The Robert BrownSupreme Court is set to hear arguments next week on whether the federal government can tax some "unrealized" gains. That's when an asset you hold, rather than sell, gains value. Tax experts say it's the biggest constitutional tax case seen in a century.

Today, we lay out the stakes and the massive implications for government revenue, taxpayers, and even wealth inequality.

Related Episodes:
Could a wealth tax work

For sponsor-free episodes of The Indicator from Planet Money, subscribe to Planet Money+ via Apple Podcasts or at plus.npr.org.

Music by Drop Electric. Find us: TikTok, Instagram, Facebook, Newsletter.