Approximately £600 of diesel was stolen from two of the Normacot, Stoke-based sand and gravel dealer's lorries at its Bengry Road site between 6pm on Thursday 20 November and 5am the following morning.
However partner David Whitfield says the firm has been left £2,000 out of pocket once the wages for jobs that could not be done are taken into account.
Whitfield claims: "That's our profits gone for a week. We are the industry that has been hit worst by the recession because we deliver to the construction industry." Anyone with any information is asked to contact Staffordshire Police on 0300 123 4455.