Interest

"The rate of interest upon the loan or forbearance of any money, goods or things in action shall be $5 upon the $100 for one year and according to that rate for a greater or less sum or for a longer or a shorter time; but parties may contract for the payment and receipt of a rate of interest not exceeding the rate allowed in ss. 138.041 to 138.056, 138.09 to 138.14, 218.0101 to 218.0163, or 422.201, in which case such rate shall be clearly expressed in writing. (138.04)

Except as provided in s. 807.01 (4), if the judgment is for the recovery of money, interest at an annual rate equal to 1 percent plus the prime rate in effect on January 1 of the year in which the judgment is entered if the judgment is entered on or before June 30 of that year or in effect on July 1 of the year in which the judgment is entered if the judgment is entered after June 30 of that year, as reported by the federal reserve board in federal reserve statistical release H. 15, on the amount of the money judgment from the time of verdict, decision, or report until judgment is entered shall be computed by the clerk and added to the costs. (814.04(4))

If there is an offer of settlement by a party under this section which is not accepted and the party recovers a judgment which is greater than or equal to the amount specified in the offer of settlement, the party is entitled to interest at an annual rate equal to 1 percent plus the prime rate in effect on January 1 of the year in which the judgment is entered if the judgment is entered on or before June 30 of that year or in effect on July 1 of the year in which the judgment is entered if the judgment is entered after June 30 of that year, as reported by the federal reserve board in federal reserve statistical release H. 15, on the amount recovered from the date of the offer of settlement until the amount is paid. Interest under this section is in lieu of interest computed under ss. 814.04 (4) and 815.05 (8). (807.01(4)). (807.01)

Except as provided in s. 807.01 (4), every execution upon a judgment for the recovery of money shall direct the collection of interest at an annual rate equal to 1 percent plus the prime rate in effect on January 1 of the year in which the judgment is entered if the judgment is entered on or before June 30 of that year or in effect on July 1 of the year in which the judgment is entered if the judgment is entered after June 30 of that year, as reported by the federal reserve board in federal reserve statistical release H. 15, on the amount recovered from the date of the entry of the judgment until it is paid. (815.05(8))

The amount adjudged due shall draw interest at the rate provided to be paid on the mortgage debt, but shall not exceed the minimum rate prevailing immediately prior to the default on which the foreclosure is based, until the date of sale or payment, and all the installments which shall become due after the date of such judgment shall draw interest at the same rate from the time the same become due. The judgment may enjoin the defendants and all persons claiming under them from committing waste or doing any act that may impair the value of the mortgaged premises. (846.12)

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Interest begins to run on a liquidated claim from the time payment was due under the terms of the contract, or if no such time is specified, from the time demand is made, or if no demand was made prior to commencing an action for recovery, then from the time of the commencement of the action seeking recovery. Estreen v. Bluhm, 255 N.W.2d 473 (Wis. 1977).