Section 303-18-007 - Interest007.01 Interest shall be assessed and collected by NPERS from any employer who submits an insufficient contribution. Interest shall be calculated from the date the employee or employer contribution was due to be remitted to NPERS until the date such contribution is remitted.007.02 The rate of interest to be assessed on insufficient contributions, repayment of excess benefits, or paid to the member on account of deficient benefit payments, shall be the rate of regular interest as defined or determined under the County Employees Retirement Act, the Judges Retirement Act, the School Employees Retirement Act, the Nebraska State Patrol Retirement Act, or the State Employees Retirement Act, as appropriate.303 Neb. Admin. Code, ch. 18, § 007