With bill-in-advance (BIA) invoicing, you pay in advance for service for the upcoming period (quarterly, semi-annually or annually) based on an estimate of the charges that will be incurred. The estimate is an educated guess, calculated using information about your current account setup (e.g., number and type of dosimeters and special reports, dosimeter shipping options, etc.).
Your balance due will be calculated based on differences between the estimated balance and actual cost of service used for the prior period.
Let’s look at an example with semi-annual billing, where the current invoice is dated June 17, 2020 and the previous invoice is dated December 17, 2019. Click HERE to download the invoice. The previous invoice contains an estimate of $9,032.45, as the cost of service between December 17, 2019 and June 17, 2020. This amount would have been paid with the previous invoice. When you receive your invoice for June 17, 2020, the actual cost of service between December 17, 2019 and June 17, 2020 is determined to be $13,315.45, leaving a balance due of $4,283.00 for the previous 6-month period. Additionally, the current invoice contains an estimate of $9,379.10 for the next 6-month period from June 17, 2020 to December 17, 2020. The total amount due on this invoice is thus $13,662.10.