Thomas Peterffy's Net Worth Inflation-Adjusted

Thomas Peterffy, a Hungarian-born American billionaire, is the founder and chairman of Interactive Brokers, a pioneering electronic brokerage firm known for its low-cost trading and advanced technology.

Most news sources and publications report his wealth based on its value at the time of publication. On this page, those historical figures are recalculated to reflect their value in today’s dollars using the US Consumer Price Index (CPI). This approach provides a clearer picture of how the true purchasing power of his estimated net worth has changed over time.

Explore the chart and data below to visualize the difference between reported wealth and its inflation-adjusted equivalent over time. Adjusted values use September 2025 dollars as the baseline.

Key Takeaways

Since 2010, Thomas Peterffy's net worth has grown at a Compound Annual Growth Rate (CAGR) of 28.08%, equivalent to 24.72% after accounting for inflation.
His best year has been 2012, with a net worth growth of 277.89% after accounting for inflation.
In the last 5 years, his nominal net worth increased by 32.3 billion, a total gain of 129.2% (91.21% inflation-adjusted).

Thomas Peterffy Net Worth by Year (2010-2025)

The table below provides the estimated inflation-adjusted net worth and its year-over-year percentage change.

Year	Inflation-adjusted Net Worth	Change (%)
2025	$57.3 billion	62.76%
2024	$35.2 billion	30.54%
2023	$27 billion	20.89%
2022	$22.3 billion	-25.56%
2021	$30 billion	66.98%
2020	$17.9 billion	-17.39%
2019	$21.7 billion	-17.26%
2018	$26.3 billion	43.59%
2017	$18.3 billion	21.73%
2016	$15 billion	0.57%
2015	$14.9 billion	23.72%
2014	$12.1 billion	73.19%
2013	$7 billion	-8.74%
2012	$7.6 billion	277.89%
2011	$2 billion	-3.06%
2010	$2.1 billion	-

Building a Fortune with Interactive Brokers

Thomas Peterffy is a self-made billionaire who revolutionized financial markets by pioneering automated, low-cost trading. His company, Interactive Brokers (IBKR), was built on a foundation of technological efficiency, creating a highly profitable business model with unique characteristics for navigating inflationary environments.

Technological Disruption: Peterffy was one of the first to apply computing power to trading, developing some of the earliest automated trading systems. This relentless focus on automation created an extremely low-cost operational structure, making the firm resilient to rising operational costs during inflationary periods.
A Low-Cost Global Platform: He founded Interactive Brokers to provide sophisticated traders with direct, low-cost access to global markets for stocks, options, futures and more. While the brokerage industry is highly competitive, IBKR's technology-first approach helps maintain its edge with a specific client base.
Benefiting from Interest Rates: A significant portion of the company's revenue is directly sensitive to interest rates, as it earns income on customer credit balances. Rising interest rates, a primary tool used to combat inflation, typically increase IBKR's profitability, providing a natural hedge in such an economic climate.
Thriving on Market Volatility: The uncertainty that often accompanies inflationary periods can lead to higher market volatility and trading volumes. Because a key part of IBKR's revenue comes from commissions, this increased trading activity can provide another significant tailwind for the business during turbulent economic times.

Methodology and Data Sources

Net worth estimates are compiled from publicly available data from sources like Forbes and Bloomberg, primarily reflecting known asset values at specific points in time. They should be considered well-informed estimates, not precise accounting values.

We then adjust all historical figures to their equivalent in today's dollars, calculated using the US Consumer Price Index (CPI) published by the Bureau of Labor Statistics. This methodology provides a more accurate comparison of real purchasing power across different years.