The document discusses estimates of the US tax gap, which is the difference between taxes owed and taxes paid. Some key points:
- The annual tax gap is estimated at around $550 billion for tax year 2019, or about 2.6% of GDP.
- Most of the tax gap comes from underreporting of income, particularly from business income which has little mandatory information reporting.
- Increasing IRS funding for enforcement and expanding information reporting could significantly reduce the tax gap. The Biden plan is estimated to generate over $700 billion in reduced tax gap over 10 years.