Pebble charges a reporting fee for using the feature. This fee helps cover the cost of reporting your bill payments to the credit bureaus.
The cost for NFCC members is 99c and $1.99 for once-off and unlimited reporting respectively.
Note: Missing the Pebble reporting fee can negatively impact your credit score. Since this fee is part of the bill receipt furnishment, failure to pay it may be reflected in your credit report. To avoid this, ensure that you have sufficient funds available on day 14, when the reporting fee is due. Pebble will also send reminders when your payment is coming up, helping you stay on track.