Use of a charge card or ACH may incur a convenience fee. The City of Somerville receives only your bill payment amount. Convenience fees cover various administrative costs associated with accepting payments and are non-refundable. The convenience fee when using credit cards is a percentage-based or flat rate fee that varies depending on the card type, amount and the type of bill you are paying. The convenience fee is automatically calculated and is shown on the payment page before you submit your payment for processing. Convenience fees will appear as a separate charge from the bill amount on your bank or credit card statement.