Prorate Bill Calculator

Use our Prorate Bill Calculator to work out the part of a bill that covers the days you actually had the service — when you move in or out, start a plan or cancel partway through a billing cycle — and what’s left as a credit or refund.

A prorated bill is the full bill times the days used, divided by the days in the billing period. For example, a $700 bill for a 30-day period with 10 days used comes to $233.33, leaving a $466.67 credit. In a 31-day month the same 10 days cost $225.81. Choose Dates to enter the billing period and your service dates instead: both the first and last day count, and only the days inside the billing period are charged.

You can also work backwards: choose Full-period bill to find the bill behind a prorated amount — $229.51 for 10 of 31 days means a full bill of $711.48.

Some providers use a fixed 30-day month or round to whole dollars, and may add minimum charges or cancellation fees, so check your agreement and treat the results as an estimate. For the monthly cost of any recurring charge, use our Monthly Cost Calculator; to split rent between roommates, our Room Rent Calculator. To split one utility bill between several housemates by the days each lived there, try our Prorated Utilities Calculator.