Visit disaster declaration tax payments for more information. Capital gains from investments are treated as ordinary personal income and taxed at the same rate. Gains from the sale of one’s home that are less than $250,000 are not taxable. Visit the official state government’s website to pay individual income tax online. Such high rates often support state infrastructure Medical Billing Process and services. Services include education, healthcare, and transportation. What Tax Credits Are Available to California Residents? For a more detailed estimate that takes these factors into account, click “View Detailed Estimate” (this will will redirect to an external website).