Invoicing and Payment: the full procedure

Invoice completed work promptly and accurately against the approved estimate and collect payment on agreed terms.

• Applies to: Owner / office
• Frequency: Every completed job / milestone
• Scope: Covers issuing invoices that match the approved estimate and tracking payment to closeout. Does not cover tax filing or accounting beyond capturing what’s needed; tax handling defers to your accountant and tax authority.

What you need

• Invoicing software/template
• The approved estimate
• Completion photos and finish-level record
• Payment methods
• Accounts-receivable tracker

The procedure, step by step

1. Confirm work is complete and signed off — Verify the job (or milestone) is finished to the approved finish level, with the field sign-off and completion photos on file before invoicing.
2. Invoice against the estimate — Build the invoice from the approved estimate — same scope, finish level, and price. Bill approved change orders separately and clearly; never silently inflate.
3. Itemize clearly — Show the work performed, finish level/texture per area, any deposit credited, and the balance due. A clear invoice gets paid faster and prevents disputes.
4. State terms and due date — Include the payment terms agreed in the estimate, the due date, accepted payment methods, and any late terms. Don’t surprise the customer.
5. Send promptly — Invoice as soon as work is complete (or the milestone hit). Speed of invoicing drives speed of payment.
6. Record the receivable — Log the invoice as outstanding with its due date so it’s tracked, not forgotten.
7. Follow up on overdue balances — When an invoice passes due, follow up promptly and politely with a reminder per a set cadence. Consistent follow-up collects more.
8. Close out and file — On payment, mark the invoice paid, file it with the estimate, photos, and finish-level record, and trigger the warranty period.

Quality check before you finish

• Work is confirmed complete to the approved finish level with sign-off and photos before invoicing.
• The invoice matches the approved estimate; change orders are billed separately and clearly.
• Line items show work, finish level/texture, deposit credited, and balance due.
• Payment terms, due date, and accepted methods are stated.
• The invoice is sent promptly after completion or milestone.
• The receivable is logged and overdue balances followed up on a set cadence.
• Paid invoices are filed with the estimate and records, and the warranty period is triggered.

This is a free, source-anchored standard operating procedure (SOP) you can print and hand to staff. It documents the work sequence for a Drywall business — not safety or regulatory rulings, which defer to the cited authorities, the applicable code, and your own health-and-safety plan. Open the tool above to print it, toggle ink-saver, or (with a free ToolFluency Business account) edit it to match your own workflow.

Sources

• U.S. Small Business Administration — invoicing and getting paid (https://sba.gov)
• IRS — recordkeeping for small business (https://irs.gov)
• SCORE — cash flow and collections guidance (https://score.org)