https://www.crfb.org/blogs/primer-understanding-tax-gap https://www.crfb.org/blogs/primer-understanding-tax-gap The IRS estimates there's a net tax gap of $554

https://www.crfb.org/blogs/primer-understanding-tax-gap https://www.crfb.org/blogs/primer-understanding-tax-gap The IRS estimates there's a net tax gap of $554 billion in 2019. They break it down into 5 categories with values from 2011-2013 that all are over 20 billion each: underreported income, over/misreported adjustments, underpayment, non-filing, and other underreporting. They note that their 2011-2013 estimate failed to include underreporting of offshore wealth and wealth going through pass through entities, which resulted in a tax gap of $33 billion per year to the 2011-2013 estimate and 46 billion for 2019.