5.4% of US GDP — over $1.2 trillion — circulates in the informal economy. Globally it's $10 trillion+. The relationship between informality and tax compliance is more complex than politicians admit.
$1.2TUS informal economy size (5.4% of GDP)
$10T+Global informal economy
60%Of workers in developing nations are informal
$600BUS annual tax gap (IRS estimate 2021-2023)
Choose your depth. The data doesn't change — just the explanation.
The "informal economy" is all the work and business that happens without being officially recorded — babysitting for cash, selling things at a yard sale, under-the-table construction work. In the US, this is worth over $1 trillion. In poorer countries, most people work this way because it's the only option. It's not all crime — sometimes it's survival.
The informal economy includes legal activity that goes unreported (cash jobs, tips, side gigs), semi-legal activity (unlicensed services), and illegal activity (drugs, fraud). The IRS estimates the US "tax gap" — taxes owed but not paid — at $600B/year for 2021-2023, much of it from informal economy income. Globally, the IMF estimates the informal sector at $10T+, representing 32% of global GDP. Developing economies often have 40-65% informality rates.
Methodology note: "informal economy" is measured via indirect methods (currency demand approach, MIMIC model, electricity consumption). Schneider et al. (2022) IMF Working Paper: US shadow economy 5.4% of GDP = ~$1.2T using MIMIC. IRS gross tax gap 2021-2023: $696B average, net gap (after enforcement) ~$606B. Composition: underreporting of business income 79%, underreporting of employment taxes 10%, nonfiling 7%, underpayment 4%. Key driver: third-party information reporting dramatically reduces evasion — W-2 wages have <1% evasion; self-employment income has 63% evasion rate. Gig economy (1099-K changes): IRS revised Form 1099-K threshold from $20,000 to $600 beginning 2024 — expected to pull significant informal income into compliance.
Schneider F. et al., IMF WP/22/087 (2022): imf.org/en/Publications/WP/Issues/2022/04/22/Shadow-Economies-Around-the-World-What-Did-We-Learn-Over-the-Last-20-Years-517497. IRS Tax Gap: irs.gov/newsroom/irs-releases-tax-gap-estimates. World Bank informal economy: databank.worldbank.org/source/informal-economy-database. OECD tax gap: oecd.org/tax/tax-policy/taxing-wages. Gig economy tax compliance: Government Accountability Office GAO-21-203.
Informal Economy by Country and Region
Informal Economy as % of GDP — Selected Countries
Shadow economy size using MIMIC methodology (Schneider et al. 2022)
US Tax Gap Composition ($B, 2021-2023)
Where the $600B annual tax gap comes from
Informality Rate vs. GDP Per Capita
As countries get richer, informal economy shrinks — but doesn't disappear
💡 Informality Isn't Always Evasion — It's Often Survival
In Bolivia, Zimbabwe, and Nigeria, 50-65% of all economic activity is informal. This isn't primarily tax evasion — it's that formal employment doesn't exist for most workers. The informal economy IS the economy for billions of people. In the US, the $1.2T figure includes everything from unreported tips and cash gigs to complex offshore schemes. The IRS recovery rate is highest from enforcement on complex high-income schemes — not from chasing food cart vendors. The 2023 IRS funding increase targets specifically the top 1% of earners who account for ~28% of the tax gap.