# Protect your QSBS tax break

QSBS is a powerful tax provision allowing startup founders, employees, and investors to potentially save up to millions in capital gains taxes when selling eligible company shares.

With [recent legislation](/content/blog/policy-weekly-06-03-25/index.html) expanding the rules and benefits of QSBS, knowing how to maintain eligibility is crucial to protecting your potential tax savings.

Carta’s free eligibility guide is a great place to start, covering:

- The QSBS expansion and what it means for companies and shareholders
- Common pitfalls that can jeopardize your QSBS status
- Why annual QSBS reviews and attestation letters matter
- How Carta can help you maximize savings on capital gains