Repeat work often starts with a good job and a clear handover, not a campaign of regular sales messages. Keep the relationship useful and respect that customers may not want ongoing contact.
Finish the job with a good handover
Explain what was completed, provide relevant product or maintenance information, and leave the customer with your correct contact details. If there are limits, warranties or care instructions, make them clear and accurate rather than promising more than the manufacturer or your agreement supports.
Follow up for a reason
A short message can confirm that the customer received paperwork or ask whether they have a question about the completed work. Keep it relevant and do not turn a service check into an unexpected sequence of promotions. A reminder for maintenance may be useful only where it genuinely applies and the customer has agreed to that type of contact.
Treat marketing permission carefully
Rules for email, text and other direct marketing can differ, including for individuals and business contacts. Do not assume that completing a job gives blanket permission to send future promotions. The ICO's direct marketing guidance explains the rules; check the current guidance for your specific channel and audience.
Keep only the customer information needed for your work, protect it and honour opt-outs. For sustainable growth, see our trade referral routine and guide to measuring enquiries.