Invoice Generator for Contractors

Contracting jobs run weeks or months, with shifting scopes and multiple payment milestones. You need invoices that can handle progress billing, change orders, and a clear split between materials and labor — without hiring a bookkeeper.

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Invoicing Challenges for Contractors

Progress Billing for Multi-Phase Jobs

A single invoice at project end is risky for large jobs. You need to bill at each phase — foundation, framing, finishing — and track percentage complete so both you and the client agree on what has been delivered.

Managing Change Orders

Clients request changes mid-project that alter costs and timelines. Without documenting change orders on invoices, you absorb the extra cost or end up in a dispute about what was agreed.

Separating Materials and Labor

Clients and tax authorities both want to see materials and labor broken out. Lumping everything into a single line item creates confusion at tax time and erodes client trust.

Contractors Invoicing Tips

Use Milestone Billing

Define clear milestones (e.g., 30% at demolition complete, 30% at rough-in, 40% at final walkthrough) so cash flows in as work progresses rather than piling up at the end.

Track Retainage Separately

Many contracts hold back 5-10% retainage until project completion. Show retainage as a separate line item on each invoice so both parties can track the cumulative holdback.

Document Change Orders on Invoices

When scope changes, add the change order as a distinct section on the next invoice with its own description, cost, and reference to the signed change order document.

Include Permit and Inspection Costs

If you are passing through permit fees or inspection costs, itemize them separately. Transparency here prevents disputes and shows the client exactly where their money goes.

What to Include on a Contractors Invoice

Project name and job site address
Phase or milestone description
Materials with itemized costs
Labor hours and rates by trade
Change order references and amounts
Retainage held to date
Permit and inspection fees
Balance due this period

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Frequently Asked Questions

How do contractors handle progress billing?

Progress billing invoices show the percentage of work completed to date, the total contract amount, amounts previously billed, retainage held, and the current amount due. Each invoice builds on the last so the client sees cumulative progress.

Should I separate materials and labor on my invoice?

Yes. Separating materials and labor is standard practice in contracting. It helps clients understand costs, satisfies lien-waiver requirements in many states, and simplifies your own tax deductions.

How do I invoice for change orders?

Reference the signed change order number, describe the additional or modified work, and list the cost on a separate line. This creates a clear audit trail tied to an approved scope change.

What is retainage and how do I show it?

Retainage is a percentage (typically 5-10%) withheld from each progress payment until the project is complete. Show it as a deduction line on each invoice and track the cumulative retainage balance.