When invoicing for a programming gig, it is reasonable to request partial payment upfront for larger, time-consuming projects. One way to handle this is to ask for a percentage of the estimated cost at the start of the project, with the balance paid on completion or additional percentages paid at certain intervals.

For smaller projects, invoicing on completion is also appropriate. Alternatively, you can send monthly invoices. 

Regardless of the payment schedule, be sure to clearly state on each invoice the amount being charged, how much has been paid to date, and the balance left in the approved budget.

How to Create a Programmer’s Invoice

Here is how you can create an invoice using an Invoice Ninja’s template:

• Create an account on Invoice Ninja. The free version gives you four free invoice templates, while the Enterprise & Pro plan has eleven template designs.
• Go to Settings and navigate to Company details to add your logo.
• Select the type of invoice you want to create and choose a template. 
• Include your personal/company name and contact information.
• Fill in the client’s business and contact details in the designated fields.
• Include a description of the invoice, the date it was issued, and the payment date.
• List all services and products, including their rates or prices, descriptions, and applicable taxes.
• Add any relevant payment terms and additional notes in the designated sections.

Best Invoice Practices for a Programmer 

Here are some best practices for invoicing a programmer should follow to simplify the invoicing process:

• Provide multiple channels for clients to contact you in case they have questions. 
• Accept multiple forms of payment, with a focus on electronic methods. 
• Use the professional and easy-to-read invoice templates available on Invoice Ninja. 
• Keep records of all invoices to track payment due dates.
• Review your contract to ensure all terms have been met, and that invoice details match the agreement with the client. 
• List special costs such as late fees and taxes separately. 
• Remind clients promptly if payments are missed.