Art. 16 Federal Act of October 13, 1965, on Anticipatory Tax (WHTA)
Art. 16 LIA
The anticipatory tax becomes due: a. on the interest of cash bonds and client deposits with Swiss banks or savings institutions: thirty days after the expiration of each commercial quarter for the interest accrued during that quarter; b. ... c. on other income from movable capital, on winnings from gambling not exempt from tax according to art. 24, let. i to i ter, LIFD, and on winnings from skill games or promotional lotteries not exempt from tax according to art. 24, let. j, LIFD: thirty days after the tax claim arises (art. 12); d. on insurance benefits: thirty days after the end of each month for benefits executed during that month.
Interest on arrears is due, without formal notice, on tax amounts once the deadlines set in para. 1 have expired. The Federal Department of Finance determines the interest rate.
No interest on arrears is due if the material conditions for the fulfillment of the tax obligation by declaring the taxable benefit are met in accordance with: a. art. 20 and its implementing provisions, abis. art. 20 a and its implementing provisions, or b. the applicable international treaty in the specific case and its implementing provisions.
The opening of bankruptcy proceedings against the debtor or the transfer of their domicile or place of residence abroad triggers the due date of the tax.