Do monthly allowances roll-over?

Monthly plan allowances for scans do not roll-over. The allowances for incoming mail and scans are a set limit for each billing cycle. Once that billing cycle ends, the allowances will reset.

For example, if you are on the Plus Plan, which comes with 50 scans per month, but you only use 25 scans during that cycle, the remaining 25 will not carry over to the next billing cycle and total to 75. The allowance will simply reset back to 50.