Your First Invoice: A Checklist for Side Hustlers

Your first invoice is a small rite of passage

Few things say "real business" like sending an invoice with your name on it. And few things get fumbled more. Not because invoicing is hard. Because nobody sits you down and shows you the checklist. Here it is.

Before you send anything

• A business identity. Even a sole proprietor needs a name, an email that isn't "coolguy94," and contact info that matches what's on your bank account.
• A numbering system. Start at #1001 and never restart. Future-you, doing taxes in April, will thank present-you.
• Payment terms picked and stated on the invoice. Net-14 or net-30. Due date visible. Late policy in one line.
• Payment rails ready. Bank details, a payment link, whatever the client needs to actually pay you.

Ten fields and you're done

Invoice number and date. Due date. Your name and contact. Client's legal name and address (ask for the entity, not "Dave"). Itemized lines with quantities and rates. Subtotal. Tax, if you're registered. Total. Payment instructions. Everything else is decoration, and decoration is what makes first invoices take three hours when they should take ten minutes.

The mistakes that cost real money

Sending a PDF with no due date. Terms don't exist unless they're written. Invoicing the contact instead of the company. Your invoice dies in Dave's inbox. Skipping tax details you're legally required to show. And the classic: waiting weeks after the work to invoice, because motivation fades and so does the client's memory of how good you were.

Invoice the same week you finish the work. Use a tool, not a Word doc. SimplyQuote's free tier covers all of the above and turns the whole checklist into a three-minute task. First invoice: intimidating. Second one: boring. That's the goal.