures rise.
The mechanism is straightforward, the Yale economists say. As federal debt grows, the government must issue more bonds to finance it. That increased supply of debt can push interest rates higher as investors demand higher returns, while the Federal Reserve may also raise rates to counter inflationary pressures tied to deficit spending, the report states.
Deficits & Mortgages
According to the Budget Lab’s modeling, increases in federal deficits could raise the cost of common household loans, including mortgages and auto financing. For example, researchers estimate a typical 30-year mortgage could eventually carry significantly higher rates as federal debt rises, translating into thousands of dollars more per year in payments for homeowners over time, according to the Yale researchers.
Auto loans and small-business loans would also become more expensive, adding to financing costs for consumers and entrepreneurs, the report found.
Beyond direct borrowing costs, economists say larger deficits can affect the broader economy by crowding out private investment. As the government competes for capital, businesses may face higher financing costs, potentially slowing investment and economic growth over the long run.
Higher deficits can also influence inflation and interest-rate policy. Fiscal stimulus tied to deficit spending can create upward pressure on prices, prompting tighter monetary policy that further raises borrowing costs for households.
Gradual Accumulation
The Budget Lab said these dynamics mean the long-term impact of deficits extends beyond government finances and can directly affect household budgets through higher loan payments, reduced purchasing power and slower economic growth.
Researchers emphasized that the effects accumulate gradually as debt rises relative to the size of the economy, meaning the cost to households becomes more pronounced over time if deficits persist at elevated levels.
