Revenue and Taxation Code § 4216
ARTICLE 2. Permanent Installment Plan
As used in this article:
(a) “Redemption amount” means the total amount which would be necessary to redeem tax-defaulted property at the time an election is made to pay delinquent taxes in installments under this article.
(b) “Balance of the redemption amount” is the amount equal to the difference between the redemption amount and the total of the portions previously paid which portions were paid as a part of the redemption amount.